Clinical characteristics of respiratory virus infection in children admitted to an intensive care unit

PURPOSE: To investigate the clinical characteristics and the risk factors for mechanical ventilator treatment and incidence of complications in children admitted to an intensive care unit (ICU) with detected respiratory viruses. METHODS: Eighty-two patients who were detected respiratory viruses by multiplex real-time polymerase chain reaction from nasopharyngeal aspirates were enrolled among the 123 children admitted to ICU with acute respiratory manifestations during the study period from January 2006 to December 2012. RESULTS: Detection rate of respiratory viruses were 66% and 13 patients (16%) had two viruses isolated. The most common respiratory virus isolated was respiratory syncytial virus (RSV) (35%) followed by rhinovirus (19%), adenovirus (13%), parainfluenza virus (11%), influenza virus (11%), human metapneumovirus (6%), and human coronavirus (5%). Pneumonia (70%) was the most common clinical diagnosis. The mean age of patient with RSV infection was the youngest and with influenza virus infection was the oldest among other viruses infection (mean+/-standard deviation, 5.9+/-10.1 months vs. 51.0+/-26.1 months; P=0.01). Forty Patients (49%) who had the underlying diseases were not associated with incidence of mechanical ventilator treatment and complications. Bacterial coinfection with respiratory virus was the significant risk factor of mechanical ventilator care and incidence of complications (odds ratio [OR], 50.003; 95% confidence interval [CI], 3.955-632.144; P=0.003, and OR, 15,569; 95% CI, 1.803-134.452; P=0.013). CONCLUSION: The significant morbidity of pediatric patient admitted to ICU with respiratory virus infection (RVI) was associated with bacterial coinfection. Furthermore, multicenter study should be performed to investigate the epidemiology of RVI in pediatric patients admitted to ICU in domestic.

Prophylactic Administration of Surfactant with Nasal Continuous Positive Airway Pressure in Preterm Infants with Gestational Age Less than 30 Weeks

PURPOSE: This study was performed to investigate the effectiveness and safety of the prophylactic administration method of surfactant, followed by rapid extubation to nasal CPAP (nCPAP) in very preterm infants. METHODS: Thirty-three preterm infants with 24-29 weeks gestational age (GA) were treated with the method of prophylactic administration of surfactant by a brief intubation within 15 minutes after birth and rapid extubation to nCPAP for the treatment of respiratory distress. The variables and complications related to oxygen therapy and mechanical ventilation (MV) were compared with those of 24 historical control infants with comparable GA, treated with the rescue surfactant administration with prolonged MV for the respiratory distress syndrome (RDS). RESULTS: Prophylactic surfactant with nCPAP did not reduce the total durations of oxygen therapy and MV, compared with the rescue surfactant with MV (P=0.622 P=122, respectively). The incidence of death and BPD at 36 weeks postmenstrual age (PMA) and other complications related to oxygen therapy and MV were not increased in the infants treated with prophylactic surfactant with nCPAP despite the lower GA and birth weight. In the subgroup analysis for infants with 27-29 weeks of GA, the total duration of MV tended to decrease in infants treated with prophylactic surfactant with nCPAP (Odd ratio, 0.93, 95% Confidence interval, 0.87, 1.00, P=0.051). CONCLUSION: Prophylactic surfactant administration followed by rapid extubation to nCPAP tended to reduce the duration of MV in infants with GA of 27-29 weeks, compared with the rescue surfactant administration with prolonged MV for RDS.

Chlamydia trachomatis respiratory infection in Korean young infants / 소아과

PURPOSE: Chlamydia trachomatis is one of the most common sexually transmitted diseases and is also a cause of pneumonia in infants. Respiratory infections by respiratory viruses are also common for infants. The objectives of this study were to identify the clinical manifestations and to determine the prevalence of C. trachomatis respiratory infections and coinfections by respiratory viruses in infants younger than 6 months of age. METHODS: For this study, we enrolled 6 months or younger infants who were admitted to the Dankook University Hospital between January 2002 and July 2007, with respiratory symptoms. Nasopharyngeal aspirates or throat swabs were collected within s d of hospitalization and C. trachomatis was detected using polymerase chain reaction (PCR). Patients who tested positive underwent multiplex PCR for respiratory viruses. RESULTS: A total of 690 patients underwent chlamydial PCR testing and 36 (5.2%) had positive results. Of the 36, 28 (78%) were male; 30 were vaginally delivered. From the 36 patients positive for C. trachomatis, 26 underwent multiplex respiratory viral PCR; 12 were coinfected with viruses. Respiratory syncytial virus (RSV) was the most frequent pathogen that was detected in 6 patients. Increased C-reactive protein and fever were significant in patients coinfected with respiratory viruses. CONCLUSION: C. trachomatis can infected in infants delivered by cesarean section as well as in 6 months old or younger infants. Infant with C. trachomatis respiratory infections can also be coinfected with respiratory infection also coinfected with respiratory viruses. Further studies are needed to better understand the prevalence rates of the this infection and its coinfection rate with respiratory viruses.