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Effect of Formaldehyde on Fungi from Broiler Houses
Author(s) -
Dennis C.,
Gaunt H.
Publication year - 1974
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1974.tb00484.x
Subject(s) - broiler , formaldehyde , conidium , aspergillus flavus , microorganism , chemistry , biology , food science , horticulture , bacteria , organic chemistry , genetics
S ummary . A comparison was made of the relative sensitivity to formaldehyde of the predominant fungi isolated from broiler house litter by treating conidia with aqueous solutions of formaldehyde for 45 min at 20–22°. Aspergillus sydowi and A. versicolor were most tolerant of formaldehyde, followed by A. repens, A. flavus , and A. candidus . Least tolerant were Scopulariopsis brevicaulis, A. ruber, A. chevalieri , and Penicillium crustosum . The viability of conidia of selected strains differing in tolerance to formaldehyde and the viability of fungi and bacteria in dust samples collected from commercial broiler houses were tested after exposure to gaseous formaldehyde at 2 p/m (approximate theoretical concentration attained in broiler houses) and 10 p/m (theoretical) (estimated concentration 5 p/m) for 24 h at 20–22° and 65% relative humidity. The viability of the asexual conidia was always < 0.01% whereas with the dust samples only 10 p/m of formaldehyde markedly reduced the viability of all of the microorganisms.