Genotypic diversity of environmental Cryptococcus neoformans isolates from Northern Portugal. Issue 2 (15th July 2013)

• Record Type: Journal Article
• Authors: Ferreira, Ana Sofia; Sampaio, Ana; Maduro, Ana Paula; Silva, Inês; Teles, Fernando; Martins, Maria da Luz; Inácio, João
• Is Part Of: Mycoses. Volume 57:Issue 2(2014)
• Page Start: 98
• Page End: 104
• Publication Date: 2013-07-15
• Subjects: Pathogenic fungi -- Periodicals; Medical mycology -- Periodicals; 616.969
• DOI: 10.1111/myc.12106
• Languages: English
• ISSNs: 0933-7407

Abstract

<abstract abstract-type="main" id="myc12106-abs-0001"> <title>Summary</title> <p>The <italic>Cryptococcus neoformans</italic>/<italic>C. gattii</italic> species complex members are the main agents of systemic cryptococcosis. This disease is believed to be acquired from the environment via fungal cell inhalation. Often, isolates recovered from environmental and clinical sources have proven to be genotypically similar. We assessed the occurrence of <italic>C. neoformans</italic> and <italic>C. gattii</italic> in environmental substrates collected in a Portuguese region. Twenty‐eight isolates were identified as <italic>C. neoformans</italic> – five from decaying <italic>Eucalyptus</italic> leaves and 23 from domestic pigeon droppings. The isolates were genotyped using a <italic>URA5</italic>‐RFLP approach. The <italic>C. neoformans</italic> VNIV (53.6%, <italic>n</italic> = 15) and VNI (32.1%, <italic>n</italic> = 9) genotypes were abundantly present among environmental isolates. The hybrid VNIII (14.3%, <italic>n</italic> = 4) genotype was underrepresented and the VNII was not found. <italic>Cryptococcus gattii</italic> was also not found although some isolates yielded a positive canavanine–glycine–bromothymol blue test.</p> </abstract>