How Plasmodium vivax May Help Fight Plasmodium falciparum
Author Information
Author(s): Nagao Yoshiro, Kimura-Sato Masako, Chavalitshewinkoon-Petmitr Porntip, Thongrungkiat Supatra, Wilairatana Polrat, Ishida Takafumi, Tan-ariya Peerapan, de Souza J Brian, Krudsood Srivicha, Looareesuwan Sornchai
Primary Institution: Faculty of Tropical Medicine, Mahidol University
Hypothesis
Immunological responses stimulated by P. vivax may play a role in suppressing co-infecting P. falciparum.
Conclusion
The study suggests that cross-reactive antibodies, especially IgM, may help suppress P. falciparum growth during P. vivax infection.
Supporting Evidence
- Sera collected during acute P. vivax infection showed up to 68% inhibition of P. falciparum growth.
- Cross-reactive IgM antibodies correlated with the inhibition of P. falciparum.
- IL-12 levels were highest during P. vivax parasitaemia and correlated with fever.
Takeaway
When someone gets sick with one type of malaria, it might help them fight off another type of malaria because of special antibodies in their blood.
Methodology
Sera from a volunteer infected with P. vivax were tested for their inhibitory effects on P. falciparum growth in vitro.
Potential Biases
Self-recruitment of the researcher may introduce bias.
Limitations
The findings are based on a single volunteer, which limits generalizability.
Participant Demographics
One male volunteer aged 35 and 21 healthy adult control subjects (9 male, 12 female, median age 33).
Statistical Information
P-Value
<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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