McDonald J S, Anderson A J
Am J Vet Res. 1981 Feb;42(2):229-31.
The nonlactating mammary gland was experimentally inoculated with Escherichia coli. During the first half of the nonlactating period, 32% of 34 inoculated glands were temporarily infected. All intramammary infections were eradicated by the cow without therapy and no signs of mastitis were observed. During the 30 days before parturition occurred, 88% of 42 inoculated glands in the cows became infected. Twenty-three intramammary infections were eradicated by the cow and infection in 14 glands persisted after parturition occurred. Peracute toxic mastitis occurred in those cows with infected glands.
用大肠杆菌对非泌乳期乳腺进行实验性接种。在非泌乳期的前半期，34个接种乳腺中有32%被暂时感染。所有乳房内感染均被奶牛自行清除，未观察到乳腺炎迹象。在分娩前的30天内，奶牛中42个接种乳腺中有88%被感染。23例乳房内感染被奶牛清除，14个乳腺在分娩后仍有感染。那些乳腺感染的奶牛发生了超急性中毒性乳腺炎。
