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J. Virol., 03 1996, 1633-1639, Vol 70, No. 3
A Voevodin, E Samilchuk, H Schatzl, E Boeri and G Franchini
An outbreak of malignant lymphoma has been observed in one of the baboon
(Papio hamadryas) stocks of Sukhumi Primate Center. More than 300 cases in
this "high-lymphoma stock" have been registered since 1967. Human T-cell
lymphotropic virus type 1 (HTLV-1)-related virus was implicated as the
etiologic agent of Sukhumi baboon lymphoma. The origin of this virus
remained unclear. Two possibilities were originally considered: the origin
could be baboon simian T-cell leukemia/lymphoma virus type 1 (STLV-1) or
HTLV-1 (before the outbreak started, some Sukhumi baboons were inoculated
with human leukemic material). The third possibility entered recently:
interspecies transmission of rhesus macaque STLV-1 to baboons. It was
prompted by the finding of very close similarity between STLV-1 991-1cc
(the strain isolated from a non-Sukhumi baboon inoculated with material
from a Sukhumi lymphomatous baboon) and rhesus STLV-1. To test this
hypothesis, we investigated 37 Sukhumi STLV-1 isolates from baboons of
high-lymphoma stock by PCR discriminating rhesus type and baboon type
STLV-1 isolates. All of them were proved to be rhesus type STLV-1. In
contrast, all six STLV-1 isolates from baboons belonging to other stocks or
populations were of baboon type. The PCR results were fully confirmed by
DNA sequence data. The partial env gene gene sequences of all four STLV-1
isolates from Sukhumi lymphomatous baboons were 97 to 100% similar to the
sequence of known rhesus STLV-1 and only 85% homologous with the sequence
of conventional baboon STLV-1. Thus, interspecies transmission of STLV-1
from rhesus macaques (or closely related species) to baboons occurred at
Sukhumi Primate Center. Most probably this event initiated the outbreak of
lymphoma in Sukhumi baboons.
Copyright © 1996, American Society for Microbiology
Interspecies transmission of macaque simian T-cell leukemia/lymphoma virus type 1 in baboons resulted in an outbreak of malignant lymphoma
Department of Microbiology, Faculty of Medicine, Kuwait University, Kuwait. voevodin@hscc.kuniv.edu.kw
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