TABLE 1.

Phenotypic properties of Arcobacter species and the patient straina,^b

Characteristic	A. butzleri	A. cryaerophilus	A. nitrofigilis	A. skirrowii	Patient strain
Catalase activity	V	V	+	+	+
Nitrate reduction	+	+	+	+	+
Urease	−	−	+	−	−
H2S (TSI)	−	−	−	−	−
Hippurate hydrolysis	−	−	−	−	−
Indoxylacetate hydrolysis	+	+	+	+	+
Growth at 15°C	+	+	+	+	+
Growth at 25°C	+	+	+	+	+
Growth at 42°C	V	−	−	V	W
Growth in 1% glycine	−	V	−	− (Vc)	+
Growth on MacConkey agar	V	V	−	−	−
Susceptibility to nalidixic acid	V	V	S	S	R
Susceptibility to cephalothin	R	R	S	R (Sc)	S

^aAccording to Nachamkin (5).

^b+, positive reaction; −, negative reaction; TSI, triple sugar iron; W, weak reaction; V, variable reaction; S, susceptible; R, resistant.

^cAccording to Nachamkin (4).