Objective:To compare the clinical and imaging features of air-borne and blood-borne Staphylococcus aureus pneumonia(SAP) in children.Methods:The clinical data of 54 children with SAP from 2015 to 2020 at Shengjing Hospital of China Medical University were retrospectively analyzed, including 28 cases in air-borne group and 26 cases in blood-borne group.The general data, clinical manifestations, laboratory tests and imaging data of the patients in two groups were compared.Results:There were no significant differences in age, sex and onset season between air-borne group and blood-borne group( P>0.05). The incidences of cough, dyspnea and lung rale in air-borne group were significantly higher than those in blood-borne group( P<0.05). Air-borne group was often complicated with acute respiratory distress syndrome and respiratory failure, but extrapulmonary infection was rare.The symptoms and signs of respiratory tract in patients from the blood-borne group were not obvious, and more complicated with other parts or systemic infection and poisoning symptoms, such as septic shock, skin and soft tissue infection, osteomyelitis, etc.The patients with leukocyte decrease(<4.0×10 9/L) in blood-borne group were more than those patients from air-borne group.The median values of C-reactive protein, procalcitonin and interleukin -6 in blood-borne group were higher than those in air-borne group, but there were no statistical differences( P>0.05). On imaging, the incidences of massive pulmonary exudation and consolidation in air-borne SAP were higher, while the incidences of pulmonary nodules and air sacs in blood-borne SAP were higher( P<0.05). Conclusion:The clinical and imaging manifestations of air-borne SAP and blood-borne SAP are different.Respiratory symptoms of air-borne SAP are prominent, however, systemic poisoning symptoms of blood-borne SAP are severe.As for imaging, air-borne SAP is more prone to large lung consolidation, while blood-borne SAP is more prone to lung nodules and air bags.

In recent years, the incidence of deep vein thrombosis(DVT) in children is on the rise.If the embolus falls off, it will cause complications such as pulmonary embolism, which may cause disability and death.Therefore, early prevention and timely treatment of DVT are important to improve survival rate.Due to the complexity and particularity of children′s conditions and the lack of large-scale trials and statistics, there is no uniform standards at home and abroad.This article combined some current clinical advances to provide a reference for the prevention, diagnosis and treatment of DVT.

It is reviewed in this article that the current situation of patients′ adherence to anticoagulation with warfarin after mechanical heart-valve replacement and the measures to improve the situation. Now the adherence situation of the patients is not satisfying to some extent. There are many things we can do to improve the adherence of patients and get a better anticoagulant effect, such as enhancing the health education according to the different background of patients, strengthening the social and psychological support, carrying out effective follow-up and information communication with the patients, the use of the medicine branch box, importing the foreign managing model of self-test and self-manage, expanding the special outpatient service for anticoagulation instruction. We may get a better adherence of anticoagulation with warfarin and improve the prognosis of patients.

Bacillus sp. TSH1 is a butanol-producing microorganism newly isolated in our laboratory; it can grow and ferment under facultative anaerobic conditions, while sharing similar fermentation pathways and products with Clostridium acetobutylicum. To illustrate the relationships between the products and the enzyme activities in Bacillus sp. TSH1, key butanol- and ethanol-forming enzymes were studied, including butyraldehyde dehydrogenase, butanol dehydrogenase and alcohol dehydrogenase. The activities of the three enzymes increased rapidly after the initiation of fermentation. Activities of three enzymes peaked before 21 h, and simultaneously, product concentrations also began to increase gradually. The maximum activity of alcohol dehydrogenase was 0.054 U/mg at 12 h, butyraldehyde dehydrogenase 0.035 U/mg at 21 h and butanol dehydrogenase 0.055 U/mg at 15 h. The enzyme activities then decreased, but remained constant at a low level after 24 h, while the concentrations of butanol, acetone, and ethanol continued increasing until the end of the fermentation. The results will attribute to the understanding of the butanol metabolic mechanism, and provide a reference for further study of a facultative Bacillus metabolic pathway.
Alcohol Dehydrogenase ; metabolism ; Alcohol Oxidoreductases ; metabolism ; Aldehyde Oxidoreductases ; metabolism ; Anaerobiosis ; Bacillus ; classification ; genetics ; metabolism ; Butanols ; metabolism ; Fermentation ; Metabolic Networks and Pathways