[Is feeding of green silage in areas with hog cholera in wild boar a danger for domestic swine herds? Experimental study].
In an experimental study we tested the survival of hog cholera virus (HCV) contained in pieces of muscular tissue and organs from experimentally infected swine after incubation in silage. In big (diameter greater than 20 cm) muscular pieces HCV survived even in excellent mineral acid silage (pH 3.8-4.0) after a storage of 5 months. On the other hand in smaller parts (musculature tissue, organs less than 20 cm diameter) we never found virulent HCV after 3 months of incubation. Independent of the size of the tested organs we did not find any virulent HCV in silage with pH 5.2 after 3 months. The results of our investigations show, that the feeding of green silage in areas with hog cholera among wild boar is a potential risk for the domestic swine population. In conclusion we propose to feed green silage to unvaccinated pigs in such areas only after a storage of 9 month.
Kaden
V
V
Friedrich-Loeffler-Institut für Tierseuchenforschung Insel Riems.
Fischer
U
U
Schwanbeck
U
U
Riebe
R
R
D000818:Animals; D000829:Animals, Domestic; D000835:Animals, Wild; D006691:Classical Swine Fever / Q000209:etiology*; D006692:Classical Swine Fever Virus / Q000254:growth & development*; D005516:Food Microbiology; D012820:Silage; D013552:Swine
Ist die Verfütterung von Grünfuttersilage in Gebieten mit Schweinepest beim Schwarzwild eine Gefahr für die Hausschweinebestände? Experimentelle Studie.