Multiple Antibiotic Resistance in Escherichia coli Isolates from Fecal and Water Sources in Laguna Lake, Philippines

Due to the misuse and overuse of antibiotics, antibiotic residues accumulate in natural environments, leading to the development of antibiotic-resistant bacteria (ARBs). The presence of ARBs in bodies of water poses health hazards to the surrounding community. This study focused on Laguna Lake, the...

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Bibliographic Details
Published in:Water (Basel) 2022-05, Vol.14 (9), p.1517
Main Authors: dela Peña, Laurice Beatrice Raphaelle O., Nacario, Mae Ashley G., Bolo, Nicole R., Rivera, Windell L.
Format: Article
Language:English
Subjects:
Amikacin
Ampicillin
Antibiotic resistance
Antibiotics
Bacterial infections
Chickens
Drug resistance
E coli
Escherichia coli
Feces
Health hazards
Laboratories
Lakes
Multidrug resistance
PilA protein
Pollutants
Poultry
Reservoirs
Rivers
Sewage
Surface water
Tigecycline
Tributaries
Water analysis
Water bodies
Water quality
Water sampling
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Summary:Due to the misuse and overuse of antibiotics, antibiotic residues accumulate in natural environments, leading to the development of antibiotic-resistant bacteria (ARBs). The presence of ARBs in bodies of water poses health hazards to the surrounding community. This study focused on Laguna Lake, the largest lake in the Philippines, which serves as a water source for agriculture and domestic purposes. We aimed to detect the presence of antibiotic-resistant Escherichia coli from the lake waters and potential reservoirs of resistance as well as determine the multiple antibiotic resistance (MAR) indices of the isolates. E. coli (n = 450) was isolated from fecal-associated samples (chicken, cow, pig, human, sewage) and water samples (sites in Laguna Lake and selected river tributaries). The isolates were subjected to an antibiotic resistance assay using VITEK 2®. Among the 16 antibiotics tested, the isolates exhibited varying resistance to 14, but complete susceptibility to amikacin and tigecycline was observed. Isolates were most frequently resistant to ampicillin (196/450, 43.6%). Among fecal-associated samples, chicken isolates exhibited the highest MAR index (0.174), whereas samples from Pila River exhibited the highest MAR index (0.152) among water samples. The results of this study demonstrate the presence of multidrug-resistant E. coli in samples collected around Laguna Lake and reveal fecal and sewage sources as potential reservoirs of ARBs in the water body. With this information, the public is urged to use antibiotics responsibly to help mitigate the spread of antibiotic resistance.
ISSN:2073-4441
2073-4441
DOI:10.3390/w14091517