Description
A 24-year-old woman with no notable medical history visited a clinic because of fever, sore throat and posterior cervical adenopathy since 3 days. Her body temperature was 38°C. Ampicillin was prescribed for sore throat and adenopathy. Four days later, she developed arthralgia, eyelid oedema and rash all over her body, except on her eyelids, and was referred to our hospital. Physical examination revealed a temperature of 38°C, blood pressure of 102/60 mm Hg and a regular pulse rate of 92 bpm; further, her anterior and posterior cervical lymph nodes were palpable. The systemic rash was clearly defined, maculopapular and pruritic in nature, and was accompanied with slight fever (figures 1 and 2). In addition, mild splenomegaly was observed. Blood tests showed liver dysfunction and atypical lymphocytes. Results of blood testing conducted during the initial visit revealed a pattern of prior infection with measles and rubella. Results of tests for Epstein-Barr virus (EBV)-vascularised composite allografts (VCA) IgM and IgG were positive, whereas that for Epstein-Barr nuclear antigen (EBNA) was negative. The paired serum was positive for EBNA; thus, diagnoses of infectious mononucleosis caused by EBV primary infection and skin rash caused by ampicillin were made. The skin rash began to disappear by about 1 week, and it improved in over about 3 months.
Figure 1.
Rash on the face.
Figure 2.
Rash on the trunk.
Administration of ampicillin to a patient with infectious mononucleosis caused by EBV primary infection should be avoided. If ampicillin is administered, the patient has a high probability of developing a skin rash several days after the administration.1 2
Learning points.
Clinicians should recognise that a pruritic eruption will develop by ampicillin administration in 90–100% of patients with Epstein-Barr virus primary infection.
The skin rash was systemic and clearly defined, maculopapular and pruritic in nature; it was accompanied with slight or moderate fever.1
Footnotes
Contributors: TK contributed to the writing of the manuscript. YU contributed to the drafting of the manuscript.
Competing interests: None.
Patient consent: Obtained.
Provenance and peer review: Not commissioned; externally peer reviewed.
References
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