1) were trapped near Gimhae-si (City), Gyeongsangnam-do (Province) in April 2013 and transported alive to our laboratory where they were euthanized with ether. The present study examined the helminthic fauna of feral nutrias, in particular, a nematode, Strongyloides myopotami. Until now, no efforts have been made to monitor these diseases in Korea, particularly those transmitted by parasites. They are known as a host of parasites that can be transmitted to other animals, including humans Strongyloides myopotami, Schistosoma mansoni, Giardia lamblia, Taenia spp., and Fasciola hepatica. In addition, they are hosts to several zoonotic diseases caused by viruses, bacteria, and parasites. They have been known to damage crops, because of their burrowing habits, as well as water-saving systems such as reservoirs. Nutrias are herbivores, eating as much as 25% of their body weight per day. Although nutrias were considered to be maladapted to the Korean winter, they actually survived and spread to the south-eastern part of the Korean peninsula, parallel to the Nakdong-gang (River). However, many nutrias were eventually released into the wild because there was no sufficient demand for them and the maintenance cost was high (personal communication). In 1987, a further 60 nutrias were imported from Bulgaria and were successfully bred. A total of 100 nutrias were first imported to Korea from France in 1985, but they all died due to insufficient preparation of the environment required for them to adapt to the Korean winter. It is now present in North America, Europe, Africa, and Asia (including Korea) and is used as a source of fur and meat. The nutria ( Myocastor coypus) or coypu rat is a large rodent originally from South America.
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