Rickettsia africae infections in sub-Saharan Africa: A systematic literature review of epidemiological studies and summary of case reports

Trop Med Int Health. 2024 Jul;29(7):541-583. doi: 10.1111/tmi.14002. Epub 2024 May 30.

Abstract

Rickettsia africae is a tick-borne bacteria known to cause African tick bite fever (ATBF). While the disease was first described more than 100 years ago, knowledge of transmission risk factors and disease burden remain poorly described. To better understand the burden of R. africae, this article reviewed and summarized the published literature related to ATBF epidemiology and clinical management. Using a systematic approach, consistent with the PRISMA guidelines, we identified more than 100 eligible articles, including 65 epidemiological studies and 41 case reports. Most reports described R. africae in ticks and livestock, while human studies were less common. Human disease case reports were exclusively among returning travellers from non-endemic areas, which limits our disease knowledge among at-risk populations: people living in endemic regions. Substantial efforts to elucidate the ATBF risk factors and clinical manifestations among local populations are needed to develop effective preventative strategies and facilitate appropriate and timely diagnosis.

Keywords: African tick bite fever; Rickettsia; one health; surveillance; ticks; tick‐borne disease.

Publication types

  • Review

MeSH terms

  • Africa South of the Sahara / epidemiology
  • Animals
  • Humans
  • Rickettsia Infections* / epidemiology
  • Rickettsia Infections* / microbiology
  • Rickettsia* / isolation & purification
  • Risk Factors
  • Tick-Borne Diseases / epidemiology
  • Tick-Borne Diseases / microbiology
  • Ticks / microbiology

Supplementary concepts

  • Rickettsia africae