Antibiograms

Principles

Analyze and present data at least annually
Include only species with at least 30 isolates tested
Include diagnostic, not surveillance, isolates
Include results only for drugs that are routinely tested
Include the first isolate per patient in the period analyzed, irrespective of the body site from which the specimen was obtained or the antimicrobial susceptibility pattern
Calculate the percentage susceptible; do not include the percentage of isolates with intermediate susceptibility
For Streptococcus pneumoniae:
- Calculate and list both the percentage susceptible and the percentage of isolates with intermediate susceptibility for penicillin
- Calculate and list the percentage susceptible for cefotaxime or ceftriaxone using both the meningitis and nonmeningitis breakpoints
For viridans group streptococci, calculate and list both the percentage susceptible and the percentage of isolates with intermediate susceptibility for penicillin
For Staphylococcus aureus, calculate and list the percentage susceptible for all isolates, as well as for the subset of methicillin-resistance Staphylococcus aureus