scholarly journals DETERMINATION OF AFLATOXIN M1 LEVELS IN BOVINE FARMED MILK WITH SPECIAL REFERENCE TO THE LEVELS OF AFLATOXIN B1 IN THE ANIMAL FEED

2011 ◽  
Vol 57 (131) ◽  
pp. 1-11
2012 ◽  
Vol 6 (3) ◽  
pp. 767-774 ◽  
Author(s):  
Wenxiao Jiang ◽  
Zhanhui Wang ◽  
Greta Nölke ◽  
Jing Zhang ◽  
Lanlan Niu ◽  
...  

2015 ◽  
Vol 5 ◽  
pp. 270-273 ◽  
Author(s):  
Srdjan Stefanovic ◽  
Danka Spiric ◽  
Radivoj Petronijevic ◽  
Jelena Nedeljkovic Trailovic ◽  
Dragan Milicevic ◽  
...  

2019 ◽  
Vol 13 (2) ◽  
pp. 19-23
Author(s):  
Masoumeh Mahmoodi Maymand ◽  
◽  
Mansooreh Mazaheri ◽  
Mahboobeh Talebi Mehrdar ◽  
◽  
...  

Background: Mycotoxins are the secondary metabolites of molds and have adverse effects on humans, animals, and crops, resulting in illnesses and economic losses. Aflatoxin M1 (AFM1) is a hepatocarcinogen found in the milk from animals that have consumed feeds contaminated with aflatoxin B1 (AFB1). Milk is a highly nutritious food and is a source of necessary macro- and micro-nutrients for the growth, development and maintenance of human health. Methods: The presence of AFM1 was investigated in 70 samples of imported pasteurized and powdered milk products available to the Iranian consumers. The level of AFM1 was determined by HPLC method equipped with immunoaffinity cleanup. Results: The results showed that 32% of the analyzed samples were positive for AFM1 at 0.05-3.31 μg/kg. Also, 16% of analyzed samples were positive for AFM1at concentrations higher than the limit permitted by the Iranian standards. Conclusion: The detection of AFM1 contamination in the analyzed samples indicates the importance of the health of animal feeds. Thus, monitoring the imported feed materials, especially those arriving at Iranian borders is crucial in the prevention of AFM1 and AFB1 contaminations spreading across the domestic market.


2020 ◽  
pp. 315-323
Author(s):  
Areej Zuhair Azeez ◽  
Mrwa Thamer Hindi ◽  
Maha Muhamed Khudiar ◽  
Adel Saadi AL Saadi ◽  
Noor Ibrahim Khadim

The aim of this study is to identify aflatoxin secretion isolates in animal feeds by using HPLC and PCR  methods . In this study we collected fourty three samples of animal feed from different sites in Iraq (maize ,soybean ,sunflower grain ,barley grain, wheat). we isolated fungi  on potato dextrose agar, Aspergillus flavus  fungi was isolated from this samples  and identified the enzyme activities were tested for this isolate. The detection and determination for aflatoxin secretion of the isolates were done by using High Performance Liquid Chromatography (HPLC) technique. Twelve isolates shown Aflatoxin B1 secretion. Polymrease chain reaction ( PCR) technique is an alternative method to detect for Aspergillus spp. strains that secret aflatoxin by using specific primers( ITS1) endogenous gene for  Aspergillus flavus  and (ord , nor) genes  for aflatoxin B1 secreation, the PCR technique  considered to be an important role for safety and quality in industrial food and feed.


Chemosensors ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 121
Author(s):  
Michail D. Kaminiaris ◽  
Sophie Mavrikou ◽  
Maria Georgiadou ◽  
Georgia Paivana ◽  
Dimitrios I. Tsitsigiannis ◽  
...  

Aflatoxins are highly toxic fungal secondary metabolites that often contaminate food and feed commodities. An electrochemical immunosensor for the determination of aflatoxin B1 (AFB1) was fabricated by immobilizing monoclonal AFB1 antibodies onto a screen-printed gold electrode that was modified with carbo-methyldextran by N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride/N-hydroxysuccinimide cross-linking. An electrochemical interfacial modelling of biomolecular recognition was suggested and reasonably interpreted. Impedance technology was employed for the quantitative determination of AFB1. The limit of detection concentration of AFB1 for standard solutions and spiked pistachio samples was 0.5 ng/mL and 1 ng/mL, respectively. The immunosensor was able to successfully determine AFB1 concentrations in the range of 4.56–50.86 ng/mL in unknown pistachio samples. Comparative chromatographic analysis revealed that AFB1 concentrations that were higher than 345 ng/mL were not within the immunosensor’s upper limits of detection. Selectivity studies against Ochratoxin A and Aflatoxin M1 demonstrated that the proposed AFB1 immunosensor was able to differentiate between these other fungal mycotoxins. The novel electrochemical immunosensor approach has the potential for rapid sample screening in a portable, disposable format, thus contributing to the requirement for effective prevention and the control of aflatoxin B1 in pistachios.


2013 ◽  
Vol 19 (No. 1) ◽  
pp. 8-12 ◽  
Author(s):  
J. Leszczyńska ◽  
J. MasŁowska ◽  
A. Owczarek ◽  
U. Kucharska

To determine the total content of aflatoxins, aflatoxin B1 and aflatoxin M1 in food the ELISA method was used. Milk, dairy products and cereal samples were mainly investigated. A few samples were found to be contaminated with aflatoxins. A great usability of the ELISA method for aflatoxin determination in food was established. Selectivity and sensitivity of the method is reported.


1979 ◽  
Vol 62 (5) ◽  
pp. 1080-1082
Author(s):  
Mary W Trucksess ◽  
Leonard Stoloff

Abstract A method for the determination of aflatoxin Bx in eggs was applicable for aflatoxin B1 in liver, but ineffective for aflatoxin Mx in liver because of poor recovery of added aflatoxin and interferences in thin layer chromatography. The method was modified by the addition of citric acid to the extracting solvent and ammonium sulfate to the extract solution for removing protein. The elution system for silica gel column cleanup was also changed by substituting methanol for acetone, and adding a step for confirmation of aflatoxin M1 identity. The method has been used successfully for survey and research on aflatoxin residues in animal tissues.


Author(s):  
Roice Eliana Rosim ◽  
Carlos Augusto Fernandes de Oliveira ◽  
Carlos Humberto Corassin

A contaminação de alimentos por aflatoxinas, principalmente, a aflatoxina B1 (AFB1) representa um problema mundial para a saúde humana e animal. Uma forma de avaliar a exposição a estes contaminantes é analisando a dieta para verificar a ocorrência destes compostos. Esta metodologia, no entanto, tem limitações devido à variabilidade das aflatoxinas encontradas nos alimentos e às diferenças individuais na toxicocinética dos compostos. Por outro lado, o biomonitoramento de aflatoxinas em fluidos biológicos se utilizando de biomarcadores gera informações mais confiáveis sobre a exposição a estas toxinas nos indivíduos. O uso de adsorventes químicos na ração animal possibilita a detoxificação de aflatoxinas sem produzir efeitos tóxicos nem alterar as propriedades nutricionais. Este trabalho teve por objetivo revisar os dados publicados sobre a eficiência in vitro e in vivo de adsorventes para aflatoxinas, bem como estudos referentes ao uso da aflatoxina M1 (AFM1) e da AFB1-lisina como biomarcadores para avaliar a redução da biodisponibilidade da AFB1 por adsorventes em rações. Trabalhos relevantes publicados nos últimos dez anos (2009-presente) foram selecionados nas bases de dados PubMed, Science Direct e Google Scholar. A determinação de AFM1 no leite e/ou na urina, bem como de AFB1-lisina no soro, indica a biodisponibilidade individual da AFB1 em ensaios para avaliar a eficiência de adsorventes em animais. Deste modo, a utilização destes biomarcadores permite reduzir os custos dos ensaios in vivo, além de proporcionar maior padronização dos experimentos e possibilitar a avaliação da eficiência dos adsorventes em condições de campo. Palavras chave: AFB1. - Adsorventes Minerais. Biomarcadores de Exposição - AFB1-lisina - AFM1           AbstractFood contamination by aflatoxins, mainly aflatoxin B1 (AFB1), is a worldwide concern for human and animal health. A possible way to assess the exposure to these contaminants is through the diet analyses to verify the occurrence of mycotoxins. However, this methodology has important limitations due to the variability of mycotoxins found in the food and the individual differences in the toxicokinetics of the compounds. On the other hand, biomonitoring of aflatoxins in biological fluids using biomarkers generates more reliable information on the exposure to these toxins in individuals. The use of chemical adsorbents in animal feed makes it possible to detoxify mycotoxins without producing toxic effects or altering the nutritional properties. The aim of this study was to revise the available published data on the in vitro and in vivo efficacy of adsorbents for aflatoxins, as well as studies on the use of aflatoxin M1 (AFM1) and AFB1-lysine as biomarkers to evaluate the reduction in the bioavailability of AFB1 by adsorbents in feed. Relevant articles published in the last 10 years (2009-present) were selected in PubMed, Science Direct and Google Scholar. Determination of AFM1 in milk and/or urine, and AFB1-lysine in serum, indicate the individual bioavailability of AFB1 in trials conducted for evaluation of adsorbent’s efficiency in animals. Thus, the use of these biomarkers may reduce the costs of in vivo trials, increase the standardization of experiments, and evaluate the adsorbents’ efficiency under field conditions. Keywords: Aflatoxin B1 – Clays - Exposure Biomarkers - Aflatoxin B1-lysine Aflatoxin M1. 


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