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Relapses of Plasmodium vivax Infection Usually Result from Activation of Heterologous Hypnozoites

Open access
Imwong, Mallika, Snounou, Georges, Pukrittayakamee, Sasithon, Tanomsing, Naowarat, Kim, Jung Ryong, Nandy, Amitab, Guthmann, Jean‐Paul, Nosten, Francois, Carlton, Jane, Looareesuwan, Sornchai, Nair, Shalini, Sudimack, Daniel, Day, Nicholas P. J., Anderson, Timothy J. C., White, Nicholas J.·2007·The Journal of Infectious Diseases

Abstract

BACKGROUND: Relapses originating from hypnozoites are characteristic of Plasmodium vivax infections. Thus, reappearance of parasitemia after treatment can result from relapse, recrudescence, or reinfection. It has been assumed that parasites causing relapse would be a subset of the parasites that caused the primary infection. METHODS: Paired samples were collected before initiation of antimalarial treatment and at recurrence of parasitemia from 149 patients with vivax malaria in Thailand (n=36), where reinfection could be excluded, and during field studies in Myanmar (n=75) and India (n=38). RESULTS: Combined genetic data from 2 genotyping approaches showed that novel P. vivax populations were present in the majority of patients with recurrent infection (107 [72%] of 149 patients overall [78% of patients in Thailand, 75% of patients in Myanmar {Burma}, and 63% of patients in India]). In 61% of the Thai and Burmese patients and in 55% of the Indian patients, the recurrent infections contained none of the parasite genotypes that caused the acute infection. CONCLUSIONS: The P. vivax populations emerging from hypnozoites commonly differ from the populations that caused the acute episode. Activation of heterologous hypnozoite populations is the most common cause of first relapse in patients with vivax malaria.

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Metadata

Authors
Imwong, M., Snounou, G., Pukrittayakamee, S., Tanomsing, N., Kim, J. R., Nandy, A., Guthmann, J., Nosten, F., Carlton, J., Looareesuwan, S., Nair, S., Sudimack, D., Day, N. P. J., Anderson, T. J. C., & White, N. J.
Venue
The Journal of Infectious Diseases
Published
2007-04
Volume
195
Issue
7
Pages
927-933
ISSN
  • 0022-1899 (ISSN-L)
  • 1537-6613
OpenAlex
W2124740902
Cited by
294
References
20
FWCI
16.65
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Relapses of Plasmodium vivax Infection Usually Result from Activation of Heterologous Hypnozoites. https://app.cochat.ai/papers/10.1086/512241
The paper
Imwong, M., Snounou, G., Pukrittayakamee, S., Tanomsing, N., Kim, J. R., Nandy, A., Guthmann, J., Nosten, F., Carlton, J., Looareesuwan, S., Nair, S., Sudimack, D., Day, N. P. J., Anderson, T. J. C., & White, N. J. (2007). Relapses of Plasmodium vivax Infection Usually Result from Activation of Heterologous Hypnozoites. The Journal of Infectious Diseases. https://doi.org/10.1086/512241

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.