Context: Despite a wide overlap between endemic areas for two important vector-borne infections, malaria and dengue, published reports of co-infections are scarce till date.
Aims: To find the incidence of dengue and malaria co-infection as well as to ascertain the severity of such dengue and malaria co-infection based on clinical and haematological parameters.
Setting And Design: Observational, retrospective cross-sectional study was designed including patients who consulted the tertiary care hospital of Ahmedabad seeking treatment for fever compatible with malaria and/or dengue.
Subjects And Methods: A total of 8364 serum samples from clinically suspected cases of fever compatible with malaria and/or dengue were collected. All samples were tested for dengue NS-1 antigen before 5 days of onset of illness and for dengue IgM after 5 days of onset of illness. In all samples, malaria diagnosis was based on the identification of Plasmodium parasites on a thin and thick blood films microscopy.
Results: Only 10.27% (859) patients with fever were tested positive for dengue and 5.1% (434) were tested positive for malaria. 3.14% (27) dengue cases show concurrent infection with malarial parasites. Hepatomegaly and jaundice 37.03% (10), haemorrhagic manifestations 18.51% (5) and kidney failure 3.7% (1), haemoglobin <12 g/dl 100% (27) and thrombocytopenia (platelet count <150,000/cmm) 96.29% (26) were common in malaria and dengue co-infections and were much more common in Plasmodium falciparum infections.
Conclusion: All febrile patients must be tested for malaria and dengue, both otherwise one of them will be missed in case of concurrent infections which could lead to severe diseases with complications.
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