Fulltext

Spatial and Temporal Variation in Abundance of Anopheles (Diptera: Culicidae) in a Malaria Endemic Area in Papua New Guinea

Hii, J.L.K. ; Smith, T. ; Mai, A. ; Mellor, S. ; Lewis, D. ; Alexander, N. ; Alpers, M. P.

In: Journal of Medical Entomology, 1997, vol. 34, no. 2, p. 193-205

Ajouter à la liste personnelle
    Titre
    • Spatial and Temporal Variation in Abundance of Anopheles (Diptera: Culicidae) in a Malaria Endemic Area in Papua New Guinea
    Auteur
    • Hii, J.L.K.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Smith, T.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Mai, A.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Mellor, S.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Lewis, D.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Alexander, N.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    • Alpers, M. P.. Papua New Guinea Institute of Medical Research, P.O. Box 378 Madang, Papua New Guinea
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Medical Entomology, 1997, vol. 34, no. 2, p. 193-205. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:302156
    Summary
    Abundance of anophelines in 10 villages in the Wosera area of Papua New Guinea was monitored during 1990-1993. Of 85,197 anophelines collected in 1,276 paired indoor and outdoor landing catches, 40.4% were Anopheles koliensis Owen, 36.7% An. punctulatus Donitz, 14.3% Art. karwari (James), 4.9% An. farauti s.l. Laveran, 3.1% An. longirostris Brug, and 0.7% An. bancroftii Giles. Maps of average indoor biting rates were produced using a Bayesian conditional autoregressive model which allowed for heterogeneities in sampling effort over time and space. Differences in spatial distributions among species were observed among and within villages and were related to the distribution of larval habitats and vegetation. Abundance of An. punctulatus and An. koliensis decreased with distance from the main waterway and probably from a sago swamp forest at 6 villages in North Wosera. Abundance of An. punctulatus was associated negatively with those of An. farauti s.l., An. longirostris, and An. bancroftii. The latter 3 species also had relatively low ratios of indoor-to-outdoor biting rates, and earlier biting times than An. punctulatus. Human blood indices of at least 0.79 were observed for all species except An. bancroftii. Abundance of all 6 species was correlated temporally with recent rainfall, but An. koliensis, An. kanvari, and An. longirostris showed greater temporal variability than the other species. An. punctulatus and An. koliensis tended to occur together in time and space (index of association, I = 0.85). Weaker associations were seen between An. farauti s.l. and An. longirostris (I = 0.44) and An. koliensis and An. kanvari (I = 0.34). The most frequently collected species occurred together and were concentrated near the Amugu river; the remaining species tended to occur together but in different parts of the Wosera area. The importance of understanding ecological requirements of the different Anopheles vectors and their association with key household and landscape features are discussed in relation to malaria transmission and control