[Changes in the aortic arch of calves with bacterial infections].

The autopsy and histopathological changes in the wall of aortic arch were presented in calves died of pulmonary and intestinal disorders. The bacteriological examinations of the internal organs demonstrated: E. coli, Pseudomonas aeruginosa Corynebacterium et al.

[Determining trends in changes of total proteins and immunoglobulins in the blood serum of calves in the first few days of their life].

671 samples of calves' blood serum taken from the 2nd to the 6th day after birth were examined to determine the level of total protein and immunoglobulins. When establishing the trends (linear, square and cubic) of the significance of coefficients and the quality of approximation there was considered the day after birth on which blood was sampled as well as the feeding season. Ig were proved to show a clear regressive trend, i.

Preparation of immune sera against carcinoembryonic antigen (CEA).

CEA antigen obtained by the Wrocław team and CEA standard antigen from Chester Beatty Cancer Research Institute, London were used for immunization of goats. Two immunization methods were adopted: one with decreasing antigen doses beginning from 500 microgram and the other with equal, small doses of 10 microgram. Anti-goat IgG1 + IgG2 immune serum was obtained by immunizing a horse with 10 mg of the antigen with complete Freund's adjuvant.

Observations of absorption of immunolactoglobulins in calves.

The aim of this study was to ascertain whether administration of one liter of stilulated saliva from a healthy cow as first food to newborn calves blocks absorption of immunolactoglobulins administered later in colostrum or milk. The study material consisted of 12 calves, divided into two groups, one of which received colostrum, and the other milk. Blood samples were drawn immediately after birth and 3 and 6 hours after administration of saliva and 3 and 6 hours after administration of colostrum (group I) or milk (group II).