Abstract
Seven dogs free from Dirofilaria immitis (group 1) and 5 dogs infected with this parasite (group 2) were injected intravenously with such amount of eggs as contained in the uterus of one worm of this parasite or onehalf of this amount per kg of body weight. These eggs had been suspended in physiological saline. All the dogs manifested severe symptoms immediately after injection. Finally, 2 dogs of group 1 and 3 dogs of group 2 died within 3 hours after injection. One dog of this group succumbed 4 days after injection.
Chest X-ray examination revealed homogeneous shadows on the dorsal side. This finding was more conspicuous in group 2 than in group 1. There were many eggs blocking capillaries in the lung.
