Tyrophagus casei, the cheese mite, is a species of mite which is inoculated into Milbenkäse and Altenburger Ziegenkäse cheese during their production. It is 0.45–0.70 millimetres (0.018–0.028 in) long, and feeds on cheese, corn, flour, old honeycombs, bird collections^{[clarification needed]}, and smoked meats.^[2]

The surface of cheese which has been colonised by mites may be covered with a fine, grey powder or bloom, due to the mites themselves and their moulted skin and faeces. These impart a distinctive "piquant" taste to various cheeses.^[3]

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  An aged Milbenkäse – cheese matured using cheese mites

• Cheese mite
• Cheese fly or cheese skipper, Piophila casei

• Finlo Rohrer (May 29, 2008). "Cheese mites and other wonders". BBC News. Includes The Cheese Mites (1903), the first science documentary meant for the public.
• A Parable by Sir Arthur Conan Doyle, at Wikisource
• The Dying Whip by Sir Arthur Conan Doyle, at Wikisource
• From a College Window by Arthur Christopher Benson, at Project Gutenberg