Occasionally pathogenic, invading the tis- sues, causing suppurations either alone or in association with other pyogenic organisms. Habitat: Found normally as a harmless parasite in the natural cavities, especially the mouths and digestive tracts, of man and other animals. la. Veillonella parvida var. minima Pr6- vot, 1933. {Staphylococcus minimus Gioelli, Boll. R. Accad. Med. di Genova, 1907; abst. in Cent. f. Bakt., I Abt., Ref., 4^, 1908-09, 595; Prevot, Ann. Sci. Nat., Ser. Bot., 15, 1933, 125.) mi'ni.ma. L. sup. adj. minimus smallest. Differs from Veillonella parvula only in that it is slightly smaller in size (0.2 to 0.3 micron). Growth only at 37° C. No growth on gelatin. Growth on the wall of the cul- ture tube in fine flakes, not clouding the medium. No plasmolysis in a 5 per cent salt solution. Source: Isolated from a periuterine ab- scess. lb. Veillonella parvula var. hranhamii Prevot, 1933. (Anaerobic micrococcus, Bran- ham, Jour. Inf. Dis., U, 1927, 203; also see ibid., 4^, 1928, 230; Micrococcus hranhamii Bergey et al., Manual, 3rd ed., 1930, 92; Prevot, Ann. Sci. Nat., Ser. Bot., 15, 1933, 126.) bran.ham'i.i. M.L. gen. noun hranhamii of Branham; named for Dr. Sara E. Bran- ham, an American bacteriologist who has made a special study of these organisms. Serologically distinct from Veillonella parvula. Gelatin slowly liquefied by one strain. Source: Isolated from nasal washings in two cases of influenza. Ic. Veillonella parvula var. thomsonii Prevot, 1933. (Anaerobic diplococcus, Thom- son, Jour. Trop. Med. and Hyg., 26, 1923, 227; also see Ann. Pickett-Thomson Res. Lab., /, 1924-25, 105 and 164; Prevot, Ann. Sci. Nat., Ser. Bot., 15, 1933, 126.) thorn. so'ni.i. M.L. gen. noun thomsonii of Thomson; named for Dr. David Thomson of London, England, the first to isolate this variety. Differs but slightly from Veillonella par- vula in that it requires some accessory growth factor found in serum or other body fluids or tissues. Source: Isolated from the throats of per- sons with measles or scarlet fever. 2. Veillonella alcalescens* Prevot, 1933. {Micrococcus gazogenes alcalescens anaerohius Lewkowicz, Arch. M^d. Expt., 13, 1901, 633; Micrococcus gazogenes Hall and Howitt, Jour. Inf. Dis., 37, 1925, 112; not Micrococcus gazogenes Choukevitch, Ann. Inst. Past., 25, 1911, 350; Prevot, Ann. Sci. Nat., S^r. Bot., 15, 1933, 127; Veillonella gazogenes Murray in. Manual, 5th ed., 1939, 287.) al.ca.les'cens. M.L. v. alcalesco to make alkaline; M.L. part. adj. alcalescens alkaline- making. Spheres, 0.3 to 0.7, averaging 0.4, micron in diameter, occurring in irregular masses, in pairs, in short chains or singly. Gram- negative. Gelatin: No liquefaction. Agar deep colonies: At first punctiform, becoming lenticular. Gas bubbles appear after 16 to 18 hours. Blood agar colonies: Minute. Several strains produce a greenish pigment. No hemolysis. Peptone broth: Gas produced. Broth be- comes slightly alkaline. Milk: Gas but no acid. No coagulation. Indole not produced. Hydrogen sulfide not produced. Egg white and coagulated seriim not at- tacked. Carbohj^drates not attacked. Nitrites not produced from nitrates. Ammonia and hj-drogen produced in small amounts. Strictly anaerobic.
- Under the present International Bacteriological Code of Nomenclature, the specific
epithet alcalescens is the correct epithet for this species. The epithet gazogenes cannot be reestablished on the transfer to a new genus {Veillonella) as it was illegitimate when it was first proposed by Hall and Howitt.
