Background:The prevalence of Mycoplasma pneumoniae pneumonia has increased considerably in recent years.To evaluate the efficacy of combined treatment of azithromycin with intravenous immunoglo-bulin (IVIG) or methylp...Background:The prevalence of Mycoplasma pneumoniae pneumonia has increased considerably in recent years.To evaluate the efficacy of combined treatment of azithromycin with intravenous immunoglo-bulin (IVIG) or methylprednisolone in children with refractory Mycoplasma pneumoniae pneumonia (RMPP).Methods:Children with RMPP were randomly allocated to group A [intravenous azithromycin (IA)+ methylprednisolone],group B (IA+IVIG) or group C (IA alone).Following a 7-day treatment,group C patients were randomly separated into two sub-groups:group C1 (IA+methylprednisolone) and group C2 (IA+IVIG).Temperature,respiratory symptoms and signs were examined.The average febrile period after treatment (F2),average total febrile period (F3),infiltration absorption,atelectasis resolution,pleural effusion disappearance were determined.The levels of C-reactive protein (CRP),D-dimer,and lactate dehydrogenase (LDH) were measured.Results:Seven days after enrollment,the average F2 after treatment of group A was the shortest.Compared with the control group C,the combined treatment group A and B showed higher rates of infiltration absorption,atelectasis resolution and pleural effusion disappearance,while lower levels of serum CRP,D-dimer and LDH.Fourteen days after enrollment,all children with combined therapy clinically improved,and presented better laboratory results.Group C1 showed shorter F3 and lower levels of CRP and LDH than those of group C2.Overall,group A showed the shortest F3,also has the lowest CRP and LDH.Conclusions:Azithromycin with IVIG or methylprednisolone was better treatment for children with RMPP than azithromycin alone.IVIG treatment may be beneficial,especially when the efficacy of corticosteroids is insecure,thus could be considered as an alternative of primary therapeutic approaches.展开更多
Background Mycoplasma pneumonia （M.pneumoniae） is one of the key pathogens of community-acquired pneumonia.A global pandemic of M.pneumoniae has occurred since 2010.The aim of this study was to survey the prevalence...Background Mycoplasma pneumonia （M.pneumoniae） is one of the key pathogens of community-acquired pneumonia.A global pandemic of M.pneumoniae has occurred since 2010.The aim of this study was to survey the prevalence of M.pneumoniae in children in Beijing from 2007-2012.Methods A total of 3 073 clinical specimens were obtained from pediatric patients with respiratory tract infections from January 2007 to December 2012,and examined by nested polymerase chain reaction.PCR products were visualized by 2％ agarose gel electrophoresis,positive products sequenced,and compared with reference sequences in GenBank.Macrolide resistance-associated mutations were also detected for some positive samples.Results Of the 3 073 specimens,588 （19.13％） were positive for M.pneumoniae,12.4％ of which were accompanied by viral infections.Positive rates for M.pneumoniae were highest in 2007 and 2012,showing a significant difference when compared with other years.Infections tended to occur in autumn and winter and positive rates were significantly higher for children aged 3-16.The rate of macrolide resistance-associated mutations was 90.7％,and the predominant mutation was an A→G transition （89.92％） at position 2063 in domain V of the 23S rRNA gene.Conclusions M.pneumoniae outbreaks occurred in 2007 and 2012 in pediatric patients in Beijing,which is consistent with the global prevalence of M.pneumoniae.M.pneumoniae can cause multi-system infections in children,and may be accompanied with viral infections.We determined that school-age children are more susceptible to this disease,particularly in autumn and winter.Gene mutations associated with macrolide resistance were very common in M.pneumoniae-positive specimens during this period in Beijing.展开更多
Background To investigate the clinical features of necrotizing pneumonia (NP) caused by refractoryMycoplasma pneumo-niae pneumonia (RMPP). Methods A retrospective observational study was carried out in patients with N...Background To investigate the clinical features of necrotizing pneumonia (NP) caused by refractoryMycoplasma pneumo-niae pneumonia (RMPP). Methods A retrospective observational study was carried out in patients with NP caused by RMPP who were admitted to our hospital from January 2008 to December 2015, and the clinical manifestations, laboratory data, imaging performances, hospital courses and outcomes were analyzed. Results Twenty-five patients with NP caused by RMPP were collected, with a median age of 5.1 (4.0–7.9) years. The mean duration of fever and hospital stay was 21.0 ± 8.9 and 19.9 ± 9.9 days, respectively. The levels of lactate dehydrogenase (LDH), C-reactive protein, interleukin (IL)-6, IL-10 and interferon-gamma were elevated. Meanwhile, the pleural fluid cell count, LDH and protein were also increased. 80.0% of the patients had pleural effusion;and a high incidence of lobar atelectasis and pulmonary consolidation was found the patients. The mean duration from the onset of symptoms to the discovery of necrotic lesions was 21.0 ± 6.9 days. 80.0% of the patients were administrated corticosteroids, and bronchoalveolar lavage was extracted separately from all patients. Of the 20 patients who presented with pleural effusion, 11 underwent thoracocentesis alone and 2 underwent chest drainage. All patients received prolonged courses of antibiotics (32.2 ± 8.7 days). All patients were dischaged home and recovered without surgical intervention;and chest lesions were resolved or only minimal residual fibrotic changes were residual within 3.0 (2.0–6.0) months. Conclusions Necrotizing pneumonia caused by RMPP is severe, however, self-limiting and reversible. Good outcomes can be achieved with appropriate management.展开更多
基金This study was funded by Natural Science Foundation of Liaoning Province of China(2013021017).
文摘Background:The prevalence of Mycoplasma pneumoniae pneumonia has increased considerably in recent years.To evaluate the efficacy of combined treatment of azithromycin with intravenous immunoglo-bulin (IVIG) or methylprednisolone in children with refractory Mycoplasma pneumoniae pneumonia (RMPP).Methods:Children with RMPP were randomly allocated to group A [intravenous azithromycin (IA)+ methylprednisolone],group B (IA+IVIG) or group C (IA alone).Following a 7-day treatment,group C patients were randomly separated into two sub-groups:group C1 (IA+methylprednisolone) and group C2 (IA+IVIG).Temperature,respiratory symptoms and signs were examined.The average febrile period after treatment (F2),average total febrile period (F3),infiltration absorption,atelectasis resolution,pleural effusion disappearance were determined.The levels of C-reactive protein (CRP),D-dimer,and lactate dehydrogenase (LDH) were measured.Results:Seven days after enrollment,the average F2 after treatment of group A was the shortest.Compared with the control group C,the combined treatment group A and B showed higher rates of infiltration absorption,atelectasis resolution and pleural effusion disappearance,while lower levels of serum CRP,D-dimer and LDH.Fourteen days after enrollment,all children with combined therapy clinically improved,and presented better laboratory results.Group C1 showed shorter F3 and lower levels of CRP and LDH than those of group C2.Overall,group A showed the shortest F3,also has the lowest CRP and LDH.Conclusions:Azithromycin with IVIG or methylprednisolone was better treatment for children with RMPP than azithromycin alone.IVIG treatment may be beneficial,especially when the efficacy of corticosteroids is insecure,thus could be considered as an alternative of primary therapeutic approaches.
基金This work was supported by the grants from the Beijing Natural Science Foundation （No.7112019） and the Beijing City Talent Training Project Fund （No.20071A0303200118）.
文摘Background Mycoplasma pneumonia （M.pneumoniae） is one of the key pathogens of community-acquired pneumonia.A global pandemic of M.pneumoniae has occurred since 2010.The aim of this study was to survey the prevalence of M.pneumoniae in children in Beijing from 2007-2012.Methods A total of 3 073 clinical specimens were obtained from pediatric patients with respiratory tract infections from January 2007 to December 2012,and examined by nested polymerase chain reaction.PCR products were visualized by 2％ agarose gel electrophoresis,positive products sequenced,and compared with reference sequences in GenBank.Macrolide resistance-associated mutations were also detected for some positive samples.Results Of the 3 073 specimens,588 （19.13％） were positive for M.pneumoniae,12.4％ of which were accompanied by viral infections.Positive rates for M.pneumoniae were highest in 2007 and 2012,showing a significant difference when compared with other years.Infections tended to occur in autumn and winter and positive rates were significantly higher for children aged 3-16.The rate of macrolide resistance-associated mutations was 90.7％,and the predominant mutation was an A→G transition （89.92％） at position 2063 in domain V of the 23S rRNA gene.Conclusions M.pneumoniae outbreaks occurred in 2007 and 2012 in pediatric patients in Beijing,which is consistent with the global prevalence of M.pneumoniae.M.pneumoniae can cause multi-system infections in children,and may be accompanied with viral infections.We determined that school-age children are more susceptible to this disease,particularly in autumn and winter.Gene mutations associated with macrolide resistance were very common in M.pneumoniae-positive specimens during this period in Beijing.
基金This work was partially supported by Grants from Zheji-ang Province Natural Science Foundation of China(LY17H100004,LY18H100002)Social Development Program of Science Technology Department of Zhejiang Province(2015C33127)the Key Projects of Zhejiang Medicine and Health Research Fund(no.2018268955).
文摘Background To investigate the clinical features of necrotizing pneumonia (NP) caused by refractoryMycoplasma pneumo-niae pneumonia (RMPP). Methods A retrospective observational study was carried out in patients with NP caused by RMPP who were admitted to our hospital from January 2008 to December 2015, and the clinical manifestations, laboratory data, imaging performances, hospital courses and outcomes were analyzed. Results Twenty-five patients with NP caused by RMPP were collected, with a median age of 5.1 (4.0–7.9) years. The mean duration of fever and hospital stay was 21.0 ± 8.9 and 19.9 ± 9.9 days, respectively. The levels of lactate dehydrogenase (LDH), C-reactive protein, interleukin (IL)-6, IL-10 and interferon-gamma were elevated. Meanwhile, the pleural fluid cell count, LDH and protein were also increased. 80.0% of the patients had pleural effusion;and a high incidence of lobar atelectasis and pulmonary consolidation was found the patients. The mean duration from the onset of symptoms to the discovery of necrotic lesions was 21.0 ± 6.9 days. 80.0% of the patients were administrated corticosteroids, and bronchoalveolar lavage was extracted separately from all patients. Of the 20 patients who presented with pleural effusion, 11 underwent thoracocentesis alone and 2 underwent chest drainage. All patients received prolonged courses of antibiotics (32.2 ± 8.7 days). All patients were dischaged home and recovered without surgical intervention;and chest lesions were resolved or only minimal residual fibrotic changes were residual within 3.0 (2.0–6.0) months. Conclusions Necrotizing pneumonia caused by RMPP is severe, however, self-limiting and reversible. Good outcomes can be achieved with appropriate management.
