Possibilities for disinfection of the developmental stages from the housefly (Musca domestica) were investigated under laboratory conditions. The developmental stages (eggs, larvae I, II, III, pupae and adults) were sprayed with solutions of disinfectants on the basis of p-chlorine-m-cresol and o-phenylphenol at different concentrations (0.025%-3%). The effectiveness of both disinfectants was established by determining the emergence rate of eggs and pupae and of the live evidence of larvae and adults. Transmission electron microscopic investigations of the cover of the eggs revealed the bactericidal effect of both disinfectants. These results show the necessity of extending its use also to noxious arthropods.

Animals↗

PubMedDate not supplied

[Promotion of wool growth and body weight development of sheep by alimentary supplementation with thiocyanate].

Adult sheep were administered 12 mg thiocyanate (SCN-)/kg body weight orally twice a year in altogether 16 respectively 41 single doses under conventional keeping during the period of stabling (winter) in two consecutive years. Fattening lambs got an analogous SCN- dosage with altogether 4 respectively 34 single doses under intensive keeping. Aided by this temporarily obtained balance of an alimentary SCN- deficiency the following effects were reached during conventional keeping: Significant increase of the wool mass in the greasy state and a tendency to better breading performance. During intensive fattening an increase of the wool mass and of the staple cross-section was proven statistically in the mean for all the test animals, but for the increase of the staple length it could be shown only by comparison of twins.

Aging↗

PubMedDate not supplied

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

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.

Animals↗