Bacteriophage-associated spherical bodies in Bacteroides fragilis.
AUTOR(ES)
Silver, R P
RESUMO
Unique spherical bodies with multilayered walls were observed by electron microscopy in cells of a single strain of Bacteroides fragilis subsp. fragilis. Phage-like particles were present in the same cells, both free in the cytoplasm and within the spheres. The proportion of cells containing the phage-associated spherical structures ranged from less than 0.01% to about 7% depending on the culture conditions. Phage particles of morphological type B and spherical bodies were also found free in the medium surrounding the cells. Spherical bodies with discontinuities in their walls, through which phage-like particles sometimes appeared to be escaping, were also found both intra- and extracellularly. The biological significance of these distinctive spherical structures is a matter of conjecture.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=354533Documentos Relacionados
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