FAMILY_PARVOBACTERIACEAE 545 



FMIILY XI. PARVOBACTERIACEAE RAHN.* 



(Cent. f. Bakt., II Abt., 96, 1937, 281.) 



Small, motile or non-motile rods. Gram-negative. Some will grow on ordinary 

 media, but the majority either require or grow better on media containing body 

 fluids or growth-promoting substances. Some invade living tissues. Usually do 

 not liquefy gelatin. Xo visible gas formed in the fermention of carbohydrates. 

 Infection in some cases may take place by penetration of organisms through mucous 

 membranes or skin. Parasitic to pathogenic on w^arm-blooded animals, including 

 man. 



Key to the tribes of family Parvobacteriaceae, 



I. Usually grow on ordinary media. 



A. Aerobic to facultative anaerobic. 



1. Show bipolar staining. JMajority ferment carbohydrates. 



Tribe I. Pasteurelleae, p. 545. 



2, Do not show bipolar staining. None ferment carbohydrates. 



Tribe II. Brueelleae, p. 560. 



B, Aaaerobic, 



Tribe III. Bacteroideae, p. 564. 



II. On first isolation dependent on some factor or factors contained in blood or plant 



tissues. Aerobic to anaerobic. 



Tribe IV. Hemophileae, p. 584. 



THIBE I. PASTEURELLEAE CASTELLANI AND CHALMERS. 



(Man. Trop. Med., 3rd ed., 1919, 943.) 

 Small, motile or non-motile, ellipsoidal to elongated rods showing bipolar staining. 



Key to the genera of tribe Pasteurelleae. 



I. Milk not coagulated. 



A. Causes hemorrhagic septicemia, pseudotuberculosis, tularemia or plague. 



Genus I. Pasteur ella, p. 546. 



II. Milk coagulated slowly and sometimes digested. 

 A. Causes glanders or glanders-like infections. 



Genus II. Malleomyces, p. 5.54. 



III. Milk unchanged to slightly acid. 



A. Associated with actinomycosis in cattle and in man. 



Genus III. Actinobacillus, p. 556. 



''" Revised by Prof. E. G. D. ]\Iurray, ^IcGill University, Montreal, Canada with the 

 collaboration of Prof. Karl F. Mej'er, Hooper Foundation, San Francisco, California; 

 Prof. W. A. Hagan, Cornell University, Ithaca, New York; Dr. Alice C. Evans and 

 Dr. Margaret Pittman, National Institute of Health, Washington, D. C; Prof. I. F. 

 Huddleson, Michigan State College, East Lansing, Michigan; and others, December, 

 1938. 



