Spotted fever in Hong Kong

Area of Science:

• * Infectious Diseases
• * Pediatrics
• * Medical Entomology

Background:

• * Rickettsial infections, particularly those of the spotted fever group, are significant zoonotic diseases.
• * Understanding the epidemiology and clinical presentation of these infections is crucial for early diagnosis and treatment, especially in regions with limited prior reports.

Observation:

• * A previously healthy 7-year-old child presented with acute onset fever, generalized rash, prostration, conjunctivitis, and arthralgia.
• * The child resided in a rural area of Hong Kong and had contact with domestic animals, including rodents, dogs, and cows.
• * Rapid clinical improvement was observed following treatment with Chloramphenicol.

Findings:

• * Diagnostic tests, including Weil-Felix and specific serology, confirmed a rickettsial infection of the spotted fever group.
• * This case represents the first documented instance of spotted fever in Hong Kong.

Implications:

• * Highlights the potential presence and introduction of spotted fever group rickettsial infections in Hong Kong.
• * Emphasizes the importance of considering rickettsial diseases in febrile illnesses with rash, especially in individuals with relevant animal or environmental exposures.
• * Suggests the need for enhanced surveillance and diagnostic capabilities for tick-borne and zoonotic diseases in the region.