Viral Infection Related to The Appearance of Acute Bacterial Respiratory Tract Infections

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  • KOBASHI Yoshihiro
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • SUNAGAWA Takako
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • ASAOKA Naoko
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • OHBA Hideo
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • YONEYAMA Hirohide
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • OKIMOTO Niro
    Division of Respiratory Diseases, Department of Medicine, Kawasaki Medical School Kawasaki Hospital
  • SOEJIMA Rinzo
    Kawasaki Medical Welfare University

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Other Title
  • 呼吸器感染症の発症に関与したウイルス
  • コキュウキ カンセンショウ ノ ハッショウ ニ カンヨ シタ ウイルス

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Abstract

To investigate what viruses are related to acute bacterial respiratory tract infections, we prospectively evaluated 113 cases with respiratory tract infections (always accompanying by purulent sputum) experienced between July 1998 and March 2000.<BR>Acute viral infections were detected in 25 cases (22%); 10 cases of influenza A virus and 6 cases of respiratory syncytial (RS) virus. The epidemiology of the influenza A virus and RS virus was mainly identified as from December to February in both winter seasons. A bacteriological examination of sputum cultures isolated 12 cases of Streptococcus pneumoniae and 10 cases of Haemophilus influenzae during the same periods and mixed infections of both viruses and bacteria were recognised in 16 cases (14%).<BR>These results suggest a significantly high percentage of mixed infections of both viruses and bacteria. However, it was unkown whether the patients with acute bacterial respiratory infections had been infected with viruses prior to the bacterial infections. The frequency of appearence of respiratory tract infections tended to increase with the seasonable epidemiology of viral infections.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 74 (11), 949-953, 2000

    The Japanese Association for Infectious Diseases

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