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[Cryptococcus neoformans var. neoformans isolated from soil]
C C Machado1, A A Amaral, L C Severo
1Instituto de Pesquisas Biologicas, SSMA, RS.
Abstract:
We inquiry, in the epidemiologic history of 42 patients with cryptococcosis, the contact with pigeon, trying to find the possible source of infection. Of these patients, the information compatible with ecologic niche of Cryptococcus neoformans was positive in 16. Fifty nine samples were recovered from soil, associated with pigeon habitat. We found C. neoformans in four occasions, one in the capital and three in the interior of state. C. neoformans, serotype A, recovered from a central spine fluid coincides with the serotype of the fungus recovered downtown Porto Alegre, in a place suggested by the patient as possible source of infection, characterizing of a case of Cryptococcus neoformans. var. neoformans.
Insights
Pigeon contact was investigated as a source of cryptococcosis in 42 patients. Cryptococcus neoformans was identified in soil samples from pigeon habitats, linking pigeons to potential cryptococcosis transmission.
Area of Science:
- Medical Mycology
- Epidemiology
- Environmental Microbiology
Background:
- Cryptococcosis is a serious fungal infection.
- Identifying the source of Cryptococcus neoformans infection is crucial for prevention.
- Pigeon habitats are known ecological niches for C. neoformans.
Purpose of the Study:
- To investigate the association between pigeon contact and cryptococcosis in patients.
- To identify potential environmental sources of Cryptococcus neoformans in pigeon habitats.
Main Methods:
- Epidemiological inquiry of 42 cryptococcosis patients regarding pigeon contact.
- Collection and microbiological analysis of 59 soil samples from pigeon habitats.
- Serotyping of Cryptococcus neoformans isolates.
Main Results:
- Sixteen patients had information compatible with C. neoformans ecological niche.
- C. neoformans was detected in four soil samples from pigeon habitats.
- A C. neoformans isolate from a patient's cerebrospinal fluid matched the serotype of an isolate found in a patient-identified location.
Conclusions:
- Pigeon habitats represent a potential source for Cryptococcus neoformans infections.
- Environmental sampling can help pinpoint infection sources.
- This study supports the role of pigeons in cryptococcosis epidemiology.