“…Klinge (1959~) reviewed the modifications of this method and discussed the results obtained by their use. Schultze (1910) , Kramer (1912), Loele (1929), Frei, Riedmiiller & Almasy (1934), Gordon & McLeod (1928), Kovacs (1956), Gaby & Hadley (1957), Gaby & Free (1958) and Klinge (1959a) obtained a positive oxidase or cytochrome oxidase reaction with Pseudomonas. Lutz, Schaeffer & Hofferer (1958) and Kohler (1959) obtained negative results in some cases and felt that the test was not reliable.…”