Pathogenic fungi: an unacknowledged risk at coastal resorts? New insights on microbiological sand quality in Portugal

Whilst the potential impact on beach users from microorganisms in water has received considerable attention, there has been relatively little investigation into microbial contaminants in sand. Thirty three beaches across Portugal were analyzed during a five year period (2006–2010) to determine the presence of yeasts, pathogenic fungi, dermatophytes, total coliforms, Escherichia coli and intestinal enterococci in sand. Our results showed that 60.4% of the samples were positive for fungi and that 25.2% were positive for the bacterial parameters. The most frequent fungal species found were Candida sp. and Aspergillus sp., whereas intestinal enterococci were the most frequently isolated bacteria. Positive associations were detected among analyzed parameters and country-regions but none among those parameters and sampling period. Regarding threshold values, we propose 15 cfu/g for yeasts, 17 cfu/g for potential pathogenic fungi, 8 cfu/g for dermatophytes, 25 cfu/g for E. coli, and 10 cfu/g for intestinal enterococci.

Palavras-chave

Sand quality Beach Fungi Bacteria Bioindicators Microbiological thresholds Agentes microbianos e Ambiente Infecções Sistémicas e Zoonoses

URI

http://hdl.handle.net/10400.18/228

Citação

Mar Pollut Bull. 2011 Jul;62(7):1506-11. Epub 2011 May 6

Editora

Elsevier

Coleções

DDI - Artigos em revistas internacionais
DEP - Artigos em revistas internacionais
DSA - Artigos em revistas internacionais

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