Rabies encephalitis in malaria-endemic area, Malawi, Africa

Area of Science:

• Neurology
• Infectious Diseases
• Public Health

Background:

• Rabies is a fatal zoonotic viral disease affecting the central nervous system.
• Malaria is a significant public health concern in many African regions.
• Accurate diagnosis of central nervous system infections is crucial for effective treatment and public health strategies.

Purpose of the Study:

• To determine the prevalence of rabies as a cause of fatal central nervous system infections in a malaria-endemic area of Africa.
• To investigate the diagnostic challenges and potential misclassification of rabies cases, particularly in relation to cerebral malaria.

Main Methods:

• Retrospective analysis of fatal central nervous system infection cases.
• Review of clinical records and postmortem diagnoses.
• Comparison of rabies diagnoses with initial clinical diagnoses, including cerebral malaria.

Main Results:

• Rabies accounted for 10.5% (14 out of 133) of all fatal central nervous system infections.
• Four cases presented with atypical clinical signs, leading to delayed diagnosis until postmortem examination.
• Rabies was identified as the cause in 11.5% (3 out of 26) of cases initially diagnosed as cerebral malaria.

Conclusions:

• Rabies is a significant and often under-recognized cause of fatal encephalitis in this malaria-endemic region.
• Clinical presentation of rabies can be variable, mimicking other neurological conditions like cerebral malaria.
• Improved diagnostic awareness and methods are needed to prevent misdiagnosis and ensure timely intervention for rabies.