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Original Article

The relationship of Cladosporium carrionii to Cladophialophora ajelloi

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Pages 209-218 | Accepted 15 Nov 1983, Published online: 09 Jul 2009
 

Abstract

Twelve of 21 isolates of Cladosporium carrionii, when grown on nutritionally deficient media such as lactrimel agar, hay infusion agar, diluted corn meal dextrose agar, and water agar, produced urniform phialides and phialoconidia identical with those produced by two isolates of Cladophialophora ajelloi. All isolates of C. carrionii and Cph. ajelloi hydrolyzed urea in 7 days, but failed to liquefy gelatin. The decomposition of casein, xanthine, hypoxanthine, and tyrosine was found to be of no diagnostic value because of the variable results given by the isolates of C. carrionii. None of the C. bantianum isolates or commonly encountered saprophytic species of Cladosporium, such as C. cladosporioides and C. herbarum, showed the ability to form phialides on any of the media tested.

Because of the identical nature of the two synanamorphs of Cph. ajelloi, namely the Cladosporium-type and the Phialophora-type, with those of C. carionii, Cph. ajelloi is considered to be a later synonym of C. carrionii. The Latin description of C. carrionii is emended to include the Phialophora anamorph.

Riassunto

Dodici ceppi su ventuno di Cladosporium carrionii, coltivati su terreni solidi poveri quali il lactrimel agar, l'infuso di fieno, il “corn meal” diluito od il semplice agar, producevano fialidi e fialoconidi uniformi, identici a quelli prodotti da due ceppi di Cladophialaphora ajelloi. Tutti i ceppi di C. carrionii e Cph. ajelloi idrolizzavano l'urea in 7 giorni ma non fluidificavano la gelatina. I tests d'idrolisi della caseina, della xantina, dell'ipoxantina e della tirosina non si rivelavano d'alcun valore diagnostico a motivo della variabilità della risposta data da due ceppi di C. carrionii. Nessun ceppo di C. bantianum nè delle comuni specie saprofitiche di Cladosporium, quali C. cladosporioidies e C. herbarum era in grado di formare fialidi su alcun terreno.

Poichè le due forme di sviluppo di Cph. ajelloi, e cioè il tipo Cladosporium ed il tipo Phialaphora, sono identiche a quelle di C. carrionii, Cph. ajelloi è da considerare un sinonimo successivo di C. carrionii. Pertanto, la descrizione latina di C. carrionii viene corretta onde includere la forma Phialophora.

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