Table 4.

Key and differential biochemical characteristics of Helicobacter species colonizing animalsCharacteristic

	H. acinonyx	H. bilis	H. bizzozeronii	H. cholecystus	H. hepaticus	H. muridarum	H. mustelae	H. nemestrinae	H. pametensis	H. rodentium	H. salomonis	H. trogontum
Catalase activity	+	+	+	+	+	+	+	+	+	+	+	+
Urease activity	+	+	+	-	+	+	+	+	-	-	+	+
Oxidase activity	+	+	+	+		+	+	+	+	Weak+	+	+
Alkaline phosphatase activity	+		+	+		+	+	+	+	-	+	-
γ-Glutamyl transpeptidase activity	+		+	-		+	+		-	-	+	+
H2Sproduction		+		-	+	-	-	-	-			-
Indoxyl acetate hydrolysis	-	-	+	-	+	+	+	-	-	-	+
Hippurate hydrolysis	-	-	-	-	-	-	-	-	-	-	-	-
Nitrate reduction	-	+	+	+	+	-	+	-	+	+	+	+
DNase activity			+					-			+
G + C content (mol%)	30					35	36	24	38