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Possibility of in-hospital infection by Cryptococcus neoformans in patients with AIDS
M E Rustan1, H R Rubinstein, C Siciliano
1Dpto. Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina.
Abstract:
The objective of the present work was to carry out a survey of soil samples taken from different areas of a hospital of infectious disease located in the city of Córdoba, where three AIDS patients were hospitalized during different periods in the same ward. The three of them returned with meningeal cryptococcosis between three or five months after having been discharged. Cryptococcus neoformans was isolated in 8/10 samples collected outside the hospital, near the pigeon house. The samples collected from the AIDS patients ward and its surroundings were negative. These findings suggest that the patients may have been infected by the fungus during their first stay in hospital.
Insights
Soil samples near a pigeon house at an infectious disease hospital tested positive for Cryptococcus neoformans. This suggests a potential environmental source for meningeal cryptococcosis infections in immunocompromised patients.
Area of Science:
- Medical Mycology
- Infectious Disease Epidemiology
- Environmental Health
Background:
- Cryptococcosis is a serious fungal infection, particularly in individuals with compromised immune systems, such as those with Acquired Immunodeficiency Syndrome (AIDS).
- Hospital environments can harbor opportunistic pathogens, posing risks to vulnerable patient populations.
- Recurrent infections in discharged patients necessitate investigation into potential sources of exposure.
Observation:
- Soil samples were collected from various locations within an infectious disease hospital in Córdoba.
- Three patients diagnosed with AIDS were hospitalized for meningeal cryptococcosis and subsequently discharged.
- These patients experienced a recurrence of meningeal cryptococcosis 3-5 months post-discharge.
Findings:
- Cryptococcus neoformans was successfully isolated from 8 out of 10 soil samples obtained outside the hospital, specifically near a pigeon dwelling.
- Soil samples collected within the hospital's AIDS patient ward and its immediate vicinity yielded negative results for Cryptococcus neoformans.
- The environmental survey identified a potential reservoir for the fungus in proximity to the hospital.
Implications:
- The findings indicate a probable link between environmental exposure to Cryptococcus neoformans near the hospital and the patients' initial or recurrent infections.
- This highlights the importance of environmental surveillance for fungal pathogens in healthcare settings, especially those serving immunocompromised individuals.
- Further research is warranted to elucidate transmission routes and implement targeted preventative strategies to mitigate cryptococcosis risk in hospital settings.