Figure 1.

Observation, ultrasound, and microscopic imaging of endometritis and bacterial mixed infection of representative examples. Mildly diseased cows had red and swollen vulvae (A), and the vaginal discharge was slightly turbid and could not be drawn into filamentous mucus (B). A large amount of white (C) or yellow (D) purulent secretion with severe malodorous smell could be observed in the vaginal opening of severely diseased cows (E–H). The uterus of diseased cows showed abnormal ultrasound imaging with hyperechoic areas (I), while healthy or cured cows had clear black background (J). (K) Mixed infection with Escherichia and Streptococcus (magnification = 100×). (L) Mixed infection with Escherichia and Staphylococcus (magnification = 100×).