| toxigenic clostridium difficile pcr ribotypes from wastewater treatment plants in southern switzerland. | the occurrence of clostridium difficile in nine wastewater treatment plants in the ticino canton (southern switzerland) was investigated. the samples were collected from raw sewage influents and from treated effluents. forty-seven out of 55 characterized c. difficile strains belonged to 13 different reference pcr ribotypes (009, 010, 014, 015, 039, 052, 053, 066, 070, 078, 101, 106, and 117), whereas 8 strains did not match any of those available in our libraries. the most frequently isolated ri ... | 2012 | 22798376 |