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Nutrición Hospitalaria

On-line version ISSN 1699-5198Print version ISSN 0212-1611


LI, Chaopin; WU, Hua; SUN, Entao  and  ZHU, Yuxia. Investigation on the endemic characteristics of Metorchis orientalis in Huainan area, China. Nutr. Hosp. [online]. 2017, vol.34, n.3, pp.675-679. ISSN 1699-5198.


To investigate the endemic characteristics of Metorchis orientalis (M. orientalis) in the Huainan area, Anhui province, China.


The first-intermediate host, second-intermediate host and reservoir hosts were collected, and the endemic characteristics of M. orientalis were examined through field investigation and artificial infection.


Investigation was completed in 89 domestic ducks, 156 domestic chicken, 41 domestic geese, 20 domestic cats and 19 dogs. The infection rate of M. orientalis was 18.0% (16/89) in ducks, 12.2% (19/156) in chicken, 9. 8% (4/41) in geese, 5.0% (1/20) in cats and 5.3% (1/19) in dogs. Sixty-seven cercariae of M. orientalis were identified in 1,000 Parafossarulus striatulus, with a natural infection rate of 6.7%, and 19 cercariae occurred in 300 Pseudorasbora parva, with a natural infection rate of 6.33%. The activity of the cercariae of M. orientalis was associated with light intensity and temperature. The full life cycle of M. orientalis ranged from 120 to 140 days; it occurred approximately in 89 days in snails, 28 days in fish and 20 days in ducks.


M. orientalis is prevalent in the Huainan area, and it may complete its life cycle in Parafossarulus striatulus, Pseudorasbora parva and natively raised ducks.

Keywords : Metorchis orientalis; Endemic characteristics; Huainan area.

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