ABSTRACT
Objective To understand the etiological characteristics and risk factors of respiratory virus infection in children with bronchial asthma, and to provide theoretical basis for the prevention and treatment of respiratory virus infection in children with bronchial asthma. Methods A total of 374 children with bronchial asthma who were treated in Jianyang People's Hospital from December 2018 to December 2020 were enrolled. Pharyngeal swabs were collected from the outpatient children on the day of treatment, and 2 mL of nasopharyngeal secretions were collected from the hospitalized children within 24 hours by negative pressure aspirator. Seven viral antigens including RSV, ADV, IVA, IVB, PIVI, PIV II, and PIV III were detected. According to whether the virus test results were positive or not, they were divided into the experimental group (n=191) and the control group (n=183). Logistic regression analysis was used to screen the risk factors of respiratory virus infection in children with bronchial asthma. Results Among the 374 samples, the virus positive rate was 51.07% (191/374), and the top 3 virus species in the positive samples were RSV, ADV, and PIV III, accounting for 41.36% (79/191), 30.36% (58/191), and 9.42% (18/191), respectively. In addition, IVA accounted for 5.24% (10/191), PIV II accounted for 5.24% (10/191), PIVI accounted for 3.66% (7/191), and IVB accounted for 1.57% (3 /191). The positive rates of virus were 47.96% (94/196) and 54.49% (97/178) in male and female children, respectively, with no significant difference (χ2=1.597，P>0.05). The positive rate of 1~3 years old children was significantly higher than that of >3 years old group (χ2=6.412，P3 times, intravenous glucocorticoid application and onset season were independent risk factors for respiratory virus infection in children with bronchial asthma (P<0.05). Conclusion The infection season of acute respiratory tract infection in children with asthma is mainly concentrated in autumn and winter, with RSV as the main viral pathogen. Targeted preventive measures should be given to children with bronchial asthma who have more than 3 asthma attacks and intravenous glucocorticoid application, which can reduce respiratory virus infection in children with asthma.
ABSTRACT
Objective:To investigate the diagnostic performance of T-SPOT test for pediatric tuberculosis (TB).Methods:The results of T-SPOT and PPD in 67 TB children and 71 TB-excluded children that diagnosed and treated in the People's Hospital of Jianyang from June 2014 to May 2017 were retrospectively analyzed.The diagnostic efficacy and consistency of the two tests, and the diagnostic efficacy of combined examination were evaluated.Results:The sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio, Youden′s index of T-SPOT were 88.1%, 94.4%, 93.7%, 89.3%, 15.6, 0.13, 0.83, respectively.While the above parameters of PPD were 68.7%, 74.6%, 71.9%, 71.6%, 2.71, 0.42, 0.43, respectively.T-SPOT had higher sensitivity, specificity, positive predictive value, negative predictive value compared with PPD, and the differences were statistically significant(χ 2=7.44, 10.54, 10.51, 7.45, all P<0.01). The positive rates of T-SPOT for pulmonary and extra-pulmonary TB were 90.9% and 82.6%, and the difference was not statistically significant ( P>0.05). The positive rate of T-SPOT was higher in 5-18 years old group than that in 0-4 years old group(95.1% vs.76.2 %, χ 2=5.01, P<0.05). The latter group held a diagnostic concordance greater than the former(kappa value 0.78 vs.0.23). The sensitivity of combined tests had no statistically significant difference compared with T-SPOT alone( P>0.05). Conclusion:T-SPOT outperformed PPD in diagnostic assistance of pediatric TB overall.The diagnostic superiority is noticeable in the>4-18 years old other than the 0-4 years old.Compared with T-SPOT alone, combined tests should not be regarded to have increased sensitivity.