دراسة مقارنة لعزلات بكتريا Staphylococcus aureus المعزولة من مياه النهر ومن حالات سريرية == A Comparative Study of Staphylosossus Aureus Bacteria Isolated From River Water And From Clinical Cases
Author name:
بنين مدلول امانة الزيادي
Supervisor name:
علي عبد رحيم الناشي
General topic:
Biology
Specific topic:
Microbiology - Bacteria
Degree:
Higher Diploma
University:
University of Al-Qadisiyah - Faculty Of Education - Department Of Biology
Language:
Arabic
University location:
Qadisiyah
First pages:
24T2959 - p.pdf
Abstract:
شملت الدراسة جمع 120 عينة اخذت من مصدرين مختلفين, 60 عينة منها جمعت من بيئة مائية هي نهر الديوانية, بينما كانت 60 عينة سريرية جمعت من الاشخاص الراقدين والمراجعين لمستشفى الديوانية ومن الاصابات الجلدية المختلفة التي شملت الدمامل, الحصف, التقشر الجلدي, الخر | The study included assemble 120 samples which had been taken from two different sources, 60 samples collected from An aqueous environment which is Al diwaniya river, where the rest 60 samples have been collected from those people who were admitted to the Al diwaniya hospital and from of different ages from male and female. Where the environment examples collected from different places of riverbed Al diwaniya. The duration of collection samples has lasted for 3 months, started One handrad isolated had been diagnosed that proved its belong to a bacteria Staphylococcus aureus, 50 isolated where taken from environment isolate and the other 50 taken from clinical isolate depending on the diagnostic methods which included tests of farm, microscopic and biochemical, It was also confirm the diagnosis of bacterial using accurate diagnosis that uses device VITEK System tested sensitivity of bacteria isolate of S. aureus, against 12 selected antibiotic, environment and clinical cases has shown resistance and sensitivity of different varied by source isolate, the nature of the antibiotic and the resistance and sensitivity have been determined by measuring diameters of areas inhibition around tablets of antibiotics it used.All the clinical isolates showed a complete resistance for the antibiotic Lincomycin with 100% percentage, where it's resisted Pnicillin G with 92%, Nalidixic acid with 42%, while the highest resistance of environment isolates was 97% for Lincomycin. The clinical isolates showed a sensitively against the two antibiotics which are Cefamandol and Cephalothin, where their percentages reached 98% and 89%, respectively. Where the percentage of environment isolates reached for the same antibiotics 100% and 97% respectively. In general, the clinical isolates were more resisted for the antibiotics than environment isolates in overall rate.differed values of minimum inhibitory concentrationsmic MIC and the minimum bactericidal concentration MBC among each other with variation of clinical isolates from side and differed with environment isolates from another side while the values differed with environment and clinical isolates from third side, where the highest value reached of MIC against Polymyxin B is (20 - 120) and (100 - 240) mg/ml for environment and clinical isolates respectively, while the highest value of MIC that also was against Polymyxin B reached (40 - 140) and (130 - 250) mg/ml for environment and clinical isolates respectively. Where the value of MIC against Cephalothin reached (0.01 - 0.6) and (0.8 - 2.0) mg/ml for environment and clinical isolates respectively. Finally, the highest value of MBC also was against Cephalothin reached (0.08 - 0.9) and (0.9 - 3.0) mg/ml respectively. In general, the bactericidal and inhibitory concentrations of the clinical isolates are higher concentrations from those bactericidal and inhibitory concentrations for environment isolates.I studied the virulence factors that come from strains of S. aureus bacteria environment and clinical which included Capsula, enzymes of Coagulase that are associated and free, , Lipase, Hyaloronidase and B - Lactamase in addition to Haemolysin clinical isolates and Leucocidin and all the environment isolates are the highest percenage in the ability to form and possess virulence factors compared with environment isolates, where the highest percentage to produce virulence factors is belongs to the Haemolysin which reached 94% percentage in the clinical isolates where in the environment isolates reached 64% percentage followed by Leucocidin that reached 84% percentage in the clinical samples and 40% percentage in the In environmental samples.Also the percentage of blood Coagulation enzyme the associated and free is the highest percentage in the clinical isolates which reached percentage 42% and 38% for the associated and free respectively, where the percentage in environment reached 20% and 36% respectively and the virulence factors was the least presence in the environmental and clinical isolates is the portfolio that reached percentage of presence 22% and 12% respectively.
