A study on the relationship between haemophilus influenzae b and acute respiratory
infection Liu Xiuyun, Jiang Zaifang, Yang Yonghong, et al. beijing Children′s Hospital
affiliated to Capital University of Medical Sciences, Beijing 100045
【Abstract】 Objective to study the role of Haemophilus influenzae (HI) in the acute
respiratory tract infection.Methods The Mab-enzyme linked immunosorbent assay was
used to detect Haemophilus influenzae type b outer membrane protein (Hib OMP) antigen
in the serum and urine of 70 cases of pneumonia, 32 cases of brochitis, 36 cases of acute
upper respiratory tract infection, and 45 healthy controls. Patients with pneumonia were
further studied by the assay of Hib OMP antibody.Results eighteen out of 70 cases of
pneumonia, 4 out of 32 cases of bronchitis and 4 out of the 36 cases of acute upper respiratorytract infection were Hib OMP antigen positive. However, only 1 out of 45 healthy controls was Hib OMP antigen positive. The positive rate for Hib antigen in cases of pneumonia was much higher than that of healthy controls (c2=10.960, p〈0.01). By means of Hib OMP antibody assay, 18/70(25.7%) cases of pneunmonia were found positive. A total of24 cases of pneumonia including 12 cases had both positive Hib OMP antigen and its antibody, 6 cases positive Hib OMP antigen only and another 6 positive Hib OMP antibody only were revealed to have HI infection.Conclusion 11.1% of cases of upper respiratory tract infection, 12.5% of cases of bronchitis and 34.3% of cases of pneumonia had Hib infection. A combined application of Hib OMP antibody and antigen detection can enhance the detective rate of Hib infection.