Primjena kompetitivne ekskluzije u sprečavanju zaraze bakterijom Salmonella enterica subspecies enterica serovar Enteritidis u pilića.

A total of 250 newly-hatched broiler chickens allocated to two groups were used and two replicate trials were carried out. The chicks were dosed by gavage with commercial competitive exclusion (CE) product (trial groups) or with 0.5 ml of physiological saline (controls) at day 0, day 1 and day 5. On day 2, eight birds per tier were challenged by oral gavage with 0.5 ml of an approximate 107 organism/ml dilution of S. Enteritidis phage type 9a and were used as seeders. On the fifth day after challenge, and at 14 and 21 days of age, 12 chicks from each group were selected and Salmonellae were counted in their caeca. On days 14 and 21 the proportion of infected animals was significantly lower (P0.1) among treated groups with regard to the spleen colonization observed on days 14 and 21. On day 14, the number of chickens with infected spleen was 4/24 in challenge control and 9/24 in the treated group. On day 21 this proportion was 4/24 and 3/24, respectively. Commercial competitive exclusion product provided a significant protective effect against pathogenic S. Enteritidis PT 9a used for challenge.Ukupno 250 netom izleženih tovnih pilića korišteno je u dva usporedna istovjetna pokusa. Pilićima je u preporučenoj dozi primijenjen komercijalni proizvod za kompetitivnu ekskluziju (CE) u dobi 0, 1 i 5 dana (pokusna skupina) ili fiziološka otopina (kontrolna skupina). Drugog dana, 16 pilića bilo je zaraženo bakterijom Salmonella Enteritidis fagotipom 9a (suspenzijom s približno 107 bakterija/ml). Ti pilići bili su upotrijebljeni kao izvor zaraze i smješteni zajedno s ostalim pilićima pokusne odnosno kontrolne skupine. Petog dana nakon zaražavanja, tj. u dobi 14 i 21 dan, izdvojeno je 12 pilića po skupini kojima je određen broj salmonela u sadržaju cekuma. Udio zaraženih pilića bio je značajno manji (P