Antibiotics should be used only for select patients and not routinely in acute uncomplicated<unk> 
Antibiotics are aimed at treating Gram Negative organisms and Anaerobes (Enterobacteriaceae, Pseudomonas aeruginosa, Bacteriodes sp., and Enterococci)
Current research suggests that antibiotics may not be necessary in uncomplicated<unk>  if patient receives sufficient bowel rest in coordination with medicine observation and close follow up. At the very least, shorter durations (5 days) of antibiotics should be prefered compared to historic 10-14day courses
Modified Hinchey Class 0
Liquid diet and bowel rest (low fiber foods) are most important
Antibiotic
Options:
Metronidazole 500mg PO Q8hrs AND Ciprofloxacin 500mg PO BID x5days
Amoxicillin/Clavulanate 875/125 PO Q8hrs x5days (or Augmentin XR 2 tablets BID [each tablet 1gm amoxicillin 62.5mg clavulanate])
Trimethoprim/Sulfamethoxazole, one double-strength tablet bid, and Metronidazole 500 mg Q8h
Moxifloxacin 400mg PO QDaily
Defined as having a  phlegmon, abscess, stricture, obstruction, fistula, or perforation (i.e. Hinchey Stages I-IV; see Evaluation section)
Bowel rest in coordination with antibiotics
Surgical consult for drainage of abscess or further surgical intervention
Diverticulitis
Ischemic colitis
Kidney stone
Appendicitis
UTI
Appendicitis 
Pyelonephritis
Uvulitis