Comma bacteria

A third group of bacteria are the curved or bent rods. Of these, the genus Vibrio is composed of bacteria that arc comma-shaped and die genus Spirillum consists of those that are twisted and spiral in form. All members... 

In the microbial world, occurrence of sialidase appears mostly to be restricted to ortho- and to paramyxoviruses and to members of two major taxonomic orders of bacteria, Eubacteriales and Pseudomona-dales (for review, Drzeniek, 1972), but not entirely. Sialidase also has been uncovered in one of the Mycoplasmatales (gallisepticum, Sethi and Muller, 1972 Roberts, 1967), as well as in a structurally related L-phase variant of Vibrio comma, or cholerae (Madoff et aL, 1961) this latter belongs, however, to the Spirillaceae family of the aforementioned Pseudomonadales. Sialidase has been found also in a higher Protistan, Trichomonas foetus (Romanovska and Watkins, 1963) and in several strains of a fungus, Streptomyces albus (Myhill and Cook, 1972), of the order Actinomycetales. Future discoveries may further widen the pat-... 

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