Malaria and the climate in Karachi: An eight year review

  • Fivzia Herekar
  • Sundus Iftikhar
  • Ahsana Nazish
  • Sabeen Rehman
Keywords: Anopheles, Malaria, Seasonality


Background and Objective: Malaria is an arthropod-borne infectious disease transmitted by the mosquito Anopheles and claims millions of lives globally every year. Reasons for failure to eradicate this disease are multifactorial. The seasonality of the malaria is principally determined by climatic factors conducive for breeding of the vector. We aimed to study the relationship between climatic variability and the seasonality of malaria over an eight-year duration.

Methods: This was a retrospective medical chart review of 8,844 confirmed cases of malaria which presented to The Indus Hospital, Karachi from January 2008 to November 2015. Cases were plotted against meteorological data for Karachi to elicit monthly variation.

Results: A secular incline and seasonality in malaria cases over the duration of 8 years was seen. More cases were reported in the summer, rainy season compared with the other three seasons in each year. There was significant association with specific climate variables such as temperature, moisture, and humidity.

Conclusion: There is a marked seasonal variation of malaria in Karachi, influenced by various environmental factors. Identification of the ‘the concentrated period’ of malaria can be helpful for policymakers to deploy malaria control interventions.


How to cite this:
Herekar F, Iftikhar S, Nazish A, Rehman S. Malaria and the climate in Karachi: An eight year review. Pak J Med Sci. Special Supplement ICON 2020. 2020;36(1):S33-S37. doi:

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

How to Cite
Herekar, F., Iftikhar, S., Nazish, A., & Rehman, S. (2019). Malaria and the climate in Karachi: An eight year review. Pakistan Journal of Medical Sciences, 36(1).
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