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When Infections Co-exist: Infectious Mono and Diphtheria
Canadian Family Physician Medecin De Famille Canadien
|February 3, 2011
Summary
This case study highlights a patient initially diagnosed with infectious mononucleosis who developed a rash after amoxicillin treatment. The patient also had a concurrent diphtheria infection, emphasizing careful antibiotic selection.
Area of Science:
- Infectious Diseases
- Clinical Microbiology
Background:
- Infectious mononucleosis is a common viral illness.
- Diphtheria is a serious bacterial infection caused by Corynebacterium diphtheriae.
Purpose of the Study:
- To report a case of infectious mononucleosis with a coincidental pharyngeal infection of toxigenic C. diphtheriae.
- To discuss the appropriate antibiotic management in such cases.
Main Methods:
- Clinical presentation and patient history.
- Laboratory investigations including throat cultures.
- Monitoring of patient's response to antibiotic treatment.
Main Results:
- Patient presented with symptoms suggestive of infectious mononucleosis.
- Throat swab culture confirmed a toxigenic strain of C. diphtheriae.
- Patient developed a rash, likely an amoxicillin-induced reaction.
Conclusions:
- Antibiotics are not indicated for infectious mononucleosis unless bacterial co-infections are present.
- Ampicillin-amoxicillin should be avoided in patients with suspected infectious mononucleosis due to potential adverse reactions.
- Careful consideration of antibiotic choice is crucial when bacterial pathogens are identified.
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