CPn infection in patients with diffuse panbronchitis and COPD

Chest. 1998 Oct;114(4):969-71. Related Articles, Links Chlamydia pneumoniae infection in patients with diffuse panbronchiolitis and COPD. Miyashita N, Niki Y, Nakajima M, Kawane H, Matsushima T. Department of Medicine, Kawasaki Medical School, Kurashiki City, Okayama, Japan. STUDY OBJECTIVES: To determine the possible association of Chlamydia pneumoniae infection with diffuse panbronchiolitis (DPB) and with COPD. DESIGN: Prospective case-control study. SETTING: Division of Respiratory Diseasesi, Kawasaki Medical School Hospital. PARTICIPANTS: Fifteen DPB and 77 COPD patients who had acute exacerbations of respiratory conditions and 35 and 120 control subjects, respectively, matched for age, sex, and smoking status. MEASUREMENTS AND RESULTS: Nasopharyngeal swabs and paired serum samples were obtained from all patients and control subjects for isolation and antibody testing of C pneumoniae. C pneumoniae was isolated from one DPB patient and from no COPD patients or control subjects. Serologic evidence of acute C pneumoniae infection was observed in one DPB patient (6.7%) and six COPD patients (7.8%). The prevalence and mean titer of C pneumoniae IgGi and IgA antibodies were significantly higher in COPD patients than in control subjects (p<0.001). However, no such differences were observed between DPB patients and control subjects. CONCLUSIONS: This study showed that C pneumoniae infection may be associated with acute exacerbations of COPD and that chronic C pneumoniae infection is common in COPD but not in DPB.
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Edotorial comment: once again we see that though CPni is ubiquitous it still is associated with exacerbations of chroic disease in some people.