R. Hoffmann et al., ARCHAEA LIKE ENDOCYTOBIOTIC ORGANISMS ISOLATED FROM ACANTHAMOEBA SP (GR-II), Endocytobiosis and cell research, 12(3), 1998, pp. 185-188
Free-living amoebae of the genus Acanthamoeba (Gr II) isolated from a
potable water reservoir harbored intracytoplasmic multiplying microorg
anisms of unknown nature. Their voluminous envelopes exhibit a very fi
ne texture. This texture results from tubules with central core. In so
me longitudinal sections ostiolar gaps were found at one of the poles.
The tubules forming the ostiole lack the central core and leave wider
spaces than the tubules of the envelope. The interior of the cell app
ears nearly amorphous except for a delicate balloon like invagination
of the basis of an ostiole and a dot like structure observed near one
of the poles. Because of some of these characteristics the unique orga
nisms are supposed to be related distantly to archaea.