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Measurement of malarial infectivity of human populations to mosquitoes in the Madang area, Papua New Guinea

Published online by Cambridge University Press:  06 April 2009

P. M. Graves ,
T. R. Burkot ,
R. Carter ,
J. A. Cattani ,
M. Lagog ,
J. Parker ,
B. J. Brabin ,
F. D. Gibson ,
D. J. Bradley  and
M. P. Alpers
P. M. Graves
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
T. R. Burkot
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
R. Carter
Affiliation:
Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md 20792, USA
J. A. Cattani
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
M. Lagog
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
J. Parker
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
B. J. Brabin
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
F. D. Gibson
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
D. J. Bradley
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel St, LondonWC1E 7HT, England
M. P. Alpers
Affiliation:
Papua New Guinea Institute of Medical Research, P.O. Box 378, Madang, Papua New Guinea
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Summary

The proportion of blood meals taken on humans which are infectious to mosquitoes in the Madang area, Papua New Guinea was estimated by two methods. In the first, laboratory reared Anopheles farauti were fed on individuals of all ages at village surveys. The results showed that 3·8% of people were infectious and that the mean percentage of mosquitoes which became infected by feeding on these people was 37·9%. From the average proportion of mosquitoes infected, the probability that a mosquito feeding on a human would pick up infection was 0·013±0·005. In the second approach mosquitoes were fed on identified Plasmodium falciparum, P. vivax and P. malariae gametocyte carriers. The results indicated that 46% of gametocyte carriers were infectious and that the mean probability of a mosquito becoming infected after feeding on a gametocyte carrier was 0·151±0·029. Gametocyte prevalence rates in all ages measured over 18 months in three villages averaged 3·3% P. falciparum, 4·0% P. vivax and 0·7% P. malariae, totalling 8·0±0·7%. Combining gametocyte prevalence rates with the probability of a mosquito becoming infected from a gametocyte carrier, the probability of a mosquito becoming infected following a blood meal on a member of the human population was estimated to be 0·012±0·003.

Type
Research Article
Information
Parasitology , Volume 96 , Issue 2 , April 1988 , pp. 251 - 263
Copyright
Copyright © Cambridge University Press 1988

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References

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