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30.5 x 23.9 cm ⏐ 12.0 x 9.4 in (300dpi)
DR. GEORGE CHAPMAN, VISUALS UNLIMITED / SCIENCE PHOTO LIBRARY DR. GEORGE CHAPMAN, VISUALS UNLIMITED / SCIENCE PHOTO LIBRARY
Streptococcus bacteria Bacteria. These gram-positive bacteria are rounded or spherical that typically form chains. Pathogenic strains of Streptococcus accounts for the high incidence of sore throats, tonsillitis and middle ear infections in children. TEM.
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