1887

Abstract

Summary

The effect of CO on the growth of 31 strains of was studied in serum and in a defined medium containing urea, ammonium chloride, asparagine, glutamine or acetamide as the nitrogen source. CO 10% enhanced the mycelial growth of all strains when the medium contained an appropriate constituent to mediate its effect. The effect of CO was most clearly demonstrated at 30°C when it induced a characteristic growth form consisting of a single swollen blastospore giving rise to a long, unbranched mycelial tube with few secondary blastospores; in atmospheric concentrations of CO only blastospore growth occurred. Growth in the blastospore form was more rapid in CO 10% than in air. Bicarbonate ions had no effect on mycelium formation. The result suggest that the induction of germ-tubes and mycelial growth is essentially a physical phenomenon caused by the intracellular accumulation of CO in limited nutrient conditions, a view consistent with other reported laboratory and clinical findings.

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1986-11-01
2022-01-21
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