Effects of El Nino events on...

In the News

Project builds case for dedicated health impact assessments

A visiting scientist from an IHI implementing partner in Switzerland, Dr. Fritz Brugger, presents at the event in Dar es Salaam. PHOTO/IHI (Dar es Salaam) IHI and partners hosted a …

IHI recruits Motor Vehicle Mechanic

IHI is looking for a Motor Vehicle Mechanic to fill a vacant position in our workshop. S/he must be specialized in servicing and repairing all systems contained within automotive vehicles. …

Recent Projects

Development of a new tool for malaria mosquito surveillance to improve vector control

Malaria transmission is influenced not only by vector abundance, but as well by demographic traits such as vector species and age structure, as these influence the intensity by which the …

Demonstrating complete disruption of residual malaria transmission by eliminating Anopheles funestus mosquitoes from rural Tanzanian villages

In rural south-eastern Tanzania, where malaria prevalence has reduced by >60% since 2000, low-to-moderate transmission still persists despite very high coverage with long-lasting insecticidal bednets. Like in most residual transmission …

Effects of global climate on mosquito numbers and malaria cases in the Kilombero Valley in Tanzania

El Nino weather events have been shown to impact significantly on many mosquito-borne diseases (VBDs), including malaria, dengue,Rift Valley fever and others. While the link between El Nino and disease is well established, the mechanism underlying it isnot fully understood. Here we aim to take advantage of the collection over the past 9 years of detailed entomological data on malaria mosquitoes to detect any changes to seasonal changes of mosquito numbers and species found caused by the current El Nino event.

namwawala-bs-009We aim to understand how El Niño events impact on VBDs. We focus on malaria, which remains the VBD with the greatest impact on human mortality and morbidity. Malariais caused by parasitic protozoa of the genus Plasmodium and it is transmitted by female Anopheles mosquitoes.

The spatial limits of malaria distribution, its seasonal activity and the mosquito vector dynamics are very sensitive to climate factors, as well as the local capacity to control the disease.This study explores the connections between the current El Niño event, its impact on regional and local climate, and the subsequent consequences on malaria vectors and malaria burden in Tanzania.

The study is carried out to better understand how El Nino affects malaria, and in order to build an early warning system prototype for malaria risk in Tanzania.

The overall aim of this project is to detect a perturbation to the dynamics of a disease vector triggered by the current ElNino, relate it to underlying weather conditions, and assess its impact on levels of clinical disease. Demonstrating that the link between El Nino and VBD lies in the dynamics of the vector itself, and is triggered by weather, will enable control measures (against the vector) to be implemented earlier, or other mitigation measures to be undertaken.

Lead Scientists:

Nicodem Govella

Katharine Kreppel


Ifakara Health Institute (IHI)
University of Liverpool, Institute of Infection and Global Health (Professor Matthew Baylis.)
University of Glasgow


Department for International Development (DFID)
National Environmental Research Council (NERC), UK

Projects Location

© Ifakara Health Institute (IHI), 2016