ArticleBMC veterinary research2025
Prevalence and antimicrobial resistance profile of Listeria spp. isolated from raw fish.
Article in BMC veterinary research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
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11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Predicting Antibiotic Resistance inInternational journal of molecular sciences · 2025Pooled it
- Occurrence, Species Distribution, and Antimicrobial Resistance ofMicroorganisms · 2026Article
- Comparative characterization of Listeria monocytogenes strains isolated from plant and animal-derived foods for their virulence, biofilm formation and antibiotic susceptibility.Archives of microbiology · 2026Article
- Molecular Characterization, Virulence Profiling, and Antimicrobial Susceptibility ofFoods (Basel, Switzerland) · 2026Article
- Efficacy of Cannabidiol in Reducing Virulence ofInternational journal of molecular sciences · 2026Article
- Genomic Features and Antimicrobial Susceptibility ofFoods (Basel, Switzerland) · 2026Article
- Virulence, cytotoxicity potential and biofilm production ability of Listeria spp. isolated from raw fish in Poland.BMC veterinary research · 2026Article
- Genomic insights intoFrontiers in microbiology · 2026Article
- Article
- Gene profiling and serotyping of multidrug-resistant Listeria monocytogenes isolated from humans, animals, and dairy products.BMC veterinary research · 2025Article
- Virulence Gene Profiling and Molecular Typing of Clinical Isolates ofInfection and drug resistance · 2025Article
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Abstract
backgroundListeria spp. contamination in food, particularly antimicrobial-resistant strains, poses an escalating concern for public health. This study investigated the prevalence and antimicrobial resistance profiles of Listeria spp. isolated from raw fish collected from diverse sources in Northern Poland.
methodsA total of 750 raw fish samples were collected from standing freshwater tanks, flowing freshwater reservoirs, and a saltwater reservoir. Isolation was performed following the standard protocol, which describes the horizontal method for detecting Listeria spp., including Listeria monocytogenes. The antimicrobial resistance profiles of isolated strains were performed using the disk diffusion method. Antimicrobial resistance genes were identified using PCR, targeting 11 genes associated with resistance to β-lactams, macrolides, glycopeptides, and sulfonamides. Statistical analyses included Phi correlation coefficients, hierarchical clustering, and logistic regression to examine associations between phenotypic resistance patterns and antimicrobial resistance genes.
resultsListeria spp. was isolated from 13.9% of samples (104 positive samples), comprising L. seeligeri (34.6%), L. welshimeri (28.8%), L. monocytogenes (23.1%), and L. innocua (13.5%). Phenotypic antimicrobial susceptibility testing revealed universal resistance to oxacillin (100%) across all Listeria spp. isolates. High resistance levels were also observed for cefotaxime (97.1%), cefoxitin (92.3%), rifampicin (92.3%), clindamycin (96.2%), and trimethoprim-sulfamethoxazole (91.3%). Alarmingly, 98.1% of all Listeria spp. isolates exhibited multidrug resistance (MDR), reaching 100% MDR among L. monocytogenes isolates. Specifically, L. monocytogenes isolates exhibited complete resistance to meropenem, cefoxitin, cefotaxime, rifampicin, and trimethoprim-sulfamethoxazole, and significant resistance to ciprofloxacin (91.7%), clindamycin (83.3%), tetracycline (75.0%), erythromycin (75.0%), benzylpenicillin (70.8%), and nitrofurantoin (70.8%). Molecular analysis identified blaTEM (100%), ampC (37.5%), and ereB (37.5%) as the most prevalent antimicrobial resistance genes in L. monocytogenes.
conclusionsThe exceptionally high prevalence of multidrug-resistant Listeria spp., particularly L. monocytogenes, in raw fish underscores a critical public health risk, suggesting the urgent need for ongoing surveillance and robust risk mitigation strategies in aquaculture and seafood processing. The elevated antimicrobial resistance levels may also indicate aquatic environmental contamination, warranting further investigation into the sources and broader ecological implications of antimicrobial resistance in these ecosystems.
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