C E Schneitz

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The dosing of young chicks with cultures of normal gut flora has been termed "competitive exclusion" (CE). This study was undertaken to examine, under field conditions, the effect of CE treatment on counts of intestinal Clostridium perfringens (CP) and on the occurrence of CP-associated disease in broiler chickens. A farm having recurrent CP-associated(More)
The effect of the competitive exclusion (CE) product BROILACT on Salmonella colonization, nutrient digestibility, and the ME of the feed and the production of volatile fatty acids in the chicken gut was evaluated. The ileal viscosity and the fecal dry matter content were also determined. Newly hatched broiler chicks were given BROILACT orally either once on(More)
Two trials were conducted to study the effects of a competitive exclusion (CE) product BROILACT and the anticoccidial narasin on the incidence of necrotic enteritis (NE), the numbers of Clostridium perfringens (CP) in the caeca of broiler chicks and the performance of the birds. In trial 1 the effects of type of protein and partial replacement of a narasin(More)
The origin of the competitive exclusion (CE) concept in controlling a Salmonella infantis outbreak in poultry in 1971 and the subsequent development of a commercial treatment product are described. The possible role of CE in salmonella control, current status of the concept and theories relating to the bacteria involved and mechanisms of protection are(More)
The competitive exclusion (CE) concept has been tested against both non-invasive and invasive salmonella serotypes. Studies with different challenge models indicate that CE treatment is likely to protect the young bird against all serotypes that are capable of intestinal colonization. Spray or 'droplet' application of the CE-treatment material was compared(More)
In this work we have analyzed the bacterial composition of anaerobically cultured cecal contents (mixed broth culture) of adult fowls previously shown able to protect 1 day old chickens from oral Salmonella infections. All four cultures studied in this paper gave complete protection against Salmonella infantis when used undiluted or in the 10(-2) dilution(More)
Lactobacillus acidophilus was isolated from washed and homogenized walls of the crop and caecum of an adult fowl. A strain that adhered well in the Fuller adhesion test was subcultured until colonies on Lactobacillus Selective agar changed from rough to smooth. This coincided with a change from aggregate to planktonic growth in liquid medium and a marked(More)
1. Newly-hatched broiler chicks were treated orally with a commercial competitive exclusion product (Broilact) in 3 replicate trials 2. After 24 h the treated chicks and untreated control chicks were challenged orally with approximately 10(4) cfu of Campylobacter jejuni. 3. The caeca of the birds were examined quantitatively for campylobacter 12 d after the(More)
Extended-spectrum β-lactamases (ESBL) and class C serine β-lactamases (pAmpC) able to hydrolyze third-generation cephalosporins are a recognized threat to the efficacy of these drugs in treating serious infections. Broiler chicks are a known source of Escherichia coli harboring genes for these enzymes. Competitive exclusion (CE) has been used for decades in(More)
1. The recommended dose of a commercial competitive exclusion (CE) product (BROILACT) was given orally to newly-hatched broiler chicks to protect them against oral challenge by Salmonella enteritidis PT4. 2. In 5 replicate trials, half of the birds thus treated and half from untreated control groups were examined for salmonellas at 5 d and the other half at(More)