Rickettsia Felis Case Cluster in a Military Family.

Area of Science:

• Infectious Diseases
• Public Health
• Veterinary Entomology

Background:

• Flea-borne spotted fever (FBSF) cases are rising in the southern US, particularly Texas.
• Historically, murine typhus (Rickettsia typhi) was dominant, but Rickettsia felis transmitted by cat fleas may now be more prevalent.
• FBSF poses risks to military personnel's health and operational effectiveness.

Purpose of the Study:

• To describe the management of a complex pediatric case initially diagnosed as murine typhus.
• To detail a case cluster of FBSF (R. felis) in a military family.
• To highlight challenges in diagnosing and managing re-emerging FBSF.

Main Methods:

• Clinical case management and description.
• Quantitative polymerase chain reaction (qPCR) testing of flea samples.
• Review of diagnostic and public health challenges.

Main Results:

• A child with complex conditions was initially misdiagnosed with murine typhus.
• A military family experienced an FBSF (R. felis) case cluster.
• qPCR confirmed R. felis in associated flea samples.
• Challenges identified include diagnostic difficulty, resource limitations, R. felis vertical transmission, and need for inter-agency coordination.

Conclusions:

• Accurate diagnosis of FBSF is challenging but crucial.
• Effective control necessitates collaboration between healthcare providers, public health, and pest management.
• R. felis poses a significant and growing public health concern in the US.