Infectious mononucleosis

Severe infectious mononucleosis in immunocompetent adults

OBJECTIVES

To determine the risk factors for severe infectious mononucleosis (IM) occurrence in immunocompetent adults.

METHODS

We performed a multicenter, retrospective case series including immunocompetent adults presenting with confirmed IM between 2001 and 2011. Severe presentations were compared with uncomplicated presentations using Stata^® 9 software. The significance level was set at 5%.

RESULTS

In univariate analysis, age over 30 years (n=13 or 41.9% vs. n=5 or 12.8%; P=0.006), prior use of non-steroidal anti-inflammatory drugs (NSAIDs) (n=7 or 87.5% vs. n=1 or 12.5%; P=0.009), and smoking (n=13 or 68.4% vs. n=6 or 31.6%; P=0.013) were associated with severe IM onset. In multivariate analysis, only age over 30 years (OR=3.55; P=0.05) and prior use of NSAIDs (OR=15; P=0.05) remained associated with severe IM onset, without reaching significance level (P=0.05).

CONCLUSION

Our study confirmed that age over 30 years is a risk factor for severe IM onset. Prior use of NSAIDs also seems to be correlated with severe presentations. This new data needs to be confirmed in a prospective study.

Return to work following sickness absence due to infectious mononucleosis

BACKGROUND

Epstein-Barr virus infectious mononucleosis among adults is notorious because of the prolonged incapacitating fatigue it causes.

AIMS

To investigate the duration of sickness absence and return to work following infectious mononucleosis.

METHODS

Episodes of sickness absence due to infectious mononucleosis were selected from an occupational health services register. The duration of sickness absence and return to work was assessed with Kaplan-Meier survival analysis.

RESULTS

Two thousand one hundred and thirty-seven episodes of absence due to infectious mononucleosis had a median duration of 91 days. Young employees (aged 15-24 years) had the highest return to work rates. Women had longer sickness absence than men. Employees working in small companies were absent longer than employees in large companies.

CONCLUSIONS

Occupational physicians should advise gradual return to work, starting 4 weeks after the onset of the illness, in order to prevent physical deconditioning and prolonged illness.

Epidemiologic and clinical characteristics of infectious mononucleosis associated with Epstein-Barr virus infection in children in Beijing, China

BACKGROUND

infectious mononucleosis (IM) is a self-limited disease, but a few cases may have severe complications. This retrospective study was to explore the epidemiologic and clinical characteristics of IM associated with Epstein-Barr virus infection (EBV-IM) in children.

METHODS

hospitalized patients with EBV-IM were enrolled during January 2005 to October 2008 in Beijing Children's Hospital Affi liated to Capital Medical University. All patients were divided into four groups: <1 year (group I), 1 to 3 years (group II), 3 to 6 years (group III), and ≥ 6 years (group IV). The epidemiology and clinical characteristics were compared among the four groups.

RESULTS

totally 418 patients were enrolled, with 245 boys and 173 girls. Fever, lymphadenopathy and pharyngitis were three main manifestations of the patients. The incidences of hepatomegaly, splenomegaly and rash were higher in the patients aged below 6 years, and with age increment the incidences lowered. In contrast, the patients aged <1 year had the lowest incidence of tonsillopharyngitis. The total white blood cell count was higher in the infantile group than in the other groups (P=0.038). The infantile group had significantly lower levels of serum alanine aminotransferase and aspartate aminotransferase than the older groups (P=0.007 and P=0.012 respectively). The percentage of CD4(+) T cell subset decreased and the percentage of CD8(+) T cell subset increased with age increment.

CONCLUSIONS

the incidence of EBV-IM peaked in children at age of 4 to 6 years in Northern China. Most of the patients had the classic triad of fever, lymphadenopathy and pharyngitis. Clinical symptoms, signs, laboratory findings and complications of patients varied with ages.