Effect of subclinical mastitis on milk yield and milk composition parameters in dairy camels Study of subclinical mastitis in dairy camels

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Leyla Hadef
Brahim Hamad
Hebib Aggad


This study investigated the effects of subclinical mastitis on milk yield and milk composition parameters in dairy camels. A total of 140 camel milk samples were collected from multiparous she-camels (7–10 years old) and were subjected to bacteriological culture; 76 samples displayed subclinical mastitis and 64 samples were healthy. Furthermore, the samples were analyzed via standard procedures to determine the yield and composition parameters of the milk such as pH, electrical conductivity, protein, fat, lactose, and ash contents. The results showed that the milk yield was significantly decreased (p< 0.05) in infected animals compared to healthy animals (3.80 vs 4.32 L∙day-1). Moreover, compared to the values observed in healthy milk samples, milk from animals with subclinical mastitis showed significantly decreased (p< 0.05) protein (3.33 vs 3.40%) and fat (3.67 vs 3.74%) contents. However, no significant changes (p> 0.05) were observed in pH, electrical conductivity, lactose, or ash contents. Conversely, there was a highly significant correlation between the protein and fat contents (r = 0.805; p< 0.01) and a medium correlation between the lactose and ash contents (r = 0.661; p< 0.01). In conclusion, the results suggest that subclinical mastitis was negatively associated with a reduced milk yield and protein and fat contents. Thus, these parameters can be used to diagnose mastitis in dairy camels.


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Hadef, L., Hamad, B. and Aggad, H. (2020) “Effect of subclinical mastitis on milk yield and milk composition parameters in dairy camels”, Acta Biologica Szegediensis, 63(2). Available at: http://abs.bibl.u-szeged.hu/index.php/abs/article/view/3043 (Accessed: 21October2020).
Author Biographies

Brahim Hamad, University of El Oued

Department of Agronomy

Hebib Aggad, University of Tiaret

Institute of Veterinary Sciences


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