Publication:
Malaria cross-sectional surveys identified asymptomatic infections of Plasmodium falciparum, Plasmodium vivax and Plasmodium knowlesi in Surat Thani, a southern province of Thailand

Issued Date

2020-07-01

Resource Type

Article

ISSN

18783511
12019712

DOI

10.1016/j.ijid.2020.05.022

Other identifier(s)

2-s2.0-85085552340

Rights

Mahidol University

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SCOPUS

Bibliographic Citation

International Journal of Infectious Diseases. Vol.96, (2020), 445-451

Suggested Citation

Shoichi Shimizu, Sadudee Chotirat, Nichakan Dokkulab, Isarachai Hongchad, Kessuda Khowsroy, Kirakorn Kiattibutr, Nongnuj Maneechai, Khajohnpong Manopwisedjaroen, Pattamaporn Petchvijit, Kanit Phumchuea, Nattawan Rachaphaew, Piyarat Sripoorote, Chayanut Suansomjit, Waraporn Thongyod, Amnat Khamsiriwatchara, Saranath Lawpoolsri, Borimas Hanboonkunupakarn, Jetsumon Sattabongkot, Wang Nguitragool Malaria cross-sectional surveys identified asymptomatic infections of Plasmodium falciparum, Plasmodium vivax and Plasmodium knowlesi in Surat Thani, a southern province of Thailand. International Journal of Infectious Diseases. Vol.96, (2020), 445-451. doi:10.1016/j.ijid.2020.05.022 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/58071

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Title

Malaria cross-sectional surveys identified asymptomatic infections of Plasmodium falciparum, Plasmodium vivax and Plasmodium knowlesi in Surat Thani, a southern province of Thailand

Author(s)

Shoichi Shimizu
 Sadudee Chotirat
 Nichakan Dokkulab
 Isarachai Hongchad
 Kessuda Khowsroy
 Kirakorn Kiattibutr
 Nongnuj Maneechai
 Khajohnpong Manopwisedjaroen
 Pattamaporn Petchvijit
 Kanit Phumchuea
 Nattawan Rachaphaew
 Piyarat Sripoorote
 Chayanut Suansomjit
 Waraporn Thongyod
 Amnat Khamsiriwatchara
 Saranath Lawpoolsri
 Borimas Hanboonkunupakarn
 Jetsumon Sattabongkot
 Wang Nguitragool

Other Contributor(s)

Mahidol University

Abstract

© 2020 The Authors Objectives: Malaria cross-sectional surveys are rarely conducted in very low transmission settings. This study aimed to determine the prevalence and risk factors of Plasmodium infection in a near-elimination setting in southern Thailand. Methods: Two cross-sectional surveys were conducted in areas of active transmission in the Surat Thani province of Thailand in January and May 2019. PCR was used to detect Plasmodium infection. Results: The prevalence of Plasmodium blood infection was 0.45% and 0.61% in January and May 2019, respectively. The major parasite species was Plasmodium falciparum in January and Plasmodium vivax in May. Unexpectedly, Plasmodium knowlesi infections were also detected. Most infections, including those of Plasmodium knowlesi, were asymptomatic. Being male and staying outdoors at night-time were the only significant identified risk factors. Of people infected in January 28.0% were positive in May for the same parasite species, suggesting persistent asymptomatic infections. Conclusions: Despite the very low incidence rate in Surat Thani, most malaria infections were asymptomatic. Outdoor mosquito biting at night-time is likely an important mode of malaria transmission. Unexpectedly, asymptomatic Plasmodium knowlesi infection was found, confirming previous reports of such infection in mainland Southeast Asia.

Keyword(s)

Medicine

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/58071

Collections

Scopus 2020