Résumé
Objectives: To evaluate the correlation between mycoplasma pneumonia infection and the severity of asthma as well as asthma control, to help physicians in respiratory department better make treatment strategies. Methods: Since January 2012 to May 2014, we consecutively recruited 149 out-patients diagnosed with asthma in acute or convalescent phase from the department of respiratory medicine of our hospital. The pulmonary function tests, sputum induction examination, measurement of IgM, IgG and IgE in serum, evaluation of asthma control were carried out for all the included patients. Results: In 78 cases with asthma in acute phase, mycoplasma pneumonia infection was confirmed in 38 cases [48.71%], and in 71 cases in stable state, mycoplasma pneumonia infection was confirmed in 22 cases [30.98%]. There was significant difference in the rate of mycoplasma pneumonia infection between the two groups [p<0.05].The FEV1% Pred and ACT scores were significantly lower in mycoplasma pneumonia infection cases than those in no mycoplasma pneumonia infection cases [p<0.05], while the eosinophil count and IgE in serum were significantly higher in mycoplasma pneumonia infection cases [p<0.05]. Conclusions: Mycoplasma pneumonia infection may play more important role in the occurrence of acute asthma, and it can lead to decreased pulmonary function, difficulty in controlling asthma and more severe airway inflammation
Résumé
To determine the risk factors associated with persistent airflow limitation in patients with asthma. This study was designed and carried out in the department of respiratory medicine, fourth People's Hospital of Jinan City, Shandong province, China between Jan 2012 and Dec 2012. Three hundred and six asthma patients participating in the study were divided into persistent airflow limitation group [PAFL] and no persistent airflow limitation group [NPAFL]. The patients participated in pulmonary function tests and sputum induction examination. The clinical data including age, gender, onset age, disease course, smoking history, family history, regular corticosteroid inhalation, hospitalization history and presence of atopy were collected. In 306 patients, 128 [40.5%] were included in PAFL group and 178 [59.5%] in NPAFL group. Multivariate analysis demonstrated smoking [>/= 10 pack-years; OR, 7.1; 95% CI, 1.8 to 31.2], longer asthma duration [>/= 20 years] [OR, 6.3; 95% CI, 1.7 to 28.5], absence of regular corticosteroid inhalation [OR, 3.5; 95% CI, 1.1 to 14.5] and neutrophil in induced sputum >/= 65% [OR, 1.8; 95% CI, 1.0 to 2.8] were independent risk factors for PAFL. Smoking, longer asthma duration and increased neutrophil in induced sputum are risk factors for PAFL, while regular corticosteroid inhalation is protective factor. Smoking cessation and regular corticosteroid inhalation may play an important role in preventing the occurrence of persistent airflow limitation group [PAFL]