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Article
Effect of some plant extracts on some pathogenic bacteria
أثر بعض المستخلصات النباتية فى بعض البكتريا المرضية

Author: M.S.R.Al-Juboory محمود شاكر رشيد
Journal: Journal of Research Diyala humanity مجلة ديالى للبحوث الانسانية ISSN: 1998104x Year: 2008 Issue: 31 Pages: 86-92
Publisher: Diyala University جامعة ديالى

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Abstract

Theis study was concerned with the antimicrobial effect in vitro of aqueous and ethanolic extracts of three species of plants (Chlorocyperus rotundus L., Dianthus chinensis L.and Glycyrrhiza glabra L.)were assayed against four species of pathogenic bacteria (Escherichia coli ,Proteus mirabilis, Staphylococcus aureus and Streptococcus pyogenes ).All isolates were sensitive to aqueous and ethanolic extracts of( Dianthus chinensis L.)singly and all combination except aqueous extracts of (Chlorocyperus rotundus L.,Dianthus chinensis L.and Glycyrrhiza glabra L.)did not inhabit any of the test organisms.The aqueous and ethanolic extracts of (Chlorocyperus rotundus L. singly did not inhibit of gram-negative or ganism , so the aqueous and ethanolic extracts of(Glycyrrhiza glabra L.) singly did not inhibit gram-positive organism .The highest inhibition zone of 16 mm was observed with a combination of extracts on Streptococcus pyogenes.

درس أثرالمستخلصات المائية و الايثانولية لثلاثة انواع نباتية(السعد Chlorocyperus rotundus L. ، القرنفلDianthus chinesis L. والسوس Glycyrrhiza glabra L .) في نمو اربعةعزلات من البكترية المرضية (E. coli ,Proteus mirabilis ,Staphylococcus aureus ,Streptococcus pyogenes ) حيث اظهرت النتائج حساسية جميع العزلات البكتيرية لمستخلصات نبات القرنفل وكذلك لمزيج مستخلصات جميع الانواع النباتية عدا المستخلص المائي لها حيث لم يظهر أي تأثير على الانواع البكتيرية. ان المستخلص المائي ومستخلص الايثانول لنبات السعد لم يظهر أي أثر تثبيطي للبكتريا السالبة لصبغة كرام وكذلك مستخلصات نبات السوس لم تظهر أي أثر تثبيطي على البكتريا الموجبة لصبغة كرام وان اعلى تثبيط ( 16 mm) لوحظ لمستخلص الايثانول لنباتات القرنفل والسوس في بكتريا Streptococcus pyogenes)) .


Article
Identification and Antimicrobial Susceptibility of Bacterial Isolates from Odontogenic Abscesses

Authors: Dr. Haween T. Hassan.*** د. هاوين حسان --- Dr. Lukmman F. Omar.** د. لقمان عمر --- Dr. Ahmad Hayder Abdulla.* د. احمد حيدر
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 4 Pages: 422-428
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Objective: The purpose of the study was to identify the bacterial composition of the microbiota from odontogenic abscesses and their antimicrobial susceptibilities.Study Design: An aspirate of pus from 37 patients with odontogenic abscesses was obtained by needle aspiration and processed aerobically and under anaerobic conditions. Bacteria were isolated and identified by standard Laboratory methods. Then antimicrobial susceptibility of isolated bacteria was determined by using disc diffusion method.Results: Out of 37 aspirates, 100% yielded positive culture, 34 aspirates contained a mix of microorganisms. A total of 90 strains of bacteria were isolated.Out of 90 strains, 63 strains were anaerobes and 27 strains were aerobes and facultative anaerobes. The mean number of strains per sample was 2.4, two samples were purely anaerobes, 9 samples were mixed anaerobes, 2 samples were purely facultative anaerobes, no purely aerobic, 17 had mixed growth of anaerobes and facultative anaerobes, and 7 samples had mixed growth of aerobes and facultative anaerobic bacteria. Out of 90 isolates, 42 (46.67%) were Gram-positive cocci, 25 (27.78%) were Gram-positive bacilli, 21 (23.33%) were Gram-negative bacilli, and 2 (2.22%) were Candida albicans. The genera of bacteria most frequently isolated were viridans group streptococci, Peptostreptococcus spp., Eubacterium spp., and Prevotella spp. Invitro antibiotic sensitivity of isolated microorganisms were tested for Penicillin, Amoxillin, Ampicillin, Amoxicillin/Clavulanic acid, Erythromycin, and Metronidazole by disc diffusion method. All isolates were sensitive to Amoxillin+ clavulanic acid: 27/27(100%), followed by Ampicillin: 24/27(88.89%), Amoxillin: 23/27(85.19%), Penicillin: 22/27(81.48%), Erythromycin: 12/27(44.44%), and metronidazole: 10/27(37.04%).Conclusions: The present results confirm the existence of mixed infection with predominance of anaerobic and facultative anaerobic bacteria in odontogenic abscesses. Penicillin still possesses antimicrobial activity against the majority of bacteria isolated from odontogenic infections. However, if penicillin therapy has failed to be effective, the combination of penicillin with ampicillin or amoxillin with clavulanic acid is recommended.

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