Milk hygiene and udder health in the periurban area of Hamdallaye, Niger |
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Authors: | A Harouna M Zecchini C Locatelli L Scaccabarozzi C Cattaneo A Amadou V Bronzo H Marichatou P J Boettcher M G Zanoni L Alborali P Moroni |
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Institution: | 1. Department of Animal Science, University of Milan, Via Celoria 10, 20133, Milan, Italy 2. Department of Veterinary Pathology, Hygiene and Public Health, University of Milan, via Celoria 10, 20133, Milan, Italy 4. Project of Safety of Niamey Periurban Farming and Agriculture, PSEAU CNE 3011, BP: 13729, Niamey, Niger 5. Department of Animal Productions, Faculty of Agriculture, University of Niamey, BP: 10960, Niamey, Niger 3. Institute of Agricultural Biology and Biotechnology (IBBA), Milan, Italy 6. Istituto Zooprofilattico of Lombardia and Emilia Romagna, Brescia, 25100, Italy
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Abstract: | 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 × 103 cells/ml; CNS, 447 × 103 cells/ml; environmental microorganisms, 407 × 103 cells/ml; and non-infected, 262 × 103 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. |
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Keywords: | Dairy cattle Mastitis Somatic cells Zebu |
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