Weight and Shape of the Canine Uterus with Pyometra Experimentally Reproduced by Escherichia coli Inoculated into the Uterus with Its Cervix Ligated

A total of 33 bitches with experimentally induced pyometra were examined. When the uterus was in the stage from proestrus to diestrus, it was heavier than that in any other stages. It was smaller than the uterus spontaneously affected with pyometra.The uterus did not show characteristic shapes depending on a given in the estrous cycle. It was most frequently of segmental shape in the stage from proestrus to diestrus and pear-shaped in the postpartum stage. Cystic endometrial hyperplasia which ordinarily could be seen in spontaneous disease was reproduced in only one bitch that was in the diestrous stage.