Studies on Agar-agar

Studies of Agar-digesting Bacteria.

Differentiation of Candida dubliniensis on chrom agar and Pal's agar.

Difference in expression of putative virulence factors and in antifungal susceptibility among different Candida species has raised the need for species-level identification. The close relationship of Candida dubliniensis with C. albicans has led to misidentification of C. dubliniensis isolates as C. albicans. Phenotypic tests include ability to produce chlamydospore on casein agar, colony colou...

The Introduction of Agar-agar into Bacteriology.

Among fundamental developments in bacteriology the elaboration of solid culture substrates will always hold first place. With the introduction of a method for isolating micro6rganisms and growing them in pure culture, bacteriologists possessed the means for studying what Ferdinand Cohn (1872) called "Die kleinsten lebenden Wesen." Credit for the discovery of the solid medium technique is common...

Blood agar, chocolate agar, and Mycobacterium tuberculosis.

We have read with interest the recent paper by Drancourt et al. in which they reviewed the use of blood agar medium for the primary isolation of Mycobacterium tuberculosis (2). They state that to their knowledge “no comparative study comparing the efficacy of blood-based agars and egg-based agars has been carried out, and even the ability of blood agar to support growth of M. tuberculosis was f...

Studies with the Agar Cup-Plate Method: I. A Standardized Agar Cup-Plate Technique.

Official Circular 198 (Ruehle and Brewer, 1931) gives directions for performing the agar cup-plate test. However, in the limited literature dealing with the subject, no mention is made of the influence of varying the volume of agar, the amount of inoculum, the hydrogen ion concentration or other factors. In the course of other studies with the agar cup-plate method (Rose and Miller, 1939; Mille...