Antimicrobial susceptibility profiles of multidrug-resistant aeromonads isolated from Northern Portugal freshwater ecosystem.
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abstract
Extensive use of water and anthropogenic activities contribute to water body pollution.
Agricultural, urban, and animal waste, often characterized by numerous toxic and
carcinogenic chemicals, pathogenic bacteria, and antibiotics, as well as antibiotic resistance
genes (ARGs), loaded with microflora, can contaminate water and enter the food chain,
posing a considerable danger to public health [1,2]. The inappropriate use of antibiotics, one
of the causes of the high incidence of antimicrobial-resistant bacteria isolated from aquatic
ecosystems, represents a risk for aquatic organisms and the welfare of humans. Infectious
diseases, both human and animal, are closely related through the environment in the One
World - One Medicine - One Health concept, in order to deal with the growing problem of
antibiotic resistance. Aeromonas spp. can acquire antimicrobial resistance mechanisms, with
the potential to spread via horizontal gene transfer, so they could be a good candidate as an
indicator to follow antimicrobial resistance dissemination in water [3,4]. This study aimed to
determine the antimicrobial resistance rates among riverine Aeromonas spp., taken as
representative of the autochthonous microbiota, to evaluate the level of antibacterial
resistance in the Tua River (Douro basin).
