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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Nalidixic acid"”.
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Surface Area Mapping and Rinse Procedures of Raw Produce to Determine Effectiveness of Pathogen Removal
… inoculated with a five-strain cocktail of nalidixic acid resistant Salmonella spp. Samples were subjected to one of six different treatments using different combinations of agitation methods (manual shaking or ultrasound), diluent temperatures (25°C and 40°C), and agitation times (60 and …
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Influence of high pressure processing on populations of Salmonella enterica in fresh green-mature tomato fruits and subsequent ripening
… in broth and on green mature tomato fruits. Nalidixic acid resistant (to 50 ppm) cultures of Salmonella enterica ser. Newport and Salmonella enterica ser. Braenderup were suspended in tryptic soy broth to a concentration of approximately 8 log CFU/ml and subjected to 350, 450, and 550 MPa for …
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Efficacy of Detergent Rinse Agents to Remove Salmonella and Shigella spp. from the Surface of Fresh Produce
… dip inoculated in a 6-6.5 LOG CFU/ml cocktail of nalidixic acid resistant organisms. After drying, produce were rinsed with either 0.1 % sodium lauryl sulfate (SLS), 0.1% Tween 80, or water at different temperatures. Rinse solutions were plated onto Tryptic Soy agar supplemented with 50-ppm …
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Investigations into quinolone and fluoroquinolone resistance in Salmonella enterica
… treatment failures with these drugs in nalidixic acid-resistant isolates have been increasing. To determine the levels of fluoroquinolone resistance in Scotland from 1990-2000, this study examined a collection of 180 isolates of Salmonella enterica isolated from human, veterinary and …
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A study of the Project for American Studies in the Secondary Schools and its effect on curricular change
… of spermidine.7. Both novobiocin and nalidixic acid have an inhibitory effect on tumor growth, but the effects are decreased by concurrent administration of spermidine. Reversal of the nalidixic acid effect on growth by addition of spermidine is more pronounced than reversal of the …
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Efficacy of selected chemicals and electron beam irradiation for destroying Escherichia coli 0157:H7 and Salmonella on cantaloupe skin
<p>This study evaluated the efficacy of citric acid (1, 2, or 3% CA) alone or combined with hydrogen peroxide (5% HP), sodium lauryl sulfate (1% SLS), and irradiation for destroying Escherichia coli 0157:H7 and Salmonella spp. on the outer rind surface of cantaloupe. Cantaloupe rinds were cut into …
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High Hydrostatic Pressure Processing Reduces Salmonella enterica from Diced and Whole Tomatoes
… 8 log CFU/ml of one of the four serovars (nalidixic acid resistant) were packaged in sterile stomacher bags and subjected to one of three different pressures (350, 450, or 550 MPa) for 120s. Samples were enumerated by surface plating onto tryptic soy agar supplemented with 50 ppm nalidixic …
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Antibacterial Activity of Hydrogen Peroxide Against Escherichia Coli O157:H7 and Salmonella Spp. in Fruit Juices, Both Alone and in Combination With Organic Acids
… with ~ 6.4 log CFU/ml of a five strain, acid adapted, nalidixic acid resistant E. coli O157:H7 cocktail. Orange juice was inoculated with a comparable Salmonella spp. cocktail. In the first study, 0.017% and 0.012% H₂O₂ was added in combination with 0.1% and 0.3% of the dominant organic …
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Pathogenicity Genes of Pseudomonas Syringae Pv. Tabaci Br2
… mutants wre prototrophs, resistant to kanamycin, nalidixic acid, and streptomycin, but sensitive to chloramphenicol. Eight of 2,686 Tn5 mutants showed no symptoms and ten showed reduced symptoms when inoculated onto detached tobacco leaves of Nicotiana tabacum cv. Havana 38, but all showed typical …
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ΜΙΚΡΟΒΙΟΛΟΓΙΚΟΣ ΕΛΕΓΧΟΣ ΑΝΤΙΜΙΚΡΟΒΙΑΚΩΝ ΠΑΡΑΓΟΝΤΩΝ
… CEFTAZADIME 88%, THIENAMYCIN 82%, AZTREONAM 81%, NALIDIXIC ACID 51%, CEFOTAXIM 41%, CARBENICILLIN 36%, GENTAMICIN 23% AND CLOROMPHENICOL 0%. IN THE SECOND PART OF THIS STUDY (ANTISEPTICS), WE EVALUATED THE ANTIBACTERIAL ACTIVITY OF 12 CHEMICAL COMPOUNDS: IRGASAN DP300, O-PHENYLPHENOL, (IRGASAN - …
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Phenotypic and genotypic characterization of salmonella isolates from chickens and humans in South Sudan.
… co-trimoxazole, chloramphenicol, streptomycin, nalidixic acid, cefotaxime and gentamicin. However, some isolates showed resistance to ciprofloxacin 1 (9.1%), tetracycline 1 (9.1%), and ampicillin 2 (18.2%). All the chicken isolates were susceptible to chloramphenicol, cefotaxime, streptomycin, …
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Indagine sulla presenza di Helicobacter pullorum in allevamenti avicoli italiani
… with different MIC values for ciprofloxacin and nalidixic acid, were compared. According to the PCR and PCR-RFLP results, 306 out of 366 animals examined were positive for H. pullorum (83,6%) and 96,1% of farms resulted infected. All positive samples showed a high number of colonies (>50) …
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A taxonomic study of the genus Campylobacter
… C. coli. Growth at 25 and 42°C, sensitivity to nalidixic acid and cephalothin, growth in semisolid medium containing 1% glycine, 1% oxgall or 3.5% NaCl, growth in a semisolid minimal medium (MM), anaerobic growth in 0.1% trimethylamine-N-oxide (TMAO), H₂S production in Sulfide-Indole-Motility …
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Food safety knowledge, attitude and practices of food handlers at the university teaching hospital in Lusaka.
… in both human and animal medicine especially to nalidixic acid and chloramphenicol. The study confirmedthe presence of Staphylococcusaureus in correctional kitchen environments. The isolatedStaphylococcusaureus was multidrug resistant thereby posing a risk to inmates who are lodged in the two …
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Food safety knowledge, attitude and practices of food handlers at the university teaching hospital in Lusaka.
… in both human and animal medicine especially to nalidixic acid and chloramphenicol. The study confirmedthe presence of Staphylococcusaureus in correctional kitchen environments. The isolatedStaphylococcusaureus was multidrug resistant thereby posing a risk to inmates who are lodged in the two …
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The epidemiology & molecular basis of fluoroquinolone resistant & susceptible isolates of Campylobacter coli
… included in the study: 26 were susceptible to nalidixic acid and ciprofloxacin and 35 were resistant to these antibiotics. Fifty-five strains were obtained from pigs on farm A, while 6 strains were obtained from pigs on farm B, the source farm of pigs to farm A. Serotyping and flaA typing were …
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Assessing bacteriological quality of fresh black soldier fly larvae.
… to gentamicin, tetracycline, chloramphenicol, nalidixic acid, cefotaxime, cotrimoxazole, ciprofloxacin, streptomycin, and ampicillin. Furthermore, three out of 19 (3/19, 16%) E. coli isolates tested positive for blaTEM and blaCTX-M drug resistance genes that encode class A extended spectrum …
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Common causes of bacteraemia among sickle cell anaemia children with fever: evidence from a cross section survey.
… to Cefotaxime and Norfloxacin, Penicillin and Nalidixic acid. Another 5.5% of the patients had clinical, laboratory and radiological evidence strongly suggestive of bacterial infection. Conclusion:The proportion of bacterial infections among sickle cell anaemia with fever in this study was …
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Assessing bacteriological quality of fresh black soldier fly larvae.
… to gentamicin, tetracycline, chloramphenicol, nalidixic acid, cefotaxime, cotrimoxazole, ciprofloxacin, streptomycin, and ampicillin. Furthermore, three out of 19 (3/19, 16%) E. coli isolates tested positive for blaTEM and blaCTX-M drug resistance genes that encode class A extended spectrum …
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Understanding the Genetics and Evolution of Antimicrobial Resistance in Escherichia Coli
… identified 50 spontaneous resistance mutants on nalidixic acid, ciprofloxacin, and levofloxacin, with mutations in regions ofgyrA,gyrB, andmarR, which are known contributors of resistance in quinolones. Resistant isolates had increased resistance levels, widespread cross-resistance to other …
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