Brevibacillus agri
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Paenibacillaceae, Genus Brevibacillus, Brevibacillus agri (Laubach and
Rice, 1916; Nakamura 1993) Shida, Takagi, Kadowaki and Komagata 1996.
Historical synonyms:
Bacillus agri Laubach and Rice 1916, Bacillus agri (Laubach and Rice 1916) Nakamura 1993, Bacillus
galactophilus
Takagi et al. 1993.
Gram positive, motile (peritrichous flagella) rod, 0.5-1.0 x 2.0-5.0 µm. Produces
ellipsoidal spore, swelling the sporangia.
Grows on routine media (nutrient agar, TSA): non-pigmented, translucent, thin,
smooth, colonies of about 2 mm in diameter. Aerobic. No anaerobic growth.
Maximum temperature 40 ºC; minimum temperature 5-20 ºC; optimum 28 ºC.
Grows in 2% NaCl, but not in 3% NaCl. Grows at pH 5.6, but not at pH 9.
Isolated from soil, water, clinical specimens, sterilized milk, and pharmaceutical manufacturing plants.
No growth in 0.001% lysozyme.
Isolated from clinical specimens.
  1. Priest F.G., 2009. Genus I.  Paenibacillus  Ash, Priest and Collins 1994. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W.
    Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes,
    Springer, 305-316.
  2. Shida O., Takagi H., Kadowaki K. and Komagata K. , 1996. Proposal for Two New Genera, Brevibacillus gen. nov. and
    Aneurinibacillus gen. nov. IJSB 46, 4, 939-946.
  3. Nakamura L.K., 1993. DNA Relatedness of Bacillus brevis Migula 1900 Strains and Proposal of Bacillus agri sp. nov., nom. rev.,
    and Bacillus centrosporus sp. nov., nom. rev. IJSB 43, 1, 20-25.
Positive results for catalase, hydrolysis of casein, hydrolysis of gelatin, hydrolysis of
tyrosine, acid production from: N-acetylglucosamine, D-fructose, glucose, maltose,
mannitol, sucrose & trehalose.

Negative results for citrate utilization, H
2S production, hydrolysis of starch, hydrolysis of urea, indole production, nitrate reduction,
ONPG, oxidase, Voges-Proskauer test, acid production from: arabinose, galactose, lactose, rhamnose, salicin, sorbitol, tagatose,
turanose & xylose.

Variable results for acidification of cellobiose, mannose & ribose.
(c) Costin Stoica
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