Streptococcus hongkongensis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus hongkongensis
Lau et al. 2013.
Reacts with Lancefield’s group G antisera.
Gram-positive cocci, occurring in short chains. Non-motile. Non-spore-forming.
Colonies on blood agar are small (0.5-1.0 mm), opaque, convex, non-haemolytic  
after 48 h of incubation at 37 ºC, aerobically. Enhancement of growth was observed
with 5% CO
2. Also grows in microaerophilic or anaerobic  environments and on bile
aesculin agar but not MacConkey agar. Grows in 1% and 5 % NaCl but not 6 % NaCl.
Isolated from the infected tissue of a patient with a puncture injury of the right thumb by a marine fish fin in Hong Kong, China (1
strain), and from marine fish - olive flounder, a flatfish from the order Pleuronectiformes (2 strains). Resistant to optochin, polymyxin B
and bacitracin. Sensitive to novobiocin, penicillin, vancomycin, ofloxacin & levofloxacin.
Undetermined.
  1. Susanna K. P. Lau,  Shirly O. T. Curreem,  Cherry C. N. Lin,  Ami M. Y. Fung,  Kwok-Yung Yuen, Patrick C. Y. Woo. Streptococcus
    hongkongensis sp. nov., isolated from a patient with an infected puncture wound and from a marine flatfish. Int J Syst Evol
    Microbiol, July 2013 63: 2570-2576.
Most tests were performed using API Strep and API ID32 kits.

Positive results for arginine hydrolysis, aesculin hydrolysis,  alanine arylamidase, alanine–phenylalanine–proline arylamidase,
alkaline phosphatase, beta-galactopyranosidase, beta-galactosidase, beta-glucosidase, beta-mannosidase, glycyl-tryptophan
arylamidase, leucine arylamidase, N-acetyl-beta-glucosaminidase, pyrrolidonyl arylamidase, tyrosine arylamidase, acid production
from: glycogen, lactose, maltose, mannitol, ribose, starch, sucrose & trehalose.

Negative for catalase, alpha-galactosidase, beta-glucuronidase, hippurate hydrolysis, oxidase, urease, Voges-Proskauer reaction,
acid production from: arabinose, inulin, melibiose, melezitose, raffinose & sorbitol.
(c) Costin Stoica
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