Gulls in Porto Coastline as Reservoirs for Salmonella spp. : Findings from 2008 and 2023

Gulls act as intermediaries in the exchange of microorganisms between the environment and human settlements, including Salmonella spp. This study assessed the antimicrobial resistance and molecular profiles of Salmonella spp. isolates obtained from fecal samples of gulls in the city of Porto, Portugal, in 2008 and 2023 and from water samples in 2023. Antimicrobial susceptibility profiling revealed an improvement in the prevalence (71% to 17%) and antimicrobial resistance between the two collection dates. Two isolate collections from both 2008 and 2023 underwent serotyping and whole-genome sequencing, revealing genotypic changes, including an increased frequency in the monophasic variant of S. Typhimurium. qacE was identified in 2008 and 2023 in both water and fecal samples, with most isolates exhibiting an MDR profile. The most frequently observed plasmid types were IncF in 2008 (23%), while IncQ1 predominated in 2023 (43%). Findings suggest that Salmonella spp. circulate between humans, animals, and the environment. However, the genetic heterogeneity among the isolates from the gulls' feces and the surface water may indicate a complex ecological and evolutionary dynamic shaped by changing conditions. The observed improvements are likely due to measures to reduce biological contamination and antimicrobial resistance. Nevertheless, additional strategies must be implemented to reduce the public health risk modeled by the dissemination of pathogens by gulls.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:12

Enthalten in:

Microorganisms - 12(2023), 1 vom: 28. Dez.

Sprache:

Englisch

Beteiligte Personen:

Rodrigues, Inês C [VerfasserIn]
Cristal, Ana Paula [VerfasserIn]
Ribeiro-Almeida, Marisa [VerfasserIn]
Silveira, Leonor [VerfasserIn]
Prata, Joana C [VerfasserIn]
Simões, Roméo [VerfasserIn]
Vaz-Pires, Paulo [VerfasserIn]
Pista, Ângela [VerfasserIn]
Martins da Costa, Paulo [VerfasserIn]

Links:

Volltext

Themen:

Antimicrobial resistance
Gulls
Journal Article
Laurus spp.
Multidrug-resistant bacteria
Salmonella spp.
Seagulls
Serotyping
Whole-genome sequencing

Anmerkungen:

Date Revised 29.01.2024

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/microorganisms12010059

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM367483777