Analysis of results in detection of Crytosporidium parvum and Giardia lamblia from contaminated water.

Objective To investigate the contamination of Cryptosporidium parvum and Giardia lamblia in waste water in Shenzhen City. Methods Samples of post-treated wastewater were collected from 3 wastewater treatment plants in Shenzhen using the immunomagenetic asymphytous Gimsa coloration method.Parasitic protozoa Giardia lamblia stiles and Cryptosporidium parvum were detectcd by following steps:filtering,washing,magnetic isolation and staining. Results Giardia lamblia stiles and Cryptosporidium parvum were found in post-treated wastewater samples from 2 wastewater treatment plants. Conclusion The results indicate that the existing of Giardia lamblia stiles and Cryptosporidium parvum in the post-treated wastewater was the potential pollution source to surface water.