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Inhibition of host peripheral blood mononuclear cell proliferation ex vivo by Rinderpest virus

J. Heaney^1,2,

¹ The Queens University of Belfast, Microbiology, Royal Victoria Hospital, Belfast BT12 6BN, UK
² Institute for Animal Health, Ash Road, Pirbright, Surrey GU24 0NF, UK

Correspondence
T. Barrett
tom.barrett{at}bbsrc.ac.uk

Rinderpest, or cattle plague, is caused by Rinderpest virus (RPV), which is related most closely to human Measles virus (MV), both being members of the genus Morbillivirus, a group of viruses known to have strong immunosuppressive effects in vitro and in vivo. Here, it was shown that peripheral blood mononuclear cells (PBMCs) isolated from cattle experimentally infected with either wild-type or vaccine strains of RPV impaired the proliferation of PBMCs derived from uninfected animals; however, in contrast to either mild or virulent strains of wild-type virus, the inhibition induced by the vaccine was both weak and transient. Flow-cytometric analysis of PBMCs obtained from cattle infected with different strains of RPV showed that the proportion of infected cells was virus dose-dependent and correlated with lymphoproliferative suppression.

Present address: The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK.

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