head picture
streptococcus equi zooepidemicus on blood agar plate
microscope picture gram positive cocci

Streptococcus zooepidemicus
cultivation in atmosphere enriched with CO2

Beta-hemolytic streptococci grow better in cultivation atmosphere enriched with 5-10% of CO2 (capnophylic bacteria). Colonies are larger with more distinctive beta-hemolysis around them. Cultivation on sheep blood agar, 24 hours, 37°C.

Gram-positive cocci in chains.