Effect of bambermycins on quantity prevalence duration and anti microbial resistance of salmonella typhimurium in experimentally infected broiler chickens

George, B.A.; Fagerberg, D.J.; Quarles, C.L.; Fenton, J.M.; Mckinley, G.A.

American Journal of Veterinary Research 43(2): 299-303


ISSN/ISBN: 0002-9645
Accession: 005222359

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Twenty broiler chickens were fed bambermycins (Flavomycin) at the rate of 3 g/ton (US) for 63 days; 20 control birds were fed nonmedicated feed. The birds were inoculated (dosed) on the 10th and 11th feeding day with S. typhimurium. The effects of bambermycins on Salmonella incidence, shedding and antimicrobial resistance were evaluated. Bambermycins had no effect on body weights, duration of shedding of salmonellae, number of salmonellae shed on postdosing day 3, tissue recoverability of salmonellae and total number of resistance patterns. Bambermycins resulted in the decrease of salmonellae to be more gradual; however, both treatments were comparable at the end of the study. The majority of S. typhimurium from bambermycins-treated birds maintained the original antibiogram of streptomycin, sulfadiazine and nalidixic acid. The salmonellae isolated from the control birds were more resistant to 2 drugs (varying antibiograms). Bambermycins as a feed additive in broiler diets given at the dose level of 3 g/ton had no detrimental effects based on salmonellae shedding and antimicrobial resistance.