title: [Effect of the number of lactation periods on the IgM level in the colostrum and peripheral blood serum of pregnant cows and calves].
abstract: The level of immunoglobulins of IgM class was determined in serum of peripheral blood of cows of the black-white breed, being after first, second and third lactation, in blood serum of calves in the period from birth to the 12th week of age as well as in beestings from the first milking. IgM level in serum and beestings was determined by redial immunodiffusion according to Mancini et al., as modified by Fahey and Mc Kelvey. Statistic analysis of the results obtained (double nonorthogonal crossing, correlation test) showed that after one, two or three lactations no changes in IgM level occurred in serum of cows in the last month of pregnancy and in beestings from the first milking. A relationship was found between IgM level in serum of pregnant cows, in beestings and in serum of calves fed with beestings at the age from the third day to one week.
mesh_terms: D000375:Aging; D000818:Animals; D000831:Animals, Newborn; D002417:Cattle / Q000502:physiology*; D003126:Colostrum / Q000276:immunology*; D005260:Female; D005312:Fetal Blood / Q000276:immunology*; D007075:Immunoglobulin M / Q000032:analysis*; D007774:Lactation; D010298:Parity; D011247:Pregnancy; D011270:Pregnancy, Animal
chemical_list: D007075:Immunoglobulin M
vernacular_title: Wpływ ilości laktacji na poziom IgM w siarzezarnych i cielat.