STUDIES ON CERTAIN QUALITY PARAMETERS AND PREVALENCE OF PATHOGENS OF PUBLIC HEALTH SIGNIFICANCE IN RAW MILK OF FARM ANIMALS
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Date
2017-08
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KARNATAKA VETERINARY, ANIMAL AND FOISHERIE'S SCIENCES UNIVERSITY, BIDAR
Abstract
The quality and safety of raw milk produced from farm animals assumes
utmost importance. The present study was planned to know the quality and safety
aspect of raw milk produced from farm animals. Cross sectional studies were planned
with a single time raw milk collection in micro watershed areas of Davanagere district
for analysis of various parameters. The results of the present study revealed that TVC
were within the BIS specifications (<2 lakhs) for raw milk of bovines where as for
YMC, there are no specifications by any regulatory agencies. However YMC counts
were in the higher range. The prevalence of milk borne pathogens in raw milk was
reported as 38.68 per cent of EPEC, 24.53 per cent of EIEC, 15.09 per cent of ETEC,
15.09 per cent of STEC, 19.57 per cent of enterotoxin producing S. aureus, 70.73 per
cent of enterotoxin producing CoNS and 0.008 per cent of L. monocytogenes and
presence of these pathogens is not permitted by FSSAI standards (FSSAI, 2012). The
antimicrobial resistance profile of the isolates as indicated by the MAR index ranged
between 0.06-0.94 for S. aureus with 34 MDR strains out of 46 isolates, 0.08-0.83 for
E. coli with 12 MDR strains out of 106 isolates and 0 resistance for L. monocytogenes.
The overall prevalence of subclinical mastitis in the present study was found to be 20
per cent. Highest incidence of subclinical mastitis was recorded in HF cross (33.33%)
followed by Jersey cross (25%), Non-descript (18.33%) and Buffalo (3.33%). The
overall mean concentration of trace minerals like zinc, copper and iron was found to
be 2.43±0.07, 0.49±0.02 and 4.4±0.21 ppm respectively that remained within the
RDA values and the toxic minerals like lead, arsenic and mercury was found to be
1.72 ±0.06, 6.15±0.44 and 15.37±0.81 ppm respectively that exceeded the maximum
permissible levels (FAO, 2012). Keeping the various parameters analysed, the quality
of milk produced from farm animals in the study area was found to be inferior in
quality and unsafe for consumption purpose as this may affect health of the
consumers.