the nosocomial infections, caused by multi-drug resistant bacteria, are the most important cause of mortality throughout the world. one important mechanism against beta-lactam antibiotics is the production of beta-lactamases. enterobacteriaceae and non-fermentative bacteria, like pseudomonas aeruginosa and acinetobacter baumannnii may produce these enzymes. currently, there is no vaccine to pre...

a total number of 259 gram negative bacteria (entero-bacteria) isolated during the years 1973-1974 was examined. these strains were isolated from sick children referred and or hospitalized in a children hospital in tehran. the strains consisted of ; 131e.coli, 52 salmonella, 40 klebsiella, 18 shigella, 13 proteus, 3 enterobacter and 2 citrobacter. sensitivity tests were performed according to t...

Chronic urinary tract infections are often caused by antibiotic resistant bacteria. In some of these cases, prediction of the most effective antibiotic (s) may urgently be needed. This can not be achieved unless the nature and patterns of the resistance to antibiotics among the pathogenic bacteria has been described earlier. The urine samples that reached the laboratory of Shaheed Mustafa K...

Antibacterial nanoagents with broad-spectrum antibacterial activities have emerged as an evolution of antibiotics. However, their bacteria-capturing capability and bacteria-killing efficiency remain insufficient for commercial implementation. Inspired by the hunting behavior spiders, here, a novel spiderweb-like nanoagent based on silver-adenine nanowires is designed to achieve high-efficiency ...

Antibiotic-resistant (ABR) bacteria develop when bacteria are exposed to antibiotics either during treatments in humans or animals or through environmental sources contaminated with antibiotic residues. Resistant bacteria selected by medical, agricultural, and industrial use spread globally through international travel, the export of animals and retail products, and the environment. It is essen...

Antimicrobials are heavily used in Chilean salmon aquaculture. We previously found significant differences in antimicrobial-resistant bacteria between sediments from an aquaculture and a non-aquaculture site. We now show that levels of antimicrobial resistance genes (ARG) are significantly higher in antimicrobial-selected marine bacteria than in unselected bacteria from these sites. While ARG i...