沃尔巴克氏体属细菌可减少疟原虫
摘要:约翰霍普金斯大学彭博公共卫生学院的研究人员发现,用不同的沃尔巴克氏体属细菌感染冈比亚按蚊可以显著减少疟原虫的数量,研究还发现,其中一种沃尔巴克氏体属细菌可以在蚊子吸血后将其快速杀死。该研究结果发表于5月19日的《公共科学图书馆-病原卷》。 "This is

摘要:约翰霍普金斯大学彭博公共卫生学院的研究人员发现,用不同的沃尔巴克氏体属细菌感染冈比亚按蚊可以显著减少疟原虫的数量,研究还发现,其中一种沃尔巴克氏体属细菌可以在蚊子吸血后将其快速杀死。该研究结果发表于5月19日的《公共科学图书馆-病原卷》。

Anopheles mosquitoes

Anopheles mosquitoes

"This is the first time anyone has shown that Wolbachia infections can reduce levels of the human malaria parasite (Plasmodium falciparum) in Anopheles mosquitoes," said Jason Rasgon, PhD, senior author of the study and associate professor with the Johns Hopkins Malaria Research Institute and the Bloomberg School's W. Harry Feinstone Department of Molecular Microbiology and Immunology.

For the study, Rasgon and his colleagues infected Anopheles gambiae mosquitoes with two different Wolbachia strains (wMelPop and wAlbB). After infection, Wolbachia disseminated widely in the mosquitoes and infected diverse tissues and organs. Wolbachia also seemed to actively manipulate the mosquito's immune system to facilitate its own replication. Both Wolbachia strains were able to significantly inhibit malaria parasite levels in the mosquito gut. Although not virulent in sugar-fed mosquitoes, the wMelPop strain killed most mosquitoes within a day after the mosquito was blood-fed.

"These experiments show that Wolbachia could be used in multiple ways to control malaria, perhaps by blocking transmission or by killing infected mosquitoes," said Rasgon.

Worldwide, malaria afflicts more than 225 million people. Each year, the disease kills nearly 800,000, many of whom are children living in Africa.

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