نتایج جستجو برای: antibiotic growth promoters
تعداد نتایج: 912673 فیلتر نتایج به سال:
Transcription of redD, the activator gene required for production of the red-pigmented antibiotic undecylprodigiosin by Streptomyces coelicolor A3(2), showed a dramatic increase during the transition from exponential to stationary phase. The increase in redD expression was followed by transcription of redX, a biosynthetic structural gene, and the appearance of the antibiotic in the mycelium, an...
The use of antibiotics in animal husbandry has long been associated with the appearance of antibiotic resistance and virulence factor determinants. Nonetheless, the number of cases of human infection involving resistant or virulent microorganisms that originate in farms is increasing. While many antibiotics have been banned as dietary supplements in some countries, other additives thought to be...
This study was conducted to investigate the effects of commercial probiotic mixtures (Liptosafe-L) via drinking water of broiler chickens in comparison with Antibiotic (Newmycin) on performance of Broiler Chicks and growth attributes. 120 broiler chicks (Ross 308) day old, and average weight of 41 grams, were subjected to a 41-day experimental period. The chick's were randomly divided into thre...
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