Objective To understand the serotype distribution ,prevalence and antimicrobial susceptibility of Salmonella strains isolatd from diarrhea patients in Dongguan ,Guangdong Province .These data may be useful for disease control and prevention and clinical treatment .Methods From April to December in 2013 ,we collected 1 150 stool specimens from diarrhea patients . Salmonella strains were cultured by using Salmonella selenite brilliant green sulfa enrichment broth and selective chromogenic plates .Antimicrobial susceptibility was tested by ATB microbial identification and drug susceptibility system .Results A total of 72 strains of Salmonella were identified including 21 serotypes .The detection rate was 6 .3% (72/1 150) .Most of the strains were Salmonellatyphimurium (22/72 ,30 .5% )and Salmonellaenteritis (16/72 ,22 .2% ).Forty‐two (58 .3% )of the strains were isolated from the patients under one year of age ,12 (16 .7% ) strains from the patients of 3‐10 years of age ,and 18 (25 .0% ) strains from the patients of at least 20 years old .The results of antimicrobial susceptibility testing showed that 50 .0% of the strains were resistant to piperacillin and 48 .6% resistant to ticarcillin .Conclusions The prevalence of Salmonella typhimurium is the highest in local Salmonella‐associated diarrhea patients ,followed by Salmonella enteritis .Most of the Salmonella diarrhea occurred in the patients under one year of age .Clinicians should strengthen the monitoring of Salmonella in patients with diarrhea , especially in infants and young children , for early detection and treatment so as to reduce complications .

Objective: To investigate the classification, prognosis and causes of acute gastrointestinal injury(AGI) in PICU patients in our hospital. Methods: Patients were included if they had been hospitalized in PICU at least 24 h before the AGI diagnosis from January 2015 to April 2018.Patients were classified according to severity of gastrointestinal dysfunction.Clinical characteristics, pediatric critical illness scores, pediatric logistic organ dysfunction score 2 and 28-day mortality, as well as mechanical ventilation were recorded. Results: A total of 220 patients were enrolled.AGIⅠ-Ⅳ groups included 66(30.0%), 97(44.1%), 37(16.8%)and 20(9.1%) patients, respectively, while primary AGI and secondary AGI included 149(67.7%) and 71 (32.3%)patients, respectively.There was no significant difference among four groups in gender, hospitalization time in PICU and total hospitalization time (P>0.05), but there were significant differences in median age, pediatric critical illness scores, pediatric logistic organ dysfunction score 2 and proportion of mechanical ventilation(P<0.05). Median age(month) was 3 (1, 15), 11 (2, 24), 11 (2, 36), and 4 (0.5, 11.5), respectively in AGI Ⅰ-Ⅳ groups.The total 28-day mortality rate of AGI Ⅰ-Ⅳ groups accounted for 0, 0, 13.2% and 3.2%, respectively. Conclusion Patients in PICU are prone to AGI.AGIⅠand AGI Ⅱare common.The prognosis is associated with classification of AGI.The higher grades of AGI are, the worse prognosis is.The prognosis of AGI Ⅲ is the worst, because of different causes.

OBJECTIVETo evaluate the effects of hepatocyte growth factor (HGF) on the prevention of scar formation and the promotion of wound healing by gene transfer.

METHODSA total of 12 female New Zealand rabbits were used in this study. Rabbits were anesthetized with an intravenous injection of sodium pentobarbital, and identical wounds were made over the ventral surface of each ear. Five circular wounds, 7 mm in diameter, were created in each ear by excision through the skin to the underlying cartilage using sterile technique. After the surgical procedures, 10 of the rabbits were randomly allocated to five groups, with 2 rabbits in each group: Ad-HGF group 1, Ad-HGF group 2, Ad-HGF group 3, Ad-GFP (a reporter gene) group and the solvent group. Immediately after surgery, 6 x 10(7) pfu Ad-HGF, 6 x 10(8) pfu Ad-HGF, 6 x 10(9) pfu of Ad-HGF, 6 x 10(9) pfu of Ad-GFP, or same volume of solvent (PBS, pH 7.2) was applied once to each wound in groups 1 to 5, respectively. One additional rabbit was used to evaluate the transfer efficiency of the adenovirus vector by transferring Ad-GFP (6 x 10(9) pfu) into its wounds. Ice slides of wounds from this animal were observed under fluorescence microscopy. Another additional rabbit was used to evaluate the expression of HGF and TGFbeta1 after transferring Ad-HGF (6 x 10(9) pfu) into each of its wound. Immunohistochemistry was used for detection.

RESULTSThe effect of HGF on reducing excessive dermal scarring was observed by adenovirus-mediated gene transfer. Transfection of the human HGF cDNA into skin wounds through an adenoviral vector suppressed the over-expression of TGFbeta1, which plays an essential role in the progression of dermal fibrogenesis. Application of HGF to the wounds significantly enhanced wound healing and inhibited over scarring.

CONCLUSIONHGF gene therapy could be a new approach for preventing excessive dermal scarring in wound healing.

Animals ; Cicatrix ; prevention & control ; Female ; Gene Transfer Techniques ; Hepatocyte Growth Factor ; pharmacology ; Rabbits ; Random Allocation ; Wound Healing ; drug effects ; physiology