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Transmission Dynamics of Dirofilaria immitis in a Southwestern Part of Japan


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Title: Transmission Dynamics of Dirofilaria immitis in a Southwestern Part of Japan
Authors: Wada, Yoshito / Tsuda, Yoshio / Suenaga, Osamu
Issue Date: 31-Mar-1989
Publisher: 長崎大学熱帯医学研究所 / Institute of Tropical Medicine, Nagasaki University
Citation: 熱帯医学 Tropical medicine 31(1). p35-47, 1989
Abstract: The transmission dynamics of Dirofilaria immitis were studied by using reported data in Nagasaki City and Omura City, Japan. The catalytic model was applied to the age distribution of positive rate for microfilariae of D. immitis in dogs. Using the force of infection obtained by applying the catalytic model, the critical vector density for the disappearance of D. immitis was estimated. Transmission frequencies of D. immitis in the two places were calculated by densities and infective rates of the principal vector, Culex pipiens pallens, and numbers of infective larvae of D. immitis in the vector. Roles of some factors influencing the transmission frequency of D. immitis were also evaluated with a simple mathematical model, and it was concluded that the continuation of extensive infection with D. immitis in dogs in spite of the presumed decrease of the vector density in recent years is ascribable to the increase of dog density and the increased protection of humans from mosquito bites.
URI: http://hdl.handle.net/10069/4542
ISSN: 03855643
Type: Departmental Bulletin Paper
Appears in Collections:Volume 31, No. 1

Citable URI : http://hdl.handle.net/10069/4542

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