University of Khartoum

Seasonal Variation of Incidences and Etiological Agents of Bovine Mastitis in Friesian Cattle in Sudan

Seasonal Variation of Incidences and Etiological Agents of Bovine Mastitis in Friesian Cattle in Sudan

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Title: Seasonal Variation of Incidences and Etiological Agents of Bovine Mastitis in Friesian Cattle in Sudan
Author: ElYas, Ibtisam
Abstract: The present study was conducted with the aim of comparing the incidences and the etiological agents of mastitis in Friesian cows, during summer and winter and among the different quarters of the studied cows in Sudan. The subclinical mastitis incidences were found to be higher than the clinical incidences of mastitis both during summer and winter. The highest subclinical incidences were observed in the left forequarters and the lower incidences were found in the left hind quarters. However the clinical incidences of the disease, revealed an opposite occurrence. Most of these incidences were due to Staphylococcus aureus (23.56%), followed by S. epidermidis (14.37%), Actinomyces pyogenes (9.77%), Escherichia coli (6.32%), Acinetobacter antratus (7.47%), Bacillus cereus (6.86%) and Bacillus subtilis (4.59%). Moreover it is clear that S. epidermidis, Bacillus subtilis and Bacillus spp. were isolated only during winter, while Klebsiella aerogenes, E. coli, A. pyogenes and yeast were found during summer survey only. The incidences of the isolated organisms were compared within the different quarters according to their location and their California Mastitis Test (CMT), during summer and winter. Similarly this study investigated the incidences of purulent and hemorrhagic mastitis and demonstrated the dry quarters, during both seasons. The present study concluded that isolation and specific identification of the etiological agents were still one of the most efficient procedures for the diagnosis of the disease (mastitis), since the pathogenic organisms were isolated from CMT- negative quarters (normal). This should be taken into account in hygiene training to ensure that dairy practitioners understand the role of mastitis pathogens, which can serve as foodborne disease and illness. Similarly special attention should be directed towards the broad environmental factors in order to improve and enhance proper preventive measures for the disease.
Description: This paper had been presented for promotion at the university of Khartoum. To get the full text please contact the other at Ibtisammohamed@hotmail.com
URI: http://hdl.handle.net/123456789/6925
Date: 2006


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