Talk:MacConkey agar

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This may or may not be true, but is in need of rewording and correct placement in the article:

"this media also allows growth of staphylococcus aureus which a gram positive lactose fermenting bacteria but in this we then don't add crystal violet". —The preceding unsigned comment was added by 69.107.2.1 (talk • contribs).

That information is incorrect. Bile salts are capable of completely inhibiting all growth of S. aureus and merely removing the crystal violet would not allow the organism to grow. MacConkey agar is specifically a selective medium for that reason; it doesn't allow any Gram-positive bacteria to grow. Areyoucontagious 20:42, 5 April 2007 (UTC)