and bacteroides. this may consist of a broad spectrum antibiotic; such as piperacillin-tazobactam, ampicillin-sulbactam, ticarcillin-clavulanate (timentin), a third generation cephalosporin (e.g.ceftriaxone) or a quinolone antibiotic (such as ciprofloxacin) and anaerobic bacteria coverage, such as metronidazole. for penicillin allergic people, aztreonam or a quinolone with metronidazole may be used. in cases of severe inflammation, shock, or if the person has higher risk for general anesthesia (required for cholecystectomy), an interventional radiologist may insert a percutaneous drainage catheter into the gallbladder (percutaneous cholecystostomy tube) and treat the person with antibiotics until the acute inflammation resolves. a cholecystectomy may then be warranted if the person's condition improves. homeopathic approaches to treating cholecystitis have not been validated by evidence and should not be used in place of surgery. epidemiology cholecystitis accounts for 3–10% of cases of abdominal pain worldwide. cholecystitis caused an estimated 651,829 emergency department visits and 389,180 hospital admissions in the us in 2012. the 2012 us mortality rate was 0.7 per 100,000 people. the frequency of cholecystitis is highest in people age 50–69 years old.