Related Experiment Video
Updated: May 2, 2026

An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines
Published on: October 11, 2022
Rickettsial meningitis
Inês Salva1, Rita de Sousa, Catarina Gouveia
1Department of Pediatrics, Hospital de Dona Estefânia, Lisbon, Portugal.
Abstract:
Rickettsial infections are common in southern Europe and the most frequent and lethal type is Mediterranean spotted fever, caused by Rickettsia conorii. The disease is usually characterised by the classical triad of fever, eschar and rash, and is generally a mild disease in children. Complications including neurological involvement are rarely described. We report an unusual case of meningitis in an 18-year-old man, presenting during summer with fever and persistent headache. The cerebrospinal fluid analysis revealed increased cellularity (107 cells/μL), hypoglycorrhachia (50% of glycaemia) and hyperproteinorrhachia (284 mg/dL). Rickettsial infection was confirmed by serology and the patient was treated with doxycycline, with a favourable outcome. The patient's pet squirrel and/or associated vectors might be involved in the transmission of Rickettsia spp. This case underlines the importance of a high clinical suspicion and the benefits of early empirical treatment when facing compatible epidemiological contexts.
Insights
Mediterranean spotted fever, a Rickettsia conorii infection, can cause rare neurological complications like meningitis. Early doxycycline treatment is crucial for favorable outcomes in suspected cases.
Area of Science:
- Infectious Diseases
- Neurology
- Public Health
Background:
- Mediterranean spotted fever (MSF), caused by Rickettsia conorii, is prevalent in Southern Europe.
- MSF typically presents with fever, eschar, and rash, usually mild in children.
- Neurological complications of MSF are uncommon.
Observation:
- An 18-year-old male presented with fever and persistent headache during summer.
- Cerebrospinal fluid analysis showed increased cells, low glucose, and high protein.
- Rickettsial infection was confirmed via serology.
Findings:
- The patient was diagnosed with Rickettsia conorii meningitis.
- Treatment with doxycycline resulted in a favorable outcome.
- A pet squirrel and/or vectors may have been involved in transmission.
Implications:
- This case highlights the importance of considering Rickettsial infections in meningitis differentials.
- High clinical suspicion and early empirical doxycycline treatment are vital.
- Understanding transmission routes, including potential zoonotic links, is crucial for prevention.
Related Concept Videos
Bacterial Meningitis I: Introduction
Viral Meningitis
Bacterial Meningitis II: Pathophysiology
Encephalitis l: Introduction
Intracellular Movement of Viruses and Bacteria
Arboviral Encephalitis

