Table 4.

Results of the histopathological examination of samples of the uterine walls of bitches with pyometra considering the microorganism and the size of the inflammatory response (in score).

Microorganism	Number of samples from which the MO was isolated	Score 0 (%)	Score 1 (%)	Score 2 (%)	Score 3 (%)	Score 4 (%)
E.coli	146	6.2	21.2	41.1	24.7	6.8
Gram negative bacteria (other than E. coli) 28	0	21.4	50	25	3.6
Gram positive bacteria	18	0	44.4	44.4	5.6	5.6
Association between E. coli and Gram positive bacteria	5	0	40	40	20	0
Absence of microorganism	3	33.3	0	33.3	0	33.3