A marked seasonality of malaria transmsission in two rural sites in eastern Sudan

Amel A. Hamad, Abd El Hamid D Nugud, David E. Arnot, Haider A. Giha, Abdel Muhsin A Abdel-Muhsin, Gwiria M H Satti, Thor G. Theander, Alison M. Creasey, Hamza A. Babiker, Dia Eldin A Elnaiem

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The ecology of Anopheles arabiensis and its relationship to malaria transmission was investigated in two villages in eastern Sudan. Seasonal malaria case incidence was compared with the number of vectors detected and with climatic variables. Following the end of the short rainy season in October the number of A. arabiensis detected dropped gradually until February when neither outdoor human bait trapping nor indoor spray catches revealed any mosquitoes. Vectors re-appeared in June as humidity rose with the onset of rain. Despite the apparent absence of the vector at the height of the long, hot dry season between February and May, sporadic asymptomatic malaria infections were detected in the two villages. The low endemicity of malaria in the area was reflected by the relatively low total September-December parasite and sporozoite rates (15 and 1.4%, respectively) measured in the villages. The entomological inoculation rate (EIR) was estimated to be around two to three infective bites per person per year, although heterogeneity in the transmission indices of malaria between the two villages was observed. The implications of these patterns of anopheline population dynamics for the epidemiology and control of malaria in eastern Sudan are considered.

Original languageEnglish
Pages (from-to)71-82
Number of pages12
JournalActa Tropica
Volume83
Issue number1
DOIs
Publication statusPublished - 2002

Fingerprint

Sudan
malaria
Malaria
villages
Anopheles arabiensis
Sporozoites
Asymptomatic Infections
Anopheles
Population Control
Rain
sporozoites
Population Dynamics
warm season
Bites and Stings
Humidity
Ecology
Culicidae
baits
trapping
epidemiology

Keywords

  • Anopheles arabiensis
  • Dry season
  • Entomologic inoculation rate
  • Plasmodium falciparum
  • Sporozoite rate
  • Unstable malaria

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

Cite this

Hamad, A. A., Nugud, A. E. H. D., Arnot, D. E., Giha, H. A., Abdel-Muhsin, A. M. A., Satti, G. M. H., ... Elnaiem, D. E. A. (2002). A marked seasonality of malaria transmsission in two rural sites in eastern Sudan. Acta Tropica, 83(1), 71-82. https://doi.org/10.1016/S0001-706X(02)00059-1

A marked seasonality of malaria transmsission in two rural sites in eastern Sudan. / Hamad, Amel A.; Nugud, Abd El Hamid D; Arnot, David E.; Giha, Haider A.; Abdel-Muhsin, Abdel Muhsin A; Satti, Gwiria M H; Theander, Thor G.; Creasey, Alison M.; Babiker, Hamza A.; Elnaiem, Dia Eldin A.

In: Acta Tropica, Vol. 83, No. 1, 2002, p. 71-82.

Research output: Contribution to journalArticle

Hamad, AA, Nugud, AEHD, Arnot, DE, Giha, HA, Abdel-Muhsin, AMA, Satti, GMH, Theander, TG, Creasey, AM, Babiker, HA & Elnaiem, DEA 2002, 'A marked seasonality of malaria transmsission in two rural sites in eastern Sudan', Acta Tropica, vol. 83, no. 1, pp. 71-82. https://doi.org/10.1016/S0001-706X(02)00059-1
Hamad AA, Nugud AEHD, Arnot DE, Giha HA, Abdel-Muhsin AMA, Satti GMH et al. A marked seasonality of malaria transmsission in two rural sites in eastern Sudan. Acta Tropica. 2002;83(1):71-82. https://doi.org/10.1016/S0001-706X(02)00059-1
Hamad, Amel A. ; Nugud, Abd El Hamid D ; Arnot, David E. ; Giha, Haider A. ; Abdel-Muhsin, Abdel Muhsin A ; Satti, Gwiria M H ; Theander, Thor G. ; Creasey, Alison M. ; Babiker, Hamza A. ; Elnaiem, Dia Eldin A. / A marked seasonality of malaria transmsission in two rural sites in eastern Sudan. In: Acta Tropica. 2002 ; Vol. 83, No. 1. pp. 71-82.
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