| Project/Area Number |
17406008
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Parasitology (including Sanitary zoology)
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| Research Institution | Kagawa University |
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Principal Investigator |
SUGURI Setsuo Kagawa University, Department of International Medical Zoology, Associate Professor (00032897)
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| Co-Investigator(Kenkyū-buntansha) |
KAWABATA Masato Kobe University, International Center for Medical Research, Professor (30175294)
SHIRAKAWA Toshiro Kobe University, International Center for Medical Research, Research Associate (70335446)
OHTA Nobuo Tokyo Medical and Dental University, Section of Environmental Parasitology, Professor (10143611)
OHASHI Makoto Tokushima University, Department of Mathematical and Natural Sciences, Professor (40128369)
FUJIMOTO Chigusa Kagawa Prefectural College of Health Sciences, Department of Medical Technology, Research Associate (90331868)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥13,500,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2007: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2006: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2005: ¥5,000,000 (Direct Cost: ¥5,000,000)
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| Keywords | Malaria / Control / Solomon Islands / Ultrasonic / Killing-machine |
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| Research Abstract |
The pilot areas were settled at Tamboko in Guadalcanal Island and at Fiu in Malaita Island.
By the molecular biological analysis, the species were determined as Anopheles farauti s.s. and Anopheles irenicus. The latter species was not caught by the human-bait collection and supposed to have no relation as malaria vector. Solomon sea has been shown to be a great barrier for gene-flow by the comparison of nucleotide sequences of mosquitoes between Solomon Islands and Papua New Guinea.
Human baiting activity has not so much difference between dry and rainy seasons in Guadalcanal Island but i n Malaita Island, the number in dry season was very few comparing to that in rainy season.
The parous rate was low (24%) before 11p.m. and high (80%) after 11p.m. at night in rainy season but it was constantly high (more than 55%) in dry season.
In Western region, no adult mosquito of anopheles was caught and the number of breeding places was very few. These are supposed to be the main reasons of low malaria patients in this region and will give some hints to discover new methods to control malaria.
The development of ultrasonic device was done as a new control method for mosquito. At the present state, a device was succeeded in developing which can kill all mosquito larvae at the distance of 90cm by five-second eradiation at 1200 watts. On the other hand, coconuts oil was also tried for the control. Coconuts oil poured at a mount of 100m1 per one square meter could kill mosquito larvae for 17 days.
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