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Streptococcus thermophilus formerly known as Streptococcus salivarius subsp. thermophilus [2] [1] is a gram-positive bacterium, and a fermentative facultative anaerobe, of the viridans group. [3] It tests negative for cytochrome , oxidase , and catalase , and positive for alpha-hemolytic activity. [ 3 ]
Gemella morbillorum is a species of bacteria within the genus Gemella. It is a facultative anaerobic [1] Gram positive coccus usually preferring capnophilic or microaerophilic environments. [2] From its discovery in 1917 (by R. Tunnicliff) until 1988, it was known as Streptococcus morbillorum (and briefly as Peptostreptococcus morbillorum [3]).
Bacteriophages have been described for many species of Streptococcus. 18 prophages have been described in S. pneumoniae that range in size from 38 to 41 kb in size, encoding from 42 to 66 genes each. [34] Some of the first Streptococcus phages discovered were Dp-1 [35] [36] and ω1 (alias ω-1).
Coley's toxins (also called Coley's toxin, [1] Coley's vaccine, [2] Coley vaccine, Coley's fluid or mixed bacterial vaccine) is a mixture containing toxins filtered from killed bacteria of species Streptococcus pyogenes and Serratia marcescens, named after William Coley, a surgical oncologist at the Hospital for Special Surgery who developed the mixture in the late 19th century as a treatment ...
Nevertheless, GBS can cause severe invasive infections especially in newborns, the elderly, and people with compromised immune systems. [6] β-hemolytic colonies of Streptococcus agalactiae, blood agar 18h at 36°C. S. agalactiae is also a common veterinary pathogen, because it can cause bovine mastitis (inflammation of the udder) in dairy cows.
Streptococcus mitis is a species of Gram-positive, mesophilic, alpha-hemolytic bacteria in the genus Streptococcus. These bacteria are facultative anaerobes , and made up of non-motile and non-sporing cocci (round cells) that are catalase negative .
Strep throat is caused by the bacteria Streptococcus pyogenes, or group A streptococcus. "These bacteria are contagious and can be spread through droplets when someone coughs or sneezes or through ...
Streptococcus sanguinis, closely related to S. mutans and also found in the oral cavity, has been shown to cause Infective Endocarditis. [33] Streptococcus mutans has been associated with bacteraemia and infective endocarditis (IE). IE is divided into acute and subacute forms, and the bacterium is isolated in subacute cases.