Journal of Community Health

, Volume 11, Issue 2, pp 92–97 | Cite as

Malaria parasitemia in healthy Africans in North Mara, Tanzania

  • Pascal James Imperato
Articles

Abstract

Peripheral blood smears were examined for asymptomatic malaria parasitemia among 406 objectively healthy subjects in North Mara, Tanzania. A total of 33(8.1%) of subjects were found to have asymptomatic malaria parasitemia. Prevalence rates for parasitemia were highest among the youngest age groups and lowest in those 35 years of age and older. Of the 33 positive smears, 21 (63.6%) containedPlasmodium falciparum, 9(27.2%)plasmodium malariae and 3(9.2%) mixed infections of the two. General population surveys for asymptomatic malaria parasitemia in North Mara have shown much higher prevalence rates than those found in the present study. The lower prevalence rates in this study are accounted for by the fact that the population sample consisted of subjects determined to be healthy by objective criteria and lacking hepatomegaly and splenomegaly. The absence of splenomegaly and hepatomegaly in this group suggests that they represent a portion of the population who have already developed significant immunity levels to malarial infections.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Stephens, JWW, Christophers, SR: Malaria Infection in native children.Report of the Malaria Commission of the Royal Society Series 3, 1900.Google Scholar
  2. 2.
    Koch, R.: Zusammenfassende durstellung der ergbrisse der Malaria expedition.Dtsch Med Wschr 26:781–801, 1900.Google Scholar
  3. 3.
    Christophers, SR: The Mechanism of immunity against malaria in communities living under hyper-endemic conditions.Ind J Med Res 12:273–294, 1924.Google Scholar
  4. 4.
    Wilson, DB: Rural hyperendemic malaria in Tanzanyika Territory.Trans Roy Soc Trop Med Hyg 29:583–618, 1936.Google Scholar
  5. 5.
    Garnham, SC: Malaria immunity in Africans, effects in infancy and childhood.Am Trop Med Parasit 43:47–61, 1949.Google Scholar
  6. 6.
    Barber, MA, Olinger, MT, Putnam, P: Studies in malaria in southern Nigeria.An Trop Med 25:461–508, 1931.Google Scholar
  7. 7.
    Thomson, JG: Immunity in Malaria.Trans Roy Soc Trop Med Hyg 26:483–514, 1933.Google Scholar
  8. 8.
    Clyde, DF:Malaria in Tanzania. New York: Oxford University Press, 1967, Pp. 114–115.Google Scholar
  9. 9.
    Bruce-Chwatt, LJ:Essential Malariology. London: William Heinemann Medical Books Ltd., 1980, Pp. 280–293.Google Scholar
  10. 10.
    MacCormack, CP, Lwihula, G: Failure to participate in a malaria chemosuppression programme. North Mara, Tanzania.J Trop Med Hyg 86:99–107, 1983.Google Scholar

Copyright information

© Human Sciences Press 1986

Authors and Affiliations

  • Pascal James Imperato
    • 1
  1. 1.Department of Preventive Medicine and Community HealthState University of New York, Downstate Medical CenterBrooklyn

Personalised recommendations