题目内容

下列属于病毒性关节炎特征的是（）。

A. 病鸡跛行。
B. 跗关节肿大，呈墨绿色，按压有波动感。
C. 趾屈肌腱和趾伸肌腱肿胀、出血。
D. 跗关节内常含有枯草色或带血色渗出物，滑膜常有出血点。

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