Pseudomonas aeruginosa is an opportunistic pathogen that poses a threat in clinical settings. This study aimed to investigate the molecular characterization and epidemiology of fluoroquinolones (FQs) resistance in P. aeruginosa isolated from South China. A total of 256 P. aeruginosa strains isolated from outpatients, emergency patients and inpatients were collected from January 2010 to December...

China is one of the countries with the highest burdens of multidrug-resistant (MDR) and fluoroquinolone (FQ)-resistant tuberculosis (TB) globally. Nevertheless, knowledge about the prevalence and molecular characterization of FQ-resistant Mycobacterium tuberculosis isolates from this region remains scant. In this study, 138 M. tuberculosis isolates determined by the agar proportion susceptibili...

In a recently published article, Fukushima et al. (3) described a novel PCR-melting curve analysis (PCR-MCA) method for rapid screening of the most prevalent point mutations related to fluoroquinolone resistance in Streptococcus pneumoniae. In their study, they included 22 levofloxacin (LVX)-resistant strains and 50 LVX-susceptible isolates. None of the isolates in that study were shown to harb...

To assess the antimicrobial resistance of Neisseria gonorrhoeae isolated from 1993 through 1998 in Japan, susceptibility testing was conducted on 502 isolates. Selected isolates were characterized by auxotype and analysis for mutations within the quinolone resistance-determining region (QRDR) in the gyrA and parC genes, which confer fluoroquinolone resistance on the organism. Plasmid-mediated p...

This study was conducted to determine the species distribution, antimicrobial resistance pheno- and genotypes and virulence traits of mannitol-positive methicillin-resistant staphylococci (MRS) isolated from pigs in Nsukka agricultural zone, Nigeria. Twenty mannitol-positive methicillin-resistant coagulase-negative staphylococcal (MRCoNS) strains harboring the mecA gene were detected among the ...

The potential for genetic modification of biological warfare agents makes rapid identification of antibiotic resistant strains critical for the implementation of suitable infection control measures. The fluorinated quinolone, ciprofloxacin, is an antibiotic effective for treating bacterial infections by inhibiting the enzyme activity of the DNA type II topoisomerases DNA gyrase and topoisomeras...

Fourteen strains of S. Typhi (n=13) and S. Paratyphi A (n=1) resistant to ciprofloxacin were compared with 30 ciprofloxacin decreased-susceptibility strains on the basis of qnr plasmid analysis, and nucleotide substitutions at gyrA, gyrB, parC and parE. In ciprofloxacin-resistant strains, five S. Typhi and a single S. Paratyphi A showed triple mutations in gyrA (Ser83-->Phe, Asp87-->Asn, Glu133...

appearance of bacteria resistant to antibacterial agents puts physicians in trouble and threatens the health of the world. the rapid development of bacterial resistance in escherichia coli to ciprofloxacin makes difficult the treatment of infectious diseases. so, detection of the locations of possible mutations in gyrase a gene ( gyra ) in these mutants is very important to determine the mechan...

BACKGROUND & OBJECTIVES Infection with Salmonella enterica serovar Typhi (hereafter S. Typhi) is an important public health problem in India. There has been an increase in the number of reported clinical failures to ciprofloxacin treatment but the data on possible mechanism of failure are limited. One mechanism that has been widely reported and found associated with ciprofloxacin resistance, is...

Drug-resistant tuberculosis is a public health concern. TB that drug-resistant to rifampin and isoniazid known as MDR-TB, whereas XDR-TB MDR-TB also resistant second-line medicines, such fluoroquinolones (levofloxacin, ofloxacin, moxifloxacin). rifampin-resistant (RR-TB), of which 78 percent had multidrug-resistant (MDR-TB) (MDR-TB). Fluoroquinolones are class broad-spectrum antimicrobials have...