We encountered two cases of Type A influenza infection complicated by a bacterial infection of the epipharynx. Both cases tested positive forType A influenza based on a rapid influenza diagnosis, and although an endoscopic examination revealed no inflammatory findings in the oropharynx, both reddening and pus were observed in the epipharynx. Blood tests showed an increased white blood cell count (neutrophil dominant), and the results of a bacterial test of the epipharynx were 5 + for
Haemophilus parainfluenzae, and therefore the cases were diagnosed to have Type A influenza infection complicated by a bacterial infection of the epipharynx. In both cases, the oropharyngeal findings were normal, and the pharyngeal pain was not severe, and therefore these cases could have been sufficiently treated by solely administering an appropriate anti-influenza drug and conservatively monitoring the case in routine clinical practice. Even when the subjective and systemic findings are compatible with influenza, the presence of pharyngeal pain suggests that not only rapid testing for influenza, but also an endoscopic examination should be performed, while bearing in mind the possibility of a coexisting bacterial infection of the epipharynx.
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