Relapsing Fever

Cause, Symptoms, & Treatment

Oct 4, 2023 - 21:22
 0  14

relapsing fever, infectious disease characterized by recurring episodes of fever separated by periods of relative well-being and caused by spirochetes, or spiral-shaped bacteria, of the genus Borrelia. The spirochetes are transmitted from one person to another by lice (genus Pediculus) and from animals to humans by soft-bodied ticks of the genus Ornithodoros or by the hard-bodied tick Ixodes scapularis. Epidemics of the disease have occurred during wars, earthquakes, famines, and floods.

Tick-borne relapsing fever occurs in Africa, the Americas, Asia, and Europe and frequently is contracted by persons visiting wooded campsites or cabins that have been infested with rodents. The louse-borne disease is endemic to northeast Africa, and cases rarely occur outside the region. Louse-borne relapsing fever spreads under conditions of crowding, cold weather, and poor hygiene, all of which favour the spread of the lice that transmit the infectious organism from person to person.

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