Transmission intensity and malaria vector population structure in Magugu, Babati District in northern Tanzania

  • Charles E. Mwanziva Kilimanjaro Clinical Research Institute
  • Jovin Kitau Kilimanjaro Clinical Research Institute
  • Patrick K. Tungu Amani Medical Research Centre, Muheza, Tanzania
  • Clement N. Mweya Tukuyu Medical Research Centre, Tukuyu, Tanzania
  • Humphrey Mkali Kilimanjaro Clinical Research Institute Box 2236 Moshi Kilimanjaro Tanzania
  • Chacha M. Ndege Mwanza Medical Research Centre, Mwanza B0x 1462 Mwanza
  • Alex Sanga St John University Box 47 Dodoma
  • Charles Mtabho KCRI, Box 2236 Moshi
  • Charles Lukwaro KCRI box 2236 Moshi
  • Joseph Myamba Amani Medical Research Centre, P.O. Box 81 Muheza, Tanzania
  • Salum Abdulalazizi Ifakara Health Institute Box 53 Ifakara
  • Stephen M. Magesa Amani Medical Research Centre, Muheza, Tanzania
  • Jaffu Chilongola KCRI Box 2236 Moshi
  • Seif Shekalaghe KCM College Box 2240 Moshi
  • Franklin W. Mosha KCRI Box 2236 Moshi
Keywords: Anopheles arabiensis, malaria, transmission, vector abundance, Tanzania

Abstract

A 1-year longitudinal study was conducted in Magugu in Babati district, northern Tanzania to determine malaria vector population structure and malaria transmission indices. Mosquitoes were sampled using the Centre for Disease Control (CDC) light traps. A total of 110,357 adult female mosquitoes were collected. Anopheles gambiae s.l. accounted 25% of the total female mosquito collected. Relatively fewer An. funestus were collected. Other mosquito species collected were An. pharoensis, An. coustani, An. maculipalpis, An. marshallii, Culex quinquefasciatus, Cx unnivittatus, Mansonia uniformis and Ma. africana. An analysis by Polymerase Chain Reaction revealed that An. arabiensis was the only member of the An. gambiae complex in the collected samples. The number of mosquito collected correlated with the increasing mean rainfall. Blood meal analysis showed a higher human enzymatic reaction among An. gambiae s.l. (63.5%) followed by An. funestus (42.9%). Bovine enzymatic reaction was higher among An. coustani (73.7%) followed by the An. pharoensis (66.7%). The Enzyme Linked Immunosorbent Assay (ELISA) was used to detect Plasmodium falciparum circumsporozoites proteins in 10,000 female Anopheles mosquitoes. Only two An. arabiensis were found to be infected. The entomological inoculation rate (EIR) was estimated at 0.51 infectious bites per person per year. This EIR was considered to be relatively low, indicating that malaria transmission in this area is low. Variability in mosquito blood meal shows availability of variety of preferred blood meal choices and impact of other factors inhibiting mosquito–human host contact. The study has provided information considered useful in the mapping of the vector distribution and population structure in the country. Such information is considered to be among the essential tools for planning malaria control interventions.

Author Biographies

Charles E. Mwanziva, Kilimanjaro Clinical Research Institute
Research Scientist, PhD candidate
Jovin Kitau, Kilimanjaro Clinical Research Institute
Research Scientist, PhD candidate
Patrick K. Tungu, Amani Medical Research Centre, Muheza, Tanzania
Research Scientist, PhD candidate
Clement N. Mweya, Tukuyu Medical Research Centre, Tukuyu, Tanzania
Entomologist
Humphrey Mkali, Kilimanjaro Clinical Research Institute Box 2236 Moshi Kilimanjaro Tanzania
Statistician
Chacha M. Ndege, Mwanza Medical Research Centre, Mwanza B0x 1462 Mwanza
Entomologist
Alex Sanga, St John University Box 47 Dodoma
Social Scientist, Research Scientist
Charles Mtabho, KCRI, Box 2236 Moshi
Research Scientist, PhD candidate
Charles Lukwaro, KCRI box 2236 Moshi
Field entomology assistant
Joseph Myamba, Amani Medical Research Centre, P.O. Box 81 Muheza, Tanzania
Entomologist
Salum Abdulalazizi, Ifakara Health Institute Box 53 Ifakara
Laboratory Technologist, Scientist
Stephen M. Magesa, Amani Medical Research Centre, Muheza, Tanzania
Director, Senior research Scientist, Entomologist
Jaffu Chilongola, KCRI Box 2236 Moshi
Deputy Director, Senior Research Scientist, Immunologist
Seif Shekalaghe, KCM College Box 2240 Moshi
Research Scientist, Epidemiologist
Franklin W. Mosha, KCRI Box 2236 Moshi

Director, Senior Research Scientist, Entomologist

Published
2011-04-22
How to Cite
MwanzivaC. E., KitauJ., TunguP. K., MweyaC. N., MkaliH., NdegeC. M., SangaA., MtabhoC., LukwaroC., MyambaJ., AbdulalaziziS., MagesaS. M., ChilongolaJ., ShekalagheS., & MoshaF. W. (2011). Transmission intensity and malaria vector population structure in Magugu, Babati District in northern Tanzania. Tanzania Journal of Health Research, 13(1), 54-61. https://doi.org/10.4314/thrb.v13i1.57252
Section
Articles

Journal Identifiers


eISSN: 1821-9241
print ISSN: 1821-6404