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Susceptibility of food-contaminating Penicillium genus fungi to some preservatives and disinfectants

100%
Levinskaite L.
Annals of Agricultural and Environmental Medicine
|
2012
|
tom 19
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nr 1
Microscopic fungi are able to contaminate and deteriorate various food products and can subsequently cause health problems. Long usage of the same preservatives and disinfectants against spoilage fungi may lead to the development of fungal resistance to those chemicals. The objective of this study was to investigate the susceptibility of 3 Penicillium genus fungi, isolated from foodstuffs, to organic acid preservatives and some disinfectants, taking into consideration 2 aspects of their development: spore germination and mycelial growth. Susceptibility of Penicillium spinulosum, P. expansum and P. verruculosum to the preservatives, namely benzoic acid, sodium lactate, potassium sorbate, as well as disinfectants such as Topax DD, Suma Bac D10, Biowash and F210 Hygisept, was investigated. The biocides were used at concentrations of 0.1, 1.0 and 10%. Of the preservatives, benzoic acid and potassium sorbate showed the best inhibition, both on spore germination and mycelial growth. Benzoic acid at a concentration of a 0.1% reduced spore germination by 33-55%, and mycelial growth by 54-97%, whereas at 1% the inhibition was 74-85% and 97-100%, respectively. The effect of the disinfectants at a concentration of 0.1% on spore germination was 25-84% and on colonial growth 68-97%, while at 1.0% the reduction in spore germination reached 53-91% and the inhibition of growth 89-100%. In most cases, the same concentrations added to the media showed higher inhibitory effect on mycelial growth than on spore germination. It was noticed that the fungi responded rather unevenly towards the biocides, showing individual susceptibility.
2
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Toxin-producing fungi on feed grains and application of yeasts for their detoxification

51%
Repeckiene J., Levinskaite L., Paskevicius A., Raudoniene V.
Polish Journal of Veterinary Sciences
|
2013
|
tom 16
|
nr 2
The research deals with the contamination of feeding crops with fungi, producing mycotoxins and use of selected yeasts for detoxification. The thin-layer chromatography and ELISA methods were applied for the analysis of fungal secondary metabolites. The results showed a high rate of the grain contamination with fungi, mainly from genera Penicillium, Fusarium, Aspergillus and Alternaria. Some of the fungal strains produced 6-9 toxic compounds. The novelty of the study was the application of the yeast strains in detoxification of aflatoxins, zearalenon and deoxynivalenol in feed.
3

Presence of potential toxin producing micromycetes on fruit and berries

51%
Stakeniene J., Lugauskas A., Levinskaite L.
Bulletin of the Polish Academy of Sciences. Biological Sciences
|
2001
|
tom 49
|
nr 4
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