Evaluation of dairy milk and animal feed for the presence of pathogenic bacteria across different Districts of Khyber Pakhtunkhwa, Pakistan

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Research Paper 01/01/2020
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Evaluation of dairy milk and animal feed for the presence of pathogenic bacteria across different Districts of Khyber Pakhtunkhwa, Pakistan

Hamid Hassan, Bashir Ahmad, Fatima Gul, Nafees Bacha, Sarzameen Khan, Tariq Khan, Lalina Maroof, Aminulla
Int. J. Biosci.16( 1), 386-393, January 2020.
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Milk is a perfect biological fluid that provides excellent media for the growth of microorganisms, hence serving as a vehicle for transmission of food borne pathogens in humans. This study was conducted to assess the bacterial contamination of dairy milk and animal feed in different districts of Khyber Pakhtunkhwa (KP), Pakistan. Among 180 raw milk samples; 19.4% Salmonella, 41.1% Escherichia coli, 29.4% Staphylococcus aureus, 19.4% Pseudomonas aeruginosa and 16.1% Klebsiella species were identified. Tetra pack milk samples showed no growth of any pathogenic bacteria which could be attributed to effective pasteurization methods. Out of 180 animal feed (cottonseed cake 90, Wanda 90) samples; 26.6% Salmonella and 18.5% E. coli contamination was found. The significant value of raw and tetrapack milk was noted for both (p <0.0001). The bacterial contamination in raw milk at several less developed and less facilitated areas could be attributed to the unsatisfactory and unhygienic conditions during production and processing of raw milk. The presence of pathogenic bacteria in animal feed and especially milk can potentially cause a number of diseases in cattle and humans ranging from short lived temporary vomiting, nausea, diarrhea to life threatening hemorrhagic colitis and Guillen barre syndrome. The study highlights the need of appropriate hygienic and sanitary measures to control and/or minimize the risk of bacterial contamination. Further research is recommended to identify the risk of transmission of food borne pathogens in raw milk at other regions of the Khyber Pakhtunkhwa (KP).


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