Salinomycin
Mostrando 25-30 de 30 artigos, teses e dissertações.
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25. CP-72,588, a semisynthetic analog of the polyether ionophore UK-58,582 with increased anticoccidial potency.
We have employed semisynthesis to enhance the anticoccidial potency of a polyether ionophore. CP-72,588 is the alpha-methyl analog of the fermentation-derived polyether ionophore UK-58,852. The parent ionophore required a dose of 15 ppm to achieve anticoccidial efficacy in chickens equivalent to that of salinomycin at 60 ppm. CP-72,588 demonstrated substanti
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26. Effects of Dietary Fat Source and Subtherapeutic Levels of Antibiotic on the Bacterial Community in the Ileum of Broiler Chickens at Various Ages
The effect of dietary fat source (soy oil or a mixture of lard and tallow) and dietary supplementation with antibiotics (a combination of avilamycin at 10 mg kg of feed−1 and salinomycin at 40 mg kg of feed−1) on the bacterial community in the ileum of broiler chickens at different ages (7, 14, 21, and 35 days) was studied using PCR with denaturing gradi
American Society for Microbiology.
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27. Discriminant analysis of antibiotic resistance patterns in fecal streptococci, a method to differentiate human and animal sources of fecal pollution in natural waters.
Discriminant analysis of patterns of antibiotic resistance in fecal streptococci was used to differentiate between human and animal sources of fecal pollution in natural waters. A total of 1,435 isolates from 17 samples of cattle, poultry, human, and wild-animal wastes were obtained, and their ability to grow in the presence of four concentrations of five an
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28. Susceptibility and resistance of ruminal bacteria to antimicrobial feed additives.
Susceptibility and resistance of ruminal bacterial species to avoparcin, narasin, salinomycin, thiopeptin, tylosin, virginiamycin, and two new ionophore antibiotics, RO22-6924/004 and RO21-6447/009, were determined. Generally, antimicrobial compounds were inhibitory to gram-positive bacteria and those bacteria that have gram-positive-like cell wall structure
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29. Toxoplasma gondii: susceptibility and development of resistance to anticoccidial drugs in vitro.
Anticoccidial drugs were evaluated for activity and for the development of resistance in a model of Toxoplasma gondii growing in human fibroblast cultures. Of 13 anticoccidial drugs tested, 9 had selective antitoxoplasma activity (50% inhibitory concentration, in micrograms per milliliter): decoquinate (0.005), arprinocid-N-oxide (0.015), robenidine (0.03),
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30. Phenotypic and Genotypic Changes in Salmonella enterica subsp. enterica Serotype Typhimurium during Passage in Intestines of Broiler Chickens Fed on Diets That Included Ionophore Anticoccidial Supplements
The effect of continuous in-feed administration of anticoccidial agents on antimicrobial sensitivity and the level of bacterial shedding in poultry experimentally infected with Salmonella enterica subsp. enterica serotype Typhimurium definitive type 104 (DT104) were investigated. On day 0, 1,200 1-day-old Salmonella-free broiler chicks were placed into 50 pe
American Society for Microbiology.