A bacterial infection transmitted by lice or ticks, causing recurring episodes of fever.
For the 100% active-disease rating, medical records confirming a current, active relapsing fever diagnosis are central. This includes lab results, physician notes, and hospitalization records showing the disease is ongoing. Once the disease resolves, evidence supporting residual disability ratings would depend on which body system is affected. For liver or spleen damage, imaging studies, lab work, and specialist evaluations would be relevant. For iritis or uveitis, ophthalmology records and vision test results matter. For central nervous system involvement, neurological exam findings, imaging, and cognitive or functional assessments would be pertinent. Statements from you or people who know you describing how these residual conditions affect your work and daily life can also support the severity of any residual disability rating.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.