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Infection with tickborne parasite may suppress malaria

Date:
March 24, 2010
Source:
American Society for Microbiology
Summary:
A new study suggests that monkeys chronically infected with babesiosis, a tick-borne parasite, are able to suppress malaria infection when exposed to a simian malaria parasite.

A new study suggests that monkeys chronically infected with babesiosis, a tick-borne parasite, are able to suppress malaria infection when exposed to a simian malaria parasite.

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The researchers from the Biomedical Primate Research Center, Rijswijk, The Netherlands report their findings in the March 2010 issue of the journal Infection and Immunity.

Babesia parasites are known to infect a wide variety of mammalian hosts and awareness of the role these organisms play as zoonotic agents of human disease is growing. Of the population infected with Babesia microti, 25% of adults and 50% of children remain asymptomatic. Human malaria is caused by four different Plasmodium species, however, Plasmodium falciparum and Plasmodium vivax are the most significant with P. falciparum attributed to more than 1 million deaths annually in sub-Saharan Africa.

Prior studies of Babesia and Plasmodium coinfection in rodents have reported induced cross-protection. In an attempt to confirm their prior report that a rhesus macaque chronically infected with B. microti was able to suppress infection with Plasmodium cynomolgi (a parasite of macaques with attributes similar to P. vivax), researchers infected six naive monkeys with B. microti and then 24 days later challenged four of them plus four naďve monkeys with P. cynomolgi blood-stage parasites. Results showed a significant decrease in P. cynomolgi infection in monkeys coinfected with B. microti.

"We conclude that ongoing infection with B. microti parasites leads to suppression of malaria infection," say the researchers.


Story Source:

The above story is based on materials provided by American Society for Microbiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. L. M. van Duivenvoorde, A. Voorberg-van der Wel, N. M. van der Werff, G. Braskamp, E. J. Remarque, I. Kondova, C. H. M. Kocken, A. W. Thomas. Suppression of Plasmodium cynomolgi in Rhesus Macaques by Coinfection with Babesia microti. Infection and Immunity, 2010; 78 (3): 1032 DOI: 10.1128/IAI.00921-09

Cite This Page:

American Society for Microbiology. "Infection with tickborne parasite may suppress malaria." ScienceDaily. ScienceDaily, 24 March 2010. <www.sciencedaily.com/releases/2010/03/100323224028.htm>.
American Society for Microbiology. (2010, March 24). Infection with tickborne parasite may suppress malaria. ScienceDaily. Retrieved October 26, 2014 from www.sciencedaily.com/releases/2010/03/100323224028.htm
American Society for Microbiology. "Infection with tickborne parasite may suppress malaria." ScienceDaily. www.sciencedaily.com/releases/2010/03/100323224028.htm (accessed October 26, 2014).

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