Streptococcus ictaluri
May be a cause of arthritis, osteolysis, myositis and spinal meningitis in Channel Catfish broodstock.
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Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus ictaluri  
Shewmaker et al. 2007.
Gram-positive cocci, grouped in pairs or short chains.
Colonies on 5% sheep blood Columbia agar are nonhemolytic and nonpigmented.
Growth temperature 25-35 ºC, optimal temperature for growth was 30 ºC. No growth
at 45 ºC. No growth in 6.5% NaCl broth.
Isolated from channel catfish (Ictalurus punctatus). Habitat is unknown. Susceptible to vancomycin.
  1. P. Lynn Shewmaker, Alvin C. Camus, Tim Bailiff, Arnold G. Steigerwalt, Roger E. Morey and Maria da Glória S. Carvalho:
    Streptococcus ictaluri sp. nov., isolated from Channel Catfish Ictalurus punctatus broodstock. IJSEM July 2007 vol. 57 no. 7 1603-
    1606.
Positive results for pyrrolidonylarylamidase, leucine aminopeptidase, alkaline
phosphatase, alanine-phenylalanineproline arylamidase, pyroglutamic acid
arylamidase, acid production from: maltose, and ribose.

Negative results for catalase, hippurate hydrolysis, esculin hydrolysis, pyruvate utilization, acetoin production, arginine dihydrolase,
urease, beta-glucosidase, beta-galactosidase, beta-glucuronidase, alpha-galactosidase, N-acetyl-beta-glucosaminidase,
glycine-L-tryptophan arylamidase, beta-mannosidase  urease, acid production from: mannitol, sorbitol, lactose, trehalose, raffinose,
sucrose, L-arabinose, D-arabitol, cyclodextrin, glycogen, pullulan, melibiose, melezitose, methyl-beta-D-glucopyranoside, and
tagatose.
(c) Costin Stoica
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