alexa PCR typing of tetracycline resistance determinants (Tet A-E) in Salmonella enterica serotype Hadar and in the microbial community of activated sludges from hospital and urban wastewater treatment facilities in Belgium.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): Guillaume G, Verbrugge D, ChasseurLibotte M, Moens W, Collard J

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Abstract The distribution of tetracycline resistance determinants Tet A-E was studied by PCR in 40 tetracycline-resistant Salmonella enterica serotype Hadar (S. hadar) isolates collected from human patients in 1996 and 1997, as well as in the microbial community originating from activated sludges of hospital and urban wastewater treatment facilities. A fast DNA extraction and purification method from activated sludges was used to provide amplifiable DNA. The method is based on the direct lysis of bacteria improved by bead-beating followed by DNA purification on polyvinylpolypyrrolidone spin columns to remove PCR inhibitors. The purified DNAs from salmonellae and activated sludges were characterized for the presence of tetracycline determinants with specific primer pairs designed on the basis of published sequences. The Tet A determinant was present in all clinical isolates and DNAs extracted from the bacterial community of the selected activated sludges. The Tet C determinant was identified in only one of the 40 clinical isolates and in six of the seven environmental samples. No signal was detected for Tet B, D and E determinants. This study revealed a high and stable prevalence of the Tet A determinant in both salmonellae clinical isolates and the microbial community of activated sludges from hospital and urban wastewater treatment facilities over a 2-year period.
This article was published in FEMS Microbiol Ecol and referenced in Pharmaceutica Analytica Acta

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