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OJVRTM
Online
Journal of Veterinary Research©
Volume 24 (4):252-254, 2020.
Sub-clinical mastitis, risk factors and effects on milk
quality.
Varadharajan
A1 , Gnanasekar R2
, Kothandaraman S3 and Sivasakthivelan
P4
123Division
of Animal Husbandry, 4Department of Microbiology, Faculty of
Agriculture, Annamalai University, Annamalai Nagar - 608002, Tamil Nadu, India.
ABSTRACT
Varadharajan
A, Gnanasekar R, Kothandaraman
S, Sivasakthivelan P., Sub-clinical mastitis, risk factors and effects on milk quality, Onl J Vet Res., 24 (4):252-256, 2020. We describe characteristics of
subclinical mastitis milk in dairy cows from 10 villages in Tamil Nadu, India over
a 12 month period. We found a
prevalence of 38% over 12 months for sub clinical mastitis in 76/200 cows
tested. Of 800 quarters 186 or 23% were positive with right 22% and left front
28%, right 22 and left hind 28%. Compared with normal controls, in cows with
mastitis we found higher (p < 0.05) milk pH (~5%) and ~18% lower fat content.
We also found reduced protein (~11%) but no differences with solid non fat. We found higher (P < 0.05) incidence of
subclinical mastitis in older cows and those with more frequent lactations but
no effect of stage of lactation, method of milking or housing.
Keywords: Prevalence, Subclinical mastitis, Physico-chemical Properties, Risk factors,
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