Date: July 16, 2019

Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this afternoon. Wind southwest 20 km/h gusting to 40. High 29. Humidex 37. UV index 7 or high.


Feels like 36C

Environment Canada
Text Size >   A   A   A

Printer Friendly

Travel Immunization Links


Immunization Clinics

Malaria Prevention

This page was reviewed or revised on Thursday, July 21, 2016 3:07 PM

Environmental Health & Prevention Services

What is Malaria?

  • Malaria is a serious disease caused by several different species of malarial parasites which infect the blood and then other body organs.
  • Symptoms include fever, chills, muscle aches, headaches, and sometimes vomiting and diarrhea. 
  • Severe infection with Falciparum species of malaria may cause liver and kidney failure, convulsions, coma, and death if not treated immediately. 
  • Currently there is no effective vaccine against malaria.

Malaria should be suspected if a traveller has FEVER and/or fatigue, headache, myalgia, abdominal pain within several moths of return from a malaria endemic area. A blood test can help to confirm this diagnosis. Visit a doctor and notify him/her that you have returned from a country where malaria is present.

How is Malaria transmitted?

  • The disease is most commonly transmitted to humans through the bite of an infected mosquito.
  • The Anopheles mosquito spreads malaria and bites from dusk until dawn.
  • In rare circumstances malaria can be spread by transfusion with infected blood, or by shared needle use, or from a mother to her unborn child.

How do I prevent Malaria?

  • Avoid exposure to mosquitoes by wearing clothing that covers the arms and legs from dusk to dawn (when the mosquito bites).
  • Apply a non-aerosol mosquito repellent to exposed skin.
  • Liquid repellents with at least 30 to 35% concentration of DEET, such as DEEP WOODS OFF and MUSKOL are most effective.
  • Use nylon mosquito bed nets (16 X 18 mesh) and sleep in screened lodgings. Some mosquito nets have repellent right in the mesh.

Malaria medication is prescribed by a physician. Your physician prescribes the proper medication based on the destination and duration of travel.

  1. Mefloquine (Lariam): 1 tablet a week before going into the area of risk, and 1 tablet a week while there, and for 4 weeks on return.
  2. Doxycyline (Vibramycin): 1 tablet  daily starting 1 - 2 days prior to going into area of risk, 1 tablet daily while there, and continue daily for 4 weeks after leaving malaria area.
  3. Chloroquine (Aralen): taken once weekly, beginning 1 week before entering area of risk, while in are of risk, and for 4 weeks after leaving the area.
  4. Atovaquone/Proguanil (Malrone): 1 pill per day starting two days before entering malarious area, while in malarious area and for 7 days after leaving.