Last data update: May 06, 2024. (Total: 46732 publications since 2009)
Records 1-2 (of 2 Records) |
Query Trace: Perelygina LM[original query] |
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Improved diagnostic and multiplex RT-qPCR for detecting rubella viral RNA.
Chen MH , Abernathy E , Icenogle JP , Perelygina LM . J Virol Methods 2022 306 114555 An examination of the nucleic acid sequence alignment of 48 full-length rubella virus genomes revealed that the 5' terminus of the genome is more conserved than the commonly used detection windows for rubella virus RNA located in the E1 protein coding region, suggesting that the 5' terminus could be a target for improving detection of all rubella virus genotypes. Two candidate primer sets were tested and the window between nucleotides (nts) 98 and 251 was found to have the greatest analytical sensitivity for detection of different genotypes. The new method had a limit of detection of four copies of rubella RNA per reaction with high specificity. The average coefficient variation of Ct was 2.2%. Concordance between the new method and currently used method, based on testing 251 clinical specimens collected from a rubella outbreak, was 99.4%. The assay was further improved upon by the incorporation of detection of both rubella virus RNA and mRNA from a cellular reference gene in a multiplex format. The multiplex format did not reduce the sensitivity or the reproducibility of rubella RNA detection and, of 60 specimens tested, the concordance between the single target and multiplex assays was 85.0%. To assess the utility of the multiplex assay for molecular surveillance, 62 rubella IgM positive serum samples from a rubella outbreak were tested, and eleven tested positive using the multiplex method while none were positive using the method targeting E1. These results show that the assay based on the new detection window near the 5' terminus of the genome can improve the detection of rubella virus for the purpose of molecular surveillance and case confirmation, with the added benefit of improved efficiency due to multiplexing. |
Notes from the field: Monkey bite in a public park and possible exposure to herpes B virus - Thailand, 2018
Wu AC , Rekant SI , Baca ER , Jenkins RM , Perelygina LM , Hilliard JK , Schmid DS , Leman RF . MMWR Morb Mortal Wkly Rep 2020 69 (9) 247-248 On January 7, 2019, the Oregon Public Health Division (OPHD) was contacted by a local health department regarding an Oregon teen who, on December 24, 2018, was bitten by a macaque monkey (Figure) in a public park in Phuket, Thailand. The bleeding wound was immediately rinsed with bottled water without soap. Subsequently, hotel staff members applied a topical pain reliever. The following day, the teen went to a local clinic in Thailand and received the first dose of rabies postexposure prophylaxis vaccine; rabies immune globulin was not administered. She received 2 additional doses of rabies vaccine while in Thailand. | | On January 5, 2019, the patient left Thailand and was evaluated by a physician in Oregon on January 7. The physician contacted the local health department, seeking guidance about when to administer the final dose of rabies vaccine. Upon learning about the macaque bite, the local health department contacted OPHD, where staff members expressed concern about possible exposure to Macacine herpesvirus 1 (B virus). This virus, commonly found in macaques,* can, in rare cases, cause severe encephalitic infection in humans if not treated promptly (1). The case fatality rate of untreated B virus infection approaches 80% (2). OPHD contacted CDC, and the National B Virus Resource Center (NBVRC) in Atlanta, Georgia, to discuss testing.† |
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