TABLE 1.

Characteristics which differentiate H. marmotae from other nongastric Helicobacter species^a

Taxon	Catalase production	Nitrate reduction	Alkaline phosphatase hydrolysis	Urease	Indoxyl acetate hydrolysis	γ-Glutamyl transpeptidase	Growth		Susceptibility to:		Periplasmic fibers	No. of flagella	Distribution of flagella	G+C content (mol%)
							At 42°C	With 1% glycine	Nalidixic acid (30-μg disk)	Cephalothin (30-μg disk)
H. marmotae	+ (5/5)	− (5/5)	+ (5/5)	+ (5/5)	− (5/5)	− (5/5)	− (5/5)	+ (5/5)	R (5/5)	R (5/5)	−	2	Bipolar	ND
H. canadensis	+	+	−	−	+	−	+	+	R	R	−	2	Bipolar	ND
H. rodentium	+	+	−	−	−	−	+	+	R	R	−	2	Bipolar	ND
H. pullorum	+	+	−	−	−	ND	+	−	R	S	−	1	Monopolar	34-35
H. fennelliae	+	−	+	−	+	−	−	+	S	S	−	2	Bipolar	35
H. trogontum	+	+	−	+	−	+	+	ND	R	R	+	5-7	Bipolar	ND
H. muridarum	+	−	+	+	+	+	−	−	R	R	+	10-14	Bipolar	34
H. hepaticus	+	+	−	+	+	−	−	+	R	R	−	2	Bipolar	ND
H. canis	−	−	+	−	+	+	+	−	S	I	−	2	Bipolar	48
H. bilis	+	+	−	+	−	+	+	+	R	R	+	3-4	Bipolar	ND
“H. rappini”	+	−	−	+	ND	+	+	−	R	R	+	10-20	Bipolar	34
H. cinaedi	+	+	−	−	−	−	−	+	S	I	−	1-2	Bipolar	37-38
H. pametensis	+	+	+	−	−	−	+	+	S	S	−	2	Bipolar	38
H. winghamensis	−	−	−	−	+	ND	−	ND	S	S	−	1-2	Bipolar	ND
H. mesocricatorum	+	+	+	−	ND	−	ND	−	S	R	−	2	Bipolar	ND
H. aurati	+	−	−	+	+	+	+	−	S	R	+	7-10	Bipolar	ND
H. typhlonius	+	+/−	−	−	−	−	+	+	S	R	−	1	Bipolar	ND
H. cholecystus	+	+	−	−	−	−	+	+	I	R	−	2	Bipolar	ND

^aData were obtained from references 12, 18, and 37. Symbols and abreviations: +, positive reaction; −, negative reaction; S, susceptible; R, resistant; I, intermediate; ND, not determined.