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Scale-up of integrated malaria vector control: lessons from Malawi
Emmanuel Chanda1, Themba Mzilahowa2, John Chipwanya3
1Malaria Vector Control Consultant, 11 Granite Street, Off Kamwala South Road, Plot 33421/917, PO Box 30146, Kamwala South, 10101 Lusaka, Zambia .
Bulletin of the World Health Organization
|June 9, 2016
Summary
Malawi scaled up long-lasting insecticidal nets (LLINs) and indoor residual spraying (IRS) for malaria control. Despite increased coverage, insecticide resistance and funding challenges impacted effectiveness, leading to fluctuating malaria cases.
Area of Science:
- Public Health
- Vector-Borne Disease Control
- Entomology
Background:
- Malaria remains a significant public health challenge in Malawi, necessitating robust vector control strategies.
- Indoor residual spraying (IRS) and long-lasting insecticidal nets (LLINs) are primary interventions, but Malawi faced challenges in scaling up IRS and ensuring adequate LLIN coverage and usage.
Purpose of the Study:
- To evaluate the implementation and impact of LLIN distribution and IRS in Malawi between 2002 and 2012.
- To identify challenges and lessons learned for effective malaria vector control.
Main Methods:
- The study involved large-scale distribution of LLINs and IRS, with programmatic data collected on coverage and implementation.
- Monitoring of insecticide resistance in malaria vectors was conducted, influencing intervention strategies.
Main Results:
- Between 2002 and 2012, over 18 million LLINs were distributed, increasing household coverage from 27% to 58%.
- IRS coverage expanded significantly, but insecticide resistance led to a shift in chemicals and a reduction in operational scope.
- Malaria cases initially increased, then decreased, reflecting the complex interplay of interventions and resistance.
Conclusions:
- Integrated vector management, combining multiple control methods, may yield better results than single-intervention approaches.
- Developing and implementing a resistance management plan is crucial for the long-term success of vector control programs.
- Sustained technical and financial support is essential for effective malaria control.
