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- W2022169711 abstract "Two genetically different isolates of chicken astrovirus (CAstV), named CAstV612 and CAstV11672, which share low levels of antigenic relatedness in cross-indirect immunofluorescence (IIF) tests, have been identified recently. In the present study, separate IIF tests for detecting antibodies to the CAstV612 and CAstV11672 isolates have been used to determine the seroprevalences of CAstV infections in four generations of flocks involved in broiler chicken production. CAstV antibodies were detected in 78% (73% CAstV612; 46% CAstV11672) of serum samples from UK broiler flocks and in all 10 flocks tested, indicating that infections were very common. Twenty-three (96%) out of 24 and 26 (93%) out of 28 broiler parent flocks, aged 23 to 26 weeks from three UK organizations, were positive for antibody to CAstV612 and CAstV11672, respectively. Of 718 samples tested from these parent flocks, 415 (53%) were positive for either CAstV612 or CAstV11672 antibody. CAstV infections were also widespread in parent flocks, with screening of pooled serum samples showing that antibodies to both CAstVs were detected in flocks from seven other UK poultry organizations and in flocks from eight other European countries. The seropositivities for CAstVs were substantially less in grandparent (28%) and great grandparent (21%) flocks. Overall, higher seropositivities were observed for CAstV612 than for CAstV11672 in broiler, parent, grandparent and great-grandparent flocks. A limited study of 99 sera from 10 turkey breeder flocks showed low-level seropositivities for CAstV612 (9%) and CAstV11672 (2%), indicating that turkeys were infected with CAstVs or antigenically related viruses." @default.
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- W2022169711 date "2009-08-01" @default.
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- W2022169711 title "A seroprevalence investigation of chicken astrovirus infections" @default.
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- W2022169711 doi "https://doi.org/10.1080/03079450903055421" @default.
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