Alternative Routes for Salmonella Intestinal Tract Colonization of Chicks
نویسندگان
چکیده
منابع مشابه
De novo pyrimidine synthesis is necessary for intestinal colonization of Salmonella Typhimurium in chicks
pyrE (STM3733) encodes orotate phosphoribosyltransferase (OPRTase; EC 2.4.2.10), the fifth enzyme of the de novo pyrimidine biosynthetic pathway. We identified a ΔpyrE mutant as under selection in screening of a Salmonella mutant library in 4-day old chicks. Here, we confirm that a ΔpyrE mutant colonizes 4-day old chicks poorly in competitive infection with isogenic wild type, and that the abil...
متن کاملIdentification of Salmonella typhimurium genes required for colonization of the chicken alimentary tract and for virulence in newly hatched chicks.
From a collection of 2,800 Tn5-TC1 transposon mutants of Salmonella typhimurium F98, 18 that showed reduced intestinal colonization of 3-week-old chicks were identified. The sites of transposon insertion were determined for most of the mutants and included insertions in the lipopolysaccharide biosynthesis genes rfaK, rfaY, rfbK, and rfbB and the genes dksA, clpB, hupA, and sipC. In addition, id...
متن کاملComparison of Experimental Competitive-exclusion Cultures for Controlling Salmonella Colonization in Broiler Chicks
The efficacy of three different types of experimental competitive exclusion (CE-A, CE-B and CE-C) cultures against Salmonella Kedougou (SK) NCTC 12173, resistant to nalidixic-acid resistant (Nal), in one-day-old broiler chicks, in four treatments with three replicates in each treatment, was evaluated. The mean logarithmic counts of Salmonella program of feces were 0.4 L in the group treated wit...
متن کاملPrevention of Salmonella Typhimurium colonization and organ invasion by combination treatment in broiler chicks.
The effects in broiler chicks of treatment with a competitive exclusion (CE) product, an experimental dietary probiotic, and the abiotic beta-glucan on cecal colonization, organ invasion, and serum and intestinal IgG and IgA levels to Salmonella challenge was evaluated. Four groups of 1-d-old chicks were treated by oral gavage on d 1 with an appropriate dose of a commercial CE product. Three gr...
متن کاملResistance of the Mouse's Intestinal Tract to Experimental Salmonella Infection
Determinations of pH, Eh, and concentrations of acetic, butyric and lactic acids were made on the content of cecum and transverse colon of groups of mice killed 1, 3, and 5 days after oral administration of 50 mg streptomycin. Control observations on untreated mice are reported in the preceding communication. Heat-killed supenatants of suspensions of bowel content were tested in vitro for their...
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ژورنال
عنوان ژورنال: Journal of Applied Poultry Research
سال: 1996
ISSN: 1056-6171
DOI: 10.1093/japr/5.3.282