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Microbiological analysis of skin lesions of cod (Gadus morhua) from the southern part of the Baltic Sea

Agnieszka Pękala-Safińska

Agnieszka Pękala-Safińska

Department of Preclinical Sciences and Infectious Diseases, Faculty of Veterinary Medicine and Animal Science, Poznań University of Life SciencesPoznań, Poland
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Pękala-Safińska, Agnieszka
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Katarzyna Nadolna-Ałtyn

Katarzyna Nadolna-Ałtyn

Department of Fisheries Resources, National Marine Fisheries Research InstituteGdynia, Poland
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Nadolna-Ałtyn, Katarzyna
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Mirosław Różycki

Mirosław Różycki

Department of Preclinical Sciences and Infectious Diseases, Faculty of Veterinary Medicine and Animal Science, Poznań University of Life SciencesPoznań, Poland
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Różycki, Mirosław
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Ewa Paździor

Ewa Paździor

Department of Fish Diseases, National Veterinary Research InstitutePuławy, Poland
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Paździor, Ewa
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Tomasz Cencek

Tomasz Cencek

Department of Parasitology and Invasive Disease, National Veterinary Research InstitutePuławy, Poland
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Cencek, Tomasz
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Magdalena Podolska

Magdalena Podolska

Department of Fisheries Resources, National Marine Fisheries Research InstituteGdynia, Poland
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Podolska, Magdalena
  
23 mar 2024
Microbiological analysis of skin lesions of cod (Gadus morhua) from the southern part of the Baltic Sea's Cover Image
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Pubblicato online: 23 mar 2024
Pagine: 79 - 92
Ricevuto: 21 lug 2023
Accettato: 17 gen 2024
DOI: https://doi.org/10.2478/jvetres-2024-0004
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© 2024 Agnieszka Pękala-Safińska et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction

Since the middle of the 1980s, severe skin disorders have been observed in Baltic cod (Gadus morhua) each year. Available data on the spectrum of bacteria isolated from the clinical cases being limited, and evaluation of the microbial background of fish skin lesions being useful, a bacteriological examination has been undertaken.

Material and Methods

A total of 1,381 cod were caught during two voyages of the Baltica research vessel in the Polish exclusive economic zone of the southern Baltic Sea. After an examination which found lesions in 164 of the fish, a microbiological analysis was performed to isolate bacteria from them. The collected strains were phenotyped and genotyped, and their antimicrobial resistance was analysed by minimum inhibitory concentration (MIC) techniques.

Results

Bacteriological examinations provided 850 isolates. The dominant microorganisms were mesophilic Aeromonas spp., Pseudomonas spp. and Shewanella baltica. Opportunistic bacteria potentially hazardous to human health were also isolated, e.g. Alcaligenes faecalis, Staphylococcus epidermidis, Stenotrophomonas maltophilia and Vibrio sp. The MIC analysis determined the highest number of bacteria to resist sulphamethoxazole and amoxicillin and clavulanic acid.

Conclusion

Most of the collected bacteria were opportunistic pathogens for fish, widespread in the aquatic environment, and potentially threatening to humans.
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Scienze biologiche, Biologia molecolare, Microbiologia e virologia, Scienze della vita, altro, Medicina, Medicina veterinaria
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