Distribution of initial pathogen (gram-positive, gram-negative, polymicrobial, culture-negative) stratified by: (A) chronic antibiotic suppression (CAS) use vs. (B) not (No CAS). (C) Antibiotic distribution among patients treated with CAS. CAS, chronic antibiotic suppression: Gram-positive: 21 methicillin-sensitive Staphylococcus aureus, 7 methicillin-resistant Staphylococcus aureus, 2 Diphtheroids, 1 Enterococcus faecalis, 3 coagulase-negative staphylococcus. Gram-negative: 15 Pseudomonas aeruginosa, 6 Serratia marcescens, 4 Klebsiella pneumoniae, 2 Stenotrophomonas maltophilia, 1 Achromobacter xylosoxidans, 1 Acinetobacter baumannii complex, 1 Burkholderia cepacia complex, 1 Enterobacter cloacae, 1 Escherichia coli, 1 Serratia liquefaciens. No CAS: Not on Chronic Antibiotic Suppression:
Gram-positive: 7 methicillin-sensitive Staphylococcus aureus, 2 methicillin-resistant Staphylococcus aureus, 1 coagulase-negative staphylococcus, 1 Corynebacterium striatum, 1 Streptococcus viridans. Gram negative: 5 Serratia marcescens, 3 Pseudomonas aeruginosa, 2 Enterobacter cloacae, 2 Enterobacter aerogenes, 2 Stenotrophomonas maltophilia, 1 Acinetobacter baumannii complex, 1 Acinetobacter oitti, 1 Klebsiella pneumoniae