A novel virus, rainbow trout orthomyxovirus (RbtOV), was isolated in 1997 and again in 2000 from commercially-reared rainbow trout (Oncorhynchus mykiss) in Idaho, USA. The virus grew optimally in the CHSE-214 cell line at 15 degrees C producing a diffuse cytopathic effect; however, juvenile rainbow trout exposed to cell culture-grown virus showed no mortality or gross pathology. Electron microscopy of preparations from infected cell cultures revealed the presence of typical orthomyxovirus particles. The complete genome of RbtOV is comprised of eight linear segments of single-stranded, negative-sense RNA having highly conserved 5' and 3'-terminal nucleotide sequences. Another virus isolated in 2014 from steelhead trout (also O. mykiss) in Wisconsin, USA, and designated SttOV was found to have eight genome segments with high amino acid sequence identities (89-99%) to the corresponding genes of RbtOV, suggesting these new viruses are isolates of the same virus species and may be more widespread than currently realized. The new isolates had the same genome segment order and the closest pairwise amino acid sequence identities of 16-42% with Infectious salmon anemia virus (ISAV), the type species and currently only member of the genus Isavirus in the family Orthomyxoviridae. However, pairwise comparisons of the predicted amino acid sequences of the 10 RbtOV and SttOV proteins with orthologs from representatives of the established orthomyxoviral genera and a phylogenetic analysis using the PB1 protein showed that while RbtOV and SttOV clustered most closely with ISAV, they diverged sufficiently to merit consideration as representatives of a novel genus. A set of PCR primers was designed using conserved regions of the PB1 gene to produce amplicons that may be sequenced for identification of similar fish orthomyxoviruses in the future.

OBJECTIVE: To provide a more comprehensive view than previously available of US physician preparedness for public health emergencies, this study examined physicians' assessments of their preparedness, training, participation in institutional activities, information practices, and experiences with patient education. Four kinds of public health emergencies were considered: natural disasters, major airborne infections, major foodborne illness outbreaks, and chemical, biological, radiological, nuclear, or explosives (CBRNE) incidents. METHODS: Between October 19, 2011, and January 11, 2012, researchers conducted a national poll among 1603 practicing physicians in a range of specialties in hospital and nonhospital settings. RESULTS: More than one-half of physicians felt prepared to handle a natural disaster, a major outbreak of an airborne infection, or a major foodborne illness outbreak, whereas one-third (34%) felt prepared to handle a CBRNE incident. About one-half of physicians (55%) had participated in training or a conference related to emergencies in the past 2 years. Sizable fractions of physicians were unaware of emergency response tools in their care setting. For example, nearly one-half in hospitals (44%) did not know whether their care setting had an emergency response plan, and less than one-quarter had participated in a drill using such a plan in the past 2 years. Less than one-third (31%) of physicians had signed up to receive alerts in the case of future emergencies. One in 10 reported sharing emergency information with patients at least "sometimes." CONCLUSIONS: Significant gaps remain in physician preparedness for public health emergencies, as well as in related training and participation in institutional activities. New efforts, with a focus on possible collaborations between public health institutions and health system leaders combined with effective use of online resources, are needed to bring more physicians on board and to develop relevant and useful key tools. New approaches, including those that rely on different types of care providers, may be needed to enhance patient education regarding emergency preparedness.

This study examines health effects resulting from landslides in Chuuk during Tropical Storm Chata'an in July 2002, and suggests strategies to prevent future mortality. In August 2002, we conducted a cross-sectional survey to identify risk factors for mortality during landslides, which included 52 survivors and 40 surrogates for 43 decedents to identify risk factors for death. Findings suggest that 1) females had a higher mortality rate from this event than males, and 2) children aged 5-14 years had a 10-fold increase in mortality when compared with annual mortality rates from all causes. Awareness of landslides occurring elsewhere and knowledge of natural warning signs were significantly associated with lower risks of death; being outside during landslides was not associated with reduced mortality. In Chuuk, improving communication systems during tropical storms and increasing knowledge of natural warnings can reduce the risk for mortality during landslides.