Honest about the risks, and specific about what prevents each one.
Altitude illness
The Government of Canada notes that some Ecuadorian cities and major attractions sit above 2,700 metres, that high-altitude illness ranges from mild to severe, that in extreme cases it can be fatal, and that it may require immediate medical evacuation. Quito is around 2,850 metres and you arrive by plane. CDC’s Ecuador page says nothing about altitude, which is why it is easy to miss.
Prevention A gentle first day in Quito, no alcohol on it, and drink more water than feels necessary. Know the symptoms: headache, nausea, breathlessness at rest, confusion. Descending is the treatment that always works. Altitude medication is prescribable by a pharmacist in Alberta — bring your ascent plan.
Traveller’s diarrhoea
The Government of Canada calls it the most common illness affecting travellers, spread person-to-person or through contaminated food and water, with young children, older travellers and people with existing health problems at higher risk.
Prevention Its own rule of thumb is boil it, cook it, peel it or leave it. Bottled or boiled water including for teeth, ice only where you trust the kitchen, food cooked fresh and hot. Rehydration salts weigh nothing and we can send you with a standby antibiotic where appropriate.
Dengue
The Government of Canada says dengue is a risk to travellers, that the mosquitoes typically bite during the day, and that there is no vaccine or medication available in Canada to prevent it. CDC lists it as a mosquito-borne risk for Ecuador.
Prevention Repellent through the day, not just at dusk. Air-conditioned or screened rooms in the lowlands.
Zika
A risk in Ecuador according to both sources. Spread mainly by mosquito bite but also sexually, and an infected pregnant woman can pass it to her unborn baby, where it can cause serious birth defects.
Prevention If you are pregnant or planning a pregnancy, this deserves a proper conversation before you book rather than after.
Oropouche
The Government of Canada lists Oropouche virus disease for Ecuador, spread by midge and mosquito bites, with no vaccine or medication available, and asks anyone pregnant or planning a pregnancy to speak to a provider about outbreak areas. Midges are small enough to pass through ordinary mosquito netting.
Prevention Fine-mesh screens or air conditioning for jungle lodges rather than netting alone, plus repellent and covered skin at dawn and dusk.
Animals — dogs and bats
CDC notes rabid dogs are sometimes found in Ecuador and that rabies is present in bats. The Government of Canada calls rabies common here. Bats are the part people forget, and caves and lava tubes are on plenty of itineraries.
Prevention Do not touch or feed animals, and never handle a bat, alive or dead. Any bite, scratch or lick on broken skin: wash for a full fifteen minutes and seek medical advice the same day, vaccinated or not.
Fresh water
CDC advises against swimming in fresh water in areas with poor sanitation and names leptospirosis, a bacterial infection spread in fresh water, as present in Ecuador. It also lists melioidosis, linked to contaminated fresh water, mud and soil especially after heavy rain.
Prevention Stay out of lakes, ponds and rivers, and out of floodwater. Cover cuts and grazes properly before wading anywhere.
Crime and roads
The Government of Canada states crime rates are high in Ecuador, with violent crime including armed robbery, express kidnapping and carjacking occurring even during the day in tourist destinations, and warns about drink-spiking with scopolamine in bars and on public transport. On the roads it says accidents causing fatalities are common, rural roads are poorly maintained, and drink-driving is frequent. CDC notes motor vehicle crashes are the number one killer of healthy travellers abroad.
Prevention Official taxis or ride-hailing rather than public buses, no overnight road journeys, and nothing left unattended in a bar. Carry ID — several provinces are under a state of exception with increased police and military checks.
Volcanoes and ash
The Government of Canada lists several monitored active volcanoes, including Cotopaxi, Guagua Pichincha, Reventador, Sangay and Tungurahua, notes eruptions can occur at any time and that ash fall may disrupt flights and close highways, and advises anyone with a respiratory condition to consult a physician before travelling near an active volcano. It also notes wildfires between June and September degrade air quality.
Prevention If you have asthma or COPD, bring more reliever than you think you need and keep it in your day bag. Check current volcano status before booking Cotopaxi National Park — access can be restricted without notice.
Getting treated
The Government of Canada says good health care is limited in availability and quality varies greatly, that public services are below Canadian standards especially in rural areas, and that private care is better but expensive and often requires payment upfront. From the Galápagos, serious conditions need medical evacuation, there is no air ambulance based on the islands, and the wait can be up to 48 hours.
Prevention Travel insurance that explicitly covers medical evacuation and hospital stays, with the policy number saved offline. Bring medication in original labelled containers in your carry-on with a copy of the prescription, and a Spanish copy of your medication list.