AIM： To determine the causative agents of spontaneous bacterial peritonitis （SBP） in children with liver disease and ascites in our center. METHODS： During a 2.5 year period, from September 2003 to March 2006, 12 ...AIM： To determine the causative agents of spontaneous bacterial peritonitis （SBP） in children with liver disease and ascites in our center. METHODS： During a 2.5 year period, from September 2003 to March 2006, 12 patients with 13 episodes of SBP were studied. In all cases at the time of admission serum albumin and glucose, urinalysis and urine culture was performed. Analysis [white blood cell （WBC） count with differential, albumin, glucose], gram stain, culture by BACTEC method and antibiogram was done on ascitic fluids. Abdominal paracentesis was repeated after 48 h of antibiotic therapy for bacteriologic assay. The patients were followed for at least three months in a gastroenterology clinic. RESULTS： There were 7 girls （58%） and 5 boys （42%） with a median age of 5.2 years （range, 6 mo to 16 years）. All cases had positive ascitic fluid culture. Gram stain was positive in 5 （38.5%） of them. The isolated organisms were S. pneumoniae in 5 （38.5%）, E. coli in 2 （15.3%）, S. viridans in 2 （15.3%）, and K. pneumoniae, H. influenza, Enterococci, and nontypable Streptococcus each in one （7.7%）. All of them except Enterococci were sensitive to ciprofloxacin and ceftriaxone. All ascitic fluid cultures were negative after 48 h of antibiotic therapy. CONCLUSION： S. pneumoniae is the most common cause of SBP in the pediatric age group and we recommend a third generation cephalosporine （e.g., Ceftriaxlone or Cefotaxime） for empirical therapy in children with SBP.展开更多
Biofilm-associated infections are difficult to treat in the clinics because the bacteria embedded in biofilm are ten to thousand times more resistant to traditional antibiotics than planktonic ones.Here,a smart hydrog...Biofilm-associated infections are difficult to treat in the clinics because the bacteria embedded in biofilm are ten to thousand times more resistant to traditional antibiotics than planktonic ones.Here,a smart hydrogel comprised of aminoglycoside antibiotics,pectinase,and oxidized dextran was developed to treat local biofilm-associated infections.The primary amines on aminoglycosides and pectinase were reacted with aldehyde groups on oxidized dextran via a pH-sensitive Schiff base linkage to form the hydrogel.Upon bacterial infection,the increased acidity triggers the release of both pectinase and aminoglycoside antibiotics.The released pectinase efficiently degrades extracellular polysaccharides surrounding the bacteria in biofilm,and thus greatly sensitizes the bacteria to aminoglycosides.The smart hydrogel efficiently eradicated biofilms and killed the embedded bacteria both in vitro and in vivo.This study provides a promising strategy for the treatment of biofilm-associated infections.展开更多
文摘AIM： To determine the causative agents of spontaneous bacterial peritonitis （SBP） in children with liver disease and ascites in our center. METHODS： During a 2.5 year period, from September 2003 to March 2006, 12 patients with 13 episodes of SBP were studied. In all cases at the time of admission serum albumin and glucose, urinalysis and urine culture was performed. Analysis [white blood cell （WBC） count with differential, albumin, glucose], gram stain, culture by BACTEC method and antibiogram was done on ascitic fluids. Abdominal paracentesis was repeated after 48 h of antibiotic therapy for bacteriologic assay. The patients were followed for at least three months in a gastroenterology clinic. RESULTS： There were 7 girls （58%） and 5 boys （42%） with a median age of 5.2 years （range, 6 mo to 16 years）. All cases had positive ascitic fluid culture. Gram stain was positive in 5 （38.5%） of them. The isolated organisms were S. pneumoniae in 5 （38.5%）, E. coli in 2 （15.3%）, S. viridans in 2 （15.3%）, and K. pneumoniae, H. influenza, Enterococci, and nontypable Streptococcus each in one （7.7%）. All of them except Enterococci were sensitive to ciprofloxacin and ceftriaxone. All ascitic fluid cultures were negative after 48 h of antibiotic therapy. CONCLUSION： S. pneumoniae is the most common cause of SBP in the pediatric age group and we recommend a third generation cephalosporine （e.g., Ceftriaxlone or Cefotaxime） for empirical therapy in children with SBP.
基金the National Key R&D Program of ChinaSynthetic Biology Research(2019YFA0904500)+1 种基金the National Natural Science Foundation of China(21725402 and51672191)the Natural Science Foundation of Shanghai(19ZR1415600)。
文摘Biofilm-associated infections are difficult to treat in the clinics because the bacteria embedded in biofilm are ten to thousand times more resistant to traditional antibiotics than planktonic ones.Here,a smart hydrogel comprised of aminoglycoside antibiotics,pectinase,and oxidized dextran was developed to treat local biofilm-associated infections.The primary amines on aminoglycosides and pectinase were reacted with aldehyde groups on oxidized dextran via a pH-sensitive Schiff base linkage to form the hydrogel.Upon bacterial infection,the increased acidity triggers the release of both pectinase and aminoglycoside antibiotics.The released pectinase efficiently degrades extracellular polysaccharides surrounding the bacteria in biofilm,and thus greatly sensitizes the bacteria to aminoglycosides.The smart hydrogel efficiently eradicated biofilms and killed the embedded bacteria both in vitro and in vivo.This study provides a promising strategy for the treatment of biofilm-associated infections.
