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Penicillium chrysogenum (formerly known as Penicillium notatum) is a species of fungus in the genus Penicillium. It is common in temperate and subtropical regions and can be found on salted food products, [ 1 ] but it is mostly found in indoor environments, especially in damp or water-damaged buildings. [ 2 ]
In 1931, Thom re-examined different Penicillium including that of Fleming's specimen. He came to a confusing conclusion, stating, "Ad. 35 [Fleming's specimen] is P. notatum WESTLING. This is a member of the P. chrysogenum series with smaller conidia than P. chrysogenum itself."
The mould was identified as Penicillium chrysogenum and designated as NRRL 1951 or cantaloupe strain. [106] [116] The spores may have escaped from the NRRL. [117] [a] [b] Between 1941 and 1943, Moyer, Coghill and Raper developed methods for industrialized penicillin production and isolated higher-yielding strains of the Penicillium fungus.
The principal commercial strain of Penicillium chrysogenum (the Peoria strain) produces penicillin G as the principal component when corn steep liquor is used as the culture medium. [8] When phenoxyethanol or phenoxyacetic acid are added to the culture medium, the mould produces penicillin V as the main penicillin instead.
Penicillium growth can still occur indoors even if the relative humidity is low, as long as there is sufficient moisture available on a given surface. A British study determined that Aspergillus- and Penicillium-type spores were the most prevalent in the indoor air of residential properties, and exceeded outdoor levels. [14]
Today's NYT Connections puzzle for Sunday, January 19, 2025The New York Times
Penicillium abidjanum [2] Penicillium adametzii [2] Penicillium adametzioides [2] Penicillium aeris [3] Penicillium aethiopicum [2] Penicillium albicans [2] Penicillium albidum [2] Penicillium albocoremium; Penicillium alexiae [4] Penicillium alfredii [5] Penicillium alicantinum [4] Penicillium allahabadense [6] Penicillium allii; Penicillium ...
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