Gram1 - Gram Positive Bacteria Streptococci. ,,.On...

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Gram Positive Bacteria Streptococci. Streptococci  are spherical bacteria that divide in parallel planes to produce chains.  The bacteria are Gram-positive, and certain species are aerobic, while others are anaerobic. On  blood agar, certain species partly destroy the red blood cells and are said to be  alpha-hemolytic Other species completely destroy the blood cells and are  beta-hemolytic . Those streptococci  producing no blood cell destruction are  gamma-hemolytic One species of streptococcus  (Streptococcus pneumoniae)  is the cause of secondary bacterial  pneumonias, while another species  (Streptococcus pyogenes)  causes strep throat and rheumatic  fever. Other species are associated with dental caries. Harmless strains of streptococci are used in  the production of yogurt, buttermilk, and cheese.  Staphylococci. Staphylococci
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