− | There is no effective drug against fish nematodes but drugs such as flubendazol, levamisole, mebendazole, trichlorphon and triclabendazole have been used. | + | There is no effective drug against all fish nematodes but drugs such as flubendazol, levamisole, mebendazole, trichlorphon and triclabendazole may be effective again some species. |