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Effects of the productive status in zebu heifers on the immunoglobulin M and G levels in bovine Trypanosoma vivax infection


Animal Reproduction Science 12: 179-187
Effects of the productive status in zebu heifers on the immunoglobulin M and G levels in bovine Trypanosoma vivax infection
Immunoglobulin M and G levels in bovine Trypanosoma vivax infection were compared in non-pregnant, first, second and third trimester pregnant heifers. All the infected heifers showed a significant rise in IgM levels when compared to the non-infected controls. 7-8 fold increases were recorded. There were however differences in the rate of increases and ability to maintain peak level response (P<0.01) between the groups. Infected pregnant heifers in the first and second trimester responded better than infected non-pregnant and infected heifers in the third trimester. In all the groups, the differences between the infected and control heifers were highly significant (P<0.001). The IgG levels showed a similar pattern of increases in infected heifers although response was gradual. In the different groups, 1.4 to 2.5-fold increases were recorded. These were significantly different from levels in the control (P<0.01). Again, pregnant heifers responded better than non-pregnant heifers except those in the third trimester. The results correlated with the observation that given the same conditions, clinical manifestation of T. vivax infection is more severe in non-pregnant than in pregnant heifers except those in advanced pregnancy.


Accession: 001820568

DOI: 10.1016/0378-4320(86)90038-2



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