Last data update: Mar 21, 2025. (Total: 48935 publications since 2009)
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Query Trace: Southwick K[original query] |
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Laboratory Analysis of an Outbreak of Candida auris in New York from 2016 to 2018-Impact and Lessons Learned (preprint)
Zhu Y , O'Brien B , Leach L , Clark A , Bates M , Adams E , Ostrowsky B , Quinn M , Dufort E , Southwick K , Erazo R , Haley VB , Bucher C , Chaturvedi V , Limberger RJ , Blog D , Lutterloh E , Chaturvedi S . bioRxiv 2019 760090 Candida auris is a multidrug-resistant yeast which has emerged in healthcare facilities worldwide, however little is known about identification methods, patient colonization, spread, environmental survival, and drug resistance. Colonization on both biotic and abiotic surfaces, along with travel, appear to be the major factors for the spread of this pathogen across the globe. In this investigation, we present laboratory findings from an ongoing C. auris outbreak in NY from August 2016 through 2018. A total of 540 clinical isolates, 11,035 patient surveillance specimens, and 3,672 environmental surveillance samples were analyzed. Laboratory methods included matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for yeast isolate identification, real-time PCR for rapid surveillance sample screening, culture on selective/non-selective media for recovery of C. auris and other yeasts from surveillance samples, antifungal susceptibility testing to determine the C. auris resistance profile, and Sanger sequencing of ribosomal genes for C. auris genotyping. Results included: a) identification and confirmation of C. auris in 413 clinical isolates and 931 patient surveillance isolates, as well as identification of 277 clinical cases and 350 colonized cases from 151 healthcare facilities including 59 hospitals, 92 nursing homes, 1 long-term acute care hospital (LTACH), and 2 hospices, b) successful utilization of an in-house developed C. auris real-time PCR assay for the rapid screening of patient and environmental surveillance samples, c) demonstration of relatively heavier colonization of C. auris in nares compared to the axilla/groin, and d) predominance of the South Asia Clade I with intrinsic resistance to fluconazole and elevated minimum inhibitory concentration (MIC) to voriconazole (81%), amphotericin B (61%), 5-FC (3%) and echinocandins (1%). These findings reflect greater regional prevalence and incidence of C. auris and the deployment of better detection tools in an unprecedented outbreak. |
Candida auris Admission Screening Pilot in Select Units of New York City Healthcare Facilities, 2017-2019.
Rowlands J , Dufort E , Chaturvedi S , Zhu Y , Quinn M , Bucher C , Erazo R , Haley V , Kuang J , Ostrowsky B , Southwick K , Vallabhaneni S , Greenko J , Tserenpuntsag B , Blog D , Lutterloh E . Am J Infect Control 2023 51 (8) 866-870 ![]() ![]() BACKGROUND: This pilot project implemented admission screening for Candida auris (C. auris) using real-time polymerase chain reaction (rt-PCR) in select high-risk units within health care facilities in New York City. METHODS: An admission screening encounter consisted of collecting 2 swabs, to be tested by rt-PCR, and a data collection form for individuals admitted to ventilator units at 2 nursing homes (NHA and NHB), and the ventilator/pulmonary unit, intensive care unit, and cardiac care unit at a hospital (Hospital C) located in New York City from November 2017 to November 2019. RESULTS: C. auris colonization was identified in 6.9% (n = 188/2,726) of admissions to participating units. Rates were higher among admissions to NHA and NHB (20.7% and 22.0%, respectively) than Hospital C (3.6%). Within Hospital C, the ventilator/pulmonary unit had a higher rate (5.7%) than the intensive care unit (3.8%) or cardiac care unit (2.5%). DISCUSSION: Consistent with prior research, we found that individuals admitted to ventilator units were at higher risk of C. auris colonization. CONCLUSIONS: This project demonstrates the utility of admission screening using rt-PCR testing to rapidly identify C. auris colonization among admissions to health care facilities so that appropriate transmission-based precautions and control measures can be implemented rapidly to help decrease transmission. |
Antifungal Resistance Trends of Candida auris Clinical Isolates, New York-New Jersey, 2016-2020
Kilburn S , Innes G , Quinn M , Southwick K , Ostrowsky B , Greenko JA , Lutterloh E , Greeley R , Magleby R , Chaturvedi V , Chaturvedi S . Antimicrob Agents Chemother 2022 66 (3) aac0224221 About 55% of U.S. Candida auris clinical cases were reported from New York and New Jersey from 2016 through 2020. Nearly all New York-New Jersey clinical isolates (99.8%) were fluconazole resistant, and 50% were amphotericin B resistant. Echinocandin resistance increased from 0% to 4% and pan-resistance increased from 0 to <1% for New York C. auris clinical isolates but not for New Jersey, highlighting the regional differences. |
A Description of the First Candida auris -Colonized Individuals in New York State, 2016-2017
Southwick K , Ostrowsky B , Greenko J , Adams E , Lutterloh E , Denis RJ , Patel R , Erazo R , Fernandez R , Bucher C , Quinn M , Green C , Chaturvedi S , Leach L , Zhu Y . Am J Infect Control 2021 50 (3) 358-360 Candida auris (C. auris) is a globally-emerging multi-drug resistant yeast. New York State (NYS) first detected C. auris in July 2016 and is the state most affected. This brief report describes characteristics of the first 114 individuals colonized with C. auris identified through active surveillance/screening by NYS Department of Health (NYSDOH). "Colonized/screened" individuals were old (median age,74 year), had extensive healthcare exposures and underlying conditions (multiple healthcare facility admissions in the 90 days prior with more than 80% requiring mechanical ventilation), and had 30 and 90 day mortality rates of 17.5% and 37.7%, respectively (with approximately 60% expired in the two-year follow-up period). This description is helpful to inform additional prevention measures and add to the collective understanding of C. auris in the U.S. |
Real-Time Virtual Infection Prevention and Control Assessments in Skilled Nursing Homes, New York, March 2020 - A Pilot Project.
Ostrowsky B , Weil LM , Olaisen R , Stricof R , Adams E , Tsivitis M , Eramo A , Giardina R , Erazo R , Southwick K , Greenko J , Lutterloh E , Blog D , Green C , Carrasco K , Fernandez R , Vallabhaneni S , Quinn M , Kogut S , Bennett J , Chico D , Luzinas M . Infect Control Hosp Epidemiol 2021 43 (3) 1-27 OBJECTIVE: to describe a pilot infection prevention and control (IPC) assessment conducted in skilled nursing facilities (SNFs) in New York State (NYS) during a pivotal two-week period when the region became the nation's epicenter for COVID-19. DESIGN: a telephone and video assessment of IPC measures in SNFs at high risk or experiencing COVID-19 activity. PARTICIPANTS: SNFs in 14 NYS counties including New York City. INTERVENTION: a three-component remote IPC assessment: 1) screening tool; 2) telephone IPC checklist; and 3) COVID-19 video IPC assessment ("COVIDeo"). RESULTS: 92 SNFs completed the IPC screening tool and checklist; 52/92 (57%) were conducted as part COVID-19 investigations, and 40/92 (43%) were proactive prevention-based assessments. Among the 40 proactive assessments, 14/40 (35%) identified suspected or confirmed COVID-19 cases. COVIDeo was performed in 26/92 (28%) of assessments and provided observations that other tools would have missed including: PPE (personal protective equipment) that was not easily accessible, redundant, or improperly donned, doffed, or stored and specific challenges implementing IPC in specialty populations. The IPC assessments took approximately one hour each, reached an estimated four times as many SNFs as onsite visits in a similar timeframe. CONCLUSIONS: Remote IPC assessments by telephone and video provided a timely and feasible method to assess the extent to which IPC interventions had been implemented in a vulnerable setting and to disseminate real-time recommendations. Remote assessments are now being implemented across NYS and in various healthcare facility types. Similar methods have been adapted nationally through CDC. |
Investigation of presumptive HIV transmission associated with hospitalization using nucleotide sequence analysis - New York, 2017
Anderson BJ , Clement E , Collura R , Gallucci A , Westheimer E , Braunstein S , Southwick K , Adams E , Lutterloh E , Gonzalez C , McDonald R , Jia H , Switzer WM , Patel PR , Joyce MP , Oster AM . MMWR Morb Mortal Wkly Rep 2020 69 (10) 260-264 ![]() Since implementation of Standard Precautions* for the prevention of bloodborne pathogen transmission in 1985, health care-associated transmission of human immunodeficiency virus (HIV) in the United States has been rare (1). In October 2017, the New York City Department of Health and Mental Hygiene (NYCDOHMH) and the New York State Department of Health (NYSDOH) were notified by a clinician of a diagnosis of acute HIV infection in a young adult male (patient A) without recognized risk factors (i.e., he was monogamous, had an HIV-negative partner, and had no injection drug use) who had recently been hospitalized for a chronic medical condition. The low risk coupled with the recent hospitalization and medical procedures prompted NYSDOH, NYCDOHMH, and CDC to investigate this case as possible health care-associated transmission of HIV. Among persons with known HIV infection who had hospitalization dates overlapping those of patient A, one person (patient B) had an HIV strain highly similar to patient A's strain by nucleotide sequence analysis. The sequence relatedness, combined with other investigation findings, indicated a likely health care-associated transmission. Nucleotide sequence analysis, which is increasingly used for detecting HIV clusters (i.e., persons with closely related HIV strains) and to inform public health response (2,3), might also be used to identify possible health care-associated transmission of HIV to someone with health care exposure and no known HIV risk factors (4). |
Laboratory Analysis of an Outbreak of Candida auris in New York from 2016 to 2018-Impact and Lessons Learned.
Zhu Y , O'Brien B , Leach L , Clark A , Bates M , Adams E , Ostrowsky B , Quinn M , Dufort E , Southwick K , Erazo R , Haley VB , Bucher C , Chaturvedi V , Limberger RJ , Blog D , Lutterloh E , Chaturvedi S . J Clin Microbiol 2019 58 (4) ![]() ![]() Candida auris is a multidrug-resistant yeast which has emerged in healthcare facilities worldwide, however little is known about identification methods, patient colonization, environmental survival, spread, and drug resistance. Colonization on both biotic (patients) and abiotic (healthcare objects) surfaces, along with travel, appear to be the major factors for the spread of this pathogen across the globe. In this investigation, we present laboratory findings from an ongoing C. auris outbreak in New York (NY) from August 2016 through 2018. A total of 540 clinical isolates, 11,035 patient surveillance specimens, and 3,672 environmental surveillance samples were analyzed. Laboratory methods included matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for yeast isolate identification, real-time PCR for rapid surveillance sample screening, culture on selective/non-selective media for recovery of C. auris and other yeasts from surveillance samples, antifungal susceptibility testing to determine the C. auris resistance profile, and Sanger sequencing of the internal transcribed spacer (ITS) and D1/D2 regions of the ribosomal gene for C. auris genotyping. Results included: a) identification and confirmation of C. auris in 413 clinical isolates and 931 patient surveillance isolates, as well as identification of 277 clinical cases and 350 colonized cases from 151 healthcare facilities including 59 hospitals, 92 nursing homes, 1 long-term acute care hospital (LTACH), and 2 hospices, b) successful utilization of an in-house developed C. auris real-time PCR assay for the rapid screening of patient and environmental surveillance samples, c) demonstration of relatively heavier colonization of C. auris in nares compared to the axilla/groin, and d) predominance of the South Asia clade I with intrinsic resistance to fluconazole and elevated minimum inhibitory concentration (MIC) to voriconazole (81%), amphotericin B (61%), 5-FC (3%) and echinocandins (1%). These findings reflect greater regional prevalence and incidence of C. auris and the deployment of better detection tools in an unprecedented outbreak. |
Multiple introductions and subsequent transmission of multidrug-resistant Candida auris in the USA: a molecular epidemiological survey.
Chow NA , Gade L , Tsay SV , Forsberg K , Greenko JA , Southwick KL , Barrett PM , Kerins JL , Lockhart SR , Chiller TM , Litvintseva AP . Lancet Infect Dis 2018 18 (12) 1377-1384 ![]() ![]() BACKGROUND: Transmission of multidrug-resistant Candida auris infection has been reported in the USA. To better understand its emergence and transmission dynamics and to guide clinical and public health responses, we did a molecular epidemiological investigation of C auris cases in the USA. METHODS: In this molecular epidemiological survey, we used whole-genome sequencing to assess the genetic similarity between isolates collected from patients in ten US states (California, Connecticut, Florida, Illinois, Indiana, Maryland, Massachusetts, New Jersey, New York, and Oklahoma) and those identified in several other countries (Colombia, India, Japan, Pakistan, South Africa, South Korea, and Venezuela). We worked with state health departments, who provided us with isolates for sequencing. These isolates of C auris were collected during the normal course of clinical care (clinical cases) or as part of contact investigations or point prevalence surveys (screening cases). We integrated data from standardised case report forms and contact investigations, including travel history and epidemiological links (ie, patients that had shared a room or ward with a patient with C auris). Genetic diversity of C auris within a patient, a facility, and a state were evaluated by pairwise differences in single-nucleotide polymorphisms (SNPs). FINDINGS: From May 11, 2013, to Aug 31, 2017, isolates that corresponded to 133 cases (73 clinical cases and 60 screening cases) were collected. Of 73 clinical cases, 66 (90%) cases involved isolates related to south Asian isolates, five (7%) cases were related to South American isolates, one (1%) case to African isolates, and one (1%) case to east Asian isolates. Most (60 [82%]) clinical cases were identified in New York and New Jersey; these isolates, although related to south Asian isolates, were genetically distinct. Genomic data corroborated five (7%) clinical cases in which patients probably acquired C auris through health-care exposures abroad. Among clinical and screening cases, the genetic diversity of C auris isolates within a person was similar to that within a facility during an outbreak (median SNP difference three SNPs, range 0-12). INTERPRETATION: Isolates of C auris in the USA were genetically related to those from four global regions, suggesting that C auris was introduced into the USA several times. The five travel-related cases are examples of how introductions can occur. Genetic diversity among isolates from the same patients, health-care facilities, and states indicates that there is local and ongoing transmission. FUNDING: US Centers for Disease Control and Prevention. |
Candida auris in healthcare facilities, New York, USA, 2013-2017
Adams E , Quinn M , Tsay S , Poirot E , Chaturvedi S , Southwick K , Greenko J , Fernandez R , Kallen A , Vallabhaneni S , Haley V , Hutton B , Blog D , Lutterloh E , Zucker H . Emerg Infect Dis 2018 24 (10) 1816-1824 Candida auris is an emerging yeast that causes healthcare-associated infections. It can be misidentified by laboratories and often is resistant to antifungal medications. We describe an outbreak of C. auris infections in healthcare facilities in New York City, New York, USA. The investigation included laboratory surveillance, record reviews, site visits, contact tracing with cultures, and environmental sampling. We identified 51 clinical case-patients and 61 screening case-patients. Epidemiologic links indicated a large, interconnected web of affected healthcare facilities throughout New York City. Of the 51 clinical case-patients, 23 (45%) died within 90 days and isolates were resistant to fluconazole for 50 (98%). Of screening cultures performed for 572 persons (1,136 total cultures), results were C. auris positive for 61 (11%) persons. Environmental cultures were positive for samples from 15 of 20 facilities. Colonization was frequently identified during contact investigations; environmental contamination was also common. |
Two imported cases of congenital rubella syndrome and infection-control challenges in New York State, 2013-2015
Robyn M , Dufort E , Rosen JB , Southwick K , Bryant PW , Greenko J , Adams E , Kurpiel P , Alvarez KJ , Burstein G , Sen K , Vasquez D , Rausch-Phung E , Schulte C , Lutterloh E , Blog D . J Pediatric Infect Dis Soc 2017 7 (2) 172-174 Rubella was declared eliminated in the United States in 2004. During 2013-2015, 2 infants with congenital rubella syndrome (CRS) were born in New York State. Both mothers were foreign born and traveled to Yemen during their pregnancy. Delayed consideration of CRS led to preventable exposures and a substantial public health response. |
Investigation of the first seven reported cases of Candida auris, a globally emerging invasive, multidrug-resistant fungus - United States, May 2013-August 2016
Vallabhaneni S , Kallen A , Tsay S , Chow N , Welsh R , Kerins J , Kemble SK , Pacilli M , Black SR , Landon E , Ridgway J , Palmore TN , Zelzany A , Adams EH , Quinn M , Chaturvedi S , Greenko J , Fernandez R , Southwick K , Furuya EY , Calfee DP , Hamula C , Patel G , Barrett P , Lafaro P , Berkow EL , Moulton-Meissner H , Noble-Wang J , Fagan RP , Jackson BR , Lockhart SR , Litvintseva AP , Chiller TM . MMWR Morb Mortal Wkly Rep 2016 65 (44) 1234-1237 Candida auris, an emerging fungus that can cause invasive infections, is associated with high mortality and is often resistant to multiple antifungal drugs. C. auris was first described in 2009 after being isolated from external ear canal discharge of a patient in Japan. Since then, reports of C. auris infections, including bloodstream infections, have been published from several countries, including Colombia, India, Israel, Kenya, Kuwait, Pakistan, South Africa, South Korea, Venezuela, and the United Kingdom. To determine whether C. auris is present in the United States and to prepare for the possibility of transmission, CDC issued a clinical alert in June 2016 informing clinicians, laboratorians, infection control practitioners, and public health authorities about C. auris and requesting that C. auris cases be reported to state and local health departments and CDC. This report describes the first seven U.S. cases of C. auris infection reported to CDC as of August 31, 2016. Data from these cases suggest that transmission of C. auris might have occurred in U.S. health care facilities and demonstrate the need for attention to infection control measures to control the spread of this pathogen. |
Latent typologies of posttraumatic stress disorder in World Trade Center responders
Horn SR , Pietrzak RH , Schechter C , Bromet EJ , Katz CL , Reissman DB , Kotov R , Crane M , Harrison DJ , Herbert R , Luft BJ , Moline JM , Stellman JM , Udasin IG , Landrigan PJ , Zvolensky MJ , Southwick SM , Feder A . J Psychiatr Res 2016 83 151-159 Posttraumatic stress disorder (PTSD) is a debilitating and often chronic psychiatric disorder. Following the 9/11/2001 World Trade Center (WTC) attacks, thousands of individuals were involved in rescue, recovery and clean-up efforts. While a growing body of literature has documented the prevalence and correlates of PTSD in WTC responders, no study has evaluated predominant typologies of PTSD in this population. Participants were 4352 WTC responders with probable WTC-related DSM-IV PTSD. Latent class analyses were conducted to identify predominant typologies of PTSD symptoms and associated correlates. A 3-class solution provided the optimal representation of latent PTSD symptom typologies. The first class, labeled "High-Symptom (n = 1,973, 45.3%)," was characterized by high probabilities of all PTSD symptoms. The second class, "Dysphoric (n = 1,371, 31.5%)," exhibited relatively high probabilities of emotional numbing and dysphoric arousal (e.g., sleep disturbance). The third class, "Threat (n = 1,008, 23.2%)," was characterized by high probabilities of re-experiencing, avoidance and anxious arousal (e.g., hypervigilance). Compared to the Threat class, the Dysphoric class reported a greater number of life stressors after 9/11/2001 (OR = 1.06). The High-Symptom class was more likely than the Threat class to have a positive psychiatric history before 9/11/2001 (OR = 1.7) and reported a greater number of life stressors after 9/11/2001 (OR = 1.1). The High-Symptom class was more likely than the Dysphoric class, which was more likely than the Threat class, to screen positive for depression (83% > 74% > 53%, respectively), and to report greater functional impairment (High-Symptom > Dysphoric [Cohen d = 0.19], Dysphoric > Threat [Cohen d = 0.24]). These results may help inform assessment, risk stratification, and treatment approaches for PTSD in WTC and disaster responders. |
Risk, coping and PTSD symptom trajectories in World Trade Center responders
Feder A , Mota N , Salim R , Rodriguez J , Singh R , Schaffer J , Schechter CB , Cancelmo LM , Bromet EJ , Katz CL , Reissman DB , Ozbay F , Kotov R , Crane M , Harrison DJ , Herbert R , Levin SM , Luft BJ , Moline JM , Stellman JM , Udasin IG , Landrigan PJ , Zvolensky MJ , Yehuda R , Southwick SM , Pietrzak RH . J Psychiatr Res 2016 82 68-79 Trajectories of disaster-related posttraumatic stress disorder (PTSD) symptoms are often heterogeneous, and associated with common and unique risk factors, yet little is known about potentially modifiable psychosocial characteristics associated with low-symptom and recovering trajectories in disaster responders. A total of 4487 rescue and recovery workers (1874 police and 2613 non-traditional responders) involved during and in the aftermath of the unprecedented World Trade Center (WTC) attacks, were assessed an average of 3, 6, 8, and 12 years post-9/11/2001. Among police responders, WTC-related PTSD symptoms were characterized by four trajectories, including no/low-symptom (76.1%), worsening (12.1%), improving (7.5%), and chronic (4.4%) trajectories. In non-traditional responders, a five-trajectory solution was optimal, with fewer responders in a no/low-symptom trajectory (55.5%), and the remainder in subtly worsening (19.3%), chronic (10.8%), improving (8.5%), and steeply worsening (5.9%) trajectories. Consistent factors associated with symptomatic PTSD trajectories across responder groups included Hispanic ethnicity, pre-9/11 psychiatric history, greater WTC exposure, greater medical illness burden, life stressors and post-9/11 traumas, and maladaptive coping (e.g., substance use, avoidance coping). Higher perceived preparedness, greater sense of purpose in life, and positive emotion-focused coping (e.g., positive reframing, acceptance) were negatively associated with symptomatic trajectories. Findings in this unique cohort indicate considerable heterogeneity in WTC-related PTSD symptom trajectories over 12 years post-9/11/2001, with lower rates of elevated PTSD symptoms in police than in non-traditional responders. They further provide a comprehensive risk prediction model of PTSD symptom trajectories, which can inform prevention, monitoring, and treatment efforts in WTC and other disaster responders. |
Posttraumatic stress symptoms and smoking among World Trade Center disaster responders: A longitudinal investigation
Zvolensky MJ , Farris SG , Kotov R , Schechter CB , Bromet E , Gonzalez A , Vujanovic A , Pietrzak RH , Crane M , Kaplan J , Moline J , Southwick SM , Feder A , Udasin I , Reissman DB , Luft BJ . Compr Psychiatry 2015 63 46-54 PURPOSE: The current longitudinal study examined posttraumatic stress disorder (PTSD) symptom severity in relation to smoking abstinence and reduction over time among responders to the World Trade Center (WTC) disaster. METHOD: Participants were 763 police and 1881 non-traditional (e.g., construction workers) WTC responders who reported being smokers at an initial examination obtained between July 2002 and July 2011 at the WTC Health Program (WTC-HP). WTC responders were reassessed, on average, 2.5years later. RESULTS: For police WTC responders, higher levels of WTC-related PTSD symptoms at the initial visit were associated with a decreased likelihood of smoking abstinence (OR=0.98, p=.002) and with decreased smoking reduction (beta=-.06, p=.012) at the follow-up visit. WTC-related PTSD symptom severity was not related to likelihood of smoking abstinence or change in number of cigarettes smoked among non-traditional responders. Post hoc analyses suggested that for police, hyperarousal PTSD symptoms were predictive of decreased abstinence likelihood at the follow-up visit (OR=0.56, p=.006). DISCUSSION: The present findings suggest that PTSD symptoms may be differentially related to smoking behavior among police and non-traditional WTC responders in a naturalistic, longitudinal investigation. Future work may benefit from exploring further which aspects of PTSD (as compared to each other and to common variance) explain smoking maintenance. |
Posttraumatic stress disorder and the risk of respiratory problems in World Trade Center responders: longitudinal test of a pathway
Kotov R , Bromet EJ , Schechter C , Broihier J , Feder A , Friedman-Jimenez G , Gonzalez A , Guerrera K , Kaplan J , Moline J , Pietrzak RH , Reissman D , Ruggero C , Southwick SM , Udasin I , Von Korff M , Luft BJ . Psychosom Med 2015 77 (4) 438-48 OBJECTIVE: Posttraumatic stress disorder (PTSD) is associated with high medical morbidity, but the nature of this association remains unclear. Among responders to the World Trade Center (WTC) disaster, PTSD is highly comorbid with lower respiratory symptoms (LRS), which cannot be explained by exposure alone. We sought to examine this association longitudinally to establish the direction of the effects and evaluate potential pathways to comorbidity. METHODS: 18,896 responders (8466 police and 10,430 nontraditional responders) participating in the WTC-Health Program were first evaluated between 2002 and 2010 and assessed again 2.5 years later. LRS were ascertained by medical staff, abnormal pulmonary function by spirometry, and probable WTC-related PTSD with a symptom inventory. RESULTS: In both groups of responders, initial PTSD (standardized regression coefficient: beta = 0.20 and 0.23) and abnormal pulmonary function (beta = 0.12 and 0.12) predicted LRS 2.5 years later after controlling for initial LRS and covariates. At follow-up, LRS onset was 2.0 times more likely and remission 1.8 times less likely in responders with initial PTSD than in responders without. Moreover, PTSD mediated, in part, the association between WTC exposures and development of LRS (p < .0001). Initial LRS and abnormal pulmonary function did not consistently predict PTSD onset. CONCLUSIONS: These analyses provide further evidence that PTSD is a risk factor for respiratory symptoms and are consistent with evidence implicating physiological dysregulation associated with PTSD in the development of medical conditions. If these effects are verified experimentally, treatment of PTSD may prove helpful in managing physical and mental health of disaster responders. |
World Trade Center disaster and sensitization to subsequent life stress: a longitudinal study of disaster responders
Zvolensky MJ , Farris SG , Kotov R , Schechter CB , Bromet E , Gonzalez A , Vujanovic A , Pietrzak RH , Crane M , Kaplan J , Moline J , Southwick SM , Feder A , Udasin I , Reissman DB , Luft BJ . Prev Med 2015 75 70-4 PURPOSE: The current study examined the role of World Trade Center (WTC) disaster exposure (hours spent working on the site, dust cloud exposure, and losing friend/loved one) in exacerbating the effects of post-disaster life stress on posttraumatic stress disorder (PTSD) symptoms and overall functioning among WTC responders. METHOD: Participants were 18,896 responders (8,466 police officers and 10,430 non-traditional responders) participating in the WTC Health Program who completed an initial examination between July, 2002 and April, 2010 and were reassessed an average of two years later. RESULTS: Among police responders, there was a significant interaction, such that the effect of post-disaster life stress on later PTSD symptoms and overall functioning was stronger among police responders who had greater WTC disaster exposure (beta's = .029 and .054, respectively, for PTSD symptoms and overall functioning). This moderating effect was absent in non-traditional responders. Across both groups, post-disaster life stress also consistently was related to the dependent variables in a more robust manner than WTC exposure. DISCUSSION: The present findings suggest that WTC exposure may compound post-disaster life stress, thereby resulting in a more chronic course of PTSD symptoms and reduced functioning among police responders. |
Post-disaster stressful life events and WTC-related posttraumatic stress, depressive symptoms, and overall functioning among responders to the World Trade Center disaster
Zvolensky MJ , Kotov R , Schechter CB , Gonzalez A , Vujanovic A , Pietrzak RH , Crane M , Kaplan J , Moline J , Southwick SM , Feder A , Udasin I , Reissman DB , Luft BJ . J Psychiatr Res 2014 61 97-105 BACKGROUND: The current study examined contributions of post-disaster stressful life events in relation to the maintenance of WTC-related posttraumatic stress, depressive symptoms, and overall functioning among rescue, recovery, and clean-up workers who responded to the September 11, 2001 World Trade Center (WTC) terrorist attacks. METHODS: Participants were 18,896 WTC responders, including 8466 police officers and 10,430 non-traditional responders (85.8% male; 86.4% Caucasian; Mage = 39.5, SD = 8.8) participating in the WTC Health Program who completed an initial examination between July, 2002 and April, 2010 and who were reassessed, on average, 2.5 years later. RESULTS: Path analyses were conducted to evaluate contributions of life events to the maintenance of WTC-related posttraumatic stress, depressive symptoms, and overall functioning. These analyses were stratified by police and non-traditional responder groups and adjusted for age, sex, time from 9/11 to initial visit, WTC exposures (three WTC contextual exposures: co-worker, friend, or a relative died in the disaster; co-worker, friend, or a relative injured in the disaster; and responder was exposed to the dust cloud on 9/11), and interval from initial to first follow-up visit. In both groups, WTC-related posttraumatic stress, depressive symptoms, and overall functioning were stable over the follow-up period. WTC exposures were related to these three outcomes at the initial assessment. WTC-related posttraumatic stress, depressive symptoms, and overall functioning, at the initial assessment each predicted the occurrence of post-disaster stressful life events, as measured by Disaster Supplement of the Diagnostic Interview Schedule. Post-disaster stressful life events, in turn, were associated with subsequent mental health, indicating partial mediation of the stability of observed mental health. CONCLUSIONS: The present findings suggest a dynamic interplay between exposure, post-disaster stressful life events, and WTC-related posttraumatic stress, depressive symptoms, and overall functioning among WTC disaster responders. |
Trajectories of PTSD risk and resilience in World Trade Center responders: an 8-year prospective cohort study
Pietrzak RH , Feder A , Singh R , Schechter CB , Bromet EJ , Katz CL , Reissman DB , Ozbay F , Sharma V , Crane M , Harrison D , Herbert R , Levin SM , Luft BJ , Moline JM , Stellman JM , Udasin IG , Landrigan PJ , Southwick SM . Psychol Med 2014 44 (1) 205-19 BACKGROUND: Longitudinal symptoms of post-traumatic stress disorder (PTSD) are often characterized by heterogeneous trajectories, which may have unique pre-, peri- and post-trauma risk and protective factors. To date, however, no study has evaluated the nature and determinants of predominant trajectories of PTSD symptoms in World Trade Center (WTC) responders. METHOD: A total of 10835 WTC responders, including 4035 professional police responders and 6800 non-traditional responders (e.g. construction workers) who participated in the WTC Health Program (WTC-HP), were evaluated an average of 3, 6 and 8 years after the WTC attacks. RESULTS: Among police responders, longitudinal PTSD symptoms were best characterized by four classes, with the majority (77.8%) in a resistant/resilient trajectory and the remainder exhibiting chronic (5.3%), recovering (8.4%) or delayed-onset (8.5%) symptom trajectories. Among non-traditional responders, a six-class solution was optimal, with fewer responders in a resistant/resilient trajectory (58.0%) and the remainder exhibiting recovering (12.3%), severe chronic (9.5%), subsyndromal increasing (7.3%), delayed-onset (6.7%) and moderate chronic (6.2%) trajectories. Prior psychiatric history, Hispanic ethnicity, severity of WTC exposure and WTC-related medical conditions were most strongly associated with symptomatic trajectories of PTSD symptoms in both groups of responders, whereas greater education and family and work support while working at the WTC site were protective against several of these trajectories. CONCLUSIONS: Trajectories of PTSD symptoms in WTC responders are heterogeneous and associated uniquely with pre-, peri- and post-trauma risk and protective factors. Police responders were more likely than non-traditional responders to exhibit a resistant/resilient trajectory. These results underscore the importance of prevention, screening and treatment efforts that target high-risk disaster responders, particularly those with prior psychiatric history, high levels of trauma exposure and work-related medical morbidities. |
Dimensional structure and course of post-traumatic stress symptomatology in World Trade Center responders
Pietrzak RH , Feder A , Schechter CB , Singh R , Cancelmo L , Bromet EJ , Katz CL , Reissman DB , Ozbay F , Sharma V , Crane M , Harrison D , Herbert R , Levin SM , Luft BJ , Moline JM , Stellman JM , Udasin IG , El-Gabalawy R , Landrigan PJ , Southwick SM . Psychol Med 2013 44 (10) 1-14 BACKGROUND: Post-traumatic stress disorder (PTSD) in response to the World Trade Center (WTC) disaster of 11 September 2001 (9/11) is one of the most prevalent and persistent health conditions among both professional (e.g. police) and non-traditional (e.g. construction worker) WTC responders, even several years after 9/11. However, little is known about the dimensionality and natural course of WTC-related PTSD symptomatology in these populations. METHOD: Data were analysed from 10 835 WTC responders, including 4035 police and 6800 non-traditional responders who were evaluated as part of the WTC Health Program, a clinic network in the New York area established by the National Institute for Occupational Safety and Health. Confirmatory factor analyses (CFAs) were used to evaluate structural models of PTSD symptom dimensionality; and autoregressive cross-lagged (ARCL) panel regressions were used to examine the prospective interrelationships among PTSD symptom clusters at 3, 6 and 8 years after 9/11. RESULTS: CFAs suggested that five stable symptom clusters best represent PTSD symptom dimensionality in both police and non-traditional WTC responders. This five-factor model was also invariant over time with respect to factor loadings and structural parameters, thereby demonstrating its longitudinal stability. ARCL panel regression analyses revealed that hyperarousal symptoms had a prominent role in predicting other symptom clusters of PTSD, with anxious arousal symptoms primarily driving re-experiencing symptoms, and dysphoric arousal symptoms primarily driving emotional numbing symptoms over time. CONCLUSIONS: Results of this study suggest that disaster-related PTSD symptomatology in WTC responders is best represented by five symptom dimensions. Anxious arousal symptoms, which are characterized by hypervigilance and exaggerated startle, may primarily drive re-experiencing symptoms, while dysphoric arousal symptoms, which are characterized by sleep disturbance, irritability/anger and concentration difficulties, may primarily drive emotional numbing symptoms over time. These results underscore the importance of assessment, monitoring and early intervention of hyperarousal symptoms in WTC and other disaster responders. |
Transmission of hepatitis B virus associated with assisted monitoring of blood glucose at an assisted living facility in New York State
Schaffzin JK , Southwick KL , Clement EJ , Konings F , Ganova-Raeva L , Xia G , Khudyakov Y , Johnson GS . Am J Infect Control 2012 40 (8) 726-31 ![]() BACKGROUND: Hepatitis B virus (HBV) transmission has been reported after patient-to-patient blood exposure during assisted monitoring of blood glucose (AMBG). Three assisted-living facility (ALF) residents who underwent AMBG developed acute HBV infection (HBVI) within 10 days. We investigated HBV transmission and implemented preventive measures. METHODS: A retrospective cohort study was conducted. Infection control practices were assessed. HBVI screening was conducted for all staff and epidemiologically linked residents. Viral DNA sequences were compared for a subset of isolates. RESULTS: Lancing devices and glucometers were shared among residents without proper sanitization. Serologic testing of all 34 residents with diabetes and 12 epidemiologically linked residents present during the exposure period detected 6 residents with diabetes with current HBVI and 4 residents with diabetes and 1 epidemiologically linked resident with previous HBVI. A cohort study of 32 individuals with diabetes identified AMBG as a significant risk factor for HBVI (relative risk, 6.7; 95% confidence interval, 1.7-26.3). Viral DNA sequences for 5 AMBG-exposed residents' isolates were identical, suggesting a common source. CONCLUSIONS: AMBG was significantly associated with HBVI in ALF residents with diabetes. Despite clear preventive recommendations, bloodborne pathogen transmission continues to occur in the setting of AMBG. Strengthening direct care provider, infection preventionist, and health department partnerships with ALFs is crucial to ensure safe AMBG practices and prevent HBV transmission. |
The burden of full and subsyndromal posttraumatic stress disorder among police involved in the World Trade Center rescue and recovery effort
Pietrzak RH , Schechter CB , Bromet EJ , Katz CL , Reissman DB , Ozbay F , Sharma V , Crane M , Harrison D , Herbert R , Levin SM , Luft BJ , Moline JM , Stellman JM , Udasin IG , Landrigan PJ , Southwick SM . J Psychiatr Res 2012 46 (7) 835-42 BACKGROUND: This study examined the prevalence, correlates, and perceived mental healthcare needs associated with subsyndromal PTSD in police involved in the World Trade Center (WTC) rescue and recovery effort. METHODS: A total of 8466 police completed an interview/survey as part of the WTC Medical monitoring and Treatment Program an average of four years after 9/11/2001. RESULTS: The past month prevalence of full and subsyndromal WTC-related PTSD was 5.4% and 15.4%, respectively. Loss of someone or knowing someone injured on 9/11 (odds ratios [ORs]=1.56-1.86), pre-9/11 stressors (ORs=1.30-1.50), family support (ORs=0.83-0.94), and union membership (ORs=0.50-0.52) were associated with both full and subsyndromal PTSD. Exposure to the dust cloud (OR=1.36), performing search and rescue work (OR=1.29), and work support (OR=0.89) were additionally associated with subsyndromal PTSD. Rates of comorbid depression, panic disorder, and alcohol use problems (ORs=3.82-41.74), and somatic symptoms and functional difficulties (ORs=1.30-1.95) were highest among police with full PTSD, with intermediate rates among police with subsyndromal PTSD (ORs=2.93-7.02; and ORs=1.18-1.60, respectively). Police with full and subsyndromal PTSD were significantly more likely than controls to report needing mental healthcare (41.1% and 19.8%, respectively, versus 6.8% in trauma controls). CONCLUSIONS: These results underscore the importance of a more inclusive and dimensional conceptualization of PTSD, particularly in professions such as police, as operational definitions and conventional screening cut-points may underestimate the psychological burden for this population. Accordingly, psychiatric clinicians should assess for disaster-related subsyndromal PTSD symptoms in disaster response personnel. |
Exposure, probable PTSD and lower respiratory illness among World Trade Center rescue, recovery and clean-up workers
Luft BJ , Schechter C , Kotov R , Broihier J , Reissman D , Guerrera K , Udasin I , Moline J , Harrison D , Friedman-Jimenez G , Pietrzak RH , Southwick SM , Bromet EJ . Psychol Med 2012 42 (5) 1069-79 BACKGROUND: Thousands of rescue and recovery workers descended on the World Trade Center (WTC) in the wake of the terrorist attack of September 11, 2001 (9/11). Recent studies show that respiratory illness and post-traumatic stress disorder (PTSD) are the hallmark health problems, but relationships between them are poorly understood. The current study examined this link and evaluated contributions of WTC exposures. METHOD: Participants were 8508 police and 12,333 non-traditional responders examined at the WTC Medical Monitoring and Treatment Program (WTC-MMTP), a clinic network in the New York area established by the National Institute for Occupational Safety and Health (NIOSH). We used structural equation modeling (SEM) to explore patterns of association among exposures, other risk factors, probable WTC-related PTSD [based on the PTSD Checklist (PCL)], physician-assessed respiratory symptoms arising after 9/11 and present at examination, and abnormal pulmonary functioning defined by low forced vital capacity (FVC). RESULTS: Fewer police than non-traditional responders had probable PTSD (5.9% v. 23.0%) and respiratory symptoms (22.5% v. 28.4%), whereas pulmonary function was similar. PTSD and respiratory symptoms were moderately correlated (r=0.28 for police and 0.27 for non-traditional responders). Exposure was more strongly associated with respiratory symptoms than with PTSD or lung function. The SEM model that best fit the data in both groups suggested that PTSD statistically mediated the association of exposure with respiratory symptoms. CONCLUSIONS: Although longitudinal data are needed to confirm the mediation hypothesis, the link between PTSD and respiratory symptoms is noteworthy and calls for further investigation. The findings also support the value of integrated medical and psychiatric treatment for disaster responders. |
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