1887

Abstract

Nine male chimpanzees originally reared in solitary cages were set up to form a group. Plasma viral load of the lymphocryptovirus (LCV) of chimpanzee [Epstein–Barr virus chimpanzee (EBVcmp)] was measured by real-time PCR. In the group formation (Form) period, the first-ranking male showed an imminent increase in plasma EBVcmp load compared with 1 week before (pre-Form) and 3 months after (post-Form) group formation. Other upper-ranking males such as the second-, third- and fourth-male also showed the highest level of viral load in the Form period. The kinetics of EBVcmp load in the Form period were statistically different from other periods (against pre-Form, =−4.878, <0.001; against post-Form, =6.434, <0.001). The effect of the male dominance rank did not differ between the pre-Form and post-Form periods (=−1.557, =0.12). Reactivation of LCV (EBV) as an immunological stress marker for humans might also be applied to chimpanzees.

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2010-08-01
2019-11-19
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The dominance rank of the nine chimpanzees

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