OBJECTIVES To examine the ability of flavophospholipol to inhibit bacterial conjugation between Escherichia coli donor and recipient pairs in vitro and in day-of-hatch chickens. METHODS In vitro donor cultures were incubated in the presence of 0, 2, 4, 8, 16, 32 and 64 mg/L flavophospholipol during primary overnight mono-cultures only, secondary conjugation cultures only, or throughout primar...

A "plasmid-curing effect" of multiresistant Escherichia coli by flavophospholipol, an antibiotic used as an antimicrobial growth promoter (AMGP) in animal feeds, has been reported to occur in vitro and in vivo under experimental conditions. In this study, the effect of flavophospholipol under field conditions was studied. The prevalence and degree (proportion of resistant strains to the total n...

Materials and methods: Fifty-six pigs (60 days old) that tested negative by culture for Salmonella were allocated into four treatment groups and challenged with either Salmonella serovar Typhimurium DT104 or Salmonella Typhimurium DT193. After challenge, each treatment group was fed one of four feed rations: a ration containing no antimicrobials (Control) or the same ration containing either fl...

to investigate the effect of cinnamon, turmeric and carnation powders on growth performance, carcass characteristics, morphological and ph changes of intestine and blood serum oxidation status in broilers, 450 unsexed ross 308 day-old broiler chicks were randomly allotted in a completely randomized design with six treatments, five replicates and 15 birds per each replicate, for 42 days. the bro...

AIM An in vivo experiment was conducted to investigate the effect of different levels of ethanolic extract of propolis, on growth performance, carcass traits, serum biochemistry, and humoral immune responses of chickens, as compared with the antibiotic flavophospholipol. MATERIALS AND METHODS 312 1-day-old as-hatched broiler chicks (Ross 308) were randomly allotted to 6 treatments with 4 repl...