Related Experiment Videos
Neurological melioidosis: seven cases from the Northern Territory of Australia
M L Woods1, B J Currie, D M Howard
1Department of Medicine, University of Utah School of Medicine, Salt Lake City.
Abstract:
Pseudomonas pseudomallei, which causes melioidosis, is most commonly associated with pulmonary infection. We describe seven patients who developed a neurological syndrome as the predominant manifestation of melioidosis: this syndrome was characterized by peripheral motor weakness (mimicking Guillain-Barré syndrome), brain-stem encephalitis, aseptic meningitis, and respiratory failure. Neurological melioidosis occurred in the absence of demonstrable foci of infection in the central nervous system (CNS) in five of six patients whose cerebrospinal fluid was available for culture. Computed tomography and magnetic resonance imaging of the brain and spinal cord of these patients were not suggestive of pyogenic infection, although the latter procedure detected brain-stem encephalitis. Autopsy findings in one case confirmed brain-stem encephalitis without evidence of direct bacterial infection. The clinical presentation of neurological melioidosis includes features of an exotoxin-induced neurological syndrome, with profound neurological disease occurring in the absence of apparent direct infection of the CNS. This syndrome appears to be a newly recognized clinical presentation of melioidosis.
Insights
Melioidosis, caused by Pseudomonas pseudomallei, can present as a severe neurological syndrome. This condition mimics Guillain-Barré syndrome and causes respiratory failure, often without direct central nervous system infection.
Area of Science:
- Neurology
- Infectious Diseases
- Microbiology
Background:
- Melioidosis, caused by Pseudomonas pseudomallei, is typically a pulmonary infection.
- Neurological involvement in melioidosis is rare and often secondary to other foci of infection.
- The clinical spectrum of melioidosis requires ongoing investigation.
Observation:
- Seven patients presented with neurological melioidosis as the primary manifestation.
- Clinical features included peripheral motor weakness, brain-stem encephalitis, aseptic meningitis, and respiratory failure.
- Central nervous system infection was not evident in most cases, despite severe neurological symptoms.
Findings:
- Neurological melioidosis can present without detectable central nervous system infection.
- Brain-stem encephalitis was observed, even without direct bacterial seeding.
- The syndrome may be mediated by an exotoxin, leading to profound neurological disease.
Implications:
- This study identifies a distinct clinical presentation of melioidosis: neurological melioidosis.
- Early recognition is crucial for timely diagnosis and treatment of this potentially fatal condition.
- Further research into the pathogenesis and diagnosis of neurological melioidosis is warranted.