scholarly journals Characterization of Virulence Gene of E.coli and Staphylococcus aureus Isolated From Meat Products

2019 ◽  
Vol 1 (1) ◽  
pp. 147-155
Author(s):  
Esraa El Alkamy ◽  
Zakaria Elbayoumi ◽  
Aml Eid
1972 ◽  
Vol 35 (9) ◽  
pp. 514-523 ◽  
Author(s):  
Han's Riemann ◽  
W. H. Lee ◽  
C. Genigeorgis

Clostridium botulinum and Staphylococcus aureus are naturally occurring contaminants in semi-preserved meat products. They can be inhibited by (a) storage below 3 C, (b) 10% sodium chloride (brine concentration), (c) pH values below 4.5, or (d) proper combinations of these factors. However, most meat products do not have the pH values and brine concentrations required to completely inhibit C. botulinum and S. aureus and there is always a risk of temperature abuse. Improved safety can be achieved by adding 1% or more glucose to the product. The glucose will, in the event of temperature abuse, generally be fermented to lactic acid by the indigenous microflora in the product. As a result, the pH value drops to a level at which the brine concentration is sufficient to inhibit C. botulinum and S. aureus. A better approach to safety is to add, together with glucose, a radiation-killed preparation of lactic acid bacteria, e.g., Pediococcus cerevisiae. Such preparations cause a rapid decline in pH only when the product is exposed to a high temperature, and they are stable during storage of meat products. Addition of irradiated lactic acid bacteria to meat products has not yet been officially approved. Another way to improve the safety of semi-preserved meat is to add sufficient glucono-delta-lactone to reduce the initial pH of the product to a level at which the salt concentration is inhibitory. Use of larger amounts of glucono-delta-lactone may result in flavor and color problems even when the meat product is kept at refrigeration temperatures.


2003 ◽  
Vol 56 (12) ◽  
pp. 1045-1052 ◽  
Author(s):  
TAKAFUMI WATANABE ◽  
YOSHIKI HASHIMOTO ◽  
KANEYOSHI YAMAMOTO ◽  
KIYO HIRAO ◽  
AKIRA ISHIHAMA ◽  
...  

1999 ◽  
Vol 33 (2) ◽  
pp. 307-316 ◽  
Author(s):  
Tammy M. Rechtin ◽  
Allison F. Gillaspy ◽  
Maria A. Schumacher ◽  
Richard G. Brennan ◽  
Mark S. Smeltzer ◽  
...  

2021 ◽  
Vol 77 (06) ◽  
pp. 6533-2021
Author(s):  
REYHAN IRKIN ◽  
BERKAY BOZKURT ◽  
GULENDAM TUMEN

From a public health point of view meat products contain high pathogenic risk factors. This is because they can be contaminated with Salmonella spp. and Staphylococcus aureus microorganisms, and, more importantly, antibiotic resistance has been reported in these microorganisms at an increasing frequency. To examine the presence of Salmonella spp. and Staphylococcus aureus in samples of raw and semi-cooked (chicken doner, meat doner, chicken, beef, and lamb products) meat from markets of Izmir and Balikesir, Turkey were analysed. The presence of microorganisms in the samples was determined by Real-Time PCR method using Salmonella spp. and S. aureus specific primers. Following Real-Time PCR, microorganisms were isolated by selective culture methods and biochemical tests from the positive meat samples and tested for their antibiotic susceptibility using the Kirby-Bauer Disk Diffusion Method. The antibiotic disc diffusion method showed that S. aureus was resistant to penicillin G, oxytetracycline, sulfamethoxazole, tetracycline, erythromycin, and ampicillin, whereas Salmonella spp. was resistant to penicillin G, sulfamethoxazole, erythromycin, and ampicillin. As these products are consumed frequently, their contamination with S. aureus (≥ 5 × 103 cfu/g) and Salmonella spp. can be a risk factor for food poisoning. The contamination of meat products’ with S. aureus and Salmonella spp. can be a risk factor for public health and the antibiotics to be preferred in illness treatment are of critical importance.


2020 ◽  
Vol 25 (2) ◽  
pp. 38
Author(s):  
Lubna W. Mohammed ◽  
Ahmed A. Irzoqi

This research includes synthesis and characterization of some of Cd(II) complexes with (3-hydrazonoindolin-2-one)(HZI) ligand and amino pyridine ligands.    Treatment equialmolar of CdCl2.2.5H2O and (HZI) ligand with two moles of n-aminopyridine (n-amp) (n:2,3,4) ligands afford a tetrahedral complexes of the type [Cd(HZI)(n-amp)2]Cl2, where (HZI) ligand behaves as a bidentate chelating fashion through the N atom of azomethine group and  O atom of carbonyl group. Whereas the (n-amp)(n: 2,3,4) was bonded monodentate mode through the N atom of heterocyclic ring. The prepared complexes have been characterized by molar conductivity, elemental analysis, infrared spectra and 1H-NMR and 13C-NMR spectra. Also the evaluation of biological activity of the prepared complexes against two types of gram positive bacteria (Staphylococcus Epidermidis and Staphylococcus aureus) and (Citrobacer Freundii) and gram negative, all prepared complexes showed activity against Staphylococcus aureus more than  amikacin, while the [Cd(HZI)(3-amp)2]Cl2 complex showed high activity against Staphylococcus Epidermidis and Citrobacter freundii more than another prepared complexes   http://dx.doi.org/10.25130/tjps.25.2020.028


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