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  • Title: Quantitative analysis of microfilarial periodicity of Dirofilaria immitis in cats.
    Author: Nogami S, Murasugi E, Shimazaki K, Maeda R, Harasawa R, Nakagaki K.
    Journal: Vet Parasitol; 2000 Oct 01; 92(3):227-32. PubMed ID: 10962160.
    Abstract:
    Microfilarial periodicity of Dirofilaria immitis in the venous blood of infected cats was analyzed by a trigonometric model. Cats were infected by subcutaneous transplantation with 120-day-old juvenile D. immitis. Microfilariae in the blood were first observed 98 days after transplantation. Blood was collected at 4h intervals for a 24h period, and examinations were repeated five times in two cats. The calculated periodicity index was 75.1 and 50.3 in these two cats. The estimated hour of peak microfilarial density ranged from 1.00 to 2.84h. Thus, the periodicity of microfilariae of D. immitis in the blood of cats was characterized as nocturnally sub-periodic.
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