Schistosomiasis Haematobium, Corsica, France
نویسندگان
چکیده
Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 20, No. 9, September 2014 1595 A phylogenetic tree constructed by using the entire sequence showed that all PorCoV HKU15 strains from the United States clustered together in 1 clade of the genus Deltacoronavirus with HKU15-155 and HKU15-44 (online Technical Appendix Figure, panel A, http://wwwnc.cdc.gov/EID/ article/20/9/14-0756-Techapp1.pdf). This finding indicates that 1 genotype of PorCoV HKU15 is currently circulating in multiple US states. This result was further supported by phylogenetic trees constructed by using the full-length amino acids of spike and nucleocapsid proteins (online Technical Appendix Figure, panels B, C). Because of limitation of the samples received, only a partial genome sequence was determined for strain MN3092 from Minnesota. However, on the basis of the spike and nucleocapsid protein sequence analyses, it is highly likely that the entire genome of the Minnesota strain is genetically identical to that of the other 8 strains (online Technical Appendix Figure, panels B, C). In addition to the 9 states reported in this study, Iowa has also had a recent detection of PorCoV HKU15 (3). Thus, PorCoV HKU15 has been detected in 10 of the 50 US states, and those 10 states mainly cluster in the midwestern United States (Figure). As with data collected for porcine epidemic diarrhea outbreaks by the US National Animal Health Laboratory Network (http://www.nahln. org/default/), data collected on the geographic location and numbers of PorCoV HKU15 cases is also required to be reported weekly. Earlier reports support avian coronaviruses as the gene source for Deltacoronavirus spp. (1,4). To confirm this, surveillance for PorCoV should be carried out among birds. Moreover, effective control strategies, including vaccine development, should be in place for prevention and control of infections caused by PorCoV HKU15. Acknowledgments We acknowledge and appreciate the excellent technical help provided by Jason Herr and Kerri Lawrence.
منابع مشابه
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