These organisms are highly efficient at up-regulating or acquiring genes that code for mechanisms of antibiotic drug resistance ... ICUs in the United States are due to gram-negative organisms ...

Gregory Shwartzman described the phenomenon of local skin reactivity to culture filtrates of meningococci and of other gram-negative bacteria ... in part by a United States Public Health Service ...

Some gram-negative bacilli, or GNB, are inherently resistant to certain antibiotics. Others acquire resistance spontaneously ... to institution. In the United States, occurrence of ESBL production ...

Relationship between fluoroquinolone use and changes in susceptibility to fluoroquinolones of selected pathogens in 10 United States ... of gram-negative isolates to ciprofloxacin in a hospital ...