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Hascelik G, Soyletir G, Gulay Z, Sancak B, Yaman A, Gurler N, Aydemir SS, Bayramoglu G, Aydin F, Cekin Y, Birinci A, Ozakin C, Akpolat N, Ozhak Baysan B, Gultekin M, Zer Y, Sanal L, Arabaci C, Ay Altintop Y, Ozturk C, Ceyhan M. Serotype distribution of Streptococcus pneumoniae and pneumococcal vaccine coverage in adults in Turkey between 2015 and 2018. Ann Med 2023; 55:266-275. [PMID: 36579976 PMCID: PMC9809394 DOI: 10.1080/07853890.2022.2160877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE To evaluate the serotype distribution and antibiotic resistance in pneumococcal infections in adults and to provide a perspective regarding serotype coverage of both current and future pneumococcal vaccines. PATIENTS AND METHODS This passive surveillance study was conducted with the Streptococcus pneumoniae strains isolated from the specimens of patients with pneumonia (materials isolated from bronchoalveolar lavage), bacteraemia, meningitis, pleuritis and peritonitis between 2015 and 2018. Serogrouping and serotyping were performed by latex particle agglutination and by conventional Quellung reaction using commercial type-specific antisera, respectively. The strains were analysed for penicillin, cefotaxime, erythromycin and moxifloxacin susceptibilities by E-test. RESULTS In the whole study group (410 samples from adults aged ≥18 years), the most frequent serotypes were 3 (14.1%), 19 F (12%) and 1 (9.3%). The vaccine coverage for PCV13, PCV15, PCV20 and PPV23 was 63.9%, 66.6%, 74.1% and 75.9%, respectively, in all isolates. Penicillin non-susceptibility in invasive pneumococcal disease (IPD) was 70.8% and 57.1% in the patients aged <65 and ≥65 years, respectively. About 21.1% and 4.3% of the patients with and without IPD had cefotaxime resistance. Non-susceptibility to erythromycin and moxifloxacin was 38.2% and 1.2%, respectively. CONCLUSIONS The results revealed that novel PCV vaccines may provide improved coverage as compared with the currently available vaccine, PCV13. The significant antibiotic resistance rates imply the need to extend the serotype coverage of the vaccines. Continuing the surveillance in pneumococcal diseases is critical to explore the serotype distribution and incidence changes of IPD cases in the population and to inform policy makers to make necessary improvements in the national immunization programmes.Key messagesThis multicentre study demonstrated the most recent serotype distribution and antibiotic resistance in adult population in Turkey.Shifting from PCV13 to novel conjugated vaccines will significantly increase the coverage.Continuing the surveillance in pneumococcal diseases is critical to explore the serotype distribution changes and the incidence of cases with invasive pneumococcal disease in the population.
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Affiliation(s)
- Gulsen Hascelik
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Guner Soyletir
- Department of Medical Microbiology, Marmara University, Pendik Training and Research Hospital, Istanbul, Turkey
| | - Zeynep Gulay
- Department of Medical Microbiology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Banu Sancak
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Akgun Yaman
- Department of Medical Microbiology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - Nezahat Gurler
- Department of Microbiology and Clinical Microbiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Sabire Sohret Aydemir
- Department of Medical Microbiology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Gulcin Bayramoglu
- Department of Medical Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Faruk Aydin
- Department of Medical Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Yesim Cekin
- Department of Medical Microbiology, Antalya Training and Research Hospital, Antalya, Turkey
| | - Asuman Birinci
- Department of Medical Microbiology, Faculty of Medicine, Samsun Ondokuz Mayıs University, Samsun, Turkey
| | - Cuneyt Ozakin
- Department of Medical Microbiology, Faculty of Medicine, Bursa Uludag University, Bursa, Turkey
| | - Nezahat Akpolat
- Department of Medical Microbiology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
| | - Betil Ozhak Baysan
- Department of Medical Microbiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Meral Gultekin
- Department of Medical Microbiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Yasemin Zer
- Department of Microbiology, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Laser Sanal
- Department of Clinical Microbiology, Ankara Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey
| | - Cigdem Arabaci
- Department of Microbiology and Clinical Microbiology, Istanbul Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - Yasemin Ay Altintop
- Department of Medical Microbiology, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - Candan Ozturk
- Department of Medical Microbiology, Faculty of Medicine, Mersin University, Mersin, Turkey
| | - Mehmet Ceyhan
- Department of Pediatric Infectious Diseases, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Ekinci B, Edgunlu TG, Bayramoglu G, Atay GU. Molecular investigation of staphylococcal cassette chromosome mec types and genotypic relations of methicillin-resistant staphylococci isolated from before and after hospital exposed students. Indian J Med Microbiol 2018; 36:257-264. [PMID: 30084421 DOI: 10.4103/ijmm.ijmm_17_256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Reservoir of methicillin resistance genes called staphylococcal cassette chromosome mec (SCCmec), plasmids and genomic characterisations of isolates have been widely investigated in epidemiologic research. However, the extent to which these organisms are transported by patients or hospital staff is not entirely clear. Aim This study aims to investigate the molecular relatedness and plasmid profiles of MR staphylococci isolated from nursing students before and after hospital training, to find out the possible source. Materials and Methods This study examined 39 methicillin-resistant (MR) staphylococci and 2 inducible clindamycin-resistant, methicillin-susceptible Staphylococcus aureus. Specimens were collected before and after 4 months of hospital training from the hands and nares of 75 nursing students. A polymerase chain reaction technique was used to confirm the existence of mecA gene and identify SCCmec types; total DNA was digested by SmaI endonuclease restriction to monitorise clonal relatedness by pulsed-field gel electrophoresis (PFGE); plasmid profiles were monitorised on agarose gel. Results All 39 isolates tested positive for mecA; SCCmec type III was observed most frequently. Interestingly, in one isolate of Staphylococcus epidermidis, four different types of SCCmec elements were observed. There were 23 different types of plasmids, whose sizes ranged from 1.4 to 46.0 kb. After PFGE dendogram analysis, two strains were classified as indistinguishable; six were closely related. Most of the isolates obtained after hospital training showed clonal similarity and seven had multiple SCCmec elements require further investigation for the possible mechanism. Conclusion Most of the isolates obtained after hospital training showed clonal similarity and seven had multiple SCCmec elements require further investigation for the possible mechanism.
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Affiliation(s)
- Bora Ekinci
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Mugla Sitki Kocman University, Mugla, Turkey
| | - Tuba Gokdogan Edgunlu
- Department of Medical Biology, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
| | - Gulcin Bayramoglu
- Department of Medical Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Gulsen Ulucam Atay
- Department of Medical Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Torumkuney D, Gur D, Soyletir G, Gurler N, Aktas Z, Sener B, Tunger A, Bayramoglu G, Koksal I, Yalcin AN, Tanriver Y, Morrissey I, Barker K. Results from the Survey of Antibiotic Resistance (SOAR) 2002-09 in Turkey. J Antimicrob Chemother 2016; 71 Suppl 1:i85-91. [PMID: 27048585 DOI: 10.1093/jac/dkw067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES To investigate changes in antibiotic susceptibility of Streptococcus pneumoniae and Haemophilus influenzae from the Survey of Antibiotic Resistance (SOAR) in community-acquired respiratory tract infections (CA-RTIs) between 2002 and 2009 in Turkey. METHODS Previously published SOAR data were used for this analysis. MICs were determined using Etest(®) gradient strips or disc diffusion. Susceptibility against a range of antimicrobial agents was assessed using CLSI breakpoints. RESULTS A total of 900 S. pneumoniae isolates were analysed: 2002-03 (n = 75), 2004-05 (n = 301) and 2007-09 (n = 524). Four antibiotics were tested consistently throughout and three showed a statistically significant decrease in susceptibility (P < 0.0001): penicillin (74.7% susceptible in 2002-03; 67.8% in 2004-05; and 47.2% in 2007-09); cefaclor (85.3% in 2002-03; 78.7% in 2004-05; and 53.5% in 2007-09) and clarithromycin (85.3% in 2002-03; 82.7% in 2004-05; and 61.9% in 2007-09). Susceptibility to amoxicillin/clavulanic acid did not significantly change (100% in 2002-03; 98.7% in 2004-05; and 97.7% in 2007-09). A total of 930 H. influenzae isolates were analysed: 2002-03 (n = 133), 2004-05 (n = 379) and 2007-09 (n = 418). Four antibiotics were also consistently tested: ampicillin, amoxicillin/clavulanic acid, clarithromycin and cefaclor. All showed >90% susceptibility, but only cefaclor susceptibility significantly reduced (P < 0.0001) over time (99.2% in 2002-03; 96.3% in 2004-05; and 90.4% in 2007-09). CONCLUSIONS In S. pneumoniae from Turkey, there has been a clear statistically significant reduction in susceptibility to key antibiotics since 2002, but not to amoxicillin/clavulanic acid (or amoxicillin). However, susceptibility in H. influenzae remained stable. Continued surveillance is required to monitor future changes in antibiotic susceptibility for CA-RTI bacteria.
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Affiliation(s)
- D Torumkuney
- GlaxoSmithKline, 980 Great West Road, Brentford, Middlesex TW8 9GS, UK
| | - D Gur
- Hacettepe University Medical Faculty, Department of Medical Microbiology, Ankara, Turkey
| | - G Soyletir
- Marmara University Medical Faculty, Department of Medical Microbiology, Istanbul, Turkey
| | - N Gurler
- Istanbul University, Istanbul Medical Faculty, Department of Medical Microbiology, Istanbul, Turkey
| | - Z Aktas
- Istanbul University, Istanbul Medical Faculty, Department of Medical Microbiology, Istanbul, Turkey
| | - B Sener
- Hacettepe University Medical Faculty, Department of Medical Microbiology, Ankara, Turkey
| | - A Tunger
- Ege University Medical Faculty, Department of Medical Microbiology, Izmir, Turkey
| | - G Bayramoglu
- Karadeniz Technical University Faculty of Medicine, Department of Infectious Diseases and Clinical Microbiology, Trabzon, Turkey
| | - I Koksal
- Karadeniz Technical University Faculty of Medicine, Department of Infectious Diseases and Clinical Microbiology, Trabzon, Turkey
| | - A N Yalcin
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Y Tanriver
- GlaxoSmithKline Turkey, Buyukdere Cad. 1. Levent Plaza, No. 173, B Blok, 34394 Istanbul, Turkey
| | - I Morrissey
- IHMA Europe Sàrl, 9A route de la Corniche, Epalinges 1066, Switzerland
| | - K Barker
- GlaxoSmithKline, 980 Great West Road, Brentford, Middlesex TW8 9GS, UK
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Ceyhan M, Ozsurekci Y, Gürler N, Öksüz L, Aydemir S, Ozkan S, Yuksekkaya S, Keser Emiroglu M, Gültekin M, Yaman A, Kiremitci A, Yanık K, Karli A, Ozcinar H, Aydin F, Bayramoglu G, Zer Y, Gulay Z, Gayyurhan ED, Gül M, Özakın C, Güdücüoğlu H, Perçin D, Akpolat N, Ozturk C, Camcıoğlu Y, Karadağ Öncel E, Çelik M, Şanal L, Uslu H. Serotype distribution of Streptococcus pneumoniae in children with invasive diseases in Turkey: 2008-2014. Hum Vaccin Immunother 2016; 12:308-13. [PMID: 26325175 DOI: 10.1080/21645515.2015.1078952] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Successful vaccination policies for protection from invasive pneumococcal diseases (IPD) dependent on determination of the exact serotype distribution in each country. We aimed to identify serotypes of pneumococcal strains causing IPD in children in Turkey and emphasize the change in the serotypes before and after vaccination with 7-valent pneumococcal conjugate vaccine (PCV-7) was included and PCV-13 was newly changed in Turkish National Immunization Program. Streptococcus pneumoniae strains were isolated at 22 different hospitals of Turkey, which provide healthcare services to approximately 65% of the Turkish population. Of the 335 diagnosed cases with S. pneumoniae over the whole period of 2008-2014, the most common vaccine serotypes were 19F (15.8%), 6B (5.9%), 14 (5.9%), and 3 (5.9%). During the first 5 y of age, which is the target population for vaccination, the potential serotype coverage ranged from 57.5 % to 36.8%, from 65.0% to 44.7%, and from 77.4% to 60.5% for PCV-7, PCV-10, and PCV-13 in 2008-2014, respectively. The ratio of non-vaccine serotypes was 27.2% in 2008-2010 whereas was 37.6% in 2011-2014 (p=0.045). S. penumoniae serotypes was less non-susceptible to penicillin as compared to our previous results (33.7 vs 16.5 %, p=0.001). The reduction of those serotype coverage in years may be attributed to increasing vaccinated children in Turkey and the increasing non-vaccine serotype may be explained by serotype replacement. Our ongoing IPD surveillance is a significant source of information for the decision-making processes on pneumococcal vaccination.
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Affiliation(s)
- Mehmet Ceyhan
- a Department of Pediatric Infectious Diseases ; Hacettepe University Faculty of Medicine ; Ankara , Turkey
| | - Yasemin Ozsurekci
- a Department of Pediatric Infectious Diseases ; Hacettepe University Faculty of Medicine ; Ankara , Turkey
| | - Nezahat Gürler
- b Department of Microbiology and Clinical Microbiology ; Istanbul University Faculty of Medicine ; Istanbul , Turkey
| | - Lütfiye Öksüz
- b Department of Microbiology and Clinical Microbiology ; Istanbul University Faculty of Medicine ; Istanbul , Turkey
| | - Sohret Aydemir
- c Department of Microbiology and Clinical Microbiology ; Ege University Faculty of Medicine ; Izmir , Turkey
| | - Sengul Ozkan
- d Microbiology Laboratory; Dr. Sami Ulus Children's Health and Diseases Training and Research Hospital ; Ankara , Turkey
| | - Serife Yuksekkaya
- e Microbiology; Konya Training and Research Hospital ; Konya , Turkey
| | - Melike Keser Emiroglu
- f Department of Pediatric Infectious Diseases ; Selçuk University Faculty of Medicine ; Konya , Turkey
| | - Meral Gültekin
- g Department of Medical Microbiology ; Akdeniz University Faculty of Medicine ; Antalya , Turkey
| | - Akgün Yaman
- h Department of Microbiology ; Çukurova University Faculty of Medicine ; Adana , Turkey
| | - Abdurrahman Kiremitci
- i Department of Microbiology , Osmangazi University Faculty of Medicine , Izmir , Turkey
| | - Keramettin Yanık
- j Department of Microbiology ; Ondokuz Mayıs University Faculty of Medicine ; Samsun , Turkey
| | - Arzu Karli
- j Department of Microbiology ; Ondokuz Mayıs University Faculty of Medicine ; Samsun , Turkey
| | - Hatice Ozcinar
- k Microbiology Laboratory; Sanliurfa Children's Hospital ; Sanliurfa , Turkey
| | - Faruk Aydin
- l Department of Medical Microbiology ; Karadeniz Technical University Faculty of Medicine ; Trabzon , Turkey
| | - Gulcin Bayramoglu
- l Department of Medical Microbiology ; Karadeniz Technical University Faculty of Medicine ; Trabzon , Turkey
| | - Yasemin Zer
- m Department of Microbiology ; Gaziantep University Faculty of Medicine ; Gaziantep , Turkey
| | - Zeynep Gulay
- n Department of Microbiology ; Dokuzeylül University Faculty of Medicine ; Izmir , Turkey
| | | | - Mustafa Gül
- p Department of Microbiology ; Sutcuimam University Faculty of Medicine ; Kahramanmaras , Turkey
| | - Cüneyt Özakın
- q Department of Medical Microbiology ; Uludağ University Faculty of Medicine ; Bursa , Turkey
| | - Hüseyin Güdücüoğlu
- r Department of Microbiology ; Yüzüncü Yıl University Faculty of Medicine Training Hospital ; Van , Turkey
| | - Duygu Perçin
- s Central Laboratory, Bacteriology; Erciyes University Faculty of Medicine ; Kayseri , Turkey
| | - Nezahat Akpolat
- t Department of Microbiology ; Dicle University Faculty of Medicine ; Diyarbakir , Turkey
| | - Candan Ozturk
- u Department of Medical Microbiology ; Mersin University Faculty of Medicine ; Mersin , Turkey
| | - Yıldız Camcıoğlu
- v Department of Pediatrics ; Istanbul University Cerrahpasa Faculty of Medicine ; Istanbul , Turkey
| | - Eda Karadağ Öncel
- a Department of Pediatric Infectious Diseases ; Hacettepe University Faculty of Medicine ; Ankara , Turkey
| | - Melda Çelik
- a Department of Pediatric Infectious Diseases ; Hacettepe University Faculty of Medicine ; Ankara , Turkey
| | - Laser Şanal
- w Microbiology Laboratory; Dr. Dogan Baran Hospital for Women's and Children's Diseases ; Niğde , Turkey
| | - Hakan Uslu
- x Department of Microbiology ; Ataturk University Faculty of Medicine ; Erzurum , Turkey
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Kavruk M, Celikbicak O, Ozalp VC, Borsa BA, Hernandez FJ, Bayramoglu G, Salih B, Arica MY. Antibiotic loaded nanocapsules functionalized with aptamer gates for targeted destruction of pathogens. Chem Commun (Camb) 2016; 51:8492-5. [PMID: 25891472 DOI: 10.1039/c5cc01869b] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this study, we designed aptamer-gated nanocapsules for the specific targeting of cargo to bacteria with controlled release of antibiotics based on aptamer-receptor interactions. Aptamer-gates caused a specific decrease in minimum inhibitory concentration (MIC) values of vancomycin for Staphylococcus aureus when mesoporous silica nanoparticles (MSNs) were used for bacteria-targeted delivery.
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Affiliation(s)
- M Kavruk
- Department of Biotechnology, Middle East Technical University, Turkey
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Abstract
Magnetic-silica core–shell nanoparticles were proposed as a fast purification strategy for recombinant enzymes and their subsequent usability in catalysis reactions. A proof-of-concept study with Taq polymerase hybrids was demonstrated.
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Affiliation(s)
- V. Cengiz Ozalp
- Istanbul Kemerburgaz University
- School of Medicine
- 34217 Istanbul
- Turkey
| | - G. Bayramoglu
- Biochemical Processing and Biomaterial Research Laboratory
- Faculty of Science
- Gazi University
- Ankara
- Turkey
| | - M. Yakup Arica
- Department of Chemistry
- Faculty of Science
- Gazi University
- Ankara
- Turkey
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Canbek M, Bayramoglu G, Senturk H, Oztopcu Vatan AP, Uyanoglu M, Ceyhan E, Ozen A, Durmus B, Kartkaya K, Kanbak G. The examination of protective effects of gallic acid against damage of oxidative stress during induced-experimental renal ischemia-reperfusion in experiment. ACTA ACUST UNITED AC 2014; 115:557-62. [PMID: 25318915 DOI: 10.4149/bll_2014_108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
AIM In this study, probable effects of gallic acid were investigated in experimentally induced renal I/R injury in rats. MATERIAL AND METHODS For this purpose, each group consisted of 7 Spraque dawley male albino rats. Groups were defined as follows; Group I: control group; Group II: I/R group; Group III, IV and V: I/R+Gallic acid (50, 100 and 200 mg.kg-1 respectively-i.p.). Left kidney was removed by nephrectomy except for Group I. I/R was induced in the other kidney. Gallic acid was given 15 mins before ischemia induction. SOD, CAT and Gpx activities were determined by electrophoresis. MDA, MPO levels were determined spectrophotometrically. Histopathological investigations were also performed in kidney tissues. BUN and Creatinine levels in serum were determined. RESULTS BUN, Creatinine and MDA levels were statistically significant but MPO level was not statistically significantly increased in Group II. For SOD, CAT, Gpx activities in Group II, an increase was determined with respect to Group I. Histopathological investigations revealed widespread hyperemia in glomerulus, expansion of the structure between tubules and cell disruptions in Group II. In Group V (200 mg.kg-1 gallic acid), in terms of biochemical parameters, in spite of the significant decrease in BUN, Creatinine and MDA levels; a decrease was determined in SOD, CAT and Gpx isoenzyme activities. Group V showed histologically that I/R injury had been prevented to a greater extent and appearances were close to the control. CONCLUSION As a result, in terms of our study, evaluations regarding kidney functions and histopathology have shown that gallic acid has protective effects in renal I/R injury (Tab. 2, Fig. 5, Ref. 36).
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Tosun I, Akyuz Z, Guler NC, Gulmez D, Bayramoglu G, Kaklikkaya N, Arikan-Akdagli S, Aydin F. Distribution, virulence attributes and antifungal susceptibility patterns of Candida parapsilosis complex strains isolated from clinical samples. Med Mycol 2012; 51:483-92. [PMID: 23216051 DOI: 10.3109/13693786.2012.745953] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
It was recently proposed that Candida parapsilosis represents a complex composed of three closely related species, i.e., C. parapsilosis sensu stricto, C. orthopsilosis, and C. metapsilosis. The aim of this study was to describe the distribution of C. parapsilosis complex isolates among clinical samples. We also evaluated antifungal susceptibility profiles, in vitro presence of lipase and secreted aspartyl proteinase, as well as their ability to grow in total parenteral nutrition (TPN) solution, and biofilm production. A total of 413 non-C. albicans Candida isolates were obtained from various clinical samples between 2010 and 2011 in a Turkish Tertiary Care Hospital. Of them, 42 were identified as members of the C. parapsilosis complex. Among these, 38 (90.5%) were C. parapsilosis sensu stricto, 3 (7.1%) C. metapsilosis, and 1 (2.4%) C. orthopsilosis. All isolates recovered from blood were found to be C. parapsilosis sensu stricto and C. metapsilosis. In phenotypic tests, all 42 isolates grew in TPN solution and, although 26.2% of C. parapsilosis sensu stricto-isolates were capable of forming biofilms in vitro, neither C. orthopsilosis nor C. metapsilosis isolates were able to do so. Acid proteinase activity was detected in 31% of isolates and lipase activity in 33%. All isolates were sensitive to voriconazole, caspofungin, and anidulafungin, with only a single C. parapsilosis sensu stricto isolate showing dose-dependent susceptible to fluconazole. While the number of C. metapsilosis and C. orthopsilosis isolates remained low, there were no significant differences in antifungal MIC as compared to C. parapsilosis sensu stricto.
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Affiliation(s)
- Ilknur Tosun
- Department of Medical Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
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Bayramoglu G, Kaya S, Besli Y, Cakır E, Can G, Akıneden O, Aydin F, Koksal I. Molecular epidemiology and the clinical significance of Acinetobacter baumannii complex isolated from cerebrospinal fluid in neurosurgical intensive care unit patients. Infection 2011; 40:163-72. [PMID: 22038112 DOI: 10.1007/s15010-011-0215-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 10/05/2011] [Indexed: 11/24/2022]
Abstract
OBJECTIVE This study was intended to investigate the clinical significance and molecular epidemiology of Acinetobacter baumannii complex (ABC) isolated from cerebrospinal fluid (CSF) in neurosurgical intensive care unit (NSICU) patients, particularly comparing isolates from healthcare workers' (HCW) hands. METHODS We retrospectively reviewed the medical records of 30 patients with CSF cultures positive for ABC seen at our NSICU from the date it first opened, January 2007, to September 2010. Pulsed-field gel electrophoresis (PFGE) typing was performed on 68 strains isolated from 32 patients' CSF and 36 HCWs' hands. RESULTS ABC isolates were considered to be clinically significant in 21 (70.0%) patients but insignificant in the other nine (30.0%) patients. The prolonged (>7 days) use of cephalosporins was more common in patients with clinically significant ABC isolates (p = 0.049). Multiple drug resistance (MDR) was observed in 12 (57.1%) clinically significant isolates. Empirical antimicrobial therapies were not appropriate for nine of these 21 patients (42.8%). Mortality was significantly higher in the clinically significant group than in the clinically insignificant group (18/21 vs. 3/9; p = 0.008). Fifty-three isolates (77.9%) were grouped into 15 clusters, three of which contained possibly related isolates from patients' CSF and staff members' hands. CONCLUSIONS The fact that ABC isolates grown from CSF cultures do not always exhibit infection and have high multiple antibiotic resistance, including to carbapenems, should be borne in mind when planning treatment for these patients. In addition, HCWs' hands may play a significant role in transmission to patients, and compliance with infection control procedures, especially hand washing, must be enhanced in order to avoid ABC infections.
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Affiliation(s)
- G Bayramoglu
- Department of Microbiology and Clinical Microbiology, Karadeniz Technical University, Trabzon, Turkey.
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Bayramoglu G, Buruk K, Dinc U, Mutlu M, Yilmaz G, Aslan Y. Investigation of an outbreak of Serratia marcescens in a neonatal intensive care unit. Journal of Microbiology, Immunology and Infection 2011; 44:111-5. [DOI: 10.1016/j.jmii.2010.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 01/12/2010] [Accepted: 02/24/2010] [Indexed: 02/08/2023]
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Nordmann P, Picazo JJ, Mutters R, Korten V, Quintana A, Laeuffer JM, Seak JCH, Flamm RK, Morrissey I, Azadian B, El-Bouri K, Jones G, Masterton B, Morgan M, Oppenheim B, Waghorn D, Smyth E, Abele-Horn M, Jacobs E, Mai U, Mutters R, Pfister W, Schoerner C, Seifert H, Bebear C, Bingen E, Bonnet R, Jehl F, Levy PY, Nordmann P, Delvallez MR, Paniara O, Papaparaskevas J, Piotr H, Kolar M, Zemlickova H, Hanzen J, Kotulova D, Campa M, Fadda G, Fortina G, Gesu G, Manso E, Milano F, Nicoletti G, Pucillo L, Rigoli R, Rossolini G, Sambri V, Sarti M, Akalin H, Sinirtas M, Akova M, Hascelik G, Arman D, Dizbay M, Aygen B, Sumerkan B, Dokuzoguz B, Esener H, Eraksoy H, Basaran S, Koksal I, Bayramoglu G, Korten V, Soyletir G, Ulusoy S, Tunger A, Yalcin AN, Ogunc D, Bou G, Bouza E, Canton R, Coll P, Garcia-Rodriguez JA, Gimeno C, Gobernado M, Bertomeu FG, Gomez-Garces JL, Marco F, Martinez-Martinez L, Pascual A, Perez JL, Picazo J, Prats G, Linares MS, Ghaly F, Cristino M, Diogo J, Ramos H, Balode A, Jurna-Ellam M, Koslov R. Comparative activity of carbapenem testing: the COMPACT study. J Antimicrob Chemother 2011; 66:1070-8. [DOI: 10.1093/jac/dkr056] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Aydin F, Bayramoglu G, Guler NC, Kaklikkaya N, Tosun I. Bloodstream yeast infections in a university hospital in Northeast Turkey: a 4-year survey. Med Mycol 2010; 49:316-9. [PMID: 20807028 DOI: 10.3109/13693786.2010.512023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study presents data on species distribution and antifungal susceptibility profiles of Candida bloodstream isolates obtained from a Turkish Tertiary Care Hospital during a 4-year period. All hospitalized patients who had ≥ 1 blood culture positive for yeast during their hospital stay from January 2005 through 2009 were included in this study. All isolates were identified to species level using CHROMagar and ID 32 C. Fluconazole and voriconazole antifungal susceptibility testing was performed using the disk diffusion method according to CLSI M44-A. In vitro activity of amphotericin B was determined by the Etest. Of all 166 yeast isolates, C. albicans was the dominant species (34.3%), followed by Candida parapsilosis (28.9%) and C. tropicalis (8.4%). All of the 48 C. parapsilosis strains were identified as C. parapsilosis sensu stricto. Resistance to fluconazole was more common among C. krusei isolates. Voriconazole resistance was absent. One C. lusitaniae strain showed a high amphotericin MIC (4 μg/ml). Our survey indicated an increase of some non-C. albicans Candida species in our hospital while antifungal resistance was uncommon.
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Affiliation(s)
- Faruk Aydin
- Karadeniz Technical University, Faculty of Medicine, Department of Clinical Microbiology, Trabzon, Turkey
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Dinc U, Bayramoglu G, Buruk K, Ulusoy H, Tosun I, Kaklikkaya N. Molecular epidemiology of Acinetobacter baumannii-Acinetobacter calcoaceticus complex isolated from clinical specimens at an intensive care unit. Saudi Med J 2010; 31:453-455. [PMID: 20383429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Affiliation(s)
- Ugur Dinc
- Department of Microbiology and Clinical Microbiology, Farabi Hospital, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Bayramoglu G, Sonmez M, Tosun I, Aydin K, Aydin F. Breakthrough Trichosporon asahii fungemia in neutropenic patient with acute leukemia while receiving caspofungin. Infection 2007; 36:68-70. [PMID: 17882360 DOI: 10.1007/s15010-007-6278-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Accepted: 02/26/2007] [Indexed: 10/22/2022]
Abstract
A 47-year-old man with newly diagnosed acute myeloblastic leukemia and non-insulin-dependent diabetes mellitus developed Trichosporon asahii fungemia while receiving caspofungin as empirical antifungal therapy. The diagnosis was based on repeated isolation of T. asahii in culture of blood for three times. Despite treatment with amphotericin B and voriconazole, the patient died. The in vitro antifungal susceptibilities of the T. asahii isolates were only available after the patient died. In vitro antifungal susceptibility tests showed high caspofungin and amphotericin B minimal inhibitory concentrations (MICs) value for this Trichosporon strain (MICs, 16 microg/ml, and>32 microg/ml, respectively). Fluconazole, itraconazole, and voriconazole exhibited low MICs in vitro (MICs, 4 microg/ml, 0.5 microg/ml, and<or=0.015 microg/ml, respectively). Our experience strongly suggest that identification and antifungal susceptibility testing for T. asahii in neutropenic patients who may develop signs of infection in the presence of caspofungin as well as broadspectrum antibiotics treatment should not be overlooked.
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Affiliation(s)
- G Bayramoglu
- Department of Microbiology and Clinical Microbiology, Karadeniz Technical University, School of Medicine, 6180, Trabzon, Turkey.
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Bayramoglu G, Acuner IC, Sinirtas M, Gedikoglu S, Durupinar B. Performance evaluation of the BD phoenix automated microbiology system in meropenem susceptibility testing of clinical Pseudomonas aeruginosa isolates. Saudi Med J 2006; 27:1921-3. [PMID: 17143380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Affiliation(s)
- Gulcin Bayramoglu
- Department of Microbiology and Clinical Microbiology, Faculty of Medicine, Karadeniz Teknik University, Kalkinma Campus, Trabzon, Turkey.
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Tuglu D, Basar M, Bayramoglu G, Arica Y, Kilic D, Bozdogan O, Batislam E. UP-03.73. Urology 2006. [DOI: 10.1016/j.urology.2006.08.939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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