TABLE 4.

Growth of selected field isolates from different host species in defined medium supplemented with pyruvate or fucose^a

Host species and genotype	Rfucose	Rpyruvate
Turkey
fucP positive	2.77 × 103	4.92 × 103
fucP negative	1.64 × 10°	5.35 × 102
Chicken
fucP positive	2.44 × 103	9.78 × 103
fucP negative	5.46 × 10−2	9.99 × 103
Sheep
fucP positive	1.86 × 103	1.08 × 103
fucP negative	1.00 × 10°b	1.93 × 107
Humanc
fucP positive	2.18 × 104	4.03 × 104
fucP negative	2.50 × 101	3.05 × 106

^aGenotypes were determined by PCR. R values were calculated as CFU ml⁻¹ with substrate divided by CFU ml⁻¹ in basal defined medium (see Materials and Methods).

^bGrowth with fucose was below the detection limit (<10¹ CFU ml⁻¹).

^cThe fucP-positive strain is ATCC BAA-223, and the fucP-negative strain is a clinical isolate from the United States.