COMPREHENSIVE KEY 1027 



116. Chitin is hydrolyzed Beneckea p. 328 



Chit in not hydrolyzed 117 



117. Bioluminescent on media containing 3 per cent salt; maj' not be luminescent on 0.5 



per cent salt Pholobacteriuin p. 193 



Not as above 1 18 



118. Flagella polar Pseudomonas p. 89 



(See also Xunthouionas manihotis, X. protenmaculnns and Rhizobium meliloii (if 

 lactose negative).) 

 Flagella peritrichous 119 



119. Cause hyperplastic diseases of plants Agrobacterium p. 288 



{A. nibi, A. lumefaciens (if lactose negative) and A. pseudutsugae) 



Cause wilts or necrotic diseases of plants Erwinia p. 3^9 



{E. amylovora, E. tracheiphila and E. salicis (if lactose negative)) 



Not as above Achromobacter p. 300 



Note: Some anaerogenic paracolons terminate here (strains 33111, 29911 and 

 8911). See also anaerogenic strains of the Providence Group, Rome, 1953. 



120. Curved rods which transform completely into coccoid forms during growth of the col- 



ony. Rods elongate and divide. At the point of division the rods grow out at an angle 

 to the original axis and divide again at the angle when the cell has doubled its length. 

 This process continues until a colonj' is formed. Ultimately the rods transform com- 

 pletely into cocci Arthrobacter p. 605 



Note: The emphasis lies on the final transformation into cocci. Some authori- 

 ties may consider that limited true branching may occur. If this is admitted 

 the dividing line between Arthrobacter and Nocardia becomes very slim. The 

 author's observations of Arthrobacter globiforme fit the above statement, and 

 it is suggested that these criteria be adopted, true branching forms which 

 later disintegrate being assigned to Nocardia. 

 Organisms which will grow in a mineral salts medium using phenol as the sole source 

 of carbon; reduce nitrates with the liberation of gas, presumably nitrogen 



Mycoplaiia p. 204 

 Not as above 121 



121. Colonies yellow 122 



Colonies not yellow 126 



122. Agar hydrolyzed Agarbacterium p. 322 



Agar not hydrolyzed 123 



123. Organisms grow in a mineral salts base using CO2 as the sole source of carbon and 



oxidizing hydrogen Hydrogenomonas p. 75 



Not as above 124 



124. Flagella polar Xanthomonas p. 152 



(See also Pseudomonas lasia, P. cerevisiae, P. caudata, P. levistici, P. ochracea 

 and P. panicimiliacei .) 

 Flagella peritrichous 125 



125. Litmus milk strongly alkaline Alcaligenes p. 297 



(See also Flavobacterium harrisonii.) 

 Litmus milk acid or unchanged Flavobacterium p. 309 



126. Pleomorphic rods; do not grow on meat infusion agar; grow well in semisolid media 



containing horse, rabbit or human blood or other complex substances; rods and 

 coccoid forms predominate in culture; flagella polar; pathogenic to man; multiply 

 on erythrocytes and in fixed-tissue cells; transmitted through the sandfly Phleboto- 



mus verrucariim Bartonella p. 969 



Colonies mucoid, small, circular and translucent; organisms cause conjunctival foUi- 

 culosis in rabbits Noguchia p. 421 



