this study was undertaken to determine the antibiotic sensitivity of 686 strains of hemolytic streptococci isolated at the school of public health, divi­sion of streptococcal studies, to five antibiotics in vitro. all of the strains were sensitive to penicillin, erythromycin, chloramphenicol and ampicillin. 27 (4%) of the strains, were resistant to tetracyclin. the clinical implications of this...

resistance of streptococcus pneumoniae against penicillin is considered to be of great importance. while low-resistant strains could be treated by penicillin, treatment of highly resistant strains is very difficult and needs broad-spectrum antibiotics. this study was performed in imam khomeini medical center, tehran, iran, from 1999 to 2001 to evaluate pneumococcal resistance against penicillin...

conclusion prevalence of p. aeruginosa producing esbl and mdr strains from our clinical samples and environment is still low. results the highest resistance rates from the isolated p. aeruginosa were shown against piperacillin, imipenem, cefotaxime, ceftriaxone, gentamicin, ceftazidime, aztreonam, and ciprofloxacin, respectively. seven isolates (9.2%) were esbl producers. more than 30% of the i...

background & objectives:staphylococcus aureus is one of the major causes of nosocomial infections. recently, increase in its various drug-resistant strains, has increased health problems. incidence of vrsa (vancomycin resistant staphylococcus aureus) strains has created many concerns about the treatment of these bacterial infections. the aim of this study was to determine the frequency of staph...

background: treatment of cutaneous leishmaniasis (cl) is being faced with serious difficulties in fars province, due to emerging of resistance against meglumine antimonite (glucantime®). in this context, determining some biomarkers for drug sensitivity monitoring seems to be highly essential. different studies have been carried out to decipher the genes might be involved in antimony resistant p...

Background: The virulence of a pathogenic Vibrio cholerae is dependent on a discrete set of genetic determinants. In this study, we determined the distribution of virulence determinants among the clinical and environmental isolates of V. cholerae. Methods: The antibiotic resistance profiles of the isolates were determined using standard disk diffusion assay. PCR assay was performed to analyze t...

Strains of the food-borne pathogen Listeria (L.) monocytogenes have diverse virulence potential. This study focused on three outbreak strains: CC1 strain PF49 (serovar 4b) from a cheese-associated in Switzerland, clinical CC2 F80594 4b), and G6006 (CC3, serovar 1/2a), responsible for large gastroenteritis USA due to chocolate milk. We analysed genomes characterized vitro vivo. Whole-genome sequ...

background: the virulence of a pathogenic vibrio cholerae is dependent on a discrete set of genetic determinants. in this study, we determined the distribution of virulence determinants among the clinical and environmental isolates of v. cholerae. methods: the antibiotic resistance profiles of the isolates were determined using standard disk diffusion assay. pcr assay was performed to analyze t...

pseudomonas aeruginosa is an important life-threatening nosocomial pathogen and plays a prominent role in serious infections in burned patients. the current study was undertaken to characterize p. aeruginosa strains isolated from burned patients in tehran, iran. the study was conducted in a major burn center in tehran, iran in 2007. a total of seventy specimens obtained from different clinical ...