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Natural transformation was performed using the amplified fragment of the gyrA and gyrB gene as donor DNA. The amino acid sequences of GyrA and GyrB were determined by DNA sequencing of the gyrA and gyrB genes.
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Clostridium difficile is a Gram-positive spore forming anaerobic bacterium, often associated with nosocomial diarrhea and pseudomembranous colitis. The acquisition of this organism occurs primarily in hospitals through accidental ingestion of spores, and its establishment and proliferation in the colon results from the removal of members of the normal intestinal flora during or after antibiotic therapy. In this study, stool samples from patients admitted to the University Hospital Clementino Fraga Filho (HUCCF/UFRJ) were screened for C. difficile toxins with an ELISA test and cultured with standard techniques for C. difficile isolation. A total of 74 stool samples were collected from patients undergoing antibiotic therapy between August 2009 and November 2010, only two (2.7%) were positive in the ELISA test and culture. A third isolate was obtained from a negative ELISA test sample. All cases of CDI were identified in patients with acute lymphoid or myeloid leukemia. Genotypic and phenotypic characterization showed that all strains carried toxins A and B genes, and belonged to PCR-ribotypes 014, 043 and 046. The isolated strains were sensitive to metronidazole and vancomycin, and resistant to ciprofloxacin and levofloxacin. Resistance to moxifloxacin, was present in the strain from PCR-ribotype 014, that showed an amino acid substitution in gyrB gene (Asp 426 → Asn). This is the first time that this mutation in a PCR-ribotype 014 strain has been described in Brazil.
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To study the relative frequency of bacterial isolates cultured from community-acquired foot infections and assess their comparative in vitro susceptibility to sparfloxacin, levofloxacin, and eight other commonly used oral antimicrobial agents.
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A cross-sectional study was conducted on children aged 7 to 19 years from December 2011 to November 2012. Nasopharyngeal swabs were plated onto brain heart infusion agar plates with 5% sheep blood and 4µg/ml of gentamycin. Antimicrobial susceptibility profiles were determined on Mueller-Hinton agar in accordance with CLSI. S. pneumoniae strains were investigated for the presence of the most common pneumococcal serotypes using a multiplex polymerase chain reaction.
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Stenotrophomonas maltophilia is an important pathogen in healthcare-associated infections. S. maltophilia may contain Smqnr, a quinolone resistance gene encoding the pentapeptide repeat protein, which confers low-level quinolone resistance upon expression in a heterologous host. We investigated the prevalence of Smqnr and plasmid-mediated quinolone resistance (PMQR) determinants in S. maltophilia isolates from Japan. A total of 181 consecutive and nonduplicate clinical isolates of S. maltophilia were collected from four areas of Japan. The antimicrobial susceptibility profiles for these strains were determined. PCR was conducted for Smqnr and PMQR genes, including qnrA, qnrB, qnrC, qnrS, aac(6')-Ib and qepA. PCR products for Smqnr and aac(6')-Ib were sequenced. For the S. maltophilia isolates containing Smqnr, pulsed-field gel electrophoresis (PFGE) was performed using XbaI. Resistance rates to ceftazidime, levofloxacin, trimethoprim-sulfamethoxazole, chloramphenicol and minocycline were 67.4%, 6.1%, 17.7%, 8.8% and 0%, respectively. The minimum inhibitory concentration required to inhibit the growth of 50% and 90% of organisms were 0.5 and 2 mg/L for moxifloxacin but 1 and 4 mg/L for levofloxacin, respectively. Smqnr was detected in 104 of the 181 S. maltophilia isolates (57.5%), and the most frequent was Smqnr6, followed by Smqnr8 and Smqnr11. Eleven novel variants from Smqnr48 to Smqnr58 were detected. The 24 Smqnr-containing S. maltophilia isolates were typed by PFGE and divided into 21 unique types. Nine S. maltophilia isolates (5.0%) carried aac(6')-Ib-cr. No qnr or qepA genes were detected. This study describes a high prevalence of Smqnr and novel variants of Smqnr among S. maltophilia from Japan. Continuous antimicrobial surveillance and further molecular epidemiological studies on quinolone resistance in S. maltophilia are needed.
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Women (aged ≥18 years) with uPID (defined as PID with no pelvic or tubo-ovarian abscess on pelvic ultrasonography and at laparoscopic examination) and not requiring intravenous treatment.
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Retrospective, clinical laboratory study of antibiotic susceptibility among keratitis isolates.
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An eight-year longitudinal, retrospective chart review was performed on all culture-positive hand infections encountered by an urban hospital from 2005 to 2012. The proportions of all major organisms were calculated for each year. Methicillin-resistant Staphylococcus aureus infections were additionally analyzed for antibiotic sensitivity.
In vitro antituberculous activity of OFLX and LVFX against multidrug-resistant Keflex Antibiotic 500mg strains of Mycobacterium tuberculosis isolated from 46 patients with pulmonary tuberculosis and a retropective clinical analysis of 45 patients were investigated.
A serious problem confronting clinical laboratories and hospital formulary practices is the delayed availability of approved, commercially prepared susceptibility test reagents for newer antimicrobials. A current example is gatifloxacin, a new 8-methoxy fluoroquinolone with expanded potency against many Gram-positive pathogens. This study addresses the use of "surrogate marker" fluoroquinolones to predict susceptibility for gatifloxacin. Reference broth microdilution MIC results for 29,632 strains isolated in United States medical centers (SENTRY Antimicrobial Surveillance Program, 1997-99) were used: staphylococci (9,940 strains), enterococci (2,570), Streptococcus pneumoniae (3,784), Enterobacteriaceae (10,670) and Pseudomonas aeruginosa (2,668). Gatifloxacin interpretation categories were compared to those of ciprofloxacin and levofloxacin by regression statistics and error rate bounding analyses. For the Enterobacteriaceae, the absolute categorical agreement was 97.9 to 98.7% (false-susceptible or very-major error [VME], 0.03%-0.1%) for comparisons of both ciprofloxacin and levofloxacin with gatifloxacin. P. aeruginosa testing Antirobe 75 Mg Cats was more problematic (higher minor error rates), but acceptable at 0.6% to 1.1% VME and a 85.7% to 89.9% overall agreement. Ciprofloxacin results used to predict gatifloxacin in Gram-positive species was almost without VME (0.0%-0.2%) because gatifloxacin was significantly superior against these species, especially for S. pneumoniae, where gatifloxacin (MIC(90,) 0.5 microg/ml) was fourfold more potent than levofloxacin (MIC(90,) 2 microg/ml). The preferred gatifloxacin predictor drug was ciprofloxacin for all species except S. pneumoniae and P. aeruginosa, where levofloxacin results had a slightly greater predictive value. Susceptibility testing results for selected currently available fluoroquinolones can be used to predict susceptibility to gatifloxacin with high confidence. Many Gram-positive cocci, however, will be categorized as false-resistant by this interim method since gatifloxacin has a 11% to 34% wider spectrum of activity compared to ciprofloxacin when testing staphylococci and enterococci. Clinical laboratories can reliably use these suggested "surrogate markers" until reliable tests for gatifloxacin become available.
No significant differences were seen between the two groups regarding age, sex, smoking, alcohol intake, underlying diseases, or community/hospital acquisition. The time from onset of LD symptoms until the initiation of antibiotic treatment was 78.5 h and 92.7 h in groups 1 and 2, respectively (p = Metronidazole Online 0.1). Time to apyrexia was significantly longer in the macrolide group (77.1 h vs 48 h for groups 1 and 2, respectively; p = 0.000). There were no differences according to radiology, clinical complications, or mortality. Nevertheless, a trend to a longer hospital stay was observed in the macrolide group (9.9 days vs 7.6 days in groups 1 and 2, respectively; p = 0.09).
Invasive upper urinary tract procedures such as retrograde pyelography (RP) or Sefdin Capsule Use single (S-J) or double J (D-J) stenting are commonly performed to assess or treat ureteral strictures. Urinary tract infection (UTI) can result after such procedures, and prophylactic antimicrobial administration (PAA) may be necessary. This study investigated infectious complications and risk factors, focusing on PAA.
Mutations in the topoisomerase type II enzymes account for fluoroquinolone resistance in Streptococcus pneumoniae. These mutations can arise spontaneously or be transferred by intraspecies or interspecies recombination, primarily with viridans streptococci. We analyzed the nucleotide sequences of the quinolone resistance-determining regions of 49 invasive levofloxacin-resistant pneumococcal isolates and did not Suprax Drug Classification find any evidence for interspecies recombination.
To test the efficacy of rabeprazole, levofloxacin and rifabutin triple therapy vs. quadruple therapy for the second-line treatment of Cyanobacteria Erythromycin Dosage Helicobacter pylori infection.
The mechanisms contributing to persistence of coagulase-negative staphylococci are diverse; to better understanding of their dynamics, the characterization of nosocomial isolates is needed. Our aim was to characterize phenotypic and molecular characteristics of Staphylococcus epidermidis and Staphylococcus haemolyticus human blood isolates from two tertiary care hospitals in Mexico, the Hospital Universitario in Monterrey and the Hospital Civil in Guadalajara. Antimicrobial susceptibility was determined. Biofilm formation was assessed by crystal violet staining. Detection of the ica operon and Staphylococcal Cassette Chromosome mec typing were performed by PCR. Clonal relatedness was determined by Pulsed-fiel gel electrophoresis and Multi locus sequence typing. Methicillin-resistance was 85.5% and 93.2% for S. epidermidis and S. haemolyticus, respectively. Both species showed resistance > Alfoxil 1g Tablet 70% to norfloxacin, clindamycin, levofloxacin, trimethoprim/sulfamethoxazole, and erythromycin. Three S. epidermidis and two S. haemolyticus isolates were linezolid-resistant (one isolate of each species was cfr+). Most isolates of both species were strong biofilm producers (92.8% of S. epidermidis and 72.9% of S. haemolyticus). The ica operon was amplified in 36 (43.4%) S. epidermidis isolates. SCCmec type IV was found in 47.2% of the S. epidermidis isolates and SCCmec type V in 14.5% of S. haemolyticus isolates. No clonal relatedness was found in either species. Resistance to clindamycin, levofloxacin, erythromycin, oxacillin, and cefoxitin was associated with biofilm production for both species (p<0.05). A G2576T mutation in 23S rRNA gene was detected in an S. haemolyticus linezolid-resistant isolate. All linezolid-resistant S. epidermidis isolates belonged to ST23; isolate with SCCmec type IV belonged to ST7, and isolate with SCCmec type III belonged to ST2. This is the first report of ST7 in Mexico. There was a high genetic diversity in both species, though both species shared characteristics that may contibute to virulence.
Streptococcus pneumoniae causes substantial morbidity and mortality worldwide. Because only limited data are available for the antibiotic resistance patterns and seroepidemiology of invasive S. pneumoniae isolates in Taiwanese children, this national surveillance of invasive pneumococcal infections in children was conducted during a 5-year period. Invasive isolates of S. pneumoniae were obtained from sterile sites (yielding blood and cerebrospinal, pleural, and intra-articular fluids) in children (aged < or =14 years) at a total of 40 regional hospitals and medical centers distributed throughout Taiwan. The collection period was between July 1999 and June 2004, with a total of 286 isolates (including 30 cerebrospinal fluids) collected. All the samples were sent to the Center for Disease Control in Taipei for serotyping and susceptibility testing. Of the 286 S. pneumoniae isolates studied, the 5 most common serotypes were 14 (28.3%), 23F (21.0%), 6B (17.1%), 19F (13.6%), and 3 (4.9%). Intermediate- and high-level penicillin resistance was determined for 50.7% and 25.5% of the isolates, respectively. Isolate resistance was demonstrated to erythromycin (93%), tetracycline (82.2%), trimethoprim/sulfamethoxazole (79.4%), cefotaxime (11.2%), and levofloxacin (0.3%). Multiple drug resistance was found for each serotype, but mostly in types 14, 23F, 6B, and 19F. Overall, 85.0% of the serotypes, 90.8% of the penicillin-nonsusceptible S. pneumoniae (PNSSP), and 90.1% of the multiple drug-resistant (MDR) isolates were covered by the heptavalent pneumococcal conjugated vaccine (PCV7). In this study, we found a diverse pulse-field gel electrophoresis pattern among MDR isolates: a high prevalence of drug resistance and a continued increasing trend in penicillin resistance among nationwide pneumococcal Lagatrim Forte Dosage isolates from children in Taiwan. The highest prevalence of invasive pneumococcal disease was in children aged 2 to 5 years, and the highest PNSSP prevalence and highest PCV7 coverage were in children aged <2 years. In terms of reducing the risk of invasive pneumococcal illness in Taiwan, the use of PCV7 is likely to have a beneficial effect similar to that obtained in countries that have used it.
The nosocomial infection in our hospital caused by Stenotrophomonas maltophilia seemed to be related with severe primary disease and Cefdinir Antibiotics the use of Imipenem/cilastatin sodium. The newly developed fluoroquinolones possessed powerful antibacterial potency on Stenotrophomonas maltophilia found in nosocomial infection.
Legionnaire's disease (LD) manifests most commonly as an atypical community acquired pneumonia (CAP) with systemic extrapulmonary manifestations. Disorders associated with impaired cell mediated immunity (CMI) are particularly predisposed to LD. Hairy cell leukemia (HCL) is a rare B-cell lymphoproliferative leukemia associated with decreased CMI. LD has only rarely been reported in HCL. We present a most interesting case of persistent LD in a elderly male with HCL who required prolonged antibiotic therapy.
All inpatients who were dispensed oral levofloxacin from July 1, 1999, to June 30, 2001, were included. Coadministration was defined by documented administration of any DTCC within 2 hours of levofloxacin. Complete coadministration was defined as coadministration complicating every dose of a course of levofloxacin.
All antimicrobials showed a WT distribution, although the width varied from 2 two-fold dilutions to 8 dilutions, depending on antibiotic class. The ECOFFs determined were 1.0 mg/L for ciprofloxacin, 0.50 mg/L for levofloxacin, 1.0 mg/L for moxifloxacin, 1.0 mg/L for erythromycin, 1.0 mg/L for azithromycin, 0.50 mg/L for clarithromycin, 1.0 mg/L for cefotaxime, 0.032 mg/L for rifampicin, 16 mg/L for tigecycline, and 8 mg/L for doxycycline.