[Nocardia pellegrini: III. An attempt of phage typing(author's transl)]. 1975

D Pietkiewicz, and J Andrzejewski, and W Manowska, and A Bogunowicz

The typing of Nocardia pellegrini with different Nocardia-phages was studied. The investigation included 25 Nocardia pellegrini strains, 19 strains of different Nocardia species and also strains of different species of mycobacteria. It could be stated that phages typical for Nocardia pellegrini were also active against other fast fragmentating Nocardia species, such as Nocardia corallina or Nocardia rubra. However, they did not attack Nocardia asteroides or strains of mycobacteria. Phages typical for mycobacteria or for Nocardia asteroides did not lysate the fast fragmentating nocardia (Table 1 and 2). Mutants of one Nocardia pellegrini phage could be isolated which showed a broader host range than the parent phage (Table 1 and 2). Some lysogenic strains of Nocardia pellegrini with a changed phage sensitivity could be isolated after action of the phages (Table 3). The taxonomical position of Nocardia pellegrini and Nocardia rubra is discussed.

UI MeSH Term Description Entries
D008242 Lysogeny The phenomenon by which a temperate phage incorporates itself into the DNA of a bacterial host, establishing a kind of symbiotic relation between PROPHAGE and bacterium which results in the perpetuation of the prophage in all the descendants of the bacterium. Upon induction (VIRUS ACTIVATION) by various agents, such as ultraviolet radiation, the phage is released, which then becomes virulent and lyses the bacterium. Integration, Prophage,Prophage Integration,Integrations, Prophage,Prophage Integrations
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D009161 Mycobacterium A genus of gram-positive, aerobic bacteria. Most species are free-living in soil and water, but the major habitat for some is the diseased tissue of warm-blooded hosts. Mycobacteria
D009615 Nocardia A genus of gram-positive, aerobic bacteria whose species are widely distributed and are abundant in soil. Some strains are pathogenic opportunists for humans and animals. Micropolyspora
D009616 Nocardia asteroides A species of bacterium of the family NOCARDIACEAE, producing pulmonary infections in man.
D001434 Bacteriophage Typing A technique of bacterial typing which differentiates between bacteria or strains of bacteria by their susceptibility to one or more bacteriophages. Phage Typing,Typing, Bacteriophage,Typing, Phage
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species

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