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Cryptococcal pneumonia in African miners at autopsy
1Respiratory Unit, Chris Hani Baragwanath Hospital, Johannesburg, South Africa.
Summary
Cryptococcal pneumonia occurred in 7% of autopsied South African miners. This fungal infection often co-occurred with other lung infections and was rarely diagnosed clinically in patients with human immunodeficiency virus (HIV).
Area of Science:
- Pulmonary Medicine
- Infectious Diseases
- Occupational Health
Background:
- South African miners have a high prevalence of human immunodeficiency virus (HIV) infection.
- Occupational lung diseases are common in this demographic.
- Autopsies are performed for compensation claims related to these diseases.
Purpose of the Study:
- To determine the prevalence of cryptococcal pneumonia in autopsied miners.
- To investigate co-infections associated with cryptococcal pneumonia.
- To assess the accuracy of clinical diagnoses of cryptococcal pneumonia and meningitis.
Main Methods:
- A case series of 589 black miners with histological evidence of cryptococcal pneumonia at autopsy.
- Autopsy data from 1996-2000 from South African miners.
- Histological examination with staining for cryptococcal organisms.
Main Results:
- The incidence of cryptococcal pneumonia was 7% (589 cases) among 8421 autopsies.
- 16.5% of cases had concomitant respiratory infections, notably Pneumocystis jirovecii pneumonia and mycobacterial infections.
- Cryptococcal meningitis was diagnosed clinically in 46.9%, but cryptococcal pneumonia was diagnosed in only 2.7% of cases.
Conclusions:
- Cryptococcal pneumonia is a significant finding in autopsied miners, particularly those with HIV/AIDS.
- Co-pathology with other infections like tuberculosis and Pneumocystis pneumonia is common.
- Clinical diagnosis of cryptococcal pneumonia is often missed, highlighting the need for increased awareness in at-risk populations.
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