Immunoglobulin concentration in blood serum of postcolostral calves: Ratio between immunoglobulin level and appearance of enzootic pneumonia

Abstract

Blagovremeno snabdevanje novorođene teladi optimalnim količinama kolostruma ima ključnu ulogu u procesu imunske zaštite u ranoj fazi njihovog života. Pasivno stečena antitela mogu da zaštite organe za varenje od infekcije izazvane E. coli bakterijom, a po svemu sudeći i od nastajanja oboljenja respiratornog trakta. Na farmi goveda, na kojoj je bronhopneumonija jedan od najznačajnijih zdravstvenih problema, za ova ispitivanja je odabrana grupa od 39 teladi. Telad su posle rođenja napajana kolostrumom svoje majke, a potom zbirnim mlekom. U uzorcima krvi koji su uzimani u postkolostralnom periodu određivana je metodom sa cink-sulfatom koncentracija imunoglobulina. U uzrastu od 40 dana telad su vakcinisana polivalentnom inaktivisanom vakcinom, a 20 dana posle toga revakcinisana (Vibak, Vet. zavod Subotica). Kod 74,34 posto teladi koncentracije imunoglobulina G se kretala od 26 do 40 g/l. Kod 25,66 posto teladi koncentracija imunoglobulina bila je niža i iznosila je 8 do 25 g/l. Telad kod kojih je utvrđena niža koncentracija imunoglobulina u krvi češće su obolevala od bronhopneumonije, a u nekim slučajevima je došlo i do uginuća.

The timely supply of newborn calves with optimal quantities of colostrum has a key role in the process of immune protection in the early phase of their lives. Passively acquired antibodies can protect the digestive organs from infection caused by E.coli bacteria, and it seems also from the appearance of diseases of the respiratory tract. These examinations were performed on a cattle farm where bronchopneumonia was one of the most significant health problems, and a group of 39 calves were selected for the investigations. The calves were fed with their mothers’ colostrum after birth, and then with collective milk. Immunoglobulin concentration was determined in blood samples taken during the postcolostral period, with the method using zinc-sulphate. At the age of 40 days, the calves were administered a polyvalent inactivated vaccine, and revaccinated 20 days after that (Vibak, Veterinary Department Subotica). In 74.34% calves, the immunoglobulin G concentration ranged from 26 to 40 g/l. In 25.66% calves, the immunoglobulin concentration was lower, from 8 to 25 g/l. The calves found to have a lower concentration of immunoglobulin in blood contracted bronchopneumonia more frequently, and the outcome of the disease in some cases was mortality, even.