were measured on nutrient agar plates. In all three species, 0.1, 0.5, and 1.0% lithium chloride progressively increased the colony sizes. On the other hand, 2.0, 3.5, and 5.0% LiCl progressively reduced the colony diameters, resulting in the isolation of predominantly small-colony variants (Table 1). It is probable that the higher concentrations of LiCl selected small-colony variants from the ...

Genes determining the flagellar antigens were introduced from Hfr Salmonella abony into F-Escherichia coli by sexual recombination. The gene H I for the phase-1 flagellar antigen of Salmonella was found to be allelic to H , the gene for the only flagellar antigen of E. coli. The phase-2 antigen of Salmonella has no counterpart in E. coli; if the corresponding salmonella gene H 2 is introduced i...

There have been many conflicting results concerning the in vitro effect of thyroxine upon respiratory enzyme systems (Barker, 1951). With regard to the succinoxidase system, Gemmill (1952) and Radsma et al.(1954) showed that thyroxine augmented the enzyme activity in vitro, while, in contrast to such results, McShan et al.(1947) reported inhibitory effect of the hormone, and furthermore, Smith ...

Littman Oxgall Agar was modified by adding an extract of Guizotia abyssinica seeds with a water diluent for rehydration. In this medium, colonies of Cryptococcus neoformans became brown, but the color failed to develop in eight other yeasts and yeast phases of diphasic organisms. The depression of saprophytic fungi noted on Littman Oxgall Agar was not lost in the modification.

We examined preserved medical charts of 470 Spanish influenza patients (8 with fatal cases) hospitalized at former army hospitals in Japan during 1919-1920. The following factors were associated with longer periods of hospitalization: adventitious discontinuous lung sounds, maximum respiration rate, continuation of high fever after hospital admission, and diphasic fever.

Four methods for the detection of Trichomonas vaginalis in vaginal secretions from 88 symptomatic patients were compared: wet-mount examination, Kupferberg liquid medium, Hirsch charcoal agar, and the Papanicolaou smear. Hirsch diphasic slants and Kupferberg medium did not significantly differ in sensitivity from direct examination of wet mounts. The Papanicolaou smear identification of trichom...