Prevalence of antimicrobial resistance of non-typhoidal Salmonella serovars in retail aquaculture products

Zhang, Jianmin; Yang, Xiaowei; Kuang, Dai; Shi, Xianming; Xiao, Wenjia; Zhang, Jing; Gu, Zhen; Xu, Xuebin; Meng, Jianghong

doi:10.1016/j.ijfoodmicro.2015.04.019

Cited by 51 publications

(37 citation statements)

References 25 publications

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“…In this context, Zhang et al (2015) investigated the incidence of Salmonella in 730 samples aquaculture products from China, and found discordant results with this present study, since 217 (29.7%) of samples were positive for this bacteria. For these authors, aquaculture products, including shrimps, can become sources of Salmonella by exposure to contaminated water or through processing practices.…”

Section: Discussionsupporting

confidence: 59%

Drug-resistant bacteria in frozen and fresh marine shrimp

Macedo¹,

Marinho²,

Vasconcelos³

et al. 2016

Afr. J. Microbiol. Res.

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This study aimed to evaluate the bacteriological quality of frozen and fresh shrimp samples by Salmonella detection and the quantification of staphylococci and coliforms. Antimicrobial susceptibility profile of staphylococci isolates was also determined. A total of 30 shrimp samples commercialized in Sobral-CE -15 fresh and 15 frozen, each one weighing 500 g -was analyzed. There was no contamination by Salmonella and/or coliform, but the Staphylococcus quantification showed that 12 samples (80.0%) of the frozen and 10 (66.7%) of the fresh shrimp presented a bacterial load above 3.0 log 10 CFU g -1 -a limit recommended by the current legislation in Brazil. 17 drug-resistant staphylococci strains were isolated, and the following antimicrobial resistance profiles were detected: monoresistance (n=4), cross-resistance to beta-lactam (n=4), and multidrug resistance to: Oxacillin+ampicillin+tetracycline (n=1), oxacillin+tetracycline+ penicillin+chloramphenicol+vancomycin (n=1). The findings indicate that frozen and fresh shrimps may act as vehicles for the spread of staphylococci resistant to drugs of clinical interest.

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Section: Discussionsupporting

confidence: 59%

Drug-resistant bacteria in frozen and fresh marine shrimp

Macedo¹,

Marinho²,

Vasconcelos³

et al. 2016

Afr. J. Microbiol. Res.

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show abstract

“…However in Shanghai, Salmonella Wandsworth was the second most common serotype in retail aquaculture products. Salmonella Wandsworth was isolated from many different aquaculture products, except shellfish, showing its wide distribution in nature in Shanghai (Zhang et al , 2015). Multidrug resistance of the Salmonella isolates, particularly to ciprofloxacin and ceftriaxone, two clinically important antibiotics commonly prescribed for salmonellosis treatment, is alarming.…”

Section: Resultsmentioning

confidence: 99%

“…The detailed information, including Salmonella isolation, identification, and serotyping, was published previously (Zhang et al , 2015). …”

Section: Methodsmentioning

confidence: 99%

Turtles as a Possible Reservoir of Nontyphoidal Salmonella in Shanghai, China

Zhang

Kuang

Wang

et al. 2016

Foodborne Pathogens and Disease

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Terrapins and turtles are known to transmit Salmonella to humans. However, little was known about the occurrence of this pathogen in soft-shelled terrapin that is a popular delicacy in Chinese and other East Asian cuisines. We isolated and characterized 82 (24.4%) isolates of Salmonella from 336 fecal samples of soft-shelled terrapins (51 of 172; 29.7%) and pet turtles (31 of 164; 18.9%) in Shanghai. Salmonella Thompson was the most common serotype (17.1%) among others. Many isolates (84.1%) were resistant to multiple antimicrobials (≥3). Molecular analysis of Salmonella Thompson and Salmonella Typhimurium using pulsed-field gel electrophoresis unveiled a close genetic relationship between several human and terrapin isolates. Our results highlight the risk associated with the handling and consumption of turtles and their role in the spread of Salmonella in the human salmonellosis.

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“…Over half of these strains (58.75%) were isolated from human cases, whereas 24.37% were isolated from spiral shell. Our monitoring data, collected between 2006 and 2011 [7], demonstrated that S . Aberdeen could be enriched by spiral shells.…”

Section: Discussionmentioning

confidence: 99%

Molecular Characterization of Salmonella enterica Serovar Aberdeen Negative for H2S Production in China

Xie

et al. 2016

PLoS ONE

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Salmonella enterica infections continue to be a significant burden on public health worldwide. The ability of S. enterica to produce hydrogen sulfide (H2S) is an important phenotypic characteristic used to screen and identify Salmonella with selective medium; however, H2S-negative Salmonella have recently emerged. In this study, the H2S phenotype of Salmonella isolates was confirmed, and the selected isolates were subjected to antimicrobial susceptibility testing and molecular identification by multilocus sequence typing, pulsed-field gel electrophoresis, and clustered regularly interspaced short palindromic repeat (CRISPR) analysis. The phs genetic operon was also analyzed. A total of 160 S. enterica serovar Aberdeen isolates were detected between 2005 and 2013 in China. Of them, seven non-H2S-producing isolates were detected. Notably, four samples yielded four pairs of isolates with different H2S phenotypes, simultaneously. The data demonstrated that H2S-negative isolates were genetically closely related to H2S-positive isolates. Three new spacers (Abe1, Abe2, and Abe3) were identified in CRISPR locus 1 in four pairs of isolates with different H2S phenotypes from the same samples. Sequence analysis revealed a new nonsense mutation at position 208 in the phsA gene of all non-H2S-producing isolates. Additionally, we describe a new screening procedure to avoid H2S-negative Salmonella, which would normally be overlooked during laboratory and hospital screening. The prevalence of this pathogen may be underestimated; therefore, it is important to focus on improving surveillance of this organism to control its spread.

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Prevalence of antimicrobial resistance of non-typhoidal Salmonella serovars in retail aquaculture products

Cited by 51 publications

References 25 publications

Drug-resistant bacteria in frozen and fresh marine shrimp

Drug-resistant bacteria in frozen and fresh marine shrimp

Turtles as a Possible Reservoir of Nontyphoidal Salmonella in Shanghai, China

Molecular Characterization of Salmonella enterica Serovar Aberdeen Negative for H2S Production in China

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