Inactivation and regrowth of antibiotic-resistant bacteria by PAA disinfection in the secondary effluent of a municipal wastewater treatment plant / 生物医学与环境科学(英文)
Biomedical and Environmental Sciences
;
(12): 865-868, 2013.
Article
in English
| WPRIM
| ID: wpr-247120
ABSTRACT
Inactivation and microbial regrowth of penicillin-, ampicillin-, cefalexin-, tetracycline-, chloramphenicol-, and rifampicin-resistant bacteria were studied to explore risks associated with selection and regrowth of antibiotic-resistant bacteria after PAA disinfection. The results showed that after exposure to 20 mg/L PAA for 10 min, inactivation of ampicillin-resistant bacteria reached 2.3-log, which was significantly higher than that of total heterotrophic bacteria with a decrease of 2.0-log. In contrast, inactivation of tetracycline- resistant bacteria was significantly less efficient, reaching only 1.1-log. Chloramphenicol-and tetracycline-resistant bacteria, as well as total heterotrophic bacteria regrew more than 10 fold compared to those in the untreated wastewater sample with 22 h stilling culture after exposure to 2 or 5 mg/L PAA as for 10 min. Selection and potential regrowth of tetracycline-and chloramphenicol-resistant bacteria are potential risks when utilizing PAA disinfection, which may induce the spread of specific antibiotic-resistant bacteria in reclaimed water.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Bacteria
/
Water Microbiology
/
Waste Disposal, Fluid
/
Disinfection
/
Water Purification
/
Wastewater
/
Anti-Bacterial Agents
Language:
English
Journal:
Biomedical and Environmental Sciences
Year:
2013
Type:
Article
Similar
MEDLINE
...
LILACS
LIS