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Original Article

Micro-aerophilic and anaerobic growth of Pityrosporum species

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Pages 117-121 | Received 09 Oct 1980, Accepted 28 Nov 1980, Published online: 09 Jul 2009
 

Abstract

Pityrosporum orbiculare, P. ovale, and P. pachydermatis showed the same luxuriant growth when cultured under aerobic conditions, in an aerobic milieu with 7 % CO2, and under micro-aerophilic conditions. The species survived and even multiplied under strictly anaerobic conditions. These findings may explain how P. orbiculare and P. ovale can survive in the deeper parts of hair follicles.

On a medium that enhanced the production of filaments in Pityrosporum, filaments were more pronounced in the micro-aerophilic environment. Macroscopically, P. ovale showed a more luxuriant growth than P. orbiculare on this medium, but microscopically the same type of filaments were produced.

Résumé

Pityrosporum orbiculare, P. ovale et P. pachydermatis étaient cultivés dans des conditions aerobics, dans un milieu aerobic avec 7 % CO2, et dans des conditions micro-aerophilics montraient la mëme croissance luxuriante. Les espèces survivaient et se multipliaient meme, dans des conditions strictement anaerobics.

Ces découvertes devaient expliquer comment P. orbiculare et P. ovale peuvent survivre dans les parties les plus profondes des gaines de poils. Sur des bases, qui augmentaient la production des filaments en Pityrosporum, les filaments e'taient plus prononcés dans l'environment micro-aérophilic.

Macroscopiquement, P. ovale montrait une croissance plus luxuriante que P. orbiculare sur ces bases, mais microscopiquement la même espèce des filaments se produisaient.

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