title: Effects of seawater on growth and gliotoxin excretion of marine strains of Aspergillus fumigatus Fres.
abstract: In order to enhance the knowledge of the putative toxinic risk linked to mycotoxin excretion in shellfish farming areas, the influence of seawater salinity was studied on 2 marine-derived Aspergillus fumigatus strains. This fungal species produces gliotoxin, an epipolythiodioxopiperazine immunosuppressive mycotoxin that can be accumulated in the meat of cultured blue mussel (Mytilus edulis), and could be responsible for disease when ingested. Two marine strains were grown in vitro both on a non-saline and a saline culture media and were compared with 13 terrestrial strains to observe the effects of seawater on fungal growth and gliotoxin excretion in the exudate produced. Daily measurement of the colony areas showed that the seawater salinity significantly reduced the rate of growth of all the strains. Marine and terrestrial strains appeared to be almost similar as regards the appearance, growth and gliotoxin excretion, but the marine strains exudation seemed to be less influenced by seawater salinity than the terrestrial strains. Seawater salinity, however, enhanced exudation and gliotoxin excretion by A. fumigatus, and thus seems to be an aggravating factor for the toxicity of this species in the marine environment.
authors: Université de Nantes, Nantes Atlantique Universités, Pôle Mer et Littoral, SMAB, EA2160, Faculté de Pharmacie, 1 rue G. Veil, BP 53508, Nantes F-44000, France.
authors: Isabelle
authors: I
authors: Kerzaon
authors: Olivier
authors: O
authors: Grovel
authors: Thibaut
authors: T
authors: Robiou Du Pont
authors: Patrice
authors: P
authors: Le Pape
authors: Yves-François
authors: YF
authors: Pouchus
mesh_terms: D001232:Aspergillus fumigatus / Q000187:drug effects / Q000378:metabolism*; D005912:Gliotoxin / Q000737:chemistry / Q000378:metabolism*; D015394:Molecular Structure; D012623:Seawater; D012965:Sodium Chloride / Q000494:pharmacology; D013997:Time Factors
chemical_list: D012965:Sodium Chloride; D005912:Gliotoxin