Distribution and Incidence

Endemic foci of tick-borne relapsing fever exist in most parts of the world, but not in Australia, New

Zealand, and the Pacific islands. Louse-borne relapsing fever has been reported worldwide, but since 1964, Ethiopia is the only country that has continuously reported large numbers of cases. Foci of the disease appear, however, to be present in other African countries, and no information on its prevalence is available for the Soviet Union or China.

As with tyhpus fever, there is a marked seasonal incidence coinciding with the winter months. Warm winter clothes (and in the past, deficient winter hygiene) favor the growth of louse populations, whereas rising heat and humidity in spring and summer cause lice to die.

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Your Heart and Nutrition

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