This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Reprints and Permissions Copyright Information Books from ASM Press MicrobeWorld Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nero, L. C. Articles by Hedrick, L. R. Search for Related Content PubMed PubMed Citation Articles by Nero, L. C. Articles by Hedrick, L. R.

GROWTH OF ACANTHAMOEBA CASTELLANI WITH THE YEAST TORULOPSIS FAMATA

Biology Department, Illinois Institute of Technology, Chicago, Illinois

ABSTRACT

NERO, L. C. (Illinois Institute of Technology, Chicago), MAE G. TARVER, AND L. R. HEDRICK. Growth of Acanthamoeba castellani with the yeast Torulopsis famata. J. Bacteriol. 87:220–225. 1964.—Acanthamoeba castellani and Torulopsis famata cells were cultured together for 10 days at three different temperatures: 18, 25, and 32 C. In the 18- and 25-C series, the yeast population reached a peak within 3 to 5 days and then declined for the next 5 days. This decrease in yeast population corresponded with an increase in the development of amoebae, which first appeared as vegetative cells and later transformed themselves into cysts. The changes in population were determined by counts in a hemocytometer. The vegetative amoeba population seldom exceeded 4 x 10⁷ cells per bottle culture, but the encysted population approached 16 x 10⁷ cysts per bottle culture within 10 days of incubation. The amoebae actively ingested the yeasts and used these cells as their principal source of energy. At 18 C each amoeba consumed 70 yeast cells per day; at 25 C each amoeba ingested 35 yeast cells per day. In the 32-C series, both the yeast and the amoebae had slow growth rates. The development of cysts corresponded with the growth of the yeast population without the rapid increase in yeast population prior to the growth of the amoebic cells.

This article has been cited by other articles:

• Noble, J. A., Ahearn, D. G., Avery, S. V., Crow, S. A. Jr. (2002). Phagocytosis Affects Biguanide Sensitivity of Acanthamoeba spp.. Antimicrob. Agents Chemother. 46: 2069-2076 [Abstract] [Full Text]