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Relationship between somatic cell count in milk and intramammary infection in Egyptian buffaloes
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Abstract: This study aimed to investigate the relationship between somatic cell count (SCC) in milk and intramammary infection (IMI) in Egyptian buffaloes as well as to assess SCC threshold values for detection of subclinical mastitis. A total number of 339 quarter milk samples were collected from 113 milking buffaloes raised in Mehalet Mousa experimental farm belonging to Animal Production Research Institute, Agriculture Research Center, Egypt. Milk samples were taken (aseptically from each quarter) in separate sterile tubes for bacteriological analysis and determination of (SCC) using the fluoro-opto-electronic method.
Average of log SCC in milk samples from non infected and infected quarters were 4.82±0.09 (66 x 103 cells/ml) and 4.98±0.08 (96 xl03 cells/ml), respectively. Log SCC in milk was significantly (P <0.01) affected by IMI, parity of the animal and milking type (P < 0.05) whereas, no significant differences were attributed to quarter site or season of milking. Least square means of log SCC in milk samples collected during hot and cold seasons were 4.63± 0.07 and 4.76±0.07, respectively. Log SCC was insignificantly higher in the rear quarters than that in the front ones.
The major pathogens that are commonly responsible for clinical infection were Staph. aureus (22.42%), Strep, agalactea, (5.6%) Strep. disagalactea (22.71%) Strep.uberis (2.65%) and Coliform spp. (5.9%).
The minor pathogens were CNS (13.57%), Corynbacteria spp. (21.83%) and Bacillus spp. (12.98%) Infected milk samples represented 62.24% of the total collected samples whereas, 37.76% of them were non infected. The highest log SCC in samples with IMI was observed in that containing a single major pathogen (4.83 ±0.08) or those containing two major plus one minor pathogen (4.89 ±0.12). Samples that contained a single minor pathogen had the least log SCC (4.52±0.09). A threshold of 50,000 cells /ml of milk of buffaloes was shown to have a high sensitivity, specificity and correctly classified samples for identifying IMI.
KEYWORDS: Buffaloes. intramammary infection, somatic cell count.
Abbreviations: SCC= somatic cell counts, IMI= intramammary infection, log SCC= log somatic cell counts
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| Publication year |
2009
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| Pages |
197-207
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| Availability location |
معهد بحوث ا لانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
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| serial title |
Journal of the Egypian Veterniary Medical Association
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| Author(s) from ARC |
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Milk.
Somatic cell count.
Water buffaloes.
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| Proposed Agrovoc |
intramammary infection;
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| Publication Type |
Journal
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