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  • Küçük Resim
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    Fusidic acid resistance among staphylococci strains isolated from clinical specimens in a general hospital
    (Dicle Üniversitesi Tıp Fakültesi, 2012) Özer, Türkan Toka; Yula, Erkan; Tekin, Alicem; Deveci, Özcan
    Objectives: The aim of this study was to investigate in vitro susceptibility of fusidic acid to clinic isolates of staphylococci. Materials and methods: The forty-one coagulase negative staphylococci (CNS) and 18 Staphylococcus aureus strains isolated from various clinical specimens were included in this study. Staphylococci isolates were identified by conventional methods such as colony morphology onto medium, gram staining, catalase and coagulase tests. According to “Clinical and Laboratory Standards Institute (CLSI)” criteria, antimicrobial susceptibility testing of isolates was performed by Kirby-Bauer’s disk diffusion method. Results: The seventy-two percent of the isolated S.aureus were defined as methicillin sensitive-S.aureus (MSSA), 28% of the isolated S.aureus were defined as methicillin resistant-S.aureus (MRSA). The difference among fusidic acid susceptibility rates of MSSA and MRSA strains was not statistically significant (p=0.305). The twenty-nine percent of the isolated CNS were defined as methicillin sensitive-CNS (MS-CNS), 71% of the isolated CNS were defined as methicillin resistant-CNS (MR-CNS). There was no statistically significant difference between MS-CNS and MR-CNS strains for fusidic acid susceptibility rates (p=0.490). But the difference among fusidic acid susceptibility rates of CNS and S.aureus strains was statistically significant (p<0.001). CNS strains were found more resistance than S.aureus strains for fusidic acid. Conclusion: In this study, the resistance rates were detected to increase for fusidic acid along with methicillin resistance. Among CNS isolates, fusidic acid resistance rates were significantly more elevated than that for S.aureus. Fusidic acid remains as an alternative in the treatment of infections due to staphylococci.
  • Küçük Resim
    Öğe
    Investigation of Entamoeba histolytica in stool specimens by direct microscopic examination and ELISA in a hospital
    (Dicle Üniversitesi Tıp Fakültesi, 2011) Özer, Türkan Toka; Yula, Erkan; Deveci, Özcan; Tekin, Alicem; Durmaz, Süleyman; Yanık, Keramettin
    Objectives: Stool antigen assay has been shown to be as sensitive and specific as culture with isoenzyme analysis and to outperform microscopy for the detection of E.histolytica in endemic area. The aim of the present study is to investigate the presence of E.histolytica by direct microscopic examination and ELISA in stool samples, comparatively. Materials and methods: Between September 2010 and May 2011, a total of 975 stool samples of patients in different age groups were sent to microbiology laboratory of Kızıltepe General Hospital. Native-Lugol method and E.histolytica-specific antigen test (Adhesin Ag, Entamoeba CELISA Path) was applied to all stool samples. Results: E.histolytica/dispar cysts and/or trophozoites were observed in 21 out of 975 (2.2%) stool samples examined by native-Lugol method. In addition, E.histolyticaspecific antigen in 975 stool specimens was investigated by ELISA. E.histolytica-specific antigen was determined in 4 patients which had E.histolytica/dispar cysts and/or trophozoites at direct microscopic examination. Although at direct microscopy of 3 patients E.histolytica/dispar cysts and/or trophozoites not observed, E.histolyticaspecific antigen was found favorable. A total of 7 (0.7%) E.histolytica specific antigen was found in the patient’s stool samples. Patients with E.histolytica-specific antigen were treated. Conclusion: E.histolytica specific antigen in stool samples should be investigated to avoid unnecessary treatment.
  • Küçük Resim
    Öğe
    Üriner sistem infeksiyonlarından izole edilen Escherichia coli suşlarına fosfomisin trometamolün ve bazı antibiyotiklerin in-vitro etkinliği
    (Dicle Üniversitesi Tıp Fakültesi, 2011) Deveci, Özcan; Yula, Erkan; Özer, Türkan Toka; Tekin, Alicem
    Amaç: Son yıllarda ülkemizde ve dünyada üropatojen E.coli suşlarında üriner sistem infeksiyonu tedavisinde sık kullanılan antibiyotiklere karşı duyarlılıkta azalma görülmektedir. Direnç nedeniyle tedavi yetersizliği ve ampirik tedavinin değiştirilmesi ihtiyacı, reçete maliyetlerinde artış, hastanede kalma süresinde uzama, sosyal maliyet, morbidite ve mortalitede artış ortaya çıkmaktadır. Bu çalışmada, üriner sistem infeksiyon etkeni olan E.coli’nin bazı antibiyotiklere ve fosfomisine olan duyarlılığının araştırılması amaçlanmıştır. Gereç ve yöntem: Kızıltepe Devlet Hastanesi Merkez laboratuarına Ağustos 2010-Aralık 2010 tarihleri arasında polikliniklerden gelen idrar örneklerinden izole edilen E.coli izolatları çalışmaya alınmıştır. Bu izolatlar idrar mikroskobisinde 10/mm3 lökositi olup üriner sistem infeksiyonu düşündüğümüz hastaların idrar kültürlerinden elde edilmiştir. Bu çalışmada üropatojen E.coli infeksiyonlarında FOT (fosfomisin), CIP (Siprofloksasin), IP (İmipenem), TZP (Piperasilin-Tazobactam), CAZ (Ceftazidim)’in duyarlılıklarına bakılmıştır. Antibiotik duyarlılıkları CLSI (Clinical Laboratory Standards Institute) önerileri doğrultusunda Kirby-Bauer disk difüzyon yöntemi ile değerlendirilmiştir. Kontrol suşu olarak E.coli ATCC 25922 kullanılmıştır. Bulgular: Ağustos 2010-Aralık 2010 tarihleri arasında incelenen idrar örneklerinden izole edilen E.coli suşlarının hepsi fosfomisine duyarlı bulunmuştur. Siprofloksasine, İmipenem, Piperasilin-Tazobaktam, Seftazidime karşı direnç oranları sırasıyla; %33,3, %49,1, %36,8, %45,6 olarak belirlenmiştir. Sonuç: Toplum kökenli üriner sistem infeksiyonlarında fosfomisin; yüksek düzey duyarlılık oranları nedeni ile non-komplike üriner sistem enfeksiyonlarında tercih edilebilir bir antimikrobiyal ajandır.