Abstract:
:Resistance of nosocomial and community-acquired pathogens to antimicrobial agents is a serious problem with significant clinical consequences. Microbiologic surveillance data, such as those provided by the National Nosocomial Infections Surveillance System, supply information on current nosocomial pathogens in the United States. Many species show resistance to commonly used antimicrobials and, in many cases, it is emerging resistance. Resistance in many gram-negative bacteria is caused by beta-lactamase production. Escherichia coli, the leading nosocomial pathogen, is capable of hyperproducing TEM-1 beta-lactamase. A novel form of resistance in Klebsiella pneumoniae and E. coli is caused by extended-spectrum cephalosporinases. Many Enterobacteriaceae can be induced to produce group 1 beta-lactamase by exposure to broad-spectrum cephalosporins and other beta-lactams. Thirty percent of Haemophilus influenzae isolates are resistant to ampicillin because of beta-lactamase production. Issues of concern in gram-positive species include multiple antimicrobial resistance in methicillin-resistant Staphylococcus aureus, enterococci, and coagulase-negative staphylococci, and increasing beta-lactam resistance in Streptococcus pneumoniae. To minimize the development of resistance, antimicrobials must be administered judiciously, and infection-control practices must be instituted and followed.
journal_name
Pharmacotherapyjournal_title
Pharmacotherapyauthors
Thornsberry Csubject
Has Abstractpub_date
1995-01-01 00:00:00pages
3S-8Sissue
1 Pt 2eissn
0277-0008issn
1875-9114journal_volume
15pub_type
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