Archives
-
Join 343 other subscribers
KSWFoodWorld
Blog Stats
- 427,952 Views
Category Archives: OTA
Research – Comprehensive Insights into Ochratoxin A: Occurrence, Analysis, and Control Strategies
Ochratoxin A (OTA) is a toxic mycotoxin produced by some mold species from genera Penicillium and Aspergillus. OTA has been detected in cereals, cereal-derived products, dried fruits, wine, grape juice, beer, tea, coffee, cocoa, nuts, spices, licorice, processed meat, cheese, and other foods. OTA can induce a wide range of health effects attributable to its toxicological properties, including teratogenicity, immunotoxicity, carcinogenicity, genotoxicity, neurotoxicity, and hepatotoxicity. OTA is not only toxic to humans but also harmful to livestock like cows, goats, and poultry. This is why the European Union and various countries regulate the maximum permitted levels of OTA in foods. This review intends to summarize all the main aspects concerning OTA, starting from the chemical structure and fungi that produce it, its presence in food, its toxicity, and methods of analysis, as well as control strategies, including both fungal development and methods of inactivation of the molecule. Finally, the review provides some ideas for future approaches aimed at reducing the OTA levels in foods.
Research- Determination of Mycotoxins in Plant-Based Meat Alternatives (PBMAs) and Ingredients after Microwave Cooking
Abstract
In this study, we investigate the role of microwave cooking in reducing mycotoxin contamination in plant-based food matrices, with a focus on veggie burgers (purchased and home-made) and their ingredients (soybean, potatoes, zucchini, carrots). Two different conditions were studied (Max–Min) that were 800 W for 60 s and 800 W for 90 s, respectively. The degradation patterns of aflatoxins (AFB1, AFB2, AFG1, AFG2), fumonisins (FB1, FB2, FB3), trichothecenes (T2, HT2, ZEA), and ochratoxin A (OTA) were studied. The extraction procedures were conducted with the QuEChERS extraction, and the analyses were conducted with liquid chromatography–tandem mass spectrometry (LC-MS/MS). Principal component analysis (PCA) showed that degradation under microwave cooking varies considerably across different food matrices and cooking conditions. This study provides valuable insights into the degradation of mycotoxins during microwave cooking and underscores the need for more research in this area to ensure food safety.
Research – Fusarium Mycotoxins and OTA in Beer from Shanghai, the Largest Megacity in China: Occurrence and Dietary Risk Assessment
Abstract
Beer is susceptible to mycotoxin contamination originating from infected grains. It could be that mycotoxins are not completely removed during the brewing process and remain in the final product. Nevertheless, there have been no surveys of exposure to mycotoxin for Chinese inhabitants through beer consumption. This study aimed to investigate the presence of eight mycotoxins in 158 beer samples purchased in Shanghai, the largest megacity in China. The multiple mycotoxins determination was carried out using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Our findings revealed that 48.1% (76/158) of the beer samples were contaminated with Fusarium toxins. Deoxynivalenol-3-glucoside (D3G) and zearalenone (ZEN) were detected in 34.81% and 16.46% of the total samples, respectively. The significant differences between D3G/ZEN contamination and various beer types were performed. Furthermore, this study performed a health risk assessment for Shanghai residents based on data for Fusarium toxins and ochratoxin A (OTA) present in beer for the first time. The results revealed that the 95th percentile dietary exposures of Shanghai residents did not pose any chronic or acute health risks, either individually or in combination. Dietary exposures to Fusarium toxins revealed different risk levels among residents. The cumulative health risk for women is higher than that for men at the same beer consumption. In addition, the acute risk of DONs exposure for adults deserves concern. The insights obtained from this study may be of assistance for beer manufacturers and governmental regulators to further develop beer monitoring and guarantee public health.
Posted in Decontamination Microbial, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Research, Food Microbiology Testing, microbial contamination, Microbial growth, Microbiological Risk Assessment, Microbiology, Microbiology Investigations, Microbiology Risk, Mycotoxin, Ochratoxin, Ochratoxin A, OTA
Composition-Based Risk Estimation of Mycotoxins in Dry Dog Foods
Abstract
The risk of mycotoxins co-occurrence in extrusion-produced dry foods increases due to their composition based on various grains and vegetables. This study aimed to validate a risk estimation for the association between ingredients and the ELISA-detected levels of DON, FUM, ZEA, AFs, T2, and OTA in 34 dry dog food products. The main ingredients were corn, beet, and oil of different origins (of equal frequency, 79.41%), rice (67.6%), and wheat (50%). DON and FUM had the strongest positive correlation (0.635, p = 0.001). The presence of corn in the sample composition increased the median DON and ZEA levels, respectively, by 99.45 μg/kg and 65.64 μg/kg, p = 0.011. In addition to DON and ZEA levels, integral corn presence increased the FUM median levels by 886.61 μg/kg, p = 0.005. For corn gluten flour-containing samples, DON, FUM, and ZEA median differences still existed, and OTA levels also differed by 1.99 μg/kg, p < 0.001. Corn gluten flour presence was strongly associated with DON levels >403.06 μg/kg (OR = 38.4, RR = 9.90, p = 0.002), FUM levels >1097.56 μg/kg (OR = 5.56, RR = 1.45, p = 0.048), ZEA levels >136.88 μg/kg (OR = 23.00, RR = 3.09, p = 0.002), and OTA levels >3.93 μg/kg (OR = 24.00, RR = 3.09, p = 0.002). Our results suggest that some ingredients or combinations should be avoided due to their risk of increasing mycotoxin levels.
Posted in Aflatoxin, Animal Feed, Animal Feed Mould Toxin, Animal Feed Testing, Aspergillus Toxin, Decontamination Microbial, deoxynivalenol, DON, Food Micro Blog, Food Microbiology Blog, Food Toxin, Fumomisins, Fumonsins, Fusarium Toxin, microbial contamination, Microbial growth, Microbiological Risk Assessment, Microbiology, Microbiology Investigations, Microbiology Risk, Mold Toxin, Mould Toxin, Mycotoxin, Ochratoxin A, OTA, Pet Food, Pet Food Aflatoxin, Pet Food Testing, Zearalenone
Mycotoxins – New EU maximum limits for Ochratoxin A in certain foodstuffs
On August 8th was published the Commission Regulation (EU) 2022/1370 of 5 August 2022 amending Regulation (EC) No 1881/2006 as regards maximum levels of Ochratoxin A in certain foodstuffs.
Ochratoxin A (OTA) is a naturally occurring foodborne mycotoxin produced by various fungi of the genus Aspergillus and Penicillium, and it can be found in a wide variety of agricultural commodities, such as grains, seeds and beans, dried fruits, spices, and roots.
OTA is formed during sun drying and storage of crops, and, due to its stability under moderate heating, it can persist along the food production chain. However, losses ranging up to 90% have been observed at temperatures above 180°C.
Several toxic effects associated with OTA have been reported over the years.
The International Agency for Research on Cancer has included OTA in its Group 2 carcinogens, due to its kidney carcinogenicity, even if the mechanisms of genotoxicity are still unclear.
In 2006 the European Food Safety Authority performed a first risk assessment for OTA. In agreement with this assessment, the European Commission established in Regulation (EC) 1881/2006 maximum admissible levels of OTA for human consumption in many foodstuffs, such as cereals, coffee, grapes, grapefruit, dried vine fruits, wine, spices, and liquorice.
In recent years, further findings of high levels of Ochratoxin A were observed in food products for which no maximum levels were set at EU level, this raised questions regarding the necessity of setting new maximum levels for OTA in these foods.
In May 2020, EFSA published a revision of the OTA risk assessment, taking into account the new scientific evidence.
Based on this new risk assessment, the EU Commission established the Regulation (EU) 2022/1370, which revised the maximum levels for OTA present in Regulation (EC) 1881/2006 as follows:
• setting a maximum level for foods not yet included that contribute to human exposure to OTA;
• setting a level for non-alcoholic malt beverages and date syrup, pending the determination of a link with the OTA content of malt and dates;
• reducing the levels already set in certain foods (e.g. bakery products, dried vine fruit, roasted coffee and soluble coffee);
• the existing provisions for ochratoxin A in certain spices has been broadened to all spices.
For cheese and ham, it has been established that additional monitoring on the presence of ochratoxin A is appropriate before the setting of maximum levels.
The new Regulation will enter into force on the 28th of August 2022 and it shall apply from 1 January 2023.
Posted in Decontamination Microbial, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Research, Food Microbiology Testing, Food Toxin, microbial contamination, Microbial growth, Microbiological Risk Assessment, Microbiology, Microbiology Investigations, Microbiology Risk, Mould Toxin, Mycotoxin, Ochratoxin, Ochratoxin A, OTA
Research – Removal of Ochratoxin A from Grape Juice by Clarification: A Response Surface Methodology Study
This study achieved maximum removal of ochratoxin A (OTA) during the grape juice clarification process with minimal reduction in antioxidant compounds (phenolic acid, flavonoids, and antioxidant capacity by FRAP) by the RSM method. Independent variables included three types of clarifiers—gelatin, bentonite, and diatomite (diatomaceous earth)—at a concentration level of 0.25–0.75% and clarification time of 1–3 h. OTA was measured by high-performance liquid chromatography with fluorescence detection. Clarifying agent concentration and clarification time affected the reduction amount of OTA and antioxidant compounds in grape juice. There was a direct linear correlation between the reduction amounts of OTA and antioxidant compounds and capacity with the concentration of bentonite, gelatin, and diatomite, and the clarification time. The reduction amount of OTA and antioxidant capacity followed the linear mode. However, the decreased phenolic acid and flavonoid values followed the quadratic model. The study results showed that if the concentrations of bentonite, gelatin, and diatomite and clarification time were 0.45, 0.62, 0.25%, and 1 h, respectively, the maximum amount of OTA reduction (41.67%) occurred. Furthermore, the phenolic acid, flavonoid, and antioxidant activity decrease amounts were at their lowest levels, i.e., 23.86, 7.20, and 17.27%, respectively. View Full-Text
Posted in Decontamination Microbial, Food Micro Blog, Food Microbiology, Food Microbiology Blog, Food Microbiology Research, Food Microbiology Testing, Food Technology, Food Toxin, microbial contamination, Microbiological Risk Assessment, Microbiology, Microbiology Investigations, Mold Toxin, Mould Toxin, Mycotoxin, Ochratoxin, OTA, Research, Technology, Toxin
