Food and Water
Eat only well-cooked food or fresh fruits and vegetables you have peeled yourself. Do not eat unpasteurized dairy products. Refrain from eating food sold by street vendors; eat only in restaurants that seem clean and well-kept.
Ecuador’s tap water is not drinkable. Drink only bottled or boiled water, and avoid ice in drinks. Make sure that fresh juices are prepared with bottled water as well. In your hotel, use the bottled water provided for brushing your teeth.
Prevent travel-related illnesses
Your best bet is to check the U.S. CDC traveler’s health information page for Ecuador, at http://wwwn.cdc.gov/travel/destinationEcuador.aspx, and follow the advice there, which will depend on where you are traveling in Ecuador. It is possible to contract Hepatitis A from unwashed fresh fruits and vegetables throughout the country, so this vaccine (which is not routinely administered in the U.S. or many European countries) is recommended before your arrival. Diseases such as yellow fever and malaria are for the most part only present in the Amazon region.
When traveling in the Amazon, along the coast, or in other wet and warmer regions, wear plenty of bug repellent with a high DDT factor to avoid being bitten by mosquitoes that may carry diseases.
Wear plenty of sun block with a high SPF and reapply throughout the day to avoid sunburn.
When visiting the Andes at altitudes over 8000 feet (2400 meters), prevent altitude sickness by slowly increasing altitude over several days, staying well hydrated and well rested. If you have signs of headache, dizziness, loss of appetite, nausea, insomnia or otherwise feel ill, please tell your guide immediately.