Antimicrobial Resistance in Lactococcus spp. Isolated from Native Brazilian Fish Species: A Growing Challenge for Aquaculture

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Autor(es): dc.contributorNilton Lins University-
Autor(es): dc.contributorUniversidade Federal de Minas Gerais (UFMG)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorRosário, Angélica Emanuely Costa do-
Autor(es): dc.creatorBarbanti, Angelo Carlo Chaparro-
Autor(es): dc.creatorMatos, Helena Caldeira-
Autor(es): dc.creatorMaia, Cynthia Rafaela Monteiro da Silva-
Autor(es): dc.creatorTrindade, Júlia Miranda-
Autor(es): dc.creatorNogueira, Luiz Fagner Ferreira-
Autor(es): dc.creatorPilarski, Fabiana-
Autor(es): dc.creatorGallani, Silvia Umeda-
Autor(es): dc.creatorLeal, Carlos Augusto Gomes-
Autor(es): dc.creatorFigueiredo, Henrique César Pereira-
Autor(es): dc.creatorTavares, Guilherme Campos-
Data de aceite: dc.date.accessioned2025-08-21T19:51:52Z-
Data de disponibilização: dc.date.available2025-08-21T19:51:52Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/microorganisms12112327-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/301778-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/301778-
Descrição: dc.descriptionLactococcus spp. has emerged as a pathogen that is affecting global aquaculture, with L. garvieae, L. petauri, and L. formosensis causing piscine lactococcosis. While antimicrobials are commonly used to treat diseases in aquaculture, reports of antimicrobial resistance in fish isolates are increasing. However, little is known about the susceptibility patterns of Lactococcus spp. strains isolated from native fish species in Brazil. This study aimed to assess the antimicrobial susceptibility of these strains and establish a provisional epidemiological cutoff value for L. garvieae using the normalized resistance interpretation approach. A total of 47 isolates were tested: 17 L. garvieae, 24 L. petauri, and 6 L. formosensis. The isolates were classified as wild-type (WT) or non-wild-type (NWT) based on inhibition zone diameters. Isolates classified as NWT for three or more antimicrobial classes were considered multidrug-resistant, and the multiple antibiotic resistance (MAR) index was calculated. The results revealed heterogeneity in antimicrobial resistance profiles, with higher resistance to trimethoprim/sulfamethoxazole and norfloxacin. Resistance to other antimicrobials, including florfenicol and oxytetracycline (approved for use in Brazil), varied according to the bacterial species. Lactococcus petauri (87.5%) and L. formosensis (66.7%) showed the highest multidrug resistance, compared to L. garvieae (11.7%), along with higher MAR index values. These findings suggest that multidrug-resistant strains could pose future challenges in the production of native species, underscoring the need for ongoing monitoring of antimicrobial resistance and responsible use of antimicrobials in aquaculture.-
Descrição: dc.descriptionPost-Graduate Program in Aquaculture Nilton Lins University, AM-
Descrição: dc.descriptionDepartment of Preventive Veterinary Medicine School of Veterinary Medicine Federal University of Minas Gerais—UFMG, MG-
Descrição: dc.descriptionLaboratory of Microbiology and Parasitology of Aquatic Organisms Aquaculture Center of Unesp São Paulo State University (Unesp), SP-
Descrição: dc.descriptionLaboratory of Microbiology and Parasitology of Aquatic Organisms Aquaculture Center of Unesp São Paulo State University (Unesp), SP-
Idioma: dc.languageen-
Relação: dc.relationMicroorganisms-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectdisk diffusion-
Palavras-chave: dc.subjectepidemiological cutoff values-
Palavras-chave: dc.subjectfish-
Palavras-chave: dc.subjectpiscine lactococcosis-
Título: dc.titleAntimicrobial Resistance in Lactococcus spp. Isolated from Native Brazilian Fish Species: A Growing Challenge for Aquaculture-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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