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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Pathogens and mycotoxins are serious public health risks for humans and food safety in milk. This study concentrated on detecting Staphylococcus aureus and Ochratoxin A (OTA) in 210 pasteurized milk from ten urban Beijing districts to suggest the co-occurrence of S. aureus with toxin-producing genes and OTA in milk and the possible risk. S. aureus was identified by physiological and biochemical experiments and molecular biology experiments, and enterotoxin genes were identified by PCR. OTA was detected by LC-MS/MS. The study found 29 isolates of S. aureus, of which 17.24% had the sea gene encoding enterotoxin A. OTA was detected in 31 out of 120 samples and the maximum amount of detection was 18.8 μg/kg. The results of this study indicate that when failing to guarantee the cold chain, the presence of S. aureus with enterotoxin genes in milk will present a risk to food safety. Furthermore, the high detection rates and levels of OTA in milk suggest that OTA is a hidden risk. The co-occurrence of S. aureus and OTA in milk is a food safety concern and there is a need to control the occurrence of these two biohazards in milk.

Details

Title
Co-Occurrence of Staphylococcus aureus and Ochratoxin A in Pasteurized Milk
Author
Zhang, Zhenzhen 1 ; Song, Yanmin 2 ; Ma, Liyan 3 ; Huang, Kunlun 4 ; Liang, Zhihong 4 

 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China 
 Beijing JTM International Food Co., Ltd., Beijing 101400, China 
 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China 
 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China; Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China 
First page
718
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
20726651
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2728533526
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.