Interaction of Wild Strains of Aspergilla with Aspergillus parasiticus ATCC15517 on Aflatoxins Production

Abstract

Aflatoxins are secondary metabolites produced by some competent mould strains of Aspergillus flavus, A. parasiticus and A. nomius. These compounds have been extensively studied with regards to their toxicity for animals and humans; they are able to induce liver cancer and may cause a wide range of adverse effects in living organisms. Aflatoxins are found as natural contaminants of food and feed; the main line of the strategy to control them is based on the prevention of the mould growth in raw vegetable or during its storage and monitoring of each crop batch. Mould growth is conditioned by many ecological factors, including biotic ones. Hazard characterization models for aflatoxins in crops must take into consideration biotic interactions between moulds and their potential effects on growth development. The aim of this work is to study the effect of the biotic interaction of 14 different wild strains of Aspergilla (different species), with a competent strain (Aspergillus parasiticus ATCC 15517) using an in vitro production model. The laboratory model used was a natural matrix (humidified cracked corn), on which each wild strain challenged the aflatoxin production of a producer strain. Cultures were incubated at † It has been brought to our attention that due to a production error an earlier unedited version of this paper was uploaded as http://www.mdpi.org/ijms/papers/i9030394-old.pdf. It has now been replaced with the correct version. The Editorial Office wishes to apologize to our readership for this error.

Molecular characterization of aflatoxigenic and non-aflatoxigenic Aspergillus flavus isolates collected from corn grains

“…Three isolates produced G1 in concentrations ranging from 2 to 4 ppb, and two isolates produced G2 in concentrations ranging from 1 to 3 ppb. Martins et al (2008) detected and quantified AF using HPLC in Portugal. Five isolates of A. flavus produced B1, B2, G1 and G2.…”

Aflatoxin accumulation in whole crop maize silage as a result of aerobic exposure

“…AFB 2 , AFG 1 and AFG 2 are also considered potentially harmful to humans and animals 16. Aflatoxins are synthesised under appropriate ecological conditions by some competent mould strains belonging to the Aspergillus flavus, A. parasiticus and A. nomius groups 17. Most toxigenic strains of A. parasiticus produce AFB 1 , AFB 2 , AFG 1 and AFG 2 , while toxigenic strains of A. flavus only produce AFB 1 and AFB 2 18.…”

Forage as a Primary Source of Mycotoxins in Animal Diets

“…Technologies for aflatoxin isolation with bentonite, modified bentonite as well as chitosan have been tested [30–35]. …”