A suitable liquid chromatography quadrupole time-of-flight mass spectrometric (LC-Q-TOF-MS) method was developed for separation and characterization of related substances in bacitracin test drug. The separation was performed on LiChrospher RP-18 column using methanol as mobile phase A and 0.2% ammonium acetate buffer solution as mobile phase B in gradient elution. A total of 12 related substanc...

The purpose of our study was to investigate the suitability of throat gargling with sterile saline as an alternative method to throat swabs for detection of group A beta- hemolytic streptococcus (GAS). Throat specimens were obtained from 601 cases belonging to different age groups. Sterile Dacron swabs and gargle residue were first streaked on the side of a 5% sheep blood agar plate to which a ...

Shrimp aquaculture environments are a natural reservoir of multiple antibiotic resistance genes (ARGs) due to the overuse antibiotics. Nowadays, prevalence these kinds emerging contaminants in shrimp is still unclear. In this study, high-throughput sequencing techniques were used analyze distribution ARGs and mobile genetic elements (MGEs), bacterial communities, their correlations water sedime...

BACKGROUND The aim of this study was to evaluate the antibiotic susceptibility of Group A streptococcus (GAS) to antibiotics usually used in Iran for treatment of GAS pharyngitis in children. MATERIALS AND METHODS From 2011 to 2013, children 3-15 years of age with acute tonsillopharyngitis who attended Mofid Children's Hospital clinics and emergency ward and did not meet the exclusion criteri...

In this study, the antimicrobial susceptibilities and presence of plasmids in 7 probiotics strains which had been isolated from the fermented milk were determined. Resistance to 8 commonly used antibiotics $lactans (penicillin, ampicilin), gram positive spectrum (vanomycin), broad spectrum (rifampin, trimethoprim) and aminogycosides (kanamycin, streptomycin, and bacitracin) was assessed by disk...