RT Journal Article
T1 Multiresistant bacteria: invisible enemies of freshwater mussels
A1 Saavedra, Maria José
A1 Fernandes, Conceição
A1 Teixeira, Amílcar
A1 Álvarez Bermúdez, Xana
A1 Varandas, Simone
K1 3108.01 Bacterias
K1 2508.01 Erosión (Agua)
AB Freshwater mussels are among the most endangered groups of fauna anywhere in  world. The indiscriminate use of antibiotics has led to the emergence of resistant strains. These antibiotic-resistant bacteria play a key role in increasing the risk allied with the use of surface water and in spread of resistance genes. Two endangered freshwater mussel species, Margaritifera margaritifera and Potomida littoralis, were sampled at 4 sampling sites along a 50 km stretch of River Tua. Water samples were taken at same sites. Of the total of 135 isolates, 64.44% (39.26% from water and 25.19% from  mussels) were coliform bacteria. Site T1, with the lowest concentration of coliform  bacteria, and site T2 were the only ones where M. margaritifera was found. No E. coli isolates were found in this species and the pattern between water and mussels was similar. P. littoralis, which was present at T3/T4 sites, is the one that faces the highest concentration of bacterial toxins, which are found in treated wastewater effluents and around population centers. Sites T3/T4 have the isolates (water and mussels) with the highest resistance pattern, mainly to β-lactams. Water and P. littoralis isolates (T3/T4) showed resistance to penicillins and their combination with clavulanic acid, and to cephalosporins, precisely to a fourth generation of cephalosporin antibiotics. The  analysis provides important information on the risk to water systems, as well as the need to investigate possible management measures. It is suggested that future studies on the health status of freshwater bivalves should incorporate measures to indicate  bacteriological water quality.
PB Environmental Pollution
SN 02697491
YR 2022
FD 2022-02-15
LK http://hdl.handle.net/11093/2919
UL http://hdl.handle.net/11093/2919
LA eng
NO Environmental Pollution, 295: 118671 (2021)
NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
NO Fundação para a Ciência e a Tecnologia | Ref. UIDB/04033/2020
DS Investigo
RD 28-mar-2025