TABLE 2.

Comparison of patient 1's, patient 2's, and the homograft valve isolates with the type and clinical reference strains of O. turbata; C. hominis, and CDC group A-3

Characteristic	Isolate
	O. turbata ATCC 25835T	O. turbata clinical reference isolates (n = 4)	Patient 1's isolates and six homograft valve isolates (n = 10)	C. hominis DSM 9581T	C. hominis clinical reference isolate (n = 1)	CDC group A-3 clinical reference isolate (n = 1)	Patient 2's isolate and one homograft isolate (n = 2)
Pigment on HIA slants in 3 days	Yellow	Yellow	Yellow	Pale yellow	Pale yellow	Pale yellow	Pale yellow
Substrate hyphae	+a	100b	100	−	−	−	0
Fermentative acid production from l-rhamnose	−	0	0	+	+	+	100
Urease production (Christensen agar slant)	−	75	30	+ (−c)	+ (−c)	−	0
Gelatin liquefaction (14 days)	+	100	100	− (+c)	− (+c)	−	0
Hydrolysis of casein	−	100	100	−	−	−	0
Resistanced (MIC) to:
Amikacin (≥ 64 μg/ml)	+	75	100	+	+	+	100
Ampicillin (≥4 μg/ml)	+	100	100	+	+	+	100
Cefotaxime (≥64 μg/ml)	+	0	100	−	−	+	100
Ciprofloxacin (≥4 μg/ml)	−	100	100	−	−	+	100
Erythromycin (≥8 μg/ml)	−	25	100	−	−	+	100
SMX (>32 μg/ml)	+	100	100	+	+	+	100
TMP-SMX (>2 to 38 μg/ml)	−	50	100	+	+	+	100

^a+, positive; −, negative.

^bPercentage of the isolates that tested positive.

^cFunke et al. (6) described C. hominis as urease negative using Christensen broth and gelatin hydrolysis positive using the film strip method.

^dThe MIC breakpoints for resistance that were used are those of NCCLS (13).