Table 1
Summary of cases reported previously and the present case of pseudomembranous colitis

Variable	Boaz et al. (2000) [3]	Kang et al. (2008) [4]	Present study
Patient (age/sex)	25/Female	64/Female	80/Male
Previous antibiotics	Clindamycin for dental infection (10 days) and ciprofloxacin after hospitalization (4 days)	Ceftriaxone for aneurysmal operation (11 days)	Ceftriaxone for wound management (8 days)
Laboratory finding
WBC (/mm3)	34,800	11,210	15,320
Albumin (g/dL)	3	1.9	2.1
C. difficile toxin assay	Negative	Negative	Negative
Serum CEA (ng/mL)	ND	5.6	15.94 (4.68 after treatment)
Ascite fluid analysis
WBC (/mm3)	34,000	800 (PMN, 30%)	6,800 (PMN, 85%)
Albumin (g/dL)	ND	1.8 (SAAG, 0.1)	1.3 (SAAG, 0.8)
CEA (ng/mL)	ND	70.1	19.21
Pleural fluid analysis	ND	Exudate	Transudate
Treatment	Oral vancomycin	Oral metronidazole	Oral metronidazole

WBC, white blood cell; CEA, carcinoembryonic antigen; C. difficile, Clostridium difficile; ND, no description; PMN, polymorphonuclear leukocyte; SAAG, serum ascites albumin gradient.