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Spirochete
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I've looked all over and I can only find information on blood agar hemolyis for gram positive bacteria. Can I take this to mean that gram negative bacteria are generally gamma hemolytic? If so, are there any notable exceptions to this? One that I would guess is pathogenic E. coli, which cause hemolytic uremic (sp?) syndrome, but I was unable to find a direct connection to sheep's blood agar.