In:
Journal of Molecular Biology Research, Canadian Center of Science and Education, Vol. 6, No. 1 ( 2016-11-30), p. 121-
Abstract:
〈 p class="1Body" 〉 Aflatoxins are among the most important Mycotoxins that are mainly produced by various 〈 em 〉 Aspergillus 〈 /em 〉 species, specially 〈 em 〉 Aspergillus flavus 〈 /em 〉 and 〈 em 〉 Aspergillus parasiticus 〈 /em 〉 . Aflatoxins are carcinogenetic and immunosuppressive, so that can lead to acute liver damage, cirrhosis of the liver and hepatocarcinoma induction. Consuming the feed contaminated by 〈 em 〉 Aspergillus 〈 /em 〉 puts humans and animals under the danger of Aflatoxins that are considered as an important threats for human and animal health. The purpose of the present study was to make distinction between Aflatoxinogenetic and non-Aflatoxinogenetic strains and 〈 em 〉 Aspergillus Flavus 〈 /em 〉 using PCR and TLC and the expression of five Aflatoxin biosynthesis genes including 〈 em 〉 aflD (nor-1) 〈 /em 〉 , 〈 em 〉 aflP( omtA) 〈 /em 〉 , 〈 em 〉 aflO (omtB) 〈 /em 〉 , 〈 em 〉 aflQ(ordA) 〈 /em 〉 , 〈 em 〉 aflR 〈 /em 〉 in 40 strains was investigated using PCR. In this study, a number of 40 〈 em 〉 Aspergillus flavus 〈 /em 〉 strains from 67 species of cattle feed from 21 industrial warehouses of various areas of Tehran and Alborz were used. After isolation and culture in exclusive environment of yeast extract of sucrose agar, the isolated 〈 em 〉 Aspergillus 〈 /em 〉 strains were investigated by microscopic and macroscopic methods. In order to make distinction between Aflatoxinogenetic and non-Aflatoxinogenetic strains, PCR method and TLC techniques were used. The results showed that only 7 strains (1, 3, 5, 14, 22, 34, and 38) were Aflatoxin-producers fungi and the rest 33 samples were non-Afatoxin-producers fungi. Since 〈 em 〉 Aspergillus flavus 〈 /em 〉 is the main contaminator of cattle feed, there is a need to develop a simple, rapid and sensitive method to identify Aflatoxigenetic fungi, particularly between Aflatoxinogenetic and non-Aflatoxinogenetic strains of AF. 〈 /p 〉
Type of Medium:
Online Resource
ISSN:
1925-4318
,
1925-430X
DOI:
10.5539/jmbr.v6n1p121
Language:
Unknown
Publisher:
Canadian Center of Science and Education
Publication Date:
2016
detail.hit.zdb_id:
2649718-9
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