- Volume 16, Issue 3, 1966

The effect of penicillin upon morphology was studied with two species of bacteria and with streptococci. The morphology of Miyagawanella psittaci varied considerably under the influence of penicillin in contrast to the lack of such effect upon viruses. Classification of miyagawanellae outside the viruses is justified. Appropriate dosages of penicillin induced extensive branching in Lactobacillus bifidus. This contrasted with the lack of such effect upon L. acidophilus. Removal from the family Lactobacillaceae is justified and indicates relationship to the actinomycetes. Cells of five species of the streptococcus showed development of oval and elongated forms while four strains of micrococci revealed changes in size and not in shape. This indicates lack of close relationships between streptococci and micrococci.

A new Salmonella sp. (serotype)— S. rechovot—was isolated from the floor of a slaughter house. Its antigenic structure is (8), 20: e, h:z6.

A new Leptospira serotype, of the “hebdomadis “ group, was isolated from Erinaceus europaeus roumanicus (the European hedgehog). The name Leptospira polonica nom. nov. was proposed and accepted.

Two new Salmonella serotypes were described. Culture 3018/64; serotype 48:g(p), z51:-; was isolated from a marine iguana and was assigned the name S. marina. Culture 3210/64; serotype 6, 7:1, w:1, 2; was isolated from the feces of a Gaboon viper and the name S. gabon was given to it.

The methods used by collaborators in the International Streptomyces Project (ISP) for emendation of descriptions of type and neotype strains of the genus Streptomyces (Actinomycetales) are presented.