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Streptococcaceae. Streptococcaceae are a family of Gram-positive bacteria, placed within the order Lactobacillales. [1] Representative genera include Lactococcus, Lactovum, and Streptococcus .
Streptococcus zooepidemicus. Viridans streptococci. Streptococcus anginosus group. Streptococcus is a genus of gram-positive coccus ( pl.: cocci) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. [2]
The term streptococcus (“twisted berry”) refers to the bacteria’s characteristic grouping in chains that resemble a string of beads. Streptococci are microbiologically characterized as gram-positive and nonmotile. Streptococcus contains a variety of species, some of which cause disease in humans and animals, while others are important in ...
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The Streptococcaceae are distinguished from the Micrococcaceae in that the former are catalase negative and the latter are catalase positive. In the Streptococcaceae family, only streptococci and aerococci are regularly isolated from specimens of human origin (see Table 2.1). There have been recent taxonomic changes in the family Streptococcaceae.
Jun 8, 2018 · Streptococcus (strep-toh-kok-ŭs) n. a genus of Gram-positive nonmotile spherical bacteria occurring in chains. Most species are saprophytes, but some are pathogenic. Haemolytic streptococci destroy red blood cells in blood agar and are the cause of many infections, including bacterial endocarditis (α-haemolytic strains) and scarlet fever (β ...
May 31, 2022 · Streptococcal diseases have been known for centuries, although their delineation into separate disease entities did not begin to occur until the 16th century AD. The original writings of Hippocrates from the 4th century BC describe the disease erysipelas (ἐρυσίπελας, red skin), as well as the symptoms of childbed fever, and “Galen remarks that not only erysipelas, but also ...
Streptococcus pyogenes is a species of Gram-positive, aerotolerant bacteria in the genus Streptococcus. These bacteria are extracellular, and made up of non-motile and non-sporing cocci (round cells) that tend to link in chains. They are clinically important for humans, as they are an infrequent, but usually pathogenic, part of the skin ...
