A Study on Echinococcosis/Hydatosis in Animals

A.STOYANOV1, D. DIMANOV2, J. MITEV2, and S. GEORGIEV2

1 Thracian University, Faculty of Veterinary Medicine, BG 6000 Stara Zagora, Bulgaria
2 Thracian University, Faculty of Agriculture, BG 6000 Stara Zagora, Bulgaria

Abstract

STOYANOV, A., D. DIMANOV, J. MITEV, and S. GEORGIEV, 1999. A study on echinococcosis/hydatosis in animals. Bulg. J. Agric. Sci., 5: 659-662

During the last few years the echinococus disease appears as a big social and economical problem. Mainly stray dogs propagate the disease. From 1968 to 1986 the total number of registered in Bulgaria was between 60 000 to 100 000. Only 20-30% (12 000 20 000) of them were abandoned. Now their number only in Sofia is over 60 000. Parallel with this the per cent of the affected by parasites with echinococci animals increased.
In 1992 after the examination in slaughterhouses, parasites in 26-40% of the sheep were founded, 0.95-1.15% in pigs and 0.75-2% in cattle. During the studied period these percentage is higher and in some sheep 90% of them were affected by parasites (echinococus cysts).
The localization of the parasites was mainly established in the liver (52-53%) in the sheep and pigs 28-30% in the lungs and in 17-20% of the cases in both organs, In cattle lung is more affected 58%. This leads to large economic losses as a result of confiscation of big quantities of internal organs of slaughtered animals.
It was concluded that the dogs were the main cause in the epizootology of the echinococcosis. The situation would be better if the number of stray dogs was lower and their access to internal organs of animals affected by echinococcus after slaughtering was strongly limited

Key words: echinococcosis, animals, stray dogs, slaughterhouse control