5
Views
1
CrossRef citations to date
0
Altmetric
Original Article

Histoplasma capsulatum: Effects of pH on the yeast and mycelial phases in vitro

Pages 267-270 | Published online: 09 Jul 2009
 

Abstract

The yeast phase of the A and B phenotype of Histoplasma capsulatum will grow well in shake culture in Modified Sabouraud broth with an initial pH between 5–10. There is minimal growth at pH 4·5 and pH 11 and no growth or survival at pH 3–4. The mycelial phase at 25°C in stationary cultures will grow and sporulate in media with an initial pH 6–12 for the A phenotype and an initial pH 6–8 for the B phenotype. The minima and maxima of growth for both mycelial phenotypes extend from initial pH 5–12. The ecological and isolation implications of these in vitro results are discussed.

Résumé

La phase levure des phénotypes A et B de Histoplasma capsulatum se développent bien en cultures agitées, sur milieu liquide de Sabouraud modifié, avec un pH initial compris entre 5 et 10. La croissance est minimale à pH 4,5 et pH 11 et aucune croissance ou survie à pH 3–4. La phase mycélienne, en culture stationnaire sur le même milieu, à 25°C se développe et sporule à des pH compris entre 6 et 12 pour le phénotype A et entre 6–8 pour le phénotype B. Le minimum et le maximum de croissance pour les deux phases mycéliennes des deux phénotypes s'étendent de pH 5 à pH 12. Les implications écologiques ainsi que les conditions d'isolement in vitro de ces phénotypes sont discutées.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.