Mycotoxin producing potential of some isolates of Aspergillus flavus and Eurotium groups from meat products.
All strains (92) of A. flavus group proved to be positive for production of aflatoxin (45 to 1200 micrograms/50 ml medium) on potato dextrose liquid medium, while 59 strains only proved to be positive (35-310 micrograms/50 ml) on 15% NaCl potato-dextrose liquid medium. Most of the strains tested of A. flavus, A. flavus var. columnaris and A. oryzae produced aflatoxins B1, B2, G1 & G2. All positive strains of A. tamarii produced aflatoxins G1 & G2 while the tested isolate of A. zonatus produced aflatoxins B1 & G1. Of 95 strains tested of Eurotium, aflatoxins B1 & G1 were produced by one strain of each of E. chevalieri var. intermedium, E. repens and E. rubrum. Gliotoxin was detected in the extract of two strains of E. chevalieri and one strain of each of E. chevalieri var. intermedium and E. pseudoglaucum on the salt-free medium, and two strains of each of E. chevalieri, E. chevalieri var. intermedium and one of E. pseudoglaucum on 15% NaCl medium. Sterigmatocystin was produced by some strains of E. chevalieri, E. chevalieri var. intermedium, E. amstelodami, E. pseudoglaucum and E. rubrum on the two experimental media. One strain only of E. repens produced ochratoxin A while citrinin was detected in the extract of one strain of E. pseudoglaucum.
el-Kady
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Botany Department, Faculty of Science, Assiut University, Egypt.
el-Maraghy
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Zohri
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D000348:Aflatoxins / Q000096:biosynthesis* / Q000302:isolation & purification; D001203:Ascomycota / Q000378:metabolism*; D001231:Aspergillus flavus / Q000378:metabolism*; D003470:Culture Media; D008460:Meat / Q000382:microbiology*; D008461:Meat Products / Q000382:microbiology*
D000348:Aflatoxins; D003470:Culture Media