Study of the microfilaremic variation in dogs with Dirofilaria immitis
Keywords:Dirofilaria, Dogs, Dirofilaria immitis, Microfilariae
The periodicity of Dirofilaria immitis microfilariae was studied in 15 adult dogs, purebred or crossbred, males and females. The circulating microfilariae counting was performed according to ANGUS1 (1981). The variation of the microfilaremia was observed during a period of 24 hours, being the blood samples collected with 2 hour intervals. Six of them were submitted to two material collections, one on a warm day, with mean temperature of 23°C, and the other one on a cool day, with mean temperature of 16°C. Analyzing the obtained results it is possible to state that the microfilariae of Dirofilaria immitis present an oscillation, however it is variable and there is not a fixed pattern. It is also true that once present the microfilaremia does not disappear in a subsequent collection, making it not difficult to diagnose this parasitosis.
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