An infant with concurrent serotype 6C invasive pneumococcal disease and infectious mononucleosis

Publication date: Available online 17 July 2017
Source:Journal of Infection and Chemotherapy
Author(s): Naoko Nishikawa-Nakamura, Takafumi Okada, Keiko Nishimura, Tsuyako Iwai, Kimiko Ubukata, Satoshi Iwata, Asayuki Iwai
Streptococcus pneumoniae is a main causative agent of serious invasive bacterial infections. However, concurrent infection with invasive pneumococcal disease (IPD) and viral infectious mononucleosis (IM) is rare. We report an infant with serotype 6C infection causing IPD occurring simultaneously with IM. A previously healthy 11-month-old girl referred to our hospital because of fever, leukopenia, and elevated C-reactive protein presented to us with disturbance of consciousness, tachycardia, tachypnea and agranulocytosis. Other findings included tonsillitis with purulent exudates and white spots, bilateral cervical adenopathy, and hepatosplenomegaly. We diagnosed her illness as sepsis and administered a broad-spectrum antibiotic, an antiviral agent, and granulocyte transfusions. After treatment was initiated, fever gradually decreased and general condition improved. IPD was diagnosed based upon isolation of S. pneumoniae of serotype 6C from blood cultures obtained on admission. Concurrently the girl had IM, based upon quantitation of Epstein-Barr viral DNA copies in blood and fluctuating serum antibody titers. Although simultaneous IPD and IM is a rare occurrence, this possibility is important to keep in mind.



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