Watson D L, Franklin N A, Davies H I, Kettlewell P, Frost A J
CSIRO, Division of Animal health, Armidale, New South Wales.
Aust Vet J. 1990 Jan;67(1):6-8. doi: 10.1111/j.1751-0813.1990.tb07381.x.
Samples of mammary secretion were collected aseptically from 1093 ewes in 8 separate flocks. Most of the ewes were suckling lambs 4 to 6 weeks old. Standard bacteriological tests were carried out on the samples to identify the organisms involved in intramammary infections. Data on age, breed, lactational status and clinical status of the gland and its secretion were recorded at the time of sampling. The prevalence of intramammary infection was 14% of ewes (8% of glands). There was a tendency for prevalence of intramammary infection to be positively correlated with age of the ewe (two-year-old and six-year-old ewes had, respectively, 4.4% and 14.0% of glands infected). This relationship was highly significant for Border Leicester x Merino ewes. There were also significant differences in infection prevalence between breeds. infected glands had a higher prevalence of clinical abnormalities of udder, teat and secretion than did non-infected glands. Staphylococcus aureus was overwhelmingly the most frequently isolated bacterium being responsible for 40% of all intramammary infections.
从8个不同羊群的1093只母羊中无菌采集乳腺分泌物样本。大多数母羊正在哺育4至6周龄的羔羊。对样本进行了标准细菌学检测，以鉴定引起乳房内感染的病原体。在采样时记录了母羊的年龄、品种、泌乳状态以及乳腺及其分泌物的临床状态数据。乳房内感染的患病率为14%的母羊（8%的乳腺）。乳房内感染的患病率有与母羊年龄呈正相关的趋势（两岁和六岁母羊的感染乳腺分别为4.4%和14.0%）。这种关系在边区莱斯特×美利奴母羊中非常显著。不同品种之间的感染患病率也存在显著差异。与未感染的乳腺相比，感染的乳腺在乳房、乳头和分泌物的临床异常方面患病率更高。金黄色葡萄球菌是最常分离出的细菌，占所有乳房内感染的40%。
