The Thai Journal of Veterinary Medicine


The microfilarial level in the peripheral blood of cats naturally infected with Brugia pahangi in Bangkok area was monitored at two-hour intervals for 24 hours. Thick smear of blood films were stained with Giemsa and counted for microfilarial number. The microfilarial periodicity pattern showed nocturally subperiodic with a periodicity index of 48.81 and the peak hour at 23.16 hours. It was also found that the microfilariae appeared in the peripheral blood as a harmonic wave.

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