FAMILY XEISSERIACEAE 



303 



from alveolar pyorrhea, 5 from amniotic 

 fluid, 2 from abscesses and pulmonary 

 congestion and one from the buccal 

 cavity of a normal rabbit. Found in 

 suppurative lesions or pus. It may oc- 

 casionall}' be pathogenic and invade the 

 tissues, causing suppurations, alone or 

 in association with other pyogenic or- 

 ganisms. 



Habitat : Normally a harmless parasite 

 found in natural cavities of man and 

 animals, especially the mouth and digest- 

 ive tract. 



la. Veillo7ieila parvula var. minima 

 Prevot. {Staphylococcus minimus Gio- 

 clli, Boll. R. Accad. Med. di Genova, 

 1907; Abst. in Cent. f. Bakt., I Abt., 

 Ilef., 4-'-, 1908-09, 595; Micrococcus mini- 

 mus Bergey et al.. Manual, 1st ed., 1923, 

 69; Prevot, Ann. Sci. Nat., Ser. Bot., 

 15, 1933, 125.) From Latin, minimus, 

 smallest. 



Differs from VeillonelUi parvula only 

 in its slightly smaller size (0.2 to 0.3 mi- 

 cron). Growth only at 37°C. Nogrowth 

 ongelatin. Growthonthe wall of the cul- 

 ture tube in fine flakes, not clouding the 

 medium, and no plasmolysis in a 5 per 

 cent salt solution. 



Source : Isolated from a periuterine 

 abscess. 



lb. Veillonella parvula var. branhamii 

 Prevot. (Anaerobic micrococcus, Bran- 

 ham, Jour. Inf. Dis., 41, 1927, 203; ibid., 

 42, 1928, 230; Micrococcus branhamii 

 Bergey et al.. Manual, 3rd ed., 1930, 92; 

 Prevot, Ann. Sci. Nat., Ser. Bot., 15, 

 1933, 126.) Named for Dr. Sara E. 

 Branham, of the National Institute of 

 Health, Washington, D. C. 



Serologically distinct from Veillonella 

 parvula. One strain liquefied gelatin 

 slowly. 



Source : Isolated from nasal washings 

 in two cases of infiuenza. 



Ic. Veillonella parvula var. thomsonii 

 Prevot. (Anaerobic diplococcus, Thom- 

 son, Jour. Trop. Med. and Hyg., 26, 1923, 



227 and Ann. Pickett-Thomson Res. 

 Lab., ;, 1924-25, 105 and 164; Prevot, 

 Ann. Sci. Nat., Ser. Bot., 15, 1933, 126; 

 Micrococcus thomsoni Hauduroy et al., 

 Diet. d. Bact. Path., 1937, 283.) Named 

 for Dr. David Thomson of London, 

 England. 



Differs but slightly from Veillonella 

 parvula in that it requires some accessory 

 factor of growth found in serum or similar 

 body fluids, testicular agar and the like. 



Source : Found in the throat in measles 

 and scarlet fever. 



2. Veillonella gazogenes (Hall and 

 Howitt) Murray. {Micrococcus gazo- 

 genes alcalescens anaerobius Lewkowicz, 

 Arch. Med. Exp., 18, 1901, 633; Micro- 

 coccus gazogenes Hall and Howitt, 

 Jour. Inf. Dis., 37, 1925, 112; not Micro- 

 coccus gazogenes Choukevitch, Ann. 

 Inst. Pasteur, 25, 1911, 356; Veillonella 

 alcalescens Prevot, Ann. Sci. Nat., S6r. 

 Bot., 15, 1933, 127; Micrococcus alca- 

 lescens Hauduroy et al.. Diet. d. Bact. 

 Path., 1937, 274; Murray, in Manual, 

 5th ed., 1939, 287.) From Latin, the gas- 

 producing Veillonella. 



The species name gazogenes as given by 

 Hall and Howitt is well established in the 

 literature for this organism. It is valid 

 under the rules when the organism is 

 placed in a new genus {Veillonella) in 

 spite of the earlier use of Micrococcus 

 gazogenes by Choukevitch for a different 

 organism. 



Spheres : 0.3 to 0.7 micron, average 0.4 

 micron, occurring in irregular masses, 

 rarely in pairs, short chains or singly. 

 Gram-negative. 



Gelatin: No liquefaction. 



Deep agar colonies : At first punctiform , 

 becoming lenticular. Gas bubbles ap- 

 pear after 16 to 18 hours. 



Blood agar plate : Minute colonies. 

 Non-hemolytic. Several strains show 

 greenish colonies. 



Peptone broth: Gas produced. Broth 

 becomes slightly alkaline. 



Indole not formed. 



