1965.-thin sections of filterable hemolytic anemia agent of rat , now identified as haemobartonella muris , revealed ( i ) that the agent is spherical or ellipsoidal and 350 to 700 mmu in size , ( ii ) that it has a single limiting membrane enclosing granules and some filaments ( neither cell wall nor nucleoid was found ) , and ( iii ) that it is found preferentially at the surface and sometimes within the cytoplasmic vacuoles of erythrocytes in the circulating blood and bone marrow , and multiplies there through binary fission .
C0010834
cytoplasmic
C0042219
vacuoles