Certain Studies on Subacute Ruminal Acidosis in Dairy Cows
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Date
2012-06-20
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Karnataka Veterinary, Animal and Fisheries Sciences University , Bidar
Abstract
The objectives of this study was to study the incidence of subacute rumen acidosis
in dairy cattle and to study the effect of SARA on general health condition, body
condition score, daily milk production, milk fat content, rumen fluid, feces and
biochemical parameter.
SARA was diagnosed by measuring pH of rumen fluid collected by
rumenocentesis four hours after feeding. Dairy cows having rumen fluid pH in the range
of 5.2 to 5.6 for a duration of minimum three hours were considered as positive for
SARA.
The incidence of SARA in dairy cows was found to be 20 per cent. The incidence
of SARA was 70 per cent and 30 per cent in Jersey and HF breed of cows respectively.
The incidence of SARA was high in mid lactation. The general health condition was
disturbed in SARA affected dairy cows. Further 65 per cent of cows were in poor body
condition score. The fecal pH in SARA affected dairy cows was significantly low. SARA
affected fecal consistency and fecal structure in SARA affected dairy cows. Daily milk
production and milk fat content were statistically low in SARA affected dairy cows.
Rumen fluid examination indicated significantly lower SAT, significantly increased
MBRT and poor to moderate iodophilic activity. Mean total protozoal count in SARA
affected dairy cows was statistically low and there was a shift in the rumen microbial
composition to Gram positive bacteria in SARA affected dairy cows. The mean GGT and
AST values were found to be significantly increased in SARA affected dairy cows.
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P.G. Thesis
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