Gonçalves, A. B.

Lima, Nelson

Universidade do Minho: RepositoriUM

 Accueil Société Française de Microbiologie          Bun  VPalaiSoctel. 01 45 6  1s iét8 8ORpont Ie C0, 1des Cé Française de1 79 - 01 45 6DEAUX entre les disciplines      ongrès National 1, 12 mai 2004 ongrès Bordeaux-Lac Microbiologie - 28 rue du Dr Roux, 75724 Paris cedex 15 8 87 93, fax 01 45 67 46 98, mel : cmurphy@pasteur.fr, site web : http://www.sfm.asso.fr86/284 > programme FUNGI FROM DRINKING WATER DISTRIBUTION NETWORKS.  Ana Bela Gonçalves and Nelson Lima  Micoteca da Universidade do Minho, Centro de Engenharia Biológica, Campus de Gualtar, 4710-057 Braga, Portugal.  Microbial pathogens in drinking water have increasingly become important during the last decades. However, little is known about the pathogenic potential of different fungal species in potable water supply systems. Fungi are involved in the production of tastes and odours in water and there are potential health problems from mycotoxins. An EU project is ongoing in Micoteca da Universidade do Minho in order to control the mycological quality of tap water. The methods for the determination of filamentous fungi in Braga tap water were filtering, swabbing and baiting. The specific agars tap water, half strength corn meal, neopeptone glucose rose bengal tetracycline and oomycete selective for the enumeration of CFU were used. Overall, 17 filtering, five swabing (direct plating and pour plating), and three baiting samples were taken during eight months. Penicillium was the most frequent genus following by Rhizopus and Cladosporium. The black yeasts group (Exophiala included) was also found. To date, 112 filamentous fungi have been isolated which are distributed as follows:  Taxa % Penicillium sp. 47.3 Rhizopus sp. 8.9 Cladosporium sp. 6.3 Alternaria sp.  0.9 Chaetomium sp. 0.9 Phialophora sp.  0.9 Black yeasts 10.7 Mycelia sterilia 8.0 Not identifed 16.1  The penicillia may become important as fungal indicator in water distribution network biofilms. The neopeptone glucose rose bengal tetracycline agar provides the best fungal recovery results when compared to the other media. This work has been undertaken as part of a research project which is supported by the European Union within the Fifth Framework Programme, "Energy, Environment and sustainable development programme", n° EVK1-2002-00108. Disclaimer stating that the authors are solely responsible for the work, it does not represent the opinion of the Community and the Community is not responsible for any use that might be made of data appearing therein. 

Fungi from drinking water distribution networks

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Universidade do Minho: RepositoriUM