| helminth eggs in raw and treated wastewater in the islamic republic of iran. | to assess the type and load of helminths in wastewater and the quality of treatment, we examined the raw and treated wastewater of 8 wastewater treatment plants (wtp) in tehran and 2 in isfahan for the presence of helminth eggs during 2002-2003. wastewater samples obtained from both inlet and effluent of each treatment plant were examined on several occasions using the modified bailenger method. untreated entry wastewater in tehran wtps contained a larger variety of helminth eggs than those of i ... | 2006 | 17037231 |