Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination
Abstract Background Asymptomatic infections with sub-microscopic Plasmodium serve as a silent reservoir of disease, critical to sustaining a low level of remanent malaria in the population. These infections must be effectively identified and targeted for elimination. The sensitivity of light microsc...
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ftdoajarticles:oai:doaj.org/article:eb1f21b30b2d4bcb8fb1a3f29b392132 2023-05-15T15:16:27+02:00 Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination Jetsumon Sattabongkot Chayanut Suansomjit Wang Nguitragool Jeeraphat Sirichaisinthop Saradee Warit Montip Tiensuwan Sureemas Buates 2018-09-01T00:00:00Z https://doi.org/10.1186/s12936-018-2476-1 https://doaj.org/article/eb1f21b30b2d4bcb8fb1a3f29b392132 EN eng BMC http://link.springer.com/article/10.1186/s12936-018-2476-1 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-018-2476-1 1475-2875 https://doaj.org/article/eb1f21b30b2d4bcb8fb1a3f29b392132 Malaria Journal, Vol 17, Iss 1, Pp 1-12 (2018) Prevalence Asymptomatic Sub-microscopic Malaria Thailand Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2018 ftdoajarticles https://doi.org/10.1186/s12936-018-2476-1 2022-12-31T06:01:19Z Abstract Background Asymptomatic infections with sub-microscopic Plasmodium serve as a silent reservoir of disease, critical to sustaining a low level of remanent malaria in the population. These infections must be effectively identified and targeted for elimination. The sensitivity of light microscopy, the traditional method used for diagnosing Plasmodium infections, is frequently insufficient for detecting asymptomatic infections due to the low density of parasitaemia. The objective of this study was to explore the current prevalence of asymptomatic sub-microscopic Plasmodium carriages to evaluate the parasite reservoir amongst residents from 7 hamlets in Tak Province in northwestern Thailand using a highly sensitive molecular method. Methods Malaria infection was screened in a real-world setting from 3650 finger-prick blood specimens collected in a mass cross-sectional survey using light microscopy and loop-mediated isothermal amplification (LAMP). LAMP results were later confirmed in a laboratory setting in Bangkok using nested PCR, restriction enzyme digestion and DNA sequencing. The association of malaria infection with demographic factors was explored. Results Parasite prevalence was 0.27% (10/3650) as determined by microscopy. Sub-microscopic infection prevalence was 2.33% (85/3650) by LAMP. Of these, 30.6% (26/85) were infected with Plasmodium falciparum, 52.9% (45/85) with Plasmodium vivax, 2.4% (2/85) with Plasmodium malariae, 4.7% (4/85) with mixed P. falciparum and P. vivax, and 9.4% (8/85) had parasite densities too low for species identification. Asymptomatic carriages (T < 37.5 °C) accounted for 95% (76/80) of all sub-microscopic cases with the highest prevalence occurring in the subjects 31–45 years of age (p ≤ 0.035). Participants working on plantations or as merchants had an increased infection risk. Evaluation by microscopy identified 10.53% (10/95) of all Plasmodium infected participants. Conclusion Participants carrying asymptomatic Plasmodium infections with sub-microscopic parasite ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 17 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Prevalence Asymptomatic Sub-microscopic Malaria Thailand Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Prevalence Asymptomatic Sub-microscopic Malaria Thailand Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Jetsumon Sattabongkot Chayanut Suansomjit Wang Nguitragool Jeeraphat Sirichaisinthop Saradee Warit Montip Tiensuwan Sureemas Buates Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
topic_facet |
Prevalence Asymptomatic Sub-microscopic Malaria Thailand Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background Asymptomatic infections with sub-microscopic Plasmodium serve as a silent reservoir of disease, critical to sustaining a low level of remanent malaria in the population. These infections must be effectively identified and targeted for elimination. The sensitivity of light microscopy, the traditional method used for diagnosing Plasmodium infections, is frequently insufficient for detecting asymptomatic infections due to the low density of parasitaemia. The objective of this study was to explore the current prevalence of asymptomatic sub-microscopic Plasmodium carriages to evaluate the parasite reservoir amongst residents from 7 hamlets in Tak Province in northwestern Thailand using a highly sensitive molecular method. Methods Malaria infection was screened in a real-world setting from 3650 finger-prick blood specimens collected in a mass cross-sectional survey using light microscopy and loop-mediated isothermal amplification (LAMP). LAMP results were later confirmed in a laboratory setting in Bangkok using nested PCR, restriction enzyme digestion and DNA sequencing. The association of malaria infection with demographic factors was explored. Results Parasite prevalence was 0.27% (10/3650) as determined by microscopy. Sub-microscopic infection prevalence was 2.33% (85/3650) by LAMP. Of these, 30.6% (26/85) were infected with Plasmodium falciparum, 52.9% (45/85) with Plasmodium vivax, 2.4% (2/85) with Plasmodium malariae, 4.7% (4/85) with mixed P. falciparum and P. vivax, and 9.4% (8/85) had parasite densities too low for species identification. Asymptomatic carriages (T < 37.5 °C) accounted for 95% (76/80) of all sub-microscopic cases with the highest prevalence occurring in the subjects 31–45 years of age (p ≤ 0.035). Participants working on plantations or as merchants had an increased infection risk. Evaluation by microscopy identified 10.53% (10/95) of all Plasmodium infected participants. Conclusion Participants carrying asymptomatic Plasmodium infections with sub-microscopic parasite ... |
format |
Article in Journal/Newspaper |
author |
Jetsumon Sattabongkot Chayanut Suansomjit Wang Nguitragool Jeeraphat Sirichaisinthop Saradee Warit Montip Tiensuwan Sureemas Buates |
author_facet |
Jetsumon Sattabongkot Chayanut Suansomjit Wang Nguitragool Jeeraphat Sirichaisinthop Saradee Warit Montip Tiensuwan Sureemas Buates |
author_sort |
Jetsumon Sattabongkot |
title |
Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
title_short |
Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
title_full |
Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
title_fullStr |
Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
title_full_unstemmed |
Prevalence of asymptomatic Plasmodium infections with sub-microscopic parasite densities in the northwestern border of Thailand: a potential threat to malaria elimination |
title_sort |
prevalence of asymptomatic plasmodium infections with sub-microscopic parasite densities in the northwestern border of thailand: a potential threat to malaria elimination |
publisher |
BMC |
publishDate |
2018 |
url |
https://doi.org/10.1186/s12936-018-2476-1 https://doaj.org/article/eb1f21b30b2d4bcb8fb1a3f29b392132 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 17, Iss 1, Pp 1-12 (2018) |
op_relation |
http://link.springer.com/article/10.1186/s12936-018-2476-1 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-018-2476-1 1475-2875 https://doaj.org/article/eb1f21b30b2d4bcb8fb1a3f29b392132 |
op_doi |
https://doi.org/10.1186/s12936-018-2476-1 |
container_title |
Malaria Journal |
container_volume |
17 |
container_issue |
1 |
_version_ |
1766346744028725248 |