美国七彩山鸡传染性法氏囊病及其并发感染

Infectious Bursa Disease and Complicated Infection in American Pheasant

1998年贵阳地区两个珍禽养殖场(A场和B场)的七彩山鸡爆发一种以急性死亡、法氏囊肿大为特征的传染病。A场无并发感染,死亡率为11.4%,死亡高峰出现在第5d;B场由于致病性链球菌的混合感染,死亡率上升到50%,死亡高峰提前到第3d,剖解病变更加复杂化,该场的致病性链球菌是加剧本病高死亡率和严重出血性素质的真正原因。另对两场的鸡新城疫(ND)和鸡减蛋综合症(EDS)血清效价测定结果表明,部分鸡群的ND免疫不合格,鸡群曾被EDS病毒感染。

An infections disease broke out at two pheasantries (A and B farm) on May 1998 in the suburbs of Guiyang city, which was characterized with acute mortality and swllen bursa. Comlicated infection was not observed at A farm and the mortality reached 11.4% with a peak at the 5th day. While at B farm, co infection caused by pathogenic streptocoui resulted in high motality of 50% the death peak occurred at the 3th day and the pathological lesions became more sophisticated. The antibody titers against new castle disease (ND) and egg drop syndrome (EDS) had been determined by serological reaction at bath farms. The results showed that ND immunity didn't establish in part of flocks and some of them suffered from EDS virues.