3.2.4. The controversy and Years’: 1940 to 1960 ‘Dark 1940-1960 are known as the Years’ and spanned a period of more controversy. The ‘Dark hard won progress in the field was forgotten as a consequence of the Second World War and the overwhelming effect of cortisone treatment becoming available in the late 1940s, to which human seborrhoeic dermatitis responded. The role of Malassezia yeasts in the disease was thus forgotten. 1970 The systematics were rectified when Sloff in Lodder’s Yeasts, a taxonomic study’ ‘The assigned all Pityrosporum that grew on media without lipid enrichment as single species of P pachydermatis.[53] 1984, The third edition of Yeasts, a Taxonomic Study’ (Yarrow and Ahearn) referred to ‘The the new genus and confirmed that one species grew without lipid Malassezia enrichment.[54] [55]. This was later officially added into the taxonomical order.[56] 1990 A new species, Malassezia sympodialis was described[19] and by 1996 four new species were added to the genus.[20] This species was later isolated from a cat by Bond et al. in 1996.[57] 3.2.5 Modern Technology Currently there are 17 different species of Malassezia.[35, 58] The genus continues to expand and this is likely to continue as the classical microbiological approaches ‘bottom-up’ merge with organism-level genomics and community or meta-genomics. ‘systems--level 3.3 Malassezia yeasts in animals 3.3.1. Canine ear and skin disease: the first reports (1951 to 1999).
3.2.4. The controversy and ‘Dark Years’: 1940 to 1960 1940-1960 are known as the ‘Dark Years’ and spanned a period of more controversy. The hard won progress in the field was forgotten as a consequence of the Second World War and the overwhelming effect of cortisone treatment becoming available in the late 1940s, to which human seborrhoeic dermatitis responded. The role of Malassezia yeasts in the disease was thus forgotten. 1970 The systematics were rectified when Sloff in Lodder’s ‘The Yeasts, a taxonomic study’ assigned all Pityrosporum that grew on media without lipid enrichment as single species of P pachydermatis.[53] 1984, The third edition of ‘The Yeasts, a Taxonomic Study’ (Yarrow and Ahearn) referred to the new genus Malassezia and confirmed that one species grew without lipid enrichment.[54] [55]. This was later officially added into the taxonomical order.[56] 1990 A new species, Malassezia sympodialis was described[19] and by 1996 four new species were added to the genus.[20] This species was later isolated from a cat by Bond et al. in 1996.[57] 3.2.5 Modern Technology Currently there are 17 different species of Malassezia.[35, 58] The genus continues to expand and this is likely to continue as the classical ‘bottom-up’ microbiological approaches merge with organism-level genomics and community or ‘systems--level meta-genomics. 3.3 Malassezia yeasts in animals 3.3.1. Canine ear and skin disease: the first reports (1951 to 1999).
clinical-consensus-guidelines-diagnosis-treatment-malessezia-dermatitis.docx