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% CO2. 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.
- 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