牛支原体，慢性肺炎和关节炎，犊牛
Photograph of a steer affected with Mycoplasma bovis infection, resulting in polyarthritis and chronic pneumonia. Note the swollen carpi and tarsi and the abnormal stance.
Courtesy of Dr. John Campbell.
Photograph of a steer affected with Mycoplasma bovis infection, resulting in polyarthritis and chronic pneumonia. Note the swollen carpi and tarsi and the abnormal stance.
Courtesy of Dr. John Campbell.
