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Milk hygiene and udder health in the periurban area of Hamdallaye, Niger

机译：尼日尔哈姆达莱周边地区的牛奶卫生和乳房健康

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摘要

The prevalence of intra-mammary infections in dairy herds was studied in Hamdallaye, Niger. A total of 956 milk samples were collected in 2007 from 239 lactating cows of four local breeds in eight traditional herds; the first sampling was undertaken in the dry season at morning milking, and the second in the rainy season at evening milking. Staphylococcus aureus, Coagulase-Negative Staphylococci (CNS) and environmental microorganisms were detected in significantly (p < 0.05) more samples in the rainy season, 55.2%, than in the dry season, 27.1%. Statistically significant (P < 0.05) differences in prevalence were observed among herds and according to lactation number. Infections were assigned to four classes, according to the major pathogen, and the respective mean somatic cell counts during the dry season were: S. aureus, 775 x 10(3) cells/ml; CNS, 447 x 10(3) cells/ml; environmental microorganisms, 407 x 10(3) cells/ml; and non-infected, 262 x 10(3) cells/ml. Most of the tested strains were sensitive to antibiotics, and selected strains of S. aureus (n = 15) were negative to the multiplex PCR tests for production of enterotoxins.
机译：在尼日尔的Hamdallaye对奶牛群中的乳内感染患病率进行了研究。 2007年，从八种传统畜群的四个地方品种的239头泌乳牛中收集了956份乳样;第一次采样是在干燥季节的早晨挤奶，第二个采样是在雨季的晚上挤奶。金黄色葡萄球菌，凝固酶阴性葡萄球菌（CNS）和环境微生物的检出率在雨季（55.2％）比旱季（27.1％）多得多（p <0.05）。根据泌乳次数，观察到牛群之间的流行率具有统计学意义（P <0.05）。根据主要病原体，将感染分为四类，在干燥季节，各自的平均体细胞计数为：金黄色葡萄球菌，775 x 10（3）细胞/ ml; CNS，447 x 10（3）细胞/ ml;环境微生物，407 x 10（3）细胞/ ml;和未感染的262 x 10（3）细胞/ ml。多数测试菌株对抗生素敏感，而选定的金黄色葡萄球菌菌株（n = 15）对产生肠毒素的多重PCR检测呈阴性。

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