Malaria: Causes, Symptoms, Diagnosis and Prevention
What is Malaria?
Malaria is a serious infectious disease caused by parasites of the genus Plasmodium. The disease is transmitted to humans through the bites of infected female Anopheles mosquitoes. Malaria remains a major global health problem, especially in tropical and subtropical regions such as Africa and Southeast Asia.
Causes of Malaria
Malaria infection is caused by five main species of the Plasmodium parasite:
- Plasmodium falciparum – the most dangerous type.
- Plasmodium vivax
- Plasmodium ovale
- Plasmodium malariae
- Plasmodium knowlesi
Transmission
Malaria is mainly transmitted through the bite of infected Anopheles mosquitoes. When the mosquito bites a human, the parasite enters the bloodstream and travels to the liver where it multiplies before infecting red blood cells.
Symptoms of Malaria
Symptoms usually appear 10–15 days after infection.
- High fever
- Chills
- Sweating
- Headache
- Nausea and vomiting
- Muscle pain
- Fatigue
Severe malaria may cause serious complications such as:
- Cerebral malaria
- Severe anemia
- Kidney failure
- Respiratory distress
Diagnosis
Malaria is diagnosed through laboratory tests that detect malaria parasites in the blood.
- Microscopic blood smear examination
- Rapid Diagnostic Tests (RDTs)
- PCR tests in specialized laboratories
Treatment
Treatment depends on the parasite species and severity of infection.
- Artemisinin-based Combination Therapy (ACT)
- Chloroquine
- Quinine
- Mefloquine
Prevention
- Use insecticide-treated mosquito nets
- Apply mosquito repellents
- Wear long-sleeved clothing at night
- Eliminate standing water where mosquitoes breed
- Take preventive antimalarial medication when traveling to high-risk areas
Conclusion
Malaria remains a major health concern worldwide. However, early diagnosis, effective treatment, and preventive measures can significantly reduce malaria-related deaths and improve public health.