3Miller-Liebl D, Fayer-Hosken R, Caudle A, et al. Reproductive tract diseases that cause infertility in the bitch[J]. Vet- Med, 1994,89 : 1047-1054.
4Arora N, Sandford J, Browning G F, et al. A model for cystic endometrial hyperplasia/pyometra complex in the bitch[J]. Theriogenology, 2006,66: 1530-1536.
5Smith F O. Canine pyometra[J]. Theriogenology, 2006,66: 610-612.
6叶俊华.犬繁育技术大全[M].辽宁:辽宁科学技术出版社,2002:44.
7Nomura K, Funahashi H, Shimada Y. Experimental production of canine pyometra by inoculation with Escherichia coli into the uterus with cervical not ligated[J]. Vet Med Assoc, 1988,41:95-99.
8Tsumagari S, Ishinazaka T, Kamata H, et al. Induction of canine pyometra by inoculation of Escherichia coli into the uterus and its relationship to reproductive features[J]. Anita Reprod Sci, 2005,87: 301-308.
9Sugiura K, Nishikawa M, Ishiguro K, et al. Effect of ovarian hormones on periodical changes in immune resistance associated with estrous cycle in the beagle bitch[J]. Immunobiology, 2004,209 : 619-627.
10Erlandsson M C, Ohlsson C, Gustafsson J A, et al. Role of oestrogen receptors a and b in immune organ development and in oestrogen-mediated effects on thymus [J]. Immunology, 2001,103:17-25.
