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  • Title: [Risk of disease in 10,500 travelers to tropical countries and 1,300 tourists to North America].
    Author: Steffen R, van der Linde F, Meyer HE.
    Journal: Schweiz Med Wochenschr; 1978 Sep 30; 108(39):1485-95. PubMed ID: 705301.
    Abstract:
    A survey on rate of illness among 10 500 tourists returning from the tropics and a control group of 1300 from the United States and Canada was performed by a questionnaire completed during the flight back to Switzerland. Only 25% from southern destinations, but 53% from North America, were never incapacitated during their travels. The vast majority of the illnesses were of no consequence, as was reflected by a low rate for bed confinement of 4% and 1% respectively. The most frequent symptoms in the tropics were diarrhea in 34% (mostly of short duration and mild degree), constipation in 14%, upper respiratory illness in 12% and insomnia in 11%. There were significant differences according to sex, age and tropical experience. The influence on pre-existing diseases was assessed. 7% of the tourists returning from the tropics were sick in the course of the year following the journey.
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