Symptoms
The disease is classically a five-day fever of the relapsing type, rarely with a continuous course instead. The incubation period is relatively long, at about two weeks. The onset of symptoms is usually sudden with high fever, severe headache, pain on moving the eyeballs, soreness of the muscles of the legs and back, and frequently hyperaesthesia of the shins. The initial fever is usually followed in a few days by a single, short rise but there may be many relapses between periods without fever. The most constant symptom is pain in the legs. Recovery takes a month or more. Lethal cases are rare, but in a few cases "the persistent fever might lead to heart failure". Aftereffects may include neurasthenia, cardiac disturbances and myalgia.
Read more about this topic: Trench Fever
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