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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus iniae Pier and Madin 1976.
Streptococcus shiloi Eldar et al. 1995 is a later heterotypic synonym of Streptococcus iniae Pier and Madin 1976.
Streptococcus shiloi Eldar et al. 1995 is a later heterotypic synonym of Streptococcus iniae Pier and Madin 1976.
Gram positive,1.5 μm in diameter, non-motile, capsulated cocci. Grouped in long
chains.
chains.
White, slightly mucoid, small (1-2 mm diameter colonies after 48 hours of incubation)
colonies. Beta-hemolytic, more visible when growth occurs anaerobically (partial
hemolysis noted on human or bovine blood medium).
Growth temperature 37.0°C, no growth at 45 °C; growth at 10 °C.
Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
Brain-hearth infusion agar / broth.
colonies. Beta-hemolytic, more visible when growth occurs anaerobically (partial
hemolysis noted on human or bovine blood medium).
Growth temperature 37.0°C, no growth at 45 °C; growth at 10 °C.
Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
Brain-hearth infusion agar / broth.
Isolated from fish (diseased rainbow trout Onchorynchus mykiss & tilapia) and mammalians (skin lesions in an Amazon freshwater
dolphin Inia geoffrensis). Isolated from humans working with fish.
dolphin Inia geoffrensis). Isolated from humans working with fish.
Septicaemia in fish (meningoencephalitis, ascitis in trout & tilapia), subcutaneous abscesses in dolphin - "golf ball disease".
Possible cause of endocarditis, osteomyelitis & arthritis in humans.
Possible cause of endocarditis, osteomyelitis & arthritis in humans.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- Pier G.B. & Madin S.H.: Streptococcus iniae sp. nov., a beta hemolytic streptococcus isolated from an Amazon freshwater
dolphin, Inia geoffrensis. International Journal of Systematic Bacteriology, 1976, 26, 545-553. - Eldar A., Bejerano Y. & Bercovier H.: Streptococcus shiloi and Streptococcus difficile: two new streptococcal species causing a
meningoencephalitis in fish. Curr. Microbiol., 1994, 28, 139-143. - Eldar A., Frelier P.F., Assenta L., Varner P.W., Lawhon S. & Bercovier H.: Streptococcus shiloi, the name for an agent causing
septicemic infection in fish, is a junior synonym of Streptococcus iniae. Int. J. Syst. Bacteriol., 1995, 45, 840-842. - Mitchell R. Weinstein et al.:Invasive Infections Due to a Fish Pathogen, Streptococcus iniae. NEJM Volume 337:589-594
August 28, 1997 Number 9 . - Jun-Ren Sun, Juh-Cheng Yan, Ching-Ying Yeh, Shih-Yi Lee and Jang-Jih Lu: Invasive infection with Streptococcus iniae in
Taiwan. Med Microbiol 56 (2007), 1246-1249.
Voges-Proskauer, hippurate, alpha & beta-galactosidase, urease, arabinose, sorbitol,
lactose, inulin & raffinose are negative
Esculin hydrolysis, pyrrolidonylarylamidase, alkaline phosphatase, leucine arylamidase, arginine dehydrolase, ribose, mannitol,
trehalose & salicin are positive.
lactose, inulin & raffinose are negative
Esculin hydrolysis, pyrrolidonylarylamidase, alkaline phosphatase, leucine arylamidase, arginine dehydrolase, ribose, mannitol,
trehalose & salicin are positive.
(c) Costin Stoica
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