A study on dairy cow management and the related bulk tank milk bacteria in Kerman County during cold and hot seasons

Document Type : Research Paper

Authors

1 DVM, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran

2 Assistant Professor, Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran

3 Assistant Professor, Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

    Several factors affect the quality of raw milk including the health of livestock, the milking style, and the hygiene and status of milking equipment. This study aimed to evaluate the indicator-bacteria related to the bulk tank milk management of dairy farms in Kerman County. The results will help in planning and performing good farm management practices. The bulk tank milk samples of 15 dairy farms were collected aseptically on the ice during cold and hot seasons. Total bacterial count (TBC), coliform count (CC), laboratory pasteurized count (LPC), Staphylococcus aureus count (SC), and somatic cell count (SCC) of the samples were assessed on every day of sampling. The questionnaires were also completed by the researchers at the farms. A mixed-design ANOVA with a significant level of 0.05 was performed to assess the interactions between different levels of management factors, laboratory results, and the seasons. During the cold season, LPCs, CCs, and SCCs were lower than in the hot season. The TBC of bulk tank milk in farms with a dirt floor was lower than other farms using concrete or roughcast (p < 0.05). Employing milking unit workers from the farmer’s family significantly reduced the CCs of the bulk tank milk. The TBC of bulk tank milk in farms that performed the teat dipping procedure before or after milking tended to reduction (despite non-statistical significance). Application of management factors such as teat drying by disposable paper towel, teat post-dipping, and dry cow therapy by long-act intramammary antibiotic ointment is considered seriously in more than 50% of the farms. Scientific education of management tips to stockmen and employment of committed workers will be very effective in the simultaneous implementation of all basic hygienic actions and therefore increasing the quality of the produced milk.

Keywords

References

Barkema, H., Schukken, Y., Lam, T., Beiboer, M., Benedictus, G. & Brand, A. (1998). Management practices associated with low, medium, and high somatic cell counts in bulk milk. Journal of Dairy Science, 81(7), 1917-1927.
Bartlett, P., Miller, G.Y., Lance, S. & Heider, L.E. (1992). Clinical mastitis and intramammary infections on Ohio dairy farms. Preventive Veterinary Medicine, 12(1-2), 59-71.
Blowey, R., Davis, J. & Edmondson, P. (1997). Bacterial counts in bulk milk-an underused investigation technique. In Practice, 19(3), 122-127.
Blowey, R.W. & Edmondson, P. (2010). Mastitis control in dairy herds (2nd ed.). UK: Cabi.
Bonfoh, B., Roth, C., Traoré, A., Fané, A., Simbé, C., Alfaroukh, I., Nicolet, J., Farah, Z. & Zinsstag, J. (2006). Effect of washing and disinfecting containers on the microbiological quality of fresh milk sold in Bamako (Mali). Food Control, 17(2), 153-161.
Dayyani, D., Karim, G., Bokaie, S. & Aminlari, M. (2000). The study of hygienic quality of raw milk according to measurement of chemical parameters and total bacterial count in Iran Dairy Industry Factory. Iranian Journal of Veterinary Medicine, 55(3), 59-61.
Devani, K., Valente, T.S., Crowley, J.J. & Orsel, K. (2019). Development of optimal genetic evaluations for teat and udder structure in Canadian Angus cattle. Journal of Animal Science, 97(11), 4445-4452.
Elmoslemany, A., Keefe, G., Dohoo, I. & Jayarao, B. (2009a). Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 1: Overall risk factors. Journal of Dairy Science, 92(6), 2634-2643.
 Elmoslemany, A., Keefe, G., Dohoo, I. & Jayarao, B. (2009b). Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 2: Bacteria count-specific risk factors. Journal of Dairy Science, 92(6), 2644-2652.
Elmoslemany, A.M., Keefe, G., Dohoo, I., Wichtel, J., Stryhn, H. & Dingwell, R. (2010). The association between bulk tank milk analysis for raw milk quality and on-farm management practices. Preventive Veterinary Medicine, 95(1-2), 32-40.
Green, M., Bradley, A., Newton, H. & Browne, W. (2006). Seasonal variation of bulk milk somatic cell counts in UK dairy herds: Investigations of the summer rise. Preventive Veterinary Medicine, 74(4), 293-308.
Harmon, R. (1994). Physiology of mastitis and factors affecting somatic cell counts. Journal of Dairy Science, 77(7), 2103-2112.
Jayarao, B.M., Pillai, S., Sawant, A., Wolfgang, D. & Hegde, N. (2004). Guidelines for monitoring bulk tank milk somatic cell and bacterial counts. Journal of Dairy Science, 87(10), 3561-3573.
Murphy, S. & Boor, K. (2000). Trouble-shooting sources and causes of high bacteria counts in raw milk. Dairy, Food and Environmental Sanitation, 20(8), 606-611.
Najaf Najafi, M. & Mortazavi, A. (2009). Total bulk cow milk somatic cell counts and its relation with milk composition in Khorasan Razavi province in Iran. Food Science and Technology, 6(2), 63-73.
Owusu-Kwarteng, J., Akabanda, F., Agyei, D., & Jespersen, L. (2020). Microbial safety of milk production and fermented dairy products in africa. Microorganisms, 8(5), 752-776.
Pantoja, J., Reinemann, D. & Ruegg, P. (2009). Associations among milk quality indicators in raw bulk milk. Journal of Dairy Science, 92(10), 4978-4987.
Perkins, N., Kelton, D., Hand, K., MacNaughton, G., Berke, O. & Leslie, K. (2009). An analysis of the relationship between bulk tank milk quality and wash water quality on dairy farms in Ontario, Canada. Journal of Dairy Science, 92(8), 3714-3722.
Philpot, W.N. & Nickerson, S.C. (2000). Winning the fight against mastitis. Naperville, IL: Westfalia Surge.
Riekerink, R.O., Barkema, H.W. & Stryhn, H. (2007). The effect of season on somatic cell count and the incidence of clinical mastitis. Journal of dairy science, 90(4), 1704-1715.
Schukken, Y., Grommers, F., Van de Geer, D., Erb, H. & Brand, A. (1990). Risk factors for clinical mastitis in herds with a low bulk milk somatic cell count. 1. Data and risk factors for all cases. Journal of Dairy Science, 73(12), 3463-3471.
Suzuki, N., Yuliza Purba, F., Hayashi, Y., Nii, T., Yoshimura, Y. & Isobe, N. (2020). Seasonal variations in the concentration of antimicrobial components in milk of dairy cows. Animal Science Journal, 91(1), e13427-13434.
Szteyn, J., Wiszniewska, A., Fus-Szewczyk, M.M. & Cichosz, W. (2005). Changes in microbiological quality of raw milk from the region of Warmia and Mazury in 1998-2003. Veterinarija ir Zootechnika, 32(54), 62-65.
Wehr, H.M. & Frank, J.F. (2004). Standard methods for the examination of dairy products (17th ed.). Washington DC: American Public Health Association.
Zucali, M., Bava, L., Tamburini, A., Brasca, M., Vanoni, L. & Sandrucci, A. (2011). Effects of season, milking routine and cow cleanliness on bacterial and somatic cell counts of bulk tank milk. Journal of Dairy Research, 78(4), 436-441.

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