Objective To explore the clinical characteristics and risk factors of severe infectious mononucleosis(IM).Method The clinical materials of 346 inpatients with IM received a retrospective analysis.A comparison was made between 305 common cases with IM and 21 cases with severe IM
and the risk factors of severe IM received Logistic regression analysis.Results Single-factor logistic regression analysis indicated that the items including hyperpyrexia(>40℃)
jaundice
the decreases in line two and line three hemogram
cardiac damage and the EBV DNA load(>5.0×106copise/mL) were related to severe IM(p<0.05 or p<0.01).And the further Logistic regression analysis of these five factors showed that jaundice and the EBV DNA load(>5.0×106copise/mL) were relevant to severe IM(p<0.05 or p<0.01).The regression equation is Logit(P)=-3.545+1.892x1+3.039x2
and its sensitivity was 57.1% and specificity 85.8%.Conclusion The EBV DNA load(>5.0×106copies/mL) and jaundice may be responsible for the occurrence of severe IM.