Gellin G, Langlois B E, Dawson K A, Aaron D K
Department of Animal Sciences, University of Kentucky, Lexington 40546-0215.
Appl Environ Microbiol. 1989 Sep;55(9):2287-92. doi: 10.1128/aem.55.9.2287-2292.1989.
The antibiotic resistance patterns of gram-negative fecal bacteria from pigs in three herds with different histories of antibiotic exposure were examined. In general, smaller proportions of antibiotic-resistant or multiply resistant fecal isolates (P less than 0.05) were obtained from pigs in a herd not exposed to antimicrobial agents for 154 months than from pigs in a herd continuously exposed to antimicrobial agents at subtherapeutic doses or from pigs in a herd exposed only to therapeutic doses of antimicrobial agents. The proportions of antibiotic-resistant and multiply resistant strains were greater among isolates from pigs in the therapeutic herd than in the non-antibiotic-exposed herd (P less than 0.05). The proportion of antibiotic-resistant isolates in the non-lactose-fermenting population was greater than that in the lactose-fermenting population, regardless of herd. The results suggest that any form of antimicrobial exposure will increase the prevalence of antimicrobial resistance and multiple resistance of fecal bacteria.
对来自三个具有不同抗生素暴露史猪群的革兰氏阴性粪便细菌的抗生素耐药模式进行了检测。总体而言,与持续接受亚治疗剂量抗菌剂的猪群或仅接受治疗剂量抗菌剂的猪群相比,从未接触抗菌剂达154个月的猪群中获得的抗生素耐药或多重耐药粪便分离株比例更小(P小于0.05)。治疗性用药猪群的猪分离株中抗生素耐药和多重耐药菌株的比例高于未接触抗生素猪群(P小于0.05)。无论猪群如何,非乳糖发酵菌群中抗生素耐药分离株的比例高于乳糖发酵菌群。结果表明,任何形式的抗菌剂暴露都会增加粪便细菌的抗菌耐药性和多重耐药性的流行率。