Health Guide to Malaria: Symptoms, Prevention and Treatment

Table of Contents

Malaria is a life-threatening disease caused by parasites of the genus Plasmodium, which are transmitted to humans through the bites of infected female Anopheles mosquitoes. Despite significant advancements in medical research and public health measures, malaria remains a major global health challenge, particularly in tropical and subtropical regions.

The disease presents a wide spectrum of symptoms, ranging from mild flu-like manifestations to severe complications that can lead to death.

As you prepare for your upcoming travels, it’s crucial to be aware of the potential health risks you may encounter, particularly if your destination includes tropical or subtropical regions. Malaria, is one such disease that travellers need to understand and take preventive measures against.

Before travelling, check whether malaria is present in your destination. The Centers for Disease Control and Prevention (CDC) and the World Health Organisation (WHO) provide updated information on malaria risks by region.

Visit a travel clinic or your healthcare provider 4-6 weeks before your trip to discuss the risk of malaria and the best preventive measures for you. They can prescribe antimalarial medication based on your destination, medical history, and any potential drug interactions.

Here’s what you need to know about malaria and how to protect yourself during your journey.

Geographic risk areas

Malaria is primarily a concern in tropical and subtropical regions around the world. The geographic risk areas can be broadly categorised into the following regions Sub-Saharan Africa, Asia, Middle East and Central Asia, Latin America and the Caribbean and Oceania.

For further information on specific countries where the disease is present a map of malaria distribution around the world can be viewed here.

Travellers to these regions should consult healthcare providers before travelling to determine the need for antimalarial medication and use preventive measures such as insect repellents, protective clothing, and bed nets.

By understanding the geographic risk areas for malaria, you can take appropriate measures to protect yourself and reduce the risk of infection.

Recognising the symptoms of malaria

The common symptoms typically appear 10-15 days after an infected mosquito bite and can be divided into uncomplicated and severe symptoms.

Common symptoms of uncomplicated malaria

• Fever: Often cyclical, with episodes occurring every 48 to 72 hours.
• Chills and sweats: Cycles of feeling very cold and shivering followed by sweating.
• Headache: Intense and persistent headaches.
• Nausea and vomiting: Common digestive symptoms.
• Muscle aches and pains: General muscle discomfort and pain.
• Fatigue: Profound tiredness and weakness.
• Malaise: A general feeling of being unwell.
• Dry cough: Occasionally, a mild cough can be present.

Severe malaria symptoms

Severe malaria can develop rapidly and requires immediate medical attention. Symptoms include:

• Severe anemia: Due to the destruction of red blood cells, leading to weakness and shortness of breath.
• Respiratory distress: Difficulty breathing or rapid breathing.
• Cerebral malaria: Impaired consciousness, seizures, and coma.
• Organ failure: Severe malaria can cause kidney or liver failure.
• Hypoglycemia: Low blood sugar levels, particularly in pregnant women and children.
• Shock: Low blood pressure and circulatory collapse.
• Hemoglobinuria: Dark urine due to hemolysis, the breakdown of red blood cells.

When to seek medical attention

If you develop any symptoms of malaria during or after travelling to an endemic area, seek medical attention immediately. Prompt diagnosis and treatment are crucial to prevent complications and severe disease.

Being aware of the symptoms and seeking timely medical care can significantly improve outcomes for those affected by malaria.

Prevention of malaria

Preventing malaria involves a combination of strategies aimed at avoiding mosquito bites, using prophylactic medications, and taking measures to reduce mosquito populations.

Here’s a detailed guide on how to prevent malaria.

Avoiding mosquito bites

Insect repellents

• Use DEET-based repellents: Apply insect repellents containing DEET, picaridin, IR3535, or oil of lemon eucalyptus to exposed skin and clothing.
• Reapply as directed: Follow the instructions on the product for reapplication frequency.

Protective clothing

• Long sleeves and pants: Wear long-sleeved shirts and long pants, especially during peak mosquito activity times (dusk and dawn).
• Treated clothing: Consider clothing treated with permethrin for added protection.

Mosquito nets

• Bed nets: Sleep under insecticide-treated bed nets (ITNs) if sleeping areas are not adequately protected.
• Portable nets: Use portable nets for outdoor sleeping.

Indoor protection

• Air conditioning and screens: Stay in accommodations with air conditioning and screens on windows and doors.
• Insecticide vaporisers and coils: Use mosquito coils or vaporisers inside living areas to reduce mosquito presence.

Chemoprophylaxis (Preventive Medications)

Consult a Healthcare Provider

Visit a travel clinic or your healthcare provider well before your trip to get advice on suitable antimalarial medication based on your destination and health profile.

Common antimalarial medications

• Atovaquone-Proguanil (Malarone): Taken daily, starting 1-2 days before travel and continuing for 7 days after leaving the malaria area.
• Doxycycline: Taken daily, starting 1-2 days before travel and continuing for 4 weeks after leaving the area.
• Mefloquine (Lariam): Taken weekly, starting 2 weeks before travel and continuing for 4 weeks after leaving the area.
• Primaquine: Used for specific destinations and strains; effective against dormant liver stages.

Environmental measures

Mosquito control

• Larvicides: Use larvicides in standing water to kill mosquito larvae.
• Environmental management: Remove or manage standing water where mosquitoes breed (e.g., puddles, gutters, containers).

Vaccination

Malaria vaccine

• RTS,S/AS01 (Mosquirix): The first malaria vaccine approved for use in certain endemic regions, primarily in sub-Saharan Africa. Check with your healthcare provider if it’s appropriate for your travel plans.

How to treat malaria

Treating malaria involves prompt and effective medical intervention to eliminate the Plasmodium parasites from the bloodstream and to manage the symptoms. The treatment approach depends on the type of Plasmodium species, the severity of the disease, and the patient’s overall health and medical history.

Treatment of uncomplicated malaria

Artemisinin-based Combination Therapies (ACTs)

• First-line treatment: Combines artemisinin or its derivatives with another antimalarial drug to improve efficacy and reduce resistance.

Chloroquine

• Specific use: Effective against Plasmodium vivax and Plasmodium ovale in regions where these species remain sensitive.
• Resistance issues: Not recommended for Plasmodium falciparum due to widespread resistance.

Other Medications

• Atovaquone-proguanil (Malarone): An alternative treatment, particularly for travellers and in areas with drug-resistant malaria.
• Quinine sulfate with doxycycline or clindamycin: Used in cases of drug resistance or intolerance to ACTs.

Treatment of severe malaria

Intravenous (IV) Artesunate

• WHO recommended: The preferred treatment for severe malaria due to its rapid action and efficacy.
• Administration: Given intravenously for at least 24 hours, followed by a full course of oral ACTs once the patient can tolerate oral medication.

Intravenous (IV) Quinine

• Alternative: Used where IV artesunate is not available.
• Monitoring required: Close monitoring for side effects, such as hypoglycemia and cardiac complications, is necessary.

Supportive care

Management of complications

• Fluids and electrolytes: To manage dehydration and electrolyte imbalances.
• Blood transfusions: For severe anemia.
• Anticonvulsants: For seizures, particularly in cerebral malaria.
• Oxygen therapy: For respiratory distress or severe anemia.

Nutritional Support

• Balanced diet: Ensure adequate nutrition to support recovery.
• Vitamin and mineral supplements: If needed, based on nutritional assessment.

FAQs: About malaria

Conclusion

Effective treatment of malaria requires timely diagnosis and appropriate use of antimalarial medications. Healthcare providers play a critical role in ensuring the correct treatment regimen is followed and in managing any complications that may arise. Adhering to prescribed treatments and follow-up care is essential for complete recovery and to prevent the spread of malaria.

This information is to complement and not replace the relationship with your family doctor. Always discuss your travel health requirements with your regular doctor or practice nurse.