Chains of Streptococcus sp. bacteria

Chains of Streptococcus sp. bacteria

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Caption: False-colour scanning electron micrograph (SEM) of Streptococcus sp. bacteria, occurring here in two chains. Streptococci are a genus of Gram-positive, non-motile, spherical bacteria that typically form chains. Although most are saprophytes (feed on dead and decaying matter), some are parasites of humans and animals. They also contribute as commensals to the normal, healthy flora of human respiratory, alimentary (gut) and female genital tracts. The pathogenic species include: S. pneumoniae causing pneumonia of the lungs; and S.pyogenes which accounts for the high incidence of sore throats and tonsillitis in young children. Magnification: unknown.

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Keywords: bacteria, bacterial, bacteriology, bacterium, false-coloured, gram-positive bacteria, micro-organisms, microbe, microbes, microbiology, scanning electron micrograph, sem, streptococcus, streptococcus sp., type

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