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Type:	Artigo de Periódico
Title:	Research Note: Antimicrobial resistance profile of Enterococcus spp. isolated from the eggshell of laying hens submitted to pharmacological treatment
Authors:	H. C. P. Figueiredo M. R. Souza I.P. Lanza S.V. Cançado G.R. Silva L.D.M. Menezes D.C.S. Assis Ângela Maria Quintão Lana Leonardo José Camargos Lara T.C. Figueiredo
Abstract:	The occurrence of antimicrobial resis tance in microorganisms isolated from eggshells, espe cially Enterococcus, might serve as a parameter to assess the selection of bacteria due to the use of drugs in the diet of laying hens. In order to evaluate the fre quency and the antimicrobial resistance profile of Enterococcus spp. isolated from the eggshells, 225 Hy line laying hens were submitted to a 25-d long trial. The treatments were the following: hens fed ration without antimicrobials (control) and groups that received oxy tetracycline (10 mg kg 1 ), doxycycline (20 mg kg 1 ), lin comycin (50 mg kg 1 ), and enrofloxacin (10 mg kg 1 ) in the ration for 5 d. Six replications were analyzed per treatment, composed of a pool of 5 eggs each. They were collected before treatment and on days 3, 6, 15, and 25, totaling 150 samples. Eggshells were submitted to counts of Enterococcus spp., which were identified by proteomic analyses. Antimicrobial resistance was deter mined by the disk-diffusion test. It was observed that 97.3% (n = 146) of the samples were contaminated with Enterococcus spp. There were no differences (P > 0.05) in the bacterial counts between treatments on the same day of evaluation. E. faecalis and E. faecium were the most frequent on the eggshells of all treat ments. Multiresistance to the four classes of antimicro bials was also verified in the isolated bacteria. A total of 83% of the Enterococcus isolates showed resistance to neomycin, which was not administered to the hens, demonstrating an environmental problem. Thus, feed ing laying hens with diets added with antimicrobials induces drug resistance in Enterococcus spp., isolated form the eggshells.
Subject:	Medicina Veterinária Ovos Produção animal
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	VET - DEPARTAMENTO DE ZOOTECNIA
Rights:	Acesso Aberto
metadata.dc.identifier.doi:	https://doi.org/10.1016/j.psj.2021.101606
URI:	http://hdl.handle.net/1843/56449
Issue Date:	Feb-2021
metadata.dc.url.externa:	https://www.sciencedirect.com/science/article/pii/S0032579121006271?via%3Dihub
metadata.dc.relation.ispartof:	Poultry Science
Appears in Collections:	Artigo de Periódico

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