マスダ　ガク   Masuda Gaku   益田　岳    所属   医学部 医学科    職種   助教
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Humans frequently exposed to a range of non-human primate malaria parasite species through the bites of Anopheles dirus mosquitoes in South-central Vietnam.
掲載誌名	正式名：Parasites & vectors 略　 称：Parasit Vectors ISSNコード：17563305/17563305
掲載区分	国外
巻・号・頁	8,pp.376
著者・共著者	Maeno Yoshimasa, Quang Nguyen Tuyen, Culleton Richard, Kawai Satoru, Masuda Gaku, Nakazawa Shusuke, Marchand Ron P
発行年月	2015/07
概要	BACKGROUND:Recent studies have described natural human infections of the non-human primate parasites Plasmodium knowlesi and Plasmodium cynomolgi. In Southeast Asia, mosquitoes of the Anopheles leucosphyrus group bite both humans and monkeys in the forest and thus offer a possible route for Plasmodium species to bridge the species barrier. In this study we analysed the species composition of malarial sporozoites infecting the salivary glands of Anopheles dirus in order to determine their potential role as bridge vectors of Plasmodium parasites from monkeys to humans.METHODS:Mosquitoes were collected in the forest and forest fringe area of Khanh Phu commune by human-baited landing collection. Anopheles species were determined on the basis of morphologic features. Sporozoite-infected salivary glands were applied to filter paper and dried in an ambient atmosphere, before storage in closed vials at 4-6 °C. Detection and identification of Plasmodium species in salivary glands were carried out by nested-PCR of the small subunit ribosomal RNA gene.RESULTS:Six species of Plasmodium parasites were detected by PCR, of which P. vivax was the most common, followed by P. knowlesi, P. inui, P. cynomolgi, P. coatneyi and P. falciparum. Twenty-six of the 79 sporozoite infected mosquitoes showed multiple infections, most of which were a combination of P. vivax with one or more of the non-human primate Plasmodium species.CONCLUSIONS:These results suggest that humans overnighting in this forest are frequently inoculated with both human and non-human primate malaria parasites, leading to a situation conducive for the emergence of novel zoonotic malaria.
DOI	10.1186/s13071-015-0995-y
PMID	26178324