Cytogenetic study of 10 cases of infectious mononucleosis

Abstract
Cytogenetic analysis of 10 cases of infectious mononucleosis has revealed increased damage in the form of chromosome breakage and aberrations typical of viral infection, but in addition a few cells were consistently found to harbour a deleted number 22, similar to the Philadelphia chromosome. The presence of a plasma inhibitor of lymphocyte response to the mitogen phytohaemagglutinin is suggested. This inhibitor appears to have a reversible action on the patient's own lymphocytes but no inhibitory effect on control lymphocytes.