Identification of avian coronavirus in wild aquatic birds of the central and eastern USA.
Coronaviruses (CoVs) are worldwide in distribution, highly infectious, and difficult to control because of their extensive genetic diversity, short generation time, and high mutation rates. Genetically diverse CoVs have been reported from wild aquatic birds that may represent a potential reservoir for avian CoVs as well as hosts for mutations and recombination events leading to new serotypes or genera. We tested 133 pooled samples representing 700 first-passage (in eggs) and 303 direct cloacal swab transport media samples from wild aquatic birds in the US that were avian influenza-negative. We isolated RNA from frozen samples and performed reverse transcriptase-PCR using a published universal CoV primer set. Of the samples tested, one from a Ruddy Turnstone (Arenaria interpres) was positive for CoV, showing nucleotide sequence similarity to a duck coronavirus (DK/CH/HN/ZZ2004). These data indicate a possible low prevalence of CoVs circulating in wild aquatic birds in the eastern half of the US.
1 Department of Population Health, College of Veterinary Medicine, Poultry Diagnostic and Research Center, The University of Georgia, 953 College Station Rd., Athens, Georgia 30602, USA.
Brian J
BJ
Jordan
Deborah A
DA
Hilt
Rebecca
R
Poulson
David E
DE
Stallknecht
Mark W
MW
Jackwood
D000818:Animals; D000835:Animals, Wild; D001715:Bird Diseases / Q000453:epidemiology / Q000821:virology*; D001717:Birds; D017934:Coronavirus / Q000145:classification / Q000302:isolation & purification*; D018352:Coronavirus Infections / Q000453:epidemiology / Q000662:veterinary*; D014481:United States / Q000453:epidemiology
Cloacal swab; RT-PCR; duck coronavirus; reservoir; wild bird