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bacteria genus, 1877, Modern Latin, coined by Viennese surgeon Albert Theodor Billroth (1829-1894) from Greek streptos "twisted" + Modern Latin coccus "spherical bacterium," from Greek kokkos "berry" (see cocco-). So called because the bacteria usually form chains.
streptococcus strep·to·coc·cus (strěp'tə-kŏk'əs)
n. pl. strep·to·coc·ci (-kŏk'sī, -kŏk'ī)
A bacterium of the genus Streptococcus.
A genus of gram-positive, anaerobic, often pathogenic bacteria having an ovoid or spherical appearance and occurring in pairs or chains, including many erythrocytolytic and pathogenic species that cause erysipelas, scarlet fever, and septic sore throat in humans.
Plural streptococci (strěp'tə-kŏk'sī, -kŏk'ī)
Any of various bacteria of the genus Streptococcus that are gram-positive cocci and are normally found on the skin and mucous membranes and in the digestive tract of mammals. One type of streptococcus, Group A, is a common pathogen in humans and causes various infections, including strep throat, scarlet fever, pneumonia, and some types of impetigo.