Antibody titre against Toxocara vitulorum was determined by indirect haemagglutination (IHA) test in the purified colostral immunoglobulins of 10 crossbred cows. All cows had a varying amount (1:4-1:32) of indirect haemagglutinating antibodies in their colostrum. At 0 hour (after parturition), it was the highest (GMT = 13.92)which gradually declined (GMT = 1.74) at 36 hours and became nil at 48, 60 and 72 hours.
