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ニワトリマラリア(Plasmodium gallinaceum)の無性型発育環及び生殖母体の周期的出現性と生存期間についての観察


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Title: ニワトリマラリア(Plasmodium gallinaceum)の無性型発育環及び生殖母体の周期的出現性と生存期間についての観察
Other Titles: Observations on the asexual life cycle and on the production and surviving period of gametocyte in Plasmodium gallinaceum
Authors: 常多, 勝巳
Authors (alternative): Tsuneda, Katsumi
Issue Date: 31-Mar-1974
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 16(1). p11-20, 1974
Abstract: Several observations were made on the gametocytes of an avian malaria, Plasmodium gallinaceum, to assess the surviving period and the biological activity (infectivity for mosquitoes). Results achieved were summarized below: From the counting of the parasites by the developmental stages in thin blood-films prepared every 6 hours for 4 or 5 days from infected fowls, the growth of the asexual form in the peripheral circulation showed a 36-hour cycle and the young ring forms demonstrated a peak in number around midnight or midday with a 36-hour interval. The mature gametocytes in blood fluctuated in number along the course of time and the cyclic pattern was found to be similar to that of the young ring forms. The number of the intact young ring forms in blood of an infected fowl tended to reduce immediately after the intramuscular injection of chloroquine (60 mg base/kg) to the fowl and was cleared around 48 hours later without showing any further cyclic pattern. While, the mature gametocytes kept nearly the constant level in number up to 12 hours after the chloroquine administration, then turned to a gradual decrease and disappeared within 60 hours after the chloroquine injection. The exflagellation of the mature gametocytes by the Petri-dish method, which would be an evidence for demonstrating the infectivity for vector mosquitoes, was demonstrated as long as the mature gametocytes could be found in blood.
URI: http://hdl.handle.net/10069/4154
ISSN: 03855643
Type: Departmental Bulletin Paper
Appears in Collections:Volume 16, No. 1

Citable URI : http://hdl.handle.net/10069/4154

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