[The effectiveness of different disinfectants based on p-chloro-m-cresol against Ascaris suum eggs under laboratory conditions].

Abstract The devitalizing effectiveness of 5 patterns of the disinfectant Neopredisan (active principle: p-chlorine-m-cresol) was tested to eggs of Ascaris suum in coincidence with the "guidelines for the testing of chemical disinfectants" of the German Veterinary Society (GVS). In the suspension-test all examined patterns indicated a 100% inhibition of development Ascaris suum-eggs. In the germ carrier test all patterns were in conformity with the necessities of the GVS-guidelines. Also in the modified testing method with a temperature in the refrigerator of +10 degrees C Neopredisan showed a reliable (100%) efficacy. The inhibition of development was clearly delayed with an admixture of 20% faeces to the suspension of eggs. In a suspension-test with Neopredisan 140 in 3% solution after 15 minutes with embryonated eggs a nearly 100% ovicide and larvicide respectively efficacy was proved. The investigations show, Neopredisan is of value as a suitable disinfectant in the complex of the combat against ascariasis in the breeding of pigs.