Assessment of DDT contamination in house rat as a possible bioindicator in DDT-sprayed areas from Ethiopia and South Africa

作者：Yohannes Yared Beyene; Ikenaka Yoshinori; Ito Gengo; Nakayama Shouta M M; Mizukawa Hazuki; Wepener Victor; Smit Nico J; Van Vuren Johan H J; Ishizuka Mayumi^*

来源：Environmental Science and Pollution Research, 2017, 24(30): 23763-23770.

DOI：10.1007/s11356-017-9911-7

• DDT
• House rat
• Liver
• Risk assessment
• Ethiopia
• South Africa

Ethiopia and South Africa are among the few countries to still implement indoor residual spraying with dichloro-diphenyl-trichloroethane (DDT) for malaria vector control. In this study, we investigated the levels and ecological risks of DDT and its metabolites in liver tissues of house rat, as a sentinel animal, for providing an early warning system for public health and wildlife intervention from Ethiopia and South Africa. The results showed that Sigma DDT concentration ranged from 127 to 9155 mu g/kg wet weight, and the distribution order of DDT and its metabolites in the analyzed liver samples was p,p'-DDD > p,p'-DDE >> p,p'-DDT, o,p'-DDT, and o,p'-DDD. The risk assessment indicated a potential adverse impact on humans, especially for pregnant women and children, because they spend majority of their time in a DDT-sprayed house. The ecological assessment also showed a concern for birds of prey and amphibians like frogs. This study is the first report on DDT contamination in liver tissues of house rats from Ethiopia and South Africa, and henceforth, the data will serve as a reference data for future studies.

• 出版日期2017-10
• 单位西北大学