The morphological features of Aegyptianella bacterifera: an intraerythrocytic rickettsia of frogs from Corsica.
Study of ultrathin sections and freeze-fracture replicas of erythrocytes containing Aegyptianella bacterifera (Rickettsiales; Anaplasmataceae) revealed that the organisms develop within a membrane bound vacuole in the erythrocyte cytoplasm. The organisms divide by binary fission to produce about 12 rickettsiae in a mature inclusion. The organisms have gram-negative cell envelopes. The distribution of intramembranous particles within the outer and plasma membranes of A. bacterifera is similar to that of other rickettsiae and gram-negative bacteria such as Escherichia coli. The definition of the genus Aegyptianella should be broadened to include rickettsiae measuring up to 5 microns in length prior to division which develop within membrane bound inclusions in erythrocytes of their hosts.
Desser
S S
SS
Department of Zoology, University of Toronto, Ontario, Canada.
Barta
J R
JR
D000710:Anaplasmataceae / Q000145:classification / Q000302:isolation & purification / Q000648:ultrastructure*; D000818:Animals; D004912:Erythrocytes / Q000382:microbiology*; D005602:France; D005614:Freeze Fracturing; D011893:Rana esculenta / Q000382:microbiology*