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. 2021 Jul;100(7):101141.
doi: 10.1016/j.psj.2021.101141. Epub 2021 Mar 22.

Clonal dissemination of Salmonella enterica serovar albany with concurrent resistance to ampicillin, chloramphenicol, streptomycin, sulfisoxazole, tetracycline, and nalidixic acid in broiler chicken in Korea

Bai Wei  1 , Ke Shang  1 , Se-Yeoun Cha  1 , Jun-Feng Zhang  1 , Hyung-Kwan Jang  2 , Min Kang  3
Affiliations

Clonal dissemination of Salmonella enterica serovar albany with concurrent resistance to ampicillin, chloramphenicol, streptomycin, sulfisoxazole, tetracycline, and nalidixic acid in broiler chicken in Korea

Bai Wei et al. Poult Sci. 2021 Jul.

Abstract

The aim of this study was to determine the prevalence, serovar distribution, antimicrobial resistance, and genotypic analyses of the dominating serovars of Salmonella in chickens from a national study in Korea. Between 2017 and 2018, a total of 550 chicken samples were collected from the top 12 integrated broiler chicken operations in Korea. Salmonella was isolated from 117 (32.5%) chicken feces and 19 (10.0%) retail chicken meat sources. Ten serovars were identified, and the most common Salmonella serovar was Salmonella ser. Albany (50 isolates, 36.8%), followed by S. Enteritidis (38 isolates, 27.9%), and S. Montevideo (23 isolates, 16.9%) isolated from 6, 10, and 6 operations, respectively. A total of 35 (25.7%) isolates were with the ACSSuTN (ampicillin, chloramphenicol, streptomycin, sulfisoxazole, tetracycline, and nalidixic acid) resistance pattern, with high prevalence of this resistance pattern in S. Albany (29 isolates, 58.0%). A total of 35 PFGE types were identified among Salmonella isolates of the serovars Albany, Enteritidis, Virchow, Montevideo, and Senftenberg, while 11 distinct types of PFGE patterns were found among S. Albany isolates, which showed an overall homology similarity of higher than 85%. Among these 35 PFGE types, 22 PFGE types corresponded to 32 isolates from samples limited to one operation, and the other 13 PFGE types corresponded to 72 isolates from samples widely distributed among different operations. These results highlighted rapid colony dissemination of multidrug-resistant S. Albany in chicken all over Korea after it first appeared in 2016; furthermore, the spread of Salmonella colonies between various integrated operations was common, and several operations played an important role in Salmonella carriage and transmission in Korea.

Keywords: Integrated chicken operations; S. Albany; antimicrobial resistance; colony dissemination; salmonella.

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Figures

Figure 1
Figure 1
Dendrograms based on Xba I-pulsed field gel electrophoresis (PFGE) profiles of Salmonella ser. Albany isolates from chicken and the corresponding antimicrobial susceptibility patterns to the 16 indicated antimicrobials. The Dice coefficient was used to perform similarity analysis. The antimicrobials shown in the sequence are amoxicillin/clavulanic acid (AUG2), ampicillin (AMP), cefoxitin (FOX), ceftazidime (TAZ), ceftiofur (XNL), cefepime (FEP), meropenem (MERO), trimethoprim/sulfamethoxazole (SXT), sulfisoxazole (FIS), chloramphenicol (CHL), ciprofloxacin (CIP), nalicixic acid (NAL), streptomycin (STR), gentamicin (GEN), tetracycline (TET), and colistin (COL).
Figure 2
Figure 2
Dendrograms based on Xba I-pulsed field gel electrophoresis (PFGE) profiles of Salmonella ser. Enteritidis isolates from chicken and the corresponding antimicrobial susceptibility patterns to the 16 indicated antimicrobials.
Figure 3
Figure 3
Dendrograms based on Xba I-pulsed field gel electrophoresis (PFGE) profiles of Salmonella ser. Montevideo (A), S. Virchow (B), and S. Senftenberg (C) isolates from chicken and the corresponding antimicrobial susceptibility patterns to the 16 indicated antimicrobials.
Figure 4
Figure 4
Overlap each of the PFGE types of Salmonella ser. Albany, S. Enteritidis, S. Montevideo, S. Virchow, and S. Senftenberg from one operation to other operations.
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