Assessment of sharps penetrating injury, mucosal exposure and compliance with standard precautions of health workers at a University Hospital in Turkey.

OBJECTIVES: To evaluate the compliance with standard precautions in healthcare workers who experienced a sharps penetrating injury or mucosal exposure using the compliance with Standard Precautions Scale, Turkish version. METHODS: This descriptive cross-sectional study was conducted in a tertiary hospital. The occupational health and safety unit records of healthcare workers who were injured by a sharps penetrating injury or experienced mucosal exposure between January 2018 and July 2020 were examined. Compliance with the Standard Precautions Scale was assessed by having participants answer a questionnaire. RESULTS: Of the 100 participants, 59% were men. Of all healthcare workers in the university hospital, 4.5% (n=100) were injured by sharps penetrating injuries or mucosal exposure. Of the participants, 95% were wounded by a sharps penetrating injury and 5% had mucosal exposure. The mean Compliance with Standard Precautions Scale score of participants with a sharps penetrating injury was 16.36±2.39 and with mucosal exposure was 16.80±3.03. There was no significant difference between the mean Compliance with Standard Precautions Scale scores of the sharps penetrating injury and mucosal exposure groups regardless of training on occupational health and safety (p=0.794). CONCLUSION: In conclusion, the frequency of a sharps penetrating injury and mucosal exposure in healthcare workers was similar to the literature. The compliance level of the healthcare workers measured with the Compliance with Standard Precautions Scale was high.

Evaluation of inflammatory and hematological parameters in patients diagnosed with COVID-19.

INTRODUCTION: This study aims to research the effects of hematological and inflammatory parameters on the prognosis of COVID-19 disease and hospitalization duration. METHODOLOGY: One hundred and eighty-six patients with COVID-19 and a control group consisting of 187 healthy individuals were included in the study. Hematological variables and inflammatory parameters of the patients were recorded on the first and the fifth days of hospitalization. RESULTS: White blood cell count, lymphocyte count, and platelet count were statistically lower, and mean platelet volume (MPV), neutrophil to lymphocyte ratio (NLR), and platelet to lymphocyte ratio (PLR) levels were higher in the patient group compared to the control group. It was observed that the neutrophil count and MPV level were lower, and the platelet count and ferritin level were statistically higher on the fifth day of follow-up compared to the admission day. In contrast, there was a significantly positive correlation between the duration of hospitalization and the fifth day D-dimer (r = 0.546, p < 0.001) and ferritin (r = 0.568, p < 0.001); in addition, there was a negative correlation between the duration of hospitalization and admission day lymphocyte count and the fifth-day lymphocyte count. CONCLUSIONS: Increased levels of ferritin and D-dimer, and decreased count of lymphocytes are among the important factors affecting the duration of hospitalization for COVID-19 patients. Furthermore, we think that neutrophil count and MPV levels are low, and platelet count and ferritin levels are high during the disease. Therefore, these parameters can be used as prognostic indicators of the disease.

Serum TNF-α, IL-1ß, and IL-6 levels in chronic HBV-infected patients.

BACKGROUND: The objective of the study was to evaluate the serum levels of tumour necrosis factor (TNF)-α, interleukin (IL)-1ß and IL-6 in chronic HBV-infected patients. METHODS: The present study was a single centre, prospective and randomised controlled trial. Twenty healthy volunteers and thirty HBeAg-negative patients with planned liver biopsy and treatment-naive diagnosed with chronic hepatitis B (CHB) were included in the study. TNF-α, IL-1ß and IL-6 levels were measured in the serum of CHB patient and control groups using an ELISA. Results were compared statistically using a Mann-Whitney U test. RESULTS: The mean age of the CHB group (20 men, 10 women) and the control group (10 men, 10 women) was 33.3 ± 9.7 (17-55) and 26.1 ± 12.3 (16-57), respectively. When the two groups were compared with the Mann-Whitney U-test, TNF-α and IL-6 levels were found to be significantly higher in the CHB group compared to the control group (P = .003, P < .0001, respectively). Although IL-1ß levels were not statistically significant, they were higher in the CHB group compared to the controls (P = .07). CONCLUSIONS: The results of our study showed that serum levels of TNF-α and IL-6 are increased in CHB patients.

Prognostic value of Golgi P 73 and Beta 2-microglobulin in patients with Viral Hepatitis B.

Previous studies detected higher Golgi protein 73 levels in the serum of patients with chronic liver disease. The Beta-2 microglobulin levels were also observed to be higher in patients with chronic hepatitis B infection compared to the inactive carriers and the protein plays an important role in the response to viral infections. The aim of the present study was to assess the liver fibrosis through non-invasive methods in chronic hepatitis B patients. Three groups were included in the study. The first group comprised of the patients who were admitted to the Infectious Diseases and Clinical Microbiology clinic to undergo a liver biopsy, while the second group included the patients who were admitted inactive hepatitis B carriers. The third group comprised the healthy controls. The Golgi p-73 and Beta-2 microglobulin levels in the plasma were determined using the ELISA method. Beta-2 microglobulin level was highest in the patients group and the difference was statistically significant. No significant difference was observed between the carriers group and the group of healthy controls. The Golgi P-73 values were significantly higher in the patients group in comparison to both other groups. However, the mean Golgi p-73 value was also significantly higher in the carrier group compared to the control group. In patients who are followed up with the diagnosis of chronic hepatitis B and who have undergone biopsies as candidates for treatment, the Beta-2 microglobulin and Golgi p-73 values may be important markers since they indicate the extent of the liver damage.

Risk factors for central venous catheter-related bloodstream infections.

Our study aimed to identify the risk factors playing a role in central venous catheter-related bloodstream infections (CR-BSI) in a tertiary large volume university hospital. The current prospective clinical trial was conducted in a university hospital with 1400 beds. All demographic data, length of hospital stay, coexisting diseases, features of catheters used, invasive diagnostic and therapeutic procedures and all antibiotics used in patients with CVCs were recorded. A total of 356 CVCs inserted in 281 patients were followed up for 5667 catheter days. The mean duration of catheterization was recorded as 15.9±12.7days. CR-BSI was detected in 46 (12.9%) patients. The incidence of CR-BSI was found to be 8.12 in 1000 catheter days. Advanced age and longer duration of catheterization were found to be independent risk factors for the development of CR-BSI in multivariate analysis. Coagulase-negative staphylococci (15.2%), Candida spp (13%) and Klebsiella pneumoniae (13%) were the agents most frequently isolated.

HBsAg, anti-HCV and anti-HIV seroprevalence among blood donors in Southeastern Anatolia, Turkey, 2011-2015.

Transmission of infections through blood and blood product transfusion is a serious healthcare problem. There are insufficient up-to-date data about seroprevalence of HBsAg, anti-HCV and anti-HIV ½ among healthy blood donors in Turkey. We aimed to investigate the seroprevalence of HBsAg, anti-HCV and anti-HIV ½ in Southeastern Anatolia, Turkey. HBsAg, anti-HCV, and anti-HIV ½ analysis results among blood donors who applied to Dicle University Faculty of Medicine, Diyarbakir District Blood Centre, between January 1, 2011 and December 31, 2015 were retrospectively evaluated. HBsAg, anti-HCV, and anti-HIV 1/2 screenings were performed using a fully automated device with the microparticle enzyme immunoassay method (MEIA). The chi-square (χ2) test was applied to variables. Among the donors, 1607 (1.73%) were HBsAg-positive, 255 (0.27%) were anti-HCV-positive and two (0.0021%) were positive for anti-HIV 1/2. HBsAg positivity rates by years were 2.50% in 2011, 1.92% in 2012, 1.74% in 2013, 1.53% in 2014 and 1.27% in 2015 (p<0.001). HBsAg-positivity was 0.78% for the donors between 18-24 years of age, 1.90% for those between 25-49 years of age and 3.92% for donors over the age of 49 (p<0.001). Anti-HCV positivity rates were as follows: 0.35% in 2011, 0.34% in 2012, 0.29% in 2013, 0.23% in 2014 and 0.16% in 2015 (p<0.001). Verified anti-HIV 1/2 positivity was observed for only two donors (0.0021%) within five years. HBsAg and anti-HCV positivity were observed to decrease significantly over the years and were significantly lower among younger donors.

Comparison of culture and PCR methods in the diagnosis of bacterial meningitis

Abstract Our aim in this study is to compare the standard culture method with the multiplex PCR and the Speed-Oligo® Bacterial Meningitis Test (SO-BMT) – a hybridization-based molecular test method – during the CSF examination of the patients with the pre-diagnosis of acute bacterial meningitis. For the purposes of this study, patients with acute bacterial meningitis treated at the Dicle University Medical Faculty Hospital, Infectious Diseases and Clinical Microbiology Clinic between December 2009 and April 2012 were retrospectively evaluated. The diagnosis of bacterial meningitis was made based on the clinical findings, laboratory test anomalies, CSF analysis results, and the radiological images. Growth was observed in the CSF cultures of 10 out of the 57 patients included in the study (17.5%) and Streptococcus pneumoniae was isolated in all of them. The CSF samples of 34 patients (59.6%) were positive according to the SO-BMT and S. pneumoniae was detected in 33 of the samples (97.05%), while Neisseria meningitidis was found in 1 sample (2.95%). In a total of 10 patients, S. pneumoniae was both isolated in the CSF culture and detected in the SO-BMT. The culture and the SO-BMT were negative in 23 of the CSF samples. There was no sample in which the CSF culture was positive although the SO-BMT was negative. While SO-BMT seems to be a more efficient method than bacterial culturing to determine the pathogens that most commonly cause bacterial meningitis in adults, further studies conducted on larger populations are needed in order to assess its efficiency and uses.

Comparison of culture and PCR methods in the diagnosis of bacterial meningitis.

Our aim in this study is to compare the standard culture method with the multiplex PCR and the Speed-Oligo® Bacterial Meningitis Test (SO-BMT) - a hybridization-based molecular test method - during the CSF examination of the patients with the pre-diagnosis of acute bacterial meningitis. For the purposes of this study, patients with acute bacterial meningitis treated at the Dicle University Medical Faculty Hospital, Infectious Diseases and Clinical Microbiology Clinic between December 2009 and April 2012 were retrospectively evaluated. The diagnosis of bacterial meningitis was made based on the clinical findings, laboratory test anomalies, CSF analysis results, and the radiological images. Growth was observed in the CSF cultures of 10 out of the 57 patients included in the study (17.5%) and Streptococcus pneumoniae was isolated in all of them. The CSF samples of 34 patients (59.6%) were positive according to the SO-BMT and S. pneumoniae was detected in 33 of the samples (97.05%), while Neisseria meningitidis was found in 1 sample (2.95%). In a total of 10 patients, S. pneumoniae was both isolated in the CSF culture and detected in the SO-BMT. The culture and the SO-BMT were negative in 23 of the CSF samples. There was no sample in which the CSF culture was positive although the SO-BMT was negative. While SO-BMT seems to be a more efficient method than bacterial culturing to determine the pathogens that most commonly cause bacterial meningitis in adults, further studies conducted on larger populations are needed in order to assess its efficiency and uses.

Antifungal Susceptibility and Risk Factors in Patients with Candidemia.

OBJECTIVE: This study aimed to investigate the antifungal susceptibility, typology, and risk factors of candidemia among adult and pediatric inpatients at a university hospital. MATERIALS AND METHODS: A case-control study was designed, and data collected between December 2013 and December 2014 were retrospectively evaluated. The case group consisted of patients with candidemia. The control group was selected from the inpatients that did not develop candidemia but were admitted in the same clinic and during the same period as the candidemia group. The diagnosis of candidemia was based on a compatible clinical picture and positive blood culture of Candida spp. The demographic characteristics, sequential organ failure assessment (SOFA) scores, comorbidities, use of invasive devices, antibiotics administered, and duration of antibiotic uses were compared between both the groups. RESULTS: Out of the 84 patients, 42 (50%) were included in the case group, and the remaining 42 (50%) were included in the control group. Out of all the patients, 31 (36.9%) were female, and 53 (63.1%) were male. When the clinical findings of the case and control groups were compared, the prevalence of nosocomial infections, sepsis, candiduria, and fever was statistically significantly higher in the case group. Among the isolated group in the study, 22 (52.4%) were identified as C. albicans, while the others were non-albicans Candida strains. The C. albicans strain (4.5%) was resistant to fluconazole, while 7 among the non-albicans Candida strains (35%) were resistant to fluconazole. In the case group, abdominal surgery, CVP catheter presence, TPN, endotracheal intubation, frequency of blood transfusion, and SOFA scores were significantly higher than the control groups. The logistic regression test demonstrated that TPN and blood transfusion are the most important risk factors for candidemia (OR=8.14 and OR=5.96, respectively). CONCLUSION: The invasive Candida infections continue to be a major health problem in Turkey and in our hospital. Particularly, it was observed that it is important to perform invasive procedures, antibiotic administration and parenteral nutrition carefully in patients hospitalized in the ICU.

Hamsi scoring in the prediction of unfavorable outcomes from tuberculous meningitis: results of Haydarpasa-II study.

Predicting unfavorable outcome is of paramount importance in clinical decision making. Accordingly, we designed this multinational study, which provided the largest case series of tuberculous meningitis (TBM). 43 centers from 14 countries (Albania, Croatia, Denmark, Egypt, France, Hungary, Iraq, Italy, Macedonia, Romania, Serbia, Slovenia, Syria, Turkey) submitted data of microbiologically confirmed TBM patients hospitalized between 2000 and 2012. Unfavorable outcome was defined as survival with significant sequela or death. In developing our index, binary logistic regression models were constructed via 200 replicates of database by bootstrap resampling methodology. The final model was built according to the selection frequencies of variables. The severity scale included variables with arbitrary scores proportional to predictive powers of terms in the final model. The final model was internally validated by bootstrap resampling. A total of 507 patients' data were submitted among which 165 had unfavorable outcome. Eighty-six patients died while 119 had different neurological sequelae in 79 (16%) patients. The full model included 13 variables. Age, nausea, vomiting, altered consciousness, hydrocephalus, vasculitis, immunosuppression, diabetes mellitus and neurological deficit remained in the final model. Scores 1-3 were assigned to the variables in the severity scale, which included scores of 1-6. The distribution of mortality for the scores 1-6 was 3.4, 8.2, 20.6, 31, 30 and 40.1%, respectively. Altered consciousness, diabetes mellitus, immunosuppression, neurological deficits, hydrocephalus, and vasculitis predicted the unfavorable outcome in the scoring and the cumulative score provided a linear estimation of prognosis.

In vitro susceptibility to methicillin, vancomycin and linezolid of staphylococci isolated from bloodstream infections in eastern Turkey.

Staphylococcus species are one of the major causes of bacterial bloodstream infections. Multi-resistant staphylococci infections are major therapeutic problems. This study was aimed to detect methicillin, linezolid and vancomycin susceptibilities of Staphylococcus isolates. A total of 870 Staphylococcus strains isolated from blood cultures of hospitalized patients with BSI. Antimicrobial susceptibilities of methicillin, linezolid and vancomycin were detected according to the Clinical and Laboratory Standards Institute (CLSI). A total of 771 (88.6%) isolates were coagulase-negative staphylococci (CoNS). 700 (80.5%) isolates were methicillin-resistant (MR) and 170 (19.5%) were methicillin-susceptible (MS). All the MS isolates were also susceptible to linezolid. However 15 (1.7%) of MR strains were resistant to linezolid. The minimum inhibitory concentration range for the linezolid-resistant isolates by Etest was 6-32 µg/mL. The difference between linezolid susceptibilities for MS and MR staphylococci was not quite statistically significant (p = 0.052). There was no statistically significant difference between S. aureus and CoNS isolates for linezolid susceptibility. All of the isolates were susceptible to vancomycin. In conclusion, linezolid is currently an efficient option for the treatment of methicillin-resistant staphylococci infections.

In vitro susceptibility to methicillin, vancomycin and linezolid of staphylococci isolated from bloodstream infections in eastern Turkey

Staphylococcus species are one of the major causes of bacterial bloodstream infections. Multi-resistant staphylococci infections are major therapeutic problems. This study was aimed to detect methicillin, linezolid and vancomycin susceptibilities of Staphylococcus isolates. A total of 870 Staphylococcus strains isolated from blood cultures of hospitalized patients with BSI. Antimicrobial susceptibilities of methicillin, linezolid and vancomycin were detected according to the Clinical and Laboratory Standards Institute (CLSI). A total of 771 (88.6%) isolates were coagulase-negative staphylococci (CoNS). 700 (80.5%) isolates were methicillin-resistant (MR) and 170 (19.5%) were methicillin-susceptible (MS). All the MS isolates were also susceptible to linezolid. However 15 (1.7%) of MR strains were resistant to linezolid. The minimum inhibitory concentration range for the linezolid-resistant isolates by Etest was 6-32 µg/mL. The difference between linezolid susceptibilities for MS and MR staphylococci was not quite statistically significant (p = 0.052). There was no statistically significant difference between S. aureus and CoNS isolates for linezolid susceptibility. All of the isolates were susceptible to vancomycin. In conclusion, linezolid is currently an efficient option for the treatment of methicillin-resistant staphylococci infections.

Mortality indicators in pneumococcal meningitis: therapeutic implications.

BACKGROUND: The aim of this study was to delineate mortality indicators in pneumococcal meningitis with special emphasis on therapeutic implications. METHODS: This retrospective, multicenter cohort study involved a 15-year period (1998-2012). Culture-positive cases (n=306) were included solely from 38 centers. RESULTS: Fifty-eight patients received ceftriaxone plus vancomycin empirically. The rest were given a third-generation cephalosporin alone. Overall, 246 (79.1%) isolates were found to be penicillin-susceptible, 38 (12.2%) strains were penicillin-resistant, and 22 (7.1%) were oxacillin-resistant (without further minimum inhibitory concentration testing for penicillin). Being a critical case (odds ratio (OR) 7.089, 95% confidence interval (CI) 3.230-15.557) and age over 50 years (OR 3.908, 95% CI 1.820-8.390) were independent predictors of mortality, while infection with a penicillin-susceptible isolate (OR 0.441, 95% CI 0.195-0.996) was found to be protective. Empirical vancomycin use did not provide significant benefit (OR 2.159, 95% CI 0.949-4.912). CONCLUSIONS: Ceftriaxone alone is not adequate in the management of pneumococcal meningitis due to penicillin-resistant pneumococci, which is a major concern worldwide. Although vancomycin showed a trend towards improving the prognosis of pneumococcal meningitis, significant correlation in statistical terms could not be established in this study. Thus, further studies are needed for the optimization of pneumococcal meningitis treatment.

Analysis of antimicrobial consumption and cost in a teaching hospital.

BACKGROUND: The aim of this study is to compare the periods before and after the intervention applied using the ATC/DDD method in order to ascertain the rational use of antibiotics in a newly established hospital. METHOD: The appropriateness of the hospital's antibiotic use, consumption rates and the costs were calculated and compared with other hospitals. Based on these data, an intervention has been planned in order to raise the quality of antibiotic use. The periods before and after the intervention were compared. Between 16 May 2011 and 23 May 2012, data were collected from all hospital units by the infectious diseases specialists and a point prevalence survey was conducted. Anatomical therapeutic chemical classification and the defined daily dose (DDD) methodology were used to calculate the antibiotic consumption. RESULTS: On two specific days in 2011 and 2012, 194 out of 307 patients (63.2%) and 224 out of 412 patients (54.4%) received antibiotic treatment, respectively. In 2011 and 2012, the percentage of appropriate antibiotic use was 51% and 64.3%, respectively. Both in 2011 and 2012, inappropriate antibiotic use was found to be significantly higher in surgical clinics in comparison to the internal diseases clinics and the ICU. This was caused by the high rates of inappropriate perioperative antimicrobial prophylaxis observed in surgical clinics. During both years, approximately one-third of the antibiotics were prescribed for the purposes of perioperative prophylaxis, while 88.5% and 43.7% of these, respectively, were inappropriate and unnecessary. Cephalosporins, fluoroquinolones, combinations of penicillins (including ß-lactamase inhibitors) and carbapenems were the most frequently prescribed antibiotics during the study periods. The mean total antibiotic consumption was 93.6 DDD/100 bed-days and 63.1 DDD/100 bed-days, respectively. The cost of total antibacterial consumption was € 7901.33 for all the patients (€ 40.72 per infected patient) and € 6500.26 (€ 29.01 per infected patient), respectively. CONCLUSION: Each hospital should follow and assess their antibiotic use expressed in DDD in order to compare their antibiotic use with national and international hospitals (WHO, 2009 [14]).

Assessment of perioperative antimicrobial prophylaxis using ATC/DDD methodology.

OBJECTIVES: In the light of international experience and guidelines and in order to improve the quality of perioperative antimicrobial prophylaxis (PAP), various hospitals have set up their own multidisciplinary healthcare teams and have evaluated the density of PAP through close supervision and interventions. The aim of the present study was to compare the density, quality, and cost of PAP before and after an intervention implemented at our hospital in order to increase the quality of PAP. METHODS: PAP was monitored using a form prepared in line with the international guidelines, which was completed by the infection control nurse under the supervision of the infectious diseases specialist. In order to reduce the frequent errors in our PAP procedures, an intervention was implemented, and the period before this intervention (January-April 2011) was compared with the post-intervention period 1 year later (January-April 2012). The density of PAP was calculated according to the Anatomical Therapeutic Chemical classification/defined daily dose (ATC/DDD) methodology. RESULTS: A total of 2398 patients received PAP during this period. The most frequently used antibiotic before and after the intervention was cefazolin. Its use further increased after the intervention (p<0.001). After the intervention, the ratio of the correct timing of the first antibiotic dose increased from 91.7% to 99.0% (p<0.001), while the excessively long administration of PAP was reduced from 77.0% to 44.7% (p<0.001). The ratio of full compliance with the guidelines increased from 15.5% to 40.2% (p<0.001) and the rate of surgical site infections dropped from 18.5% to 12.0%. The density of antibiotic use dropped from 305.7 DDD/100 procedures=3.1 DDD/procedure to 162.1 DDD/100 procedures=1.6 DDD/procedure. CONCLUSION: The quality of PAP may be improved through better compliance with healthcare guidelines, close supervision, and training activities. Also, surgical site infections and the cost of PAP may be reduced through more appropriate antibiotic use, thus contributing to the national healthcare budget.

HBsAg, anti-HCV, anti-HIV 1/2 and syphilis seroprevalence in healthy volunteer blood donors in southeastern Anatolia.

INTRODUCTION: This study investigated the seroprevalence of hepatitis B virus surface antigen (HBsAg), antibody against hepatitis C virus (anti-HCV), antibody against human immunodeficiency virus type 1/2 (anti-HIV 1/2), and antibody against Treponema pallidum (anti-Treponemal or syphilis antibody) in healthy volunteer blood donors, and assessed their distribution according to the years and genders. METHODOLOGY: HBsAg, anti-HCV, anti-HIV ½, and syphilis screening results of a total of 266,035 healthy volunteer blood donors who had been admitted for blood donation to the Regional Blood Center of Dicle University Hospital between January 2000 and December 2010 were evaluated, retrospectively. HBsAg, anti-HCV, and anti-HIV 1/2 screening were performed using a fully automated device with the microparticle enzyme immunoassay method (MEIA). Syphilis screening was performed by Rapid Plasma Reagin (RPR) carbon test between January 2000 and December 2009, and by using a fully automated device with the MEIA method between January 2010 and December 2010. RESULTS: Of 266,035 healthy volunteer blood donors, 259,384 (97.5%) were male and 6,651 (2.5%) were female. Statistically, there was not any significant difference between male and female genders for HBsAg, anti-HCV and syphilis seropositivities (P = 0.729, P = 0.748, and P = 0.861, respectively). HBsAg was found to be positive in 8,422 (3.17%), anti-HCV in 1,703 (0.64%), anti-HIV 1/2 in one (0.0004%) of 266,035 healthy volunteer blood donors, and syphilis antibody with RPR in 166 (0.07%) of 246,341 healthy volunteer blood donors. CONCLUSION: Blood donor forms should be carefully tailored to improve the identification of possible risks of transfusion-transmitted infections.

Carbapenem resistance in Acinetobacter baumannii: where is it heading?

In the context of the substantial increase in antibiotic resistance rates of Acinetobacter baumannii, we aimed to evaluate the susceptibility rate changes of A. baumannii strains for carbapenems. A. baumannii strains isolated from patients diagnosed with healthcare-associated infections between 2007-2010 were included. A total of 127 A. baumannii strains [53 (42%) from the intensive care unit and 74 (58%) from the non-intensive care unit] were isolated. Conventional methods and an automated microbiology system were used for identification. Susceptibility testing was studied by Kirby-Bauer disk diffusion method. In 2007, five of 26 strains, in 2008, 18 of 31, in 2009, 10 of 35, in 2010, and 20 of 35 were obtained from intensive care unit patients. The susceptibility rate for imipenem was 50% in 2007 but 20% in 2010, while for meropenem it was 55% in 2007 but 12% in 2010. Prevention and control of antibiotic resistance among Acinetobacter species needs antibiotic usage restrictions and infection control precautions.

Assessment of methicillin and clindamycin resistance patterns in Staphylococcus aureus isolated from a tertiary hospital in Turkey.

In order to detect the methicillin susceptibility and determine the prevalence of constitutive and inducible clindamycin resistance in Staphylococcus aureus strains, a total of 254 S. aureus isolates, including 139 (54.7%) methicillin-sensitive and 115 (45.3%) methicillin-resistant, were tested for clindamycin and erythromycin by Kirby-Bauer disk diffusion method. The disk diffusion induction test or D-test was performed on erythromycin-resistant and clindamycin-sensitive strains using the disk diffusion method. The erythromycin-resistant and clindamycin-sensitive strains with a D-shaped zone around the clindamycin disk were considered positive for inducible clindamycin resistance. If a strain was found to be both erythromycin-resistant and clindamycin-resistant, it was considered to have constitutive clindamycin resistance. Overall, ten (3.9%) strains, including two methicillin-resistant S. aureus and eight methicillin-sensitive S. aureus, were found to be erythromycin-resistant and clindamycin-sensitive according to the disk diffusion method and all of these strains showed inducible clindamycin resistance by the D-test method. Constitutive clindamycin resistance was detected in 100 of all MRSA strains. In conclusion, the presence of inducible clindamycin-resistant strains may lead to clindamycin treatment failure in patients with S. aureus infection. The D-test method should be used for antimicrobial susceptibility testing of clindamycin.