Arrangements should be made beforehand on how to contact their physician by telephone and locate a local physician. Brittle diabetics with frequent episodes of ketoacidosis and pregnant women should be careful to keep their travel short and simple if at all possible. Adjustment in insulin dosage when crossing more than six international time zones is not easily reduced to formulas and will need to be individualized depending on time of departure, stopovers, susceptability to jet lag, itinerary after arrival, etc. Contaminated undercooked foods may also cause parasitic infections with long incubation periods. To help prevent these conditions, the traveler should be encouraged to thoroughly cleanse and cook all meats and vegetables.
Peeled fruits are generally safe.
Travelers should inspect and avoid eating in establishments if the restroom is poorly maintained and lacks housekeeping. 4,5,6 Water Supplies Water supplies in Europe and industrialized countries is generally considered safe by U.S. standards. However, water supplies including ice cubes and water used to brush teeth in remote areas or developing and third world countries should be avoided. If not available, drinking water should be boiled for five minutes prior to consumption. Chlorine and iodine tablets may also be used to purify water and are usually available at outdoor equipment or sporting goods stores.