Enterovirus 68 historical perspective
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Overview
Human enterovirus 68 (EV-D68) was initially isolated in 1962 from samples of 4 hospitalized children presenting for pneumonia and bronchiolitis in California. It is a rare disease that has recently become more clinically evident. The most recent outbreak occurred in USA on September 2014; it involved 10 states including Colorado, North Carolina, Georgia, Ohio, Iowa, Illinois, Missouri, Kansas, Oklahoma, and Kentucky.
Historical Perspective
- Human enterovirus 68 (EV-D68) was initially isolated in 1962 from samples of 4 hospitalized children presenting for pneumonia and bronchiolitis in California.[1]
- While early descriptions of of EV-D68 identified the virus as acid resistant, newer reports refuted earlier findings and consistently confirmed the virus's acid sensitivity.[2][3][4]
- Prior to 2005, reports of EV-D68 infections were very limited. Only 26 cases of verified EV-D68 infection were documented between 1970 and 2005. EV-D68 is thus considered one of the rarest infectious enteroviruses, representing approximately 0.1% of all enterovirus isolates in that time frame.
- Over the past few years, outbreaks of EV-D68 have been documented in Japan, the Philippines, the Netherlands, and also in several clusters in the USA.[5]
- In September 2014, there was an outbreak of EV-D68 in the US with clusters reported in 10 states including Colorado, North Carolina, Georgia, Ohio, Iowa, Illinois, Missouri, Kansas, Oklahoma, and Kentucky.
- Analysis of VP1 Genes of EV-D68 has helped identify three distinct clades namely A, B, and C from the prototype EV-D68 Fermon strain. Two sub-clades (B1 and B2) were identified, with most 2014 EV-D68 outbreak strains belonging to sub-cluster B2b2 (one of the two emerging clusters within sub-clade B2).
- All three clades of EV-D68 have been reported in China, Italy, Japan, Netherlands, and the USA
- In 2011, China and Phillipines was affected by the first EV-D68 sub-clade B2 strains. Sub-clade B1 contained the two strains from Ontario and three USA strains from the 2014 outbreak.
References
- ↑ Schieble, JH.; Fox, VL.; Lennette, EH. (1967). "A probable new human picornavirus associated with respiratory diseases". Am J Epidemiol. 85 (2): 297–310. PMID 4960233. Unknown parameter
|month=ignored (help) - ↑ "A collaborative report: rhinoviruses--extension of the numbering system". Virology. 43 (2): 524–6. 1971. PMID 5543842.
- ↑ Savolainen C, Blomqvist S, Mulders MN, Hovi T (2002). "Genetic clustering of all 102 human rhinovirus prototype strains: serotype 87 is close to human enterovirus 70". J Gen Virol. 83 (Pt 2): 333–40. PMID 11807226.
- ↑ Ishiko H, Miura R, Shimada Y, Hayashi A, Nakajima H, Yamazaki S; et al. (2002). "Human rhinovirus 87 identified as human enterovirus 68 by VP4-based molecular diagnosis". Intervirology. 45 (3): 136–41. doi:65866 Check
|doi=value (help). PMID 12403917. - ↑ Tokarz R, Firth C, Madhi SA, Howie SR, Wu W, Sall AA; et al. (2012). "Worldwide emergence of multiple clades of enterovirus 68". J Gen Virol. 93 (Pt 9): 1952–8. doi:10.1099/vir.0.043935-0. PMC 3542132. PMID 22694903.