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OJVRTM
Online Journal of Veterinary Research©
Volume 20(7):465-470, 2016.
Incidence
of clinical and subclinical hypocalcemia in dairy herds.
Saeed Azimpour
DVM DVSc , Danial Mohammadi.
Department
of Clinical Science, Veterinary Faculty, Babol
Branch, Islamic Azad University, Babol, Iran.
A B S T R A C T
Azimpour S, Mohammadi D., Incidence of clinical and subclinical
hypocalcemia in dairy herds, Onl J Vet Res., 20(7):465-470, 2016. Most cows experience transient hypocalcemia
immediately before and at onset of lactation due to production of colostrum. Incidence of clinical and subclinical hypocalcemia in 952 cattle
from 4 dairy herds were assessed within 48h of partus.
Calcium levels varied from 6.86 ± 1.82 at 6th lactation to 8.51 ±
1.24mg/dl at 1st lactation. Blood calcium was negatively correlated
with number of lactations (r =-0.342, p<0.01) and significant different
calcium values (P<0.001) were found at different lactations. Mean incidence
of clinical hypocalcemia was 4.94% and subclinical form, 34.24%. Number of
lactations was related (P<0.001) with incidence of subclinical and clinical
hypocalcaemia. Findings suggest that clinical and subclinical hypocalcaemia
increase with frequency of lactations.
Key word: Dairy cow, Hypocalcaemia, Incidence.
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