求翻译：当鸡群出现某些临床症状，比如食欲下降、脱水、棕色痢疾、跛腿、发烧、不同的死亡率、耳部发黑和眼圈血肿等，可能是几种病毒性、细菌性疾病混合感染，那鸡群群体免疫力明显下降，如果不采取措施，则死亡率会明显上升，产蛋也随之下降，蛋品质也得不到保障。是什么意思？

When the flocks some clinical symptoms, such as decreased appetite, dehydration, brown dysentery, lameness, fever, different mortality, ear black and eye socket hematoma, etc., may be mixed infection of several viruses, bacterial diseases, that flock herd immunity is decreased, and if measures are n

When the chicken farm with certain clinical symptoms, such as appetite, diarrhea, dehydration, brown legs, fever, almost all of the different mortality rates, ears, black eyes hematomas, and could be one of several viral and bacterial diseases, mixed infection that chicken farm herd immunity has bee

When the chicken group has certain clinical symptoms, for instance the appetite drops, the dehydration, brown dysentery, is lame, has a fever, the different mortality rate, the ear department becomes dark with the eye socket haematoma and so on, possibly is several kind of virulence, the bacterial d

Dang chicken group appears some clinical symptoms, such as appetite declined, and dehydration, and Brown dysentery, and lame legs, and fever, and different of mortality, and ear Department blackened and eye hematoma,, may is several virus sexual, and bacteria sexual disease mixed infection, that chi

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