Prevalence of Malaria reported during Summer and Winter at a Tertiary Care Hospital in Karachi, Pakistan

Fazal Manzoor Arain, Ayesha Majeed Memon, Roohi Jamal, Ahmed Raheem, Mohammad Asim Beg

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This study was designed to determine the prevalence and type of malaria cases that presented throughout the year 2014 in a tertiary care hospital in Karachi, Pakistan. A total of 1099 cases, (377 females, 722 males) were reported. Plasmodium vivax (P. vivax) was discovered in 93.7% cases compared to 6.3% Plasmodium falciparum (P. falciparum). Based on the highest and lowest weather temperatures, in summer (June, July and August) and in winter (December, January and February) were differentiated. The number of cases were greater during summer months compared to winter. Interestingly, the ratio of P. falciparum to P. vivax during winter was greater compared to summer. Finally, there was a strong correlation between increasing humidity and number of malaria cases. These findings show that even though the incidence of malaria is higher in summer, malaria cases are still reported in winter. Furthermore, the probability of finding P. falciparum (which causes cerebral malaria ) is higher in winter.

Original languageEnglish
Pages (from-to)1721-1724
Number of pages4
JournalJPMA. The Journal of the Pakistan Medical Association
Issue number11
Publication statusPublished - 1 Nov 2019


  • Malaria, Plasmodium Vivax, Plasmodium Falciparum, weather, humidity.


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