Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat?
In this study, we determined whether the treatment of asymptomatic parasites carriers (APCs), which are frequently found in the riverside localities of the Brazilian Amazon that are highly endemic for malaria, would decrease the local malaria incidence by decreasing the overall pool of parasites ava...
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ftdoajarticles:oai:doaj.org/article:a2efcf6957ce4e9bba94940adc9920df 2023-05-15T15:07:34+02:00 Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? Mauro Shugiro Tada Ricardo de Godoi Mattos Ferreira Tony Hiroshi Katsuragawa Rosimeire Cristina Dalla Martha Joana D’Arc Neves Costa Letusa Albrecht Gerhard Wunderlich Luiz Hildebrando Pereira da Silva 2012-08-01T00:00:00Z https://doi.org/10.1590/S0074-02762012000500008 https://doaj.org/article/a2efcf6957ce4e9bba94940adc9920df EN eng Instituto Oswaldo Cruz, Ministério da Saúde http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762012000500008&lng=en&tlng=en https://doaj.org/toc/1678-8060 1678-8060 doi:10.1590/S0074-02762012000500008 https://doaj.org/article/a2efcf6957ce4e9bba94940adc9920df Memórias do Instituto Oswaldo Cruz., Vol 107, Iss 5, Pp 621-629 (2012) malaria asymptomatic parasite carriers Amazon Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 article 2012 ftdoajarticles https://doi.org/10.1590/S0074-02762012000500008 2023-01-08T01:26:09Z In this study, we determined whether the treatment of asymptomatic parasites carriers (APCs), which are frequently found in the riverside localities of the Brazilian Amazon that are highly endemic for malaria, would decrease the local malaria incidence by decreasing the overall pool of parasites available to infect mosquitoes. In one village, the treatment of the 19 Plasmodium falciparum-infected APCs identified among the 270 residents led to a clear reduction (Z = -2.39, p = 0.017) in the incidence of clinical cases, suggesting that treatment of APCs is useful for controlling falciparum malaria. For vivax malaria, 120 APCs were identified among the 716 residents living in five villages. Comparing the monthly incidence of vivax malaria in two villages where the APCs were treated with the incidence in two villages where APCs were not treated yielded contradictory results and no clear differences in the incidence were observed (Z = -0.09, p = 0.933). Interestingly, a follow-up study showed that the frequency of clinical relapse in both the treated and untreated APCs was similar to the frequency seen in patients treated for primary clinical infections, thus indicating that vivax clinical immunity in the population is not species specific but only strain specific. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Memórias do Instituto Oswaldo Cruz 107 5 621 629 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
malaria asymptomatic parasite carriers Amazon Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 |
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malaria asymptomatic parasite carriers Amazon Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 Mauro Shugiro Tada Ricardo de Godoi Mattos Ferreira Tony Hiroshi Katsuragawa Rosimeire Cristina Dalla Martha Joana D’Arc Neves Costa Letusa Albrecht Gerhard Wunderlich Luiz Hildebrando Pereira da Silva Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
topic_facet |
malaria asymptomatic parasite carriers Amazon Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 |
description |
In this study, we determined whether the treatment of asymptomatic parasites carriers (APCs), which are frequently found in the riverside localities of the Brazilian Amazon that are highly endemic for malaria, would decrease the local malaria incidence by decreasing the overall pool of parasites available to infect mosquitoes. In one village, the treatment of the 19 Plasmodium falciparum-infected APCs identified among the 270 residents led to a clear reduction (Z = -2.39, p = 0.017) in the incidence of clinical cases, suggesting that treatment of APCs is useful for controlling falciparum malaria. For vivax malaria, 120 APCs were identified among the 716 residents living in five villages. Comparing the monthly incidence of vivax malaria in two villages where the APCs were treated with the incidence in two villages where APCs were not treated yielded contradictory results and no clear differences in the incidence were observed (Z = -0.09, p = 0.933). Interestingly, a follow-up study showed that the frequency of clinical relapse in both the treated and untreated APCs was similar to the frequency seen in patients treated for primary clinical infections, thus indicating that vivax clinical immunity in the population is not species specific but only strain specific. |
format |
Article in Journal/Newspaper |
author |
Mauro Shugiro Tada Ricardo de Godoi Mattos Ferreira Tony Hiroshi Katsuragawa Rosimeire Cristina Dalla Martha Joana D’Arc Neves Costa Letusa Albrecht Gerhard Wunderlich Luiz Hildebrando Pereira da Silva |
author_facet |
Mauro Shugiro Tada Ricardo de Godoi Mattos Ferreira Tony Hiroshi Katsuragawa Rosimeire Cristina Dalla Martha Joana D’Arc Neves Costa Letusa Albrecht Gerhard Wunderlich Luiz Hildebrando Pereira da Silva |
author_sort |
Mauro Shugiro Tada |
title |
Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
title_short |
Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
title_full |
Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
title_fullStr |
Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
title_full_unstemmed |
Asymptomatic infection with Plasmodium falciparum and Plasmodium vivax in the Brazilian Amazon Basin: to treat or not to treat? |
title_sort |
asymptomatic infection with plasmodium falciparum and plasmodium vivax in the brazilian amazon basin: to treat or not to treat? |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
publishDate |
2012 |
url |
https://doi.org/10.1590/S0074-02762012000500008 https://doaj.org/article/a2efcf6957ce4e9bba94940adc9920df |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Memórias do Instituto Oswaldo Cruz., Vol 107, Iss 5, Pp 621-629 (2012) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762012000500008&lng=en&tlng=en https://doaj.org/toc/1678-8060 1678-8060 doi:10.1590/S0074-02762012000500008 https://doaj.org/article/a2efcf6957ce4e9bba94940adc9920df |
op_doi |
https://doi.org/10.1590/S0074-02762012000500008 |
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Memórias do Instituto Oswaldo Cruz |
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107 |
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621 |
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629 |
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