Title: TOXICITY OF HEAVY METALS CADMIUM AND ZINC TO CERCARIA OF SCHISTOSOMA JAPONICUM
Abstract: Objective To observe the toxicity of cadmium and zinc to cercaria of Schistosoma japonicum. Methods Forty to fifty cercariae were placed in the solutions with different concentrations (100, 10, 1, 0.1 mg/L) of cadmium, zinc and both metals mixture. They were observed by dissecting microscope every 30 minutes. The pattern changes and the number of survival were recorded at the same time. Results In the solutions with concentrations of 10 mg/L and 100 mg/L of cadmium, zinc and both metals mixture, the rate of cercariae breaking tails and mortality were obviously higher than that of controls(P0.01 or P0.05) in the same observing time, and the rate of cercariae breaking tails and mortality increased with concentration . The toxicity to cercaria of S. japonicum was the strongest in the mixture of two heavy metals. Conclusion The single or mixture of heavy metal cadmium and zinc has significant toxicity to cercaria of S. japonicum, the toxicity increased with concentration.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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