| Project/Area Number |
13576010
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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 |
寄生虫学(含医用動物学)
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| Research Institution | Nagasaki University |
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Principal Investigator |
SHIMANADA Masaaki Nagasaki University, Institute of Tropical Medicine, Professor, 熱帯医学研究所, 教授 (70124831)
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| Co-Investigator(Kenkyū-buntansha) |
KANEDA Eiko Nagasaki University, Institute of Tropical Medicine, Assistant Professor, 熱帯医学研究所, 助手 (10253626)
ATAKA Yuji Nagasaki University, Institute of Tropical Medicine, Assistant Professor, 熱帯医学研究所, 助手 (50336187)
MOJI Kazuhiko Nagasaki University, Institute of Tropical Medicine, Professor, 熱帯医学研究所, 教授 (80166321)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 2003: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2002: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Human behavior / Schistosomiasis / Schistosoma mansoni / Global Positioning System / Easy Africa / Tanzania / 固体識別 / マンソン住血吸虫症 / GPS(全地球測位システム) / 行動観察 / 個体識別 |
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| Research Abstract |
Estimations of exposure do cercarial infested water are critical for epidemiological and immunological studies in a schistosomiasis endemic area. Questionnaire surveys have been used to estimate water exposures, addressing frequency of water contact only, due to its cost鋲lfectiveness and less labor-intensiveness. Direct, observation needs more cost. and time, but it provides more accurate exposure information. We compared the results of 24-hour recall method (by daily interview) with direct observation method for clarifying whether 104 schoolchildren living in Lower Moshi area, a Schislosoma rnansoni endemic area, of Tanzania could accurately recall their water exposures. Individual tracing method was applied to obtain detailed direct observation data for all water contact behaviors, and, on the following clay, interview was carried out. to collect. corresponding information on all contact behaviors. Exposure index was calculated by contact duration and intensity of exposure (percent b
… More
ody surface area) using Lund and Browcler burn chart.. The most. critical water contact behavior for the infection was swimming/playing in the river and canal among schoolchildren. They used safe water, in most, cases, from the tap or well for bathing purpose. We found a significantly smaller frequency but longer duration of water contact, in the recall data than directly observed data. For the risk water contacts, the exposure index (%min/dny) of water contacts obtained by recall method were significantly higher than that of direct observation. The 24-hour recall data was significantly correlated with the exposure index of direct observation : more strongly among boys than girls. Although the values of the exposure index are significantly higher in the recall data and should be corrected in practice, this results shows a possibility of replacing direct observation data by detailed recall data. The 24 hour recall niethocl is a practical instrument to accurately quantify water exposure in Lower Moshi area where S. mansoni has been endemic. Less
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