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Abstract

Fusarium head blight (FHB) is one of the most important diseases that occurs in cereal regions worldwide and causes serious economic damage. This disease can be caused by several Fusarium species with Fusarium graminearum sensu stricto being the most common pathogen isolated from several crops. The aim of this study was to report the occurrence of F. graminearum sensu stricto on rye grains collected from field samples in Argentina and to determine the potential ability to produce deoxynivalenol (DON), nivalenol (NIV) and zearalenone (ZEA). Based on morphological characteristics, the isolate was identified as F. graminearum sensu stricto. To confirm molecularly, portions of the RED and TRI genes were sequenced and showed 99% similarity with the F. graminearum sensu stricto sequences available in the NCBI database. The potential to produce DON, 15-acetyldeoxynivalenol (15-ADON) and ZEA was determined. Moreover, Koch´s postulates were carried out. To our knowledge, this is the first report of F. graminearum sensu stricto associated with rye kernels in Argentina.

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Authors and Affiliations

Mauro Martinez
Maria Dinolfo
Eliana Castañares
Sebastian Stenglein
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Abstract

The present study aimed to investigate the contamination of poultry feed with aflatoxin B1 and zearalenone at laying hen farms in Tehran suburbs. The poultry feed was selected from five laying hen farms. A total of 60 poultry feed samples were collected from each farm during four consecutive seasons, from spring to winter of 2021. High-performance liquid chromatography was used to determine the amount of aflatoxin B1 and zearalenone. The mean aflatoxin B1 and zearalenone concentrations in various seasons showed significant differences (p<0.01). The highest reported aflatoxin concentration was in winter, with a mean concentration of 1366.53±77.85 ng/kg. The lowest concentrations were reported in autumn and summer, indicating a significant difference (p<0.01). The highest concentration of zearalenone was reported in summer, with a mean concentration of 150.72±10.35 μg/kg. The lowest concentration was reported in winter, with a mean concentration of 22.87±10.35 μg/kg, indicating a statistically significant difference (p<0.01). Overall, the concentrations of aflatoxin B1 and zearalenone toxins significantly differed in various poultry farms. The poultry farm D had the highest aflatoxin contamination with a mean concentration of 648.08±59.89 ng/kg. Poultry farms A, B, and C had the highest zearalenone concentrations with mean concentrations of 125.17±20.61, 96.04±20.61, and 99.49±20.61 μg/kg, respectively. Autumn was the only season showing significant differences regarding zearalenone toxin concentration in poultry farms.
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Authors and Affiliations

A. Sohrabi
1
M.H. Movassaghghazani
2
J. Shayegh
3
A.R. Karamibonari
3
F. Tajedini
4

  1. Faculty of Veterinary Medicine, Shabestar Branch, Islamic Azad University, Shabestar, Iran
  2. Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Shabestar Branch, Islamic Azad University, Shabestar, Iran
  3. Department of Pathobiology, Faculty of Veterinary Medicine, Shabestar Branch, Islamic Azad University, Shabestar, Iran
  4. Department of Basic Sciences, Faculty of Veterinary Medicine, Karaj Branch, Islamic Azad University, Karaj, Iran

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