Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 9(10): 1660-1668
Http://dx.doi.org/10.17582/journal.aavs/2021/9.10.1660.1668
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El-Shaimaa N. Mehany1, Mohamed A. El-Shafaie1, Karima M. Fahim2*, Said S. Sallam2

1Department of Mastitis and Neonates, Animal Reproduction Research Institute (ARRI); 2Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.

Abstract | The objective of this study was to investigate bulk tank somatic cell count and associated risk factors influencing the hygienic quality and chemical composition of raw milk; additionally, to assess the impact of somatic cell count (SCC/ml) on the microbial and chemical profiles of Bulk Tank Milk (BTM). A total of 214 BTM samples were collected from different dairy farms in Alexandria, Menofia and El-Dakahlia Governorates, Egypt. Samples were collected during the period from January 2019 to September 2020. The mean values of SCC/ml, Aerobic Plate Count APC (cfu/ml), Coliform count (MPN/ml), Staphylococcus aureus count and Bacillus cereus count (cfu/ml) were 6.85×105±0.33×105, 7.09×106±2.76×106, 2.77×104±0.63×104, 1.27×103±0.25×103 and 3.32×103±0.13×103, respectively. Identification of the isolated strains reveals the presence of S. aureus; coagulase negative staphylococci (CNS); St. uberis, E. coli and B. cereus with incidence of 19.16%, 62.15%, 21.50%, 32.24% and 10.28% of the examined BTM samples, respectively. The correlation between SCC and different bacteriological and chemical parameters was estimated using Pearson’s correlation coefficient (r). Most BTM samples tested for milk quality parameters were below the acceptable limits suggested by the legislations; however, food poisoning bacteria (E. coli, B. cereus and S. aureus) were isolated. Thus, there is a need to improve milking hygiene, proper herd and udder health management to improve quality and safety of raw milk.

Keywords | Bulk tank milk, Somatic cell count, Microbial quality, Safety, Milk composition