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Published on: June 13, 2011
Infectious myelopathies
1Department of Neurology, University of Kentucky College of Medicine, Lexington 40536, USA.
Abstract:
Although infectious myelopathies are rare, timely and accurate diagnosis is essential to improving outcome. There are a number of organisms that may cause infectious myelopathies, including human immunodeficiency virus (HIV), human T-cell lymphotropic virus type I (HTLV-I), herpesviruses, enteroviruses, Treponema pallidum, Mycobacterium tuberculosis, fungi, and parasites. Vacuolar myelopathy, the most common form of spinal cord disease in HIV-infected individuals, is underrecognized clinically. The failure to diagnose this condition is generally a consequence of the attribution of the lower extremity weakness and paresthesias to general debility and concomitant peripheral neuropathy. Tropical spastic paraparesis or HTLV-I-associated myelopathy involves the pyramidal tracts, chiefly at the thoracic level, and results in spastic lower extremity weakness and a spastic bladder. The herpesviruses (varicella-zoster, herpes simplex type 2, cytomegalovirus) and the enteroviruses cause myelitis. Prior to the development of antibiotics, syphilis was the most frequent infectious cause of spinal cord disease. In light of the broad spectrum of pathogens that may affect the spinal cord and the variegate fashion in which these disorders may present, the physician must always consider an infectious etiology in the differential diagnosis for the patient presenting with myelopathy. This review addresses the infectious myelopathies by microorganism.
Insights
Infectious myelopathies, though rare, require prompt diagnosis for better outcomes. This review details various microorganisms causing spinal cord infections, emphasizing timely identification for effective treatment.
Area of Science:
- Neurology
- Infectious Diseases
- Spinal Cord Medicine
Background:
- Infectious myelopathies are uncommon but necessitate rapid diagnosis for improved patient outcomes.
- A diverse range of pathogens, including viruses (HIV, HTLV-I, herpesviruses, enteroviruses), bacteria (Treponema pallidum, Mycobacterium tuberculosis), fungi, and parasites, can cause spinal cord infections.
- Vacuolar myelopathy in HIV-infected individuals and HTLV-I-associated myelopathy (tropical spastic paraparesis) are significant clinical entities.
Purpose of the Study:
- To review infectious myelopathies based on the causative microorganisms.
- To highlight the importance of considering infectious etiologies in the differential diagnosis of myelopathy.
- To provide an overview of the clinical presentations associated with various infectious agents affecting the spinal cord.
Main Methods:
- Literature review of infectious myelopathies.
- Categorization of spinal cord infections by causative organism.
- Discussion of clinical manifestations and diagnostic considerations.
Main Results:
- Identified numerous pathogens responsible for infectious myelopathies, including HIV, HTLV-I, herpesviruses, enteroviruses, T. pallidum, M. tuberculosis, fungi, and parasites.
- Highlighted vacuolar myelopathy as a common, often underrecognized, spinal cord disease in HIV.
- Described HTLV-I-associated myelopathy's impact on pyramidal tracts and its characteristic symptoms.
Conclusions:
- A broad spectrum of microorganisms can lead to myelopathy, presenting with varied clinical signs.
- Physicians must maintain a high index of suspicion for infectious causes when evaluating patients with myelopathy.
- Accurate and timely diagnosis of infectious myelopathies is crucial for effective management and improved neurological outcomes.
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