Prevalence of metabolic disease in transition dairy cows in Lima, Peru
Blood concentrations of non-esterified fatty acids (NEFA) and beta-hydroxybutyrate (BHBA) and pH of rumen fluid can be monitored to indicate cows or herds at risk for metabolic disease. The objective of this study was to determine the prevalence of excessive negative energy balance (NEB), subclinical ketosis (SCK), and subacute ruminal acidosis (SARA) in transition cows in dairy herds near Lima, Peru. A total of 128 Holstein cows from 16 herds 2-16 days prepartum and 166 Holstein cows from 19 herds 3-21 days postpartum was tested for NEFA and BHBA concentrations, respectively. Rumen pH was tested in 47 Holstein cows from 9 herds. A herd was said to be at an alarm level for metabolic diseases if >/-15% of sampled cows had elevated metabolic indicators. Retrospective herd-level incidence of displaced abomasum, retained placenta, and low milk production was also recorded. Of the sampled herds, 87.5% were at or above the alarm level of NEB, and 52.6% of herds sampled were at or above the alarm level for SCK. The prevalence of SARA was 0% in all herds sampled. Herds at the alarm level for subclinical ketosis were 1.5 times more likely to have a retained placenta than herds below the cut point. The results suggest that subclinical metabolic disease in transition cows is present in dairy herds surrounding Lima, Peru at levels that may negatively impact milk production.
Senior seminar paperSeminar SF610.1 2009 B75
Cattle -- Diseases -- Diagnosis