TABLE 3.

Numbers of vegetative bacteria and heat-resistant bacteria (spores) intimately associated with tissues over a time course of infection with C. difficile B1

Time postinfection (h)	No. of viable bacteria recovered
	Upper small bowel		Lower small bowel		Cecum		Colon
	Vegetative cells	Spores	Vegetative cells	Spores	Vegetative cells	Spores	Vegetative cells	Spores
28	8.41 × 104	8.6 × 101	1.19 × 104	9.8 × 102	7.83 × 104	NDa	1.50 × 103	ND
33	1.35 × 105	1.04 × 104	1.4 × 106	9.3 × 104	3.18 × 106	1.7 × 105	3.57 × 105	3.22 × 104

^aND, not determined.