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Molecular characterization and detection of enterotoxins, methicillin resistance genes and antimicrobial resistance of Staphylococcus aureus from fish and ground beef

100%
Arslan S., Ozdemir F.
Polish Journal of Veterinary Sciences
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2017
|
tom 20
|
nr 1
A total of 120 samples including 40 freshwaterfish(Oncorhynchus mykiss), 40 seawater fish (Sparus aurata) and 40 ground beef samples were examined for the presence of Staphylococcus aureus. The isolates were identified using biochemical tests and a PCR for the species-specific fragment (Sa442) and thermonuclease gene (nucA). The presence of staphylococcal enterotoxin genes (sea, seb, sec, sed and see), toxin genes (eta, etb, tsst), methicillin resistance gene (mecA) and some phenotypic virulence factors was also tested. Genotypic characterization of the isolates was analyzed by PCR-RFLP of the coa gene. Overall, 36 (30%) meat samples were contaminated with S. aureus. Of the 36 isolates, 3 (8.3%) were found to be positive for enterotoxin genes. Only 1 isolate (5.9%) from ground beef had the sea gene. In addition, 1 (12.5%) of the freshwater fish and 1 (9.1%) of the seawater fish carried both the sea and sed genes. The presence of seb, sec, see, eta, etb and tsst was not detected among the isolates of S. aureus. The amplified coa gene revealed five different clusters. Seven and six distinct RFLP patterns were obtained with AluI and HaeIII digestion, respectively. All isolates were found to be positive for slime, hemolytic and DNase activity while 41.7% of them were beta-lactamase positive. The presence of methicillin resistance was neither detected by PCR nor the disk diffusion method. A total of 94.4% of the isolates were resistant to at least one antimicrobial while 44.4% of them were resistant to at least two or more antimicrobials.
2

Prevalence of Escherichia coli in retail poultry meat, ground beef and beef

100%
Eyi A., Arslan S.
Medycyna Weterynaryjna
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2012
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tom 68
|
nr 04
The aim of the study was to determine the prevalence and the level of E. coli contamination in retail poultry meat, ground beef and beef, and to evaluate the compliance of retail meat and meat preparations to requirements of the Turkish Food Codex and health risks for consumers. A total of 168 retail meat samples were examined for the prevalence and counts of Escherichia coli. Determination of the level of contamination of E. coli was performed using Lauryl Sulphate Tryptose (LST) broth with 4-methylumbelliferyl-β-D-glucuronide (MUG) according to three tubes with the Most Probable Number (MPN) method. Out of the total 168 samples tested, including poultry meat, ground beef and beef (each 56 samples), 90 (53.6%) were contaminated with E. coli. Overall, E. coli was detected in 49 (87.5%) of the poultry meat samples, 27 (48.2%) of the ground beef and 14 (25%) of the beef samples. The contamination level of all retail meats with E. coli was 1.9 × 10³ MPN/g. Average counts of E. coli in each group meat were 3.7 × 103 MPN/g in poultry meats, 1.4 × 10³ MPN/g in ground beef, and 6.4 × 10² MPN/g in beef samples. E. coli counts in all of the contaminated meats exceeded the established values in the microbiological criteria for retail meats consulted. The results have established retail meats represent hazards to human health and can be a threat to public health. On account of this, it is necessary that the consumers adopt the basic instructions regarding good hygienic practices, good cooking of meat, adequate storage temperature and cross-contamination.
3

Evaluating adult cor triatriatum with total anomalous pulmonary venous connections by multidetector computed tomography angiography

61%
Kantarci M., Yuce I., Yalcin A., Arslan S., Bozkurt M., Gundogdu F.
Folia Morphologica
|
2011
|
tom 70
|
nr 4
A 19-year-old female patient was admitted to our hospital with dyspnea, chest pain, and shortness of breath. A chest radiograph showed mild cardiomegaly. Echocardiography revealed an extra chamber in the heart. To evaluate this abnormality, ECG-gated 16-detector-row computed tomography angiography was performed. Multidetector computed tomography (MDCT), showing cor triatriatum with total anomalous pulmonary venous connections (TAPVC), clearly revealed cardiac and vascular anatomy. ECG-gated cardiac MDCT is a useful tool for detection and characterisation of cor triatriatum and related anomalies. (Folia Morphol 2011; 70, 4: 312–314)
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