. . . "Prevalence of Tumours and Antibodies against Leukosis and Sarcoma Viruses from Subgroups A and B in Layers" . . "Prevalence of Tumours and Antibodies against Leukosis and Sarcoma Viruses from Subgroups A and B in Layers"@en . "Prevalence n\u00E1dor\u016F a protil\u00E1tek proti leuk\u00F3zo-sarkomov\u00FDm vir\u016Fm podskupin A a B u nosnic"@cs . "538290" . . "Prevalence of Tumours and Antibodies against Leukosis and Sarcoma Viruses from Subgroups A and B in Layers" . "Prevalence n\u00E1dor\u016F a protil\u00E1tek proti leuk\u00F3zo-sarkomov\u00FDm vir\u016Fm podskupin A a B u nosnic"@cs . . "5"^^ . "74" . "Halouzka, Roman" . "Kvapil, Pavel" . "16170" . "Viruses belonging to the leukosis/sarcoma group represent a frequent cause of neoplasm inpoultry. The aim of this study was to assess the frequency of tumours and the prevalence ofantibodies against leukosis/sarcoma viruses from subgroups A and B in laying hens of domesticfowl (Gallus gallus f. domestica), both in parents and production flocks from the Czech Republic.A total of 91 flocks of laying hens from three different slaughterhouses were examined for thepresence of tumours. The occurrence of neoplastic lesions was found to be low. Although tumoursoccurred in 82 flocks (90.1%), their incidence in 62 (68.1%) flocks was below 0.5%, and it onlyexceeded one percent in 3 flocks (3.3%). 9 flocks (9.9%) had no tumours. In order to determine thespectrum of the tumours, 14 randomly collected samples were histologically examined. Thetumours found in hens at the end of the laying period showed varied histogenesis (five cases ofpancreatic adenocarcinoma, three cases of adenocarcinoma of the oviduct, two case"@en . "Prevalence of Tumours and Antibodies against Leukosis and Sarcoma Viruses from Subgroups A and B in Layers"@en . "575-579" . . "1" . "1"^^ . . . "0001-7213" . . . "Z(MSM 161700002)" . "4"^^ . . "Acta veterinaria" . "Viry leuk\u00F3zo-sarkomov\u00E9ho komplexu jsou \u010Dast\u00FDmi p\u016Fvodci n\u00E1dorov\u00FDch onemocn\u011Bn\u00EDu dr\u016Fbe\u017Ee. C\u00EDlem t\u00E9to studie bylo zjistit \u010Detnost v\u00FDskytu n\u00E1dor\u016F a prevalenci protil\u00E1tek protileuk\u00F3zo-sarkomov\u00FDm vir\u016Fm podskupiny A a B u nosnic kura dom\u00E1c\u00EDho (Gallus gallus f.domestica) rodi\u010Dovsk\u00FDch a u\u017Eitkov\u00FDch chov\u016F v \u010Cesk\u00E9 republice. P\u0159i\u00EDtomnost n\u00E1dor\u016F bylasledov\u00E1na na por\u00E1\u017Ek\u00E1ch u celkem 91 chov\u016F nosnic a bylo zji\u0161t\u011Bno, \u017Ee prevalence n\u00E1dorov\u00FDch zm\u011Bn je n\u00EDzk\u00E1. N\u00E1dory se vyskytly v 82 chovech (90,1 %), ale v 62 chovech (68,1 %) incidence nep\u0159ekro\u010Dila p\u016Fl procenta a pouze ve 3 chovech (3,3 %) byla vy\u0161\u0161\u00ED ne\u017E jedno procento. V 9 chovech (9,9 %) se n\u00E1dory nevyskytovaly v\u016Fbec. Pro zji\u0161t\u011Bn\u00ED spektra vyskytuj\u00EDc\u00EDch se n\u00E1dor\u016F bylo histopatologicky vy\u0161et\u0159ieno 14 n\u00E1hodn\u011B odebran\u00FDch vzork\u016F.N\u00E1dory vy\u0161et\u0159en\u00E9 u nosnic na konci sn\u00E1\u0161ky byly histogeneticky pestr\u00E9. Zahrnovaly p\u011Btadenokarcinom\u016F pankreatu, t\u0159ii adenokarcinomy vejcovodu, dva leiomyomy z\u00E1v\u011Bsuvejcovodu, po jednom adenokarcinom vaje\u010Dn\u00EDku a lymfom st\u0159ieva. Byly zaznamen\u00E1ny i dva p\u0159\u00EDpa"@cs . "Tom\u00E1\u0161ek, Old\u0159ich" . . "[5C9AEBD6EDDF]" . "Kul\u00EDkov\u00E1, Libu\u0161e" . "RIV/62157124:16170/05:00000408!RIV06-MSM-16170___" . "CZ - \u010Cesk\u00E1 republika" . "RIV/62157124:16170/05:00000408" . . . "Viruses belonging to the leukosis/sarcoma group represent a frequent cause of neoplasm inpoultry. The aim of this study was to assess the frequency of tumours and the prevalence ofantibodies against leukosis/sarcoma viruses from subgroups A and B in laying hens of domesticfowl (Gallus gallus f. domestica), both in parents and production flocks from the Czech Republic.A total of 91 flocks of laying hens from three different slaughterhouses were examined for thepresence of tumours. The occurrence of neoplastic lesions was found to be low. Although tumoursoccurred in 82 flocks (90.1%), their incidence in 62 (68.1%) flocks was below 0.5%, and it onlyexceeded one percent in 3 flocks (3.3%). 9 flocks (9.9%) had no tumours. In order to determine thespectrum of the tumours, 14 randomly collected samples were histologically examined. Thetumours found in hens at the end of the laying period showed varied histogenesis (five cases ofpancreatic adenocarcinoma, three cases of adenocarcinoma of the oviduct, two case" . . "Avian leukosis; enzyme-linked immunosorbent assay; poultry; histology"@en .