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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1990-7-5
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pubmed:abstractText |
Man-biting collections were made for 7 consecutive nights per month for 24 months at 2 sites in a Thai village regularly treated with DDT and fenitrothion yet hyperendemic for Plasmodium falciparum and P. vivax. Only Anopheles dirus was incriminated as a vector: 1.6% were infective and 2.4% were infected (median numbers of oocysts = 3.5). Transmission occurred within the village, which was located in groves of rubber and fruit trees, during the dry months of November to May only, when rates of parity (64%) and biting (2/man-night) were higher than during the monsoon (38% and 0.8%/man-night). Vectorial capacity and inoculation rates surged and then fell during 30 d at the end of the monsoon, quickly reinitiating transmission. Sporozoite species were identified using indirect fluorescent antibody tests or enzyme-linked immunosorbent assays: 76% were P. falciparum, compared to 78% of gametocytes; one mosquito was infected with both species. Vector survival and inoculation rates differed between similar sites 800 m apart. Dry season breeding occurred at the bottom of a deep, concrete-lined well. Much of the natural forest habitat of An. dirus in south-eastern Thailand that was once destroyed for farming is now being replaced with orchards; this ecological change may reintroduce malaria to a wide area.
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pubmed:commentsCorrections | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:issn |
0035-9203
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
84
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
22-8
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pubmed:dateRevised |
2004-11-17
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pubmed:meshHeading |
pubmed-meshheading:2189240-Animals,
pubmed-meshheading:2189240-Anopheles,
pubmed-meshheading:2189240-Humans,
pubmed-meshheading:2189240-Insect Vectors,
pubmed-meshheading:2189240-Malaria,
pubmed-meshheading:2189240-Plasmodium falciparum,
pubmed-meshheading:2189240-Plasmodium vivax,
pubmed-meshheading:2189240-Seasons,
pubmed-meshheading:2189240-Thailand
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pubmed:articleTitle |
Highly efficient dry season transmission of malaria in Thailand.
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pubmed:affiliation |
Department of Entomology, Walter Reed Army Institute of Research, Washington, DC.
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pubmed:publicationType |
Journal Article
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