Related Experiment Videos
Viruses and rickettsiae
1Department of Neuropathology and Clinical Neurology, Radcliffe Infirmary, Oxford, UK. mmesiri@clneuro.ox.ac.uk
Abstract:
In this review I shall try to provide a brief, up-to-date, account of the neuropathology of those viral and rickettsial diseases that are particularly prevalent in tropical regions. These diseases are not, however, exclusive to the tropics. Some, such as AIDS, are common in temperate regions as well, though others are closer to being exclusively tropical, such as some of the arthropod-borne (ARBO) virus encephalides. The latter are dependent for their dissemination on an existence during part of their infectious cycle in insects which are, in turn, climatically and seasonally sensitive. This necessarily limits their geographical distribution. Factors that influence some of the other diseases are less closely dependent on climate and geography and reflect more the social or cultural conditions under which people live. Thus, diseases that depend for their spread on forms of human behavior such as promiscuity or drug abuse (AIDS), or poor hygiene and living conditions (polio, rickettsial diseases) or on contact with domestic and other animals (rabies) may occur in a more widespread distribution, for the tropics are not the only places that afford opportunities for these diseases to flourish. I shall select for discussion aspects of the pathology of these diseases that are currently undergoing investigation but will aim to present these against the backdrop of more established aspects of their pathology. Recent reviews of the pathology of viral encephalitis can be found in Hamilton and Wiley (33) and Esiri and Kennedy (20) and of HIV-1 infection in Price & Sidtis (78) and Scaravilli (85).
Insights
This review details the neuropathology of tropical viral and rickettsial diseases, including arthropod-borne (ARBO) viruses and HIV-1. It examines factors influencing disease spread, from climate to social conditions, highlighting current research.
Area of Science:
- Neuropathology
- Tropical infectious diseases
- Virology
- Rickettsiology
Background:
- Tropical regions harbor unique viral and rickettsial diseases.
- Some diseases, like certain arthropod-borne (ARBO) virus encephalitides, are geographically restricted due to insect vector dependence.
- Other diseases, including HIV-1 (AIDS), polio, and rabies, have wider distributions influenced by social, behavioral, and environmental factors.
Purpose of the Study:
- To provide a current overview of the neuropathology of prevalent tropical viral and rickettsial diseases.
- To discuss established and emerging pathological aspects of these infections.
- To explore factors influencing disease distribution, including climate, vectors, and human behavior.
Main Methods:
- Review of existing literature on neuropathology of selected tropical diseases.
- Synthesis of information on established and under-investigation pathological aspects.
- Analysis of factors contributing to disease prevalence and spread.
Main Results:
- Neuropathology varies significantly among tropical viral and rickettsial diseases.
- Arthropod-borne (ARBO) virus encephalitides exhibit climate-sensitive geographical limitations.
- Diseases like HIV-1, polio, and rabies show broader distribution linked to social and behavioral factors.
Conclusions:
- Understanding the neuropathology of tropical infectious diseases is crucial for targeted interventions.
- Both environmental and socio-behavioral factors play critical roles in disease epidemiology.
- Continued research into the pathology of these diseases is essential for advancing treatment and prevention strategies.