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

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Abdelazeem M. Algammal ◽  
Mahmoud E. Elsayed ◽  
Hany R. Hashem ◽  
Hazem Ramadan ◽  
Norhan S. Sheraba ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Meat Products ◽  
Its Region ◽  
Processed Meat ◽  
Isolation And Identification ◽  
Beef Meat ◽  
Meat Samples ◽  
Aflatoxin B ◽  
Minced Meat ◽  
Mold Count

Abstract Background Meat-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. Results The 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. Conclusions To 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.

Occurrence and Survival of Verocytotoxin-Producing Escherichia coli O157 in Meats Obtained from Retail Outlets in The Netherlands

1999 ◽  
Vol 62 (10) ◽  
pp. 1115-1122 ◽  
Author(s):  
A. E. HEUVELINK ◽  
J. T. M. ZWARTKRUIS-NAHUIS ◽  
R. R. BEUMER ◽  
D E. de BOER
Keyword(s):  
Escherichia Coli ◽  
The Netherlands ◽  
Meat Products ◽  
Storage Period ◽  
Processed Meat ◽  
Raw Meat ◽  
Pork Products ◽  
Minced Beef ◽  
Beef Products ◽  
Meat Samples

In 1996 and 1997, 2,941 fresh and processed meat products obtained from supermarkets and butcher shops in The Netherlands were examined for the presence of verocytotoxin-producing Escherichia coli of serogroup O157 (O157 VTEC). Additionally, the fate of O157 VTEC in raw meat products stored at low temperatures and the effect of different additives were evaluated. O157 VTEC strains were isolated from 6 (1.1%) of 571 samples of raw minced beef, 2 (0.5%) of 402 samples of raw minced mixed beef and pork, 1 (1.3%) of 76 samples of raw minced pork, 1 (0.3%) of 393 samples of other raw pork products, and 1 (0.3%) of 328 samples of cooked or fermented ready-to-eat meats. Other raw beef products (n = 223) and meat samples originating from poultry (n = 819), sheep or lamb (n = 46), or wild animals (n = 83) were all found to be negative for O157 VTEC. For the survival experiments we used tartaar (minced beef with a fat content of less than 10%) and filet americain (tartaar mixed with a mayonnaise-based sauce [80 to 20%]). The O157 VTEC strain tested was able to survive in tartaar and filet americain stored at −20, 0, 5, or 7°C for 3 days. At both 7 and at 15°C, O157 VTEC counts in tartaar and filet americain remained virtually unchanged throughout a storage period of 5 days. Addition of acetic acid (to pH 4.0), sodium lactate (1 and 2% [wt/wt]), or components of the lactoperoxidase–thiocyanate–hydrogen peroxide system to filet americain did not result in a reduction of viable O157 VTEC cells during storage at 7 or 15°C. It was concluded that raw meat contaminated with O157 VTEC will remain a hazard even if the meat is held at low or freezing temperatures.

scholarly journals Citrobacter braakii Yield False-Positive Identification as Salmonella, a Note of Caution

Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2177
Author(s):  
Joanna Pławińska-Czarnak ◽  
Karolina Wódz ◽  
Magdalena Kizerwetter-Świda ◽  
Tomasz Nowak ◽  
Janusz Bogdan ◽  
...  
Keyword(s):  
False Positive ◽  
Salmonella Enterica ◽  
Meat Products ◽  
Animal Origin ◽  
Biochemical Tests ◽  
Salmonella Spp ◽  
Isolation And Identification ◽  
False Positive Identification ◽  
Food Of Animal Origin ◽  
Meat Samples

Background: Globally, Salmonella enterica is one of the leading causes of foodborne illness in humans. Food of animal origin is obligatorily tested for the presence of this pathogen. Unfortunately, in meat and meat products, this is often hampered by the presence of background microbiota, which may present as false-positive Salmonella. Methods: For the identification of Salmonella spp. from meat samples of beef, pork, and poultry, the authorized detection method is PN-EN ISO 6579-1:2017-04 with the White–Kauffmann–Le Minor scheme, two biochemical tests: API 20E and VITEK II, and a real-time PCR-based technique. Results: Out of 42 presumptive strains of Salmonella, 83.3% Salmonella enterica spp. enterica, 14.3% Citrobacter braakii, and 12.4% Proteus mirabilis were detected from 180 meat samples. Conclusions: Presumptive strains of Salmonella should be identified based on genotypic properties such as DNA-based methods. The aim of this study was the isolation and identification of Salmonella spp. from miscellaneous meat sorts: beef, pork, and poultry.

scholarly journals Prevalence of resistant Staphylococcus aureus strains in frozen meat and their control using phytosynthesized selenium nanoparticles

2021 ◽  
Vol 48 (4) ◽  
Author(s):  
Mohammed S. Al-Saggaf ◽  
Keyword(s):  
Staphylococcus Aureus ◽  
Saudi Arabia ◽  
Molecular Identification ◽  
Resistance Genes ◽  
Meat Products ◽  
Multidrug Resistant ◽  
Selenium Nanoparticles ◽  
Phyllanthus Emblica ◽  
Meat Samples ◽  
Minced Meat

Staphylococcus aureus continually threatens the safety of meat products, especially the multidrug-resistant (MDR) strains. The screening of MDR S. aureus prevalence in marketed meat products in Saudi Arabia was conducted via molecular identification of resistance genes (cfr, gyrA, and gyrB) that occurred in isolated bacteria. The green phytosynthesis of selenium nanoparticles (Se-NPs) was also conducted, using the fruits’ extract of Phyllanthus Emblica (PeE), for their evaluation as antibacterial nanocomposites against MDR S. aureus isolates. The prevalence percentage (PP) of S. aureus in meat samples was 14.2%, where the MDR S. aureus prevalence was 9.2%. The highest prevalence of S. aureus isolates was attained from minced meat samples, whereas the highest PP for multidrug-resistant (MDR) S. aureus was recorded from sausages samples. The PeE-synthesized Se-NPs had negative charges, spherical shapes, and well-disperssion with mean diameters of 11.98 nm. The anti- S. aureus activities of PeE, phytosynthesized Se-NPs, and their composite (PeE/Se-NPs) were proved qualitatively and quantitatively against the different standard and MDR strains, the antibacterial action of PeE/Se-NPs was the strongest. The treatment of MDR S. aureus with PeE/Se-NPs led to severe cells’ lyses/explosion after 8 h of exposure. The nanocomposites from PeE/Se-NPs are recommended for controlling MDR S. aureus in meat.

scholarly journals Combined Loop-Mediated Isothermal Amplification Assays for Rapid Detection and One-Step Differentiation of Campylobacter jejuni and Campylobacter coli in Meat Products

2021 ◽  
Vol 12 ◽  
Author(s):  
Antonia Kreitlow ◽  
André Becker ◽  
Marwa F. E. Ahmed ◽  
Sophie Kittler ◽  
Ulrich Schotte ◽  
...  
Keyword(s):  
Real Time ◽  
Real Time Pcr ◽  
Meat Products ◽  
Lamp Assay ◽  
Culture Method ◽  
Campylobacter Coli ◽  
Standard Culture ◽  
One Step ◽  
Meat Samples ◽  
Minced Meat

A loop-mediated isothermal amplification (LAMP) assay system was established, allowing rplD gene-based simultaneous detection of Campylobacter jejuni and Campylobacter coli in enriched meat products. Additionally, one-step differentiation of target species on agar plates was enabled by cdtC gene- and gyrA gene-based duplex LAMP. Both the rplD and cdtC–gyrA LAMP assays amplified the target sequences in all 62 C. jejuni and 27 C. coli strains used for determining inclusivity and revealed 100% exclusivity toward 85 tested non-target species. Throughout the entire experiments, C. jejuni and C. coli strains were 100% distinguishable by melting curves of cdtC and gyrA LAMP products. After 24-h enrichment, the rplD LAMP assay reliably detected initial inoculation levels of 10–100 CFU/g in artificially contaminated minced meat. Investigation of naturally contaminated meat samples revealed a diagnostic accuracy of 95% toward real-time PCR and 94.1% toward the standard culture method applying the 24-h incubation period. Diagnostic sensitivity and specificity, and positive and negative predictive values were 89.8, 100, 100, and 91.2%, respectively, when measured against real-time PCR, and 89.6, 98.1, 97.7, and 91.2%, respectively, when measured against the standard culture method. After 48-h enrichment, the detection limit of the rplD LAMP assay improved to initial inoculation levels of 1–10 CFU/g in artificially contaminated minced meat. Applying the 48-h incubation period on naturally contaminated meat samples resulted in 100% concordant results between rplD LAMP, real-time PCR, and the standard culture method. The established LAMP assay system was proved to be suitable for rapid meat sample screening. Furthermore, it constitutes a promising tool for investigating other Campylobacter sources and could therefore make a valuable contribution to protect consumers from foodborne illness.

scholarly journals Artificial neural network prediction of microbiological quality of beef minced meat processed for fast-food meals

2021 ◽  
Vol 854 (1) ◽  
pp. 012091
Author(s):  
Aleksandra Ranitovic ◽  
Lato Pezo ◽  
Olja Sovljanski ◽  
Ana Tomic ◽  
Dragoljub Cvetkovic ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Fast Food ◽  
Microbiological Quality ◽  
Good Prediction ◽  
Beef Meat ◽  
Microbiological Profile ◽  
Minced Beef ◽  
Meat Samples ◽  
Minced Meat

Abstract In this study, the microbiological quality of 72 minced beef meat samples collected during six months from a local butcher was defined after laboratory analysis and developing advanced mathematical models. This new simultaneous approach provided adequate precision for the prediction of the microbiological profile of minced beef meat as one of the easily spoiled products with a short shelf life. For the first time, an artificial network model was developed to predict the microbiological profile of beef minced meat in a fast-food restaurant according to meat and storage temperatures, butcher identification, and work shift. A concurrent statistical study of practical analysis and the developing mathematical models provided adequate precision for the prediction of the microbiological profile of minced beef meat. The developed ANN provided a good prediction of the microbiological profile of beef minced meat with an overall R2 of 0.867 during the training cycle.

scholarly journals Prevalence and Loads of Fecal Pollution Indicators and the Antibiotic Resistance Phenotypes of Escherichia coli in Raw Minced Beef in Lebanon

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1543 ◽  
Author(s):  
Issmat I. Kassem ◽  
Nivin A Nasser ◽  
Joanna Salibi
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Food Safety ◽  
Food Systems ◽  
Meat Products ◽  
Fecal Coliforms ◽  
E Coli ◽  
Beef Meat ◽  
Minced Beef ◽  
Meat Samples

Meat is an important source of high biological value proteins as well as many vitamins and minerals. In Lebanon, beef meats, including raw minced beef, are among the most consumed of the meat products. However, minced beef meat can also be an important source of foodborne illnesses. This is of a major concern, because food safety in Lebanon suffers from well-documented challenges. Consequently, the prevalence and loads of fecal coliforms and Escherichia coli were quantified to assess the microbiological acceptability of minced beef meat in Lebanon. Additionally, antibiotic resistance phenotypes of the E. coli were determined in response to concerns about the emergence of resistance in food matrices in Lebanon. A total of 50 meat samples and 120 E. coli isolates were analyzed. Results showed that 98% and 76% of meat samples harbored fecal coliforms and E. coli above the microbial acceptance level, respectively. All E. coli were resistant to at least one antibiotic, while 35% of the isolates were multidrug-resistant (MDR). The results suggest that Lebanon needs to (1) update food safety systems to track and reduce the levels of potential contamination in important foods and (2) implement programs to control the proliferation of antimicrobial resistance in food systems.

Using Histological Analysis to Detect Mincemeat Falsification

2020 ◽  
Keyword(s):  
Histological Analysis ◽  
Meat Products ◽  
Raw Material ◽  
Striated Muscles ◽  
Current Standard ◽  
Diaphragmatic Muscle ◽  
Morphological Differences ◽  
Meat Samples ◽  
Technological University ◽  
Minced Meat

The article considers the problem of the quality and falsification of semi-finished meat products in the Russian Federation. The studies carried out based on the Perm Agrarian and Technological University in 2019. Samples of artificially falsified minced meat controlled by intact ground beef used as material for research. Shredded liver, kidneys, lungs, udder, diaphragm are introduced into the test samples. The tests were carried out by the histological method, according to GOST 19496-2013. By using histological analysis of minced striated muscles obtained images striation characteristic of skeletal musculature. In the cytoplasm of individual myocytes, sarcocystis found that was quite high. Comparative analysis mincemeat with minced skeletal and diaphragmatic muscles revealed it hard to detect as falsification. However, it's possible given some morphological differences between skeletal and diaphragmatic muscle fibers. In the process of microscopy of minced meat samples, without falsified by-products, inclusions of the corresponding tissues are easily visualized. As a result, we can conclude that histological analysis is a reasonably reliable way to determine the composition of chopped meat products. Unfortunately, the current standard is the mandatory histological identification of semi-finished products only if there is a disagreement on the structure of the raw material. That is, the problem of falsification lies not only in the dishonesty of producers but also in the presence of regulatory requirements governing the requirements for meat and meat products.

Survey of aflatoxin B 1 and ochratoxin A occurrence in traditional meat products coming from Croatian households and markets

Food Control ◽  
2015 ◽  
Vol 52 ◽  
pp. 71-77 ◽  
Author(s):  
Jelka Pleadin ◽  
Mladenka Malenica Staver ◽  
Nada Vahčić ◽  
Dragan Kovačević ◽  
Salvatore Milone ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Meat Products ◽  
Aflatoxin B

scholarly journals Detection of species substitution in raw, cooked, and processed meats utilizing multiplex-PCR assay

2021 ◽  
Vol 26 (3) ◽  
pp. 128
Author(s):  
Muhammad Cahyadi ◽  
Nur Aini Dyah Fauzıah ◽  
Imam Tubagus Suwarto ◽  
Waraporn Boonsupthip
Keyword(s):  
Multiplex Pcr ◽  
Cytochrome B ◽  
Meat Products ◽  
Cytochrome B Gene ◽  
Processed Meat ◽  
Pcr Assay ◽  
Processed Meats ◽  
Multiplex Pcr Assay ◽  
Species Substitution ◽  
Meat Samples

The rise of beef consumption in Indonesia opens an opportunity for “rogue” suppliers to mix beef with other meat species that are relatively cheaper, such as pork, chicken, etc. The aim of this study was to identify pig and chicken meat in raw, cooked, and processed meat products using multiplex-PCR of mitochondrial DNA Cytochrome b gene, which is maternally inherited and widely used for forensic studies. A total of 90 samples-33 raw meats, 33 cooked meats, and 24 meatballs-were used in this study. Each sample was extracted to obtain the DNA genome and this was then amplified using multiplex-PCR. The PCR products were visualized using 2% agarose gel electrophoresis. The results showed that species contained in raw, cooked, and processed meat samples could be identified as indicated by DNA bands at 398, 274, 227, and 157 bp for pig, cattle, chicken, and goat species respectively. This study concluded that species substitution in raw, cooked, and processed meats could be detected using the Cytochrome b gene as a genetic marker through multiplex-PCR assay.

scholarly journals PENGOLAHAN NUGGET KIJING (Pseudodon vandenbushianus) DENGAN KONSENTRASI DAGING KIJING DAN LABU KUNING (Cucurbita moschara)

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Radikal ◽  
Resie Janika
Keyword(s):  
Economic Value ◽  
Meat Products ◽  
Filler Material ◽  
Processed Meat ◽  
Organoleptic Test ◽  
A Value ◽  
Minced Meat ◽  
Organoleptic Parameters

Nugget is a processed meat products made from minced meat that is printed in the form of rectangular pieces and coated with seasoned flour. Gravestone processing into nuggets will increase the economic value gravestone. With the addition of meat gravestone and pumpkins as a filler material will affect whether or not the quality of the resulting nuggets. A research on the processing nuggets gravestone (Pseudodon vandenbushianus) with concentration gravestone meat and pumpkin (Curcurbita moschara).The treatment in this study, namely the concentration of gravestones and pumpkin meat (225 g: 50 gr, 200 gr: 75 g, and 175 g: 100 gr). The analysis in this study include organoleptic parameters (color, flavor, aroma and texture).The results of organoleptic test for color, aroma and texture nuggets gravestone gravestones by treatment with meat and pumpkin on a significant level of 5% showed no bedanyata, while based on the parameters of taste showed significant differences in which panelists preferred the treatment with concentrations gravestone meat and pumpkin 225 gr : 50 ounces with a value of 3.95 (like).Keywords: Nugget, Kijing, Yellow Pumpkin

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