We are having good results with the following HHV8. Be sure that your
positive staining is nuclear, and in a speckled pattern.
MFRG: Advanced Biotechnologies
CLONE: LN-1
CAT#:  13-210-001
PRETRTMNT: Citrate Buffer  pH6 in microwave pressure cooker for 8 min.
DILUTION: 1:1000 with streptav. ABC

Note that this is a rat IgG antibody. Also, independently determine
pretreatment and titer.

Good luck with it. 

Patti Loykasek
Phenopath Laboratories
Seattle, WA