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Veterinary Pathology, Vol 22, Issue 2 177-183, Copyright © 1985 by American College of Veterinary Pathologists

ARTICLES

Liver changes, following diethylcarbamazine administration, in microfilaremic dogs infected with Dirofilaria immitis

R. H. Sutton, R. B. Atwell and P. F. Boreham

Livers of dogs which were microfilaremic due to infection with Dirofilaria immitis were studied after the administration of diethylcarbamazine. Most dogs had a severe shock-like clinical reaction. The main hepatic features were congestion and hemorrhage around the central vein and irregularly scattered foci of inflammation. The severity of the vascular reaction was associated with the number of microfilariae in the livers. Mast cells associated with the vascular reaction were not degranulated, suggesting that histamine-mediated anaphylaxis was not the cause of the reaction. The observations suggest that the mediator of the hepatic vascular reaction originates from the microfilariae and is influenced or activated by diethylcarbamazine.




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Copyright © 1985 by the American College of Veterinary Pathologists.