In conclusion, our data demonstrate a similarity of
the course of Ebola fever adEBO-infected baboons with
that in the same monkey species infected with nonadapted
EBO. However, we report on several distinct
features of the disease caused by adEBO: (1) prolongation
both of the febrile period and the delay of the
‘critical point’ by two days; (2) vacuolization of the
neutrophil cytoplasm; (3) appearance of juvenile
lymphocytes; and (4) increase in the spontaneous
mononuclear proliferation during the terminal stage of
infection.