Roquefortin C is a mycotoxin produced by various fungi, particularly species from the Penicillium genus. It was first isolated from a strain of Penicillium roqueforti, a species commercially used to make Roquefort, Danish Blue, Stilton and Gorgonzola cheeses. Roquefortine C is a potent neurotoxin. Penitrem A is a well-recognized tremorgenic mycotoxin produced by several Penicillium spp. However, most natural cases of penitrem A intoxication have been associated with Penicillium crustosum. Another Penicillium sp., Penicillium roqueforti, is used for the production of blue cheese and is found in silage and feeds. Penicillium roqueforti produces a mycotoxin, roquefortine C, which is also produced by P. crustosum. In contrast to a tremorgenic syndrome produced by penitrem A, roquefortine C toxicosis is characterized by a paralytic syndrome.
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