1028 COMPREHENSIVE KEY 



Small, smooth, raised, entire, pearly colonies on meat infusion agar; medium dis- 

 colored; litmus milk alkaline in 1 to 2 days; cause bronchopneumonia in rodents 

 and sometimes associated with canine distemper Bordetella p. 402 



Not as above 127 



127. Agar digested 128 



Agar not digested 129 



128. Alginates are metabolized; flagella polar Alginomonas p. 202 



(See also Pseudomonas gelatica.) 

 Alginate metabolism not recorded; flagella peritrichous .... Agarbacterium p. 322 



129. Obligate halophiles, requiring 20 to 30 per cent salt for growth 



Halobacteriinn p. 207 

 Not as above 130 



130. Alginates metabolized; flagella polar Alginomonas p. 202 



Not as above 131 



131. Organisms found growing in water among decomposing plant tissue; produce a charac- 



teristic lobed gelatinous zoogloea in which the cells are well isolated from each 

 other; produce cartilaginous colonies on agar Zoogloea p. 206 



Cells actively motile, by means of polar flagella; deposit sulfur internally when grow- 

 ing in the presence of hydrogen sulfide Thiospira p. 82 



Note: It is doubtful whether this genus should appear under aerobic organisms. 



Not as above 132 



132. Flagella polar 133 



Flagella peritrichous 135 



133. Organisms will grow in a mineral salts medium using CO2 as the sole source of car- 



bon and will oxidize hydrogen Hydrogenomonas p. 75 



Rods 0.5 by 1 to 2 microns; gelatin liquefied; nitrites and gas produced from nitrates; 

 starch hydrolj^zed; lipolytic; will grow autotrophically, oxidizing thiosulfate to 

 sulfate and tetrathionate with an increase in pH. Sulfur is not precipitated 



Thiobacillus p. 83 

 Not as above 134 



134. Organisms cause disintegration of filter paper when growing in 0.5 per cent peptone 



water Cellulonionas p. 601 



(See also Pseudomonas mira.) 



Not as above Pseudomonas p. 89 



(See also Agrobacterium stellulatum, A. radiobacter, Xanihomonas panici, X. rnbri- 

 subalbicans, X. cannae, X. zingiberi and Rhizobhun japonicum.) 



135. Litmus milk alkaline Alcaligenes p. 297 



(See also Agrobacterium radiobacter and RJiizobium spp.) 

 Litmus milk acid or unchanged Achromobacter p. 300 



