PNN - ID Review exam 2023 with 100% correct answers

Define: Minimum inhibitory concentration The minimum concentration of an antibiotic that inhibits growth of an organism for 24 hours. What is a broad spectrum antibiotic? Narrow spectrum? Broad = affects both GP and GN organisms. Narrow spectrum = only GP or GN, not both. What is the DOC for streptococcus? Penicillin family What kind of bacteria is strep. Pygogenes? GP, coccus, common pathogen for "strep throat" and cellulitis. What is group B strep? Strep. Agalactiae. GP. Normal flora of the vagina - not an issue for the patient, but can be for the baby. Common pathogen of neonatal infections. How do we manage a Group B Strep (GBS) positive female patient who is giving birth? a few weeks prior to delivery, swab to determine if patient is GBS positive or negative (whether she is colonized by this bacteria: streptococcus agalactiae). If GBS(+), then 24 hours prior to delivery, we give the mom IV ampicillin to prevent neonatal infections (neonatal meningitis/sepsis). What is Pneumococcus? Streptococcus pneumoniae. GP organism. Again, DOC for streptotoccus group is something from the penicillin family. This pathogen is the number 1 cause of many infections above the diaphragm: otitis media, sinusitis, pneumonia, meningitis. What is strep. Viridans? A bacterial part of the normal flora of the mouth/GI. We worry about dental infections, and possible endocarditis in patients that are high risk.