Incidence of class 1 integrons in a quaternary ammonium compound-polluted environment
UNSPECIFIED. (2005) Incidence of class 1 integrons in a quaternary ammonium compound-polluted environment. ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, 49 (5). pp. 1802-1807. ISSN 0066-4804Full text not available from this repository.
Official URL: http://dx.doi.org/10.1128/AAC.49.5.1802-1807.2005
Samples of effluent and soil were collected from a reed bed system used to remediate liquid waste from a wool finishing mill with a high use of quaternary ammonium compounds (QACs) and were compared with samples of agricultural soils. Resistance quotients of aerobic gram-negative and gram-positive bacteria to ditallowdimethylammomium chloride (DTDMAC) and cetyltrimethylammonium bromide (CTAB) were established by plating onto nutrient agar containing 5 μ g/ml or 50 μ g/ml DTDMAC or CTAB. Approximately 500 isolates were obtained and screened for the presence of the intI1 (class 1 integrase), qacE (multidrug efflux), and qacE&UDelta; 1 (attenuated qacE) genes. QAC resistance was higher in isolates from reed bed samples, and class 1 integron incidence was significantly higher for populations that were preexposed to QACs. This is the first study to demonstrate that QAC selection in the natural environment has the potential to coselect for antibiotic resistance, as class 1 integrons are well-established vectors for cassette genes encoding antibiotic resistance.
|Item Type:||Journal Article|
|Subjects:||Q Science > QR Microbiology
R Medicine > RS Pharmacy and materia medica
|Journal or Publication Title:||ANTIMICROBIAL AGENTS AND CHEMOTHERAPY|
|Publisher:||AMER SOC MICROBIOLOGY|
|Official Date:||May 2005|
|Number of Pages:||6|
|Page Range:||pp. 1802-1807|
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