Molecular and HPLC-based approaches for detection of aflatoxin B1 and ochratoxin A released from toxigenic Aspergillus species in processed meat

BMC Microbiology

Eman M. El-Diasty¹  Sarah M. Abbas¹  Abdelazeem M. Algammal²  Mahmoud E. Elsayed²  Helal F. Hetta³  Hany R. Hashem⁴  Hazem Ramadan⁵  Norhan S. Sheraba⁶ 

[1] Animal Health Research Institute, Dokki, 12618, Giza, Egypt;Department of Bacteriology, Immunology and Mycology, Faculty of Veterinary Medicine, Suez Canal University, 41522, Ismailia, Egypt;Department of Medical Microbiology and Immunology, Faculty of Medicine, Assuit University, 71515, Assuit, Egypt;Department of Microbiology and Immunology, Faculty of Pharmacy, Fayoum University, 63514, Fayoum, Egypt;Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, 35516, Mansoura, Egypt;VACSERA, The Holding Company for Biological Products and Vaccines, 12511, Giza, Egypt;

关键词: A. flavus;    A. ochraceus;    Meat-products, HPLC;    Aflatoxin B;    Ochratoxin A;    Gene sequencing;   

DOI  :  10.1186/s12866-021-02144-y

来源: Springer

【 摘 要 】

BackgroundMeat-products are considered an enriched media for mycotoxins. This study aimed to investigate the prevalence of toxigenic Aspergillus species in processed meat samples, HPLC-quantitative measurement of aflatoxin B1 and ochratoxin A residues, and molecular sequencing of aflR1 and pks genes. One hundred and twenty processed beef meat specimens (basterma, sausage, and minced meat; n = 40 for each) were collected from Ismailia Province, Egypt. Samples were prepared for total mold count, isolation, and identification of Aspergillus species. All samples were analyzed for the production of both Aflatoxin B1 and Ochratoxin A mycotoxins by HPLC. Molecular identification of Aspergillus flavus and Aspergillus ochraceus was performed using PCR amplification of the internal transcribed spacer (ITS) region; furthermore, the aflR1 and pks genes were sequenced.ResultsThe total mold count obtained from sausage samples was the highest one, followed by minced meat samples. The prevalence of A. flavus was (15%), (7.5%), and (10%), while the prevalence of A. ochraceus was (2.5%), (10%), and (0%) in the examined basterma, sausage, and minced meat samples, respectively. Using PCR, the ITS region was successfully amplified in all the tested A. flavus and A. ochraceus strains. Aflatoxin B1 was detected in six basterma samples (15%). Moreover, the ochratoxin A was detected only in four sausage samples (10%). The aflR1 and pks genes were amplified and sequenced successfully and deposited in the GenBank with accession numbers MF694264 and MF694264, respectively.ConclusionsTo the best of our knowledge, this is the first report concerning the HPLC-Molecular-based approaches for the detection of aflatoxin B1 and ochratoxin A in processed beef meat in Egypt. The production of aflatoxin B1 and ochratoxin A in processed meat constitutes a public health threat. Aflatoxin B1 is commonly associated with basterma samples. Moreover, ochratoxin A was detected frequently in sausage samples. The routine inspection of mycotoxins in processed meat products is essential to protect human consumers.

【 授权许可】

CC BY