Factors influencing the prevalence of subclinical mastitis in lactating dromedary camels in Riyadh Region,Saudi Arabia |
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Authors: | Aljumaah Riyadh S Almutairi Faris F Ayadi Moez Alshaikh Mohammad A Aljumaah Ali M Hussein Mansour F |
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Institution: | 1.Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, P. O. Box 2460, Riyadh, 11451, Saudi Arabia ;2.Center of Excellence in Biotechnology Research, P. O. Box 2455, Riyadh, 11451, Saudi Arabia ;3.Département de Biotechnologie Animale, Institut Supérieur de Biotechnologie de Beja, Université de Jendouba, B.P. 382, Av. Habib Bourguiba, 9000, Beja, Tunisia ;4.Department of Quantitative Analysis, College of Business Administration, King Saud University, Riyadh, P. O. Box 2459, Riyadh, 11451, Saudi Arabia ; |
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Abstract: | The purpose of this study was to determine the prevalence of subclinical mastitis in camels in Riyadh, Saudi Arabia and the
factors influencing its incidence. A total of 740 quarter milk samples were collected from 47 camel herds belonging to Majahim, Maghatir, Shu’l, and Sufer breeds. California mastitis test (CMT) was used as a screening test for subclinical mastitis. Samples giving negative or
trace CMT scores (0) were assigned to healthy quarters, while those giving positive scores of 1+ to 3+ were assigned to subclinically
affected quarters. Logistic regression was used to assess the association of breed, parity, and stage of lactation with the
prevalence of subclinical mastitis. Milk fat, protein, lactose, solid nonfat percentages and Na, Ca, and K concentrations
were compared in CMT-positive versus healthy quarters. One third (33%) of tested quarters had subclinical mastitis based on
CMT. The estimated probability of subclinical mastitis with the combined effects of breed, parity, and stage of lactation
ranged from 15.8% to 54.6%. The risk of subclinical mastitis increased significantly with parity and with the early stage
of lactation. The Shu’l breed had significantly higher prevalence of subclinical mastitis than other breeds. Significant decreases
in protein, lactose, and solid nonfat, Ca and K concentrations and increase in Na concentrations were associated with subclinical
mastitis. In conclusion, subclinical mastitis is prevalent in Saudi camels, and its incidence is influenced by breed, parity,
and stage of lactation. |
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