Sichuan Da Xue Xue Bao Yi Xue Ban
March 2020
This study is aimed to explore the value of metagenomic next-generation sequencing (mNGS) in diagnosing pathogen in fever patients. It is often a challenge to identify the pathogen that caused the infection in the HIV patients with fever. How could the mNGS be helpful for pathogen diagnosis is unclear.
View Article and Find Full Text PDFSichuan Da Xue Xue Bao Yi Xue Ban
May 2019
Objective: To detect pathogens in a critically ill patient using metagenomic sequencing.
Methods: A critically ill patient with severe acute pancreatitis suffered from abdominal pain and progressed into unconsciousness. Tissue smear, culture, automated biochemical identification and antibiotic susceptibility test, viral load determination by real-time fluorescence quantitative PCR, and immunohistochemical pathological tests were performed to detect pathogens, in addition to metagenomic sequencing based on the BGISEQ-100 high throughput sequencing platform.
Sichuan Da Xue Xue Bao Yi Xue Ban
January 2019
Background: IS26-flanked transposons played an increasingly important part in the mobilization and development of resistance determinants. Heterogeneous resistance-encoding plasmid clusters with polymorphic MDR regions (MRRs) conferred by IS26 in an individual Escherichia coli isolate have not yet been detected.
Objectives: To characterize the complete sequence of a novel blaCTX-M-65- and fosA3-carrying IncZ-7 plasmid with dynamic MRRs from an E.
Eight rmtB-carrying avian Escherichia coli strains from a farm in China were characterised in our previous study, but little is known about the backbones and entire multiresistance regions (MRRs) of these plasmids. Here, three rmtB-carrying IncI1 ST136 plasmids were analysed by whole-plasmid sequencing and were compared. These plasmids were composed of an 83 470-bp IncI1 backbone carrying genes responsible for plasmid replication, transfer, maintenance and stability functions, as well as a 17 330-bp MRR for pEC006 and pEC007, and a 34 626-bp MRR for pEC008.
View Article and Find Full Text PDFObjectives: To determine the prevalence of sharp instrument injuries in hospital-based healthcare workers (HCWs) in mainland China and the contributing factors.
Design: Cross-sectional study.
Setting: The data were derived from public hospitals.
Objectives: To study morphological feature, biochemical characteristic and antibiotic resistance of strain.
Methods: The clinical strain was isolated from ananus swab samples being screened in ICU. Biochemical characteristic of the strain was completed by fully automatic microbial identification and drug susceptibility analysis system (BioMérieux, Marcy-l'éE toile, France) with the ANC Vitek2.
A 139,622-bp IncI1 ST71 conjugative plasmid pEC012 from an avian Escherichia coli D-ST117 strain was sequenced, which carried five IS26-bracketed resistance modules: IS26-fosA3-orf1-orf2-Δorf3-IS26, IS26-fip-ΔISEcp1-bla CTX-M-65-IS903D-iroN-IS26, IS26-ΔtnpR-bla TEM-1-rmtB-IS26, IS26-oqxAB-IS26, and IS26-floR-aac(3)-IV-IS26. The backbone of pEC012 was similar to that of several other IncI1 ST71 plasmids: pV408, pM105, and pC271, but these plasmids had different arrangements of multidrug resistance region. In addition, the novel ISEc57 element was identified, which is in the IS21 family.
View Article and Find Full Text PDFSichuan Da Xue Xue Bao Yi Xue Ban
July 2013
Objective: To investigate the incidence and clinical features of non-Clostridium difficile (C. difficile) associated nosocomial diarrhea in intensive care unit (ICU) caused by Klebsiella oxytoca and Clostridium perfringens.
Methods: The faeces of 102 patients with non-C.
Sichuan Da Xue Xue Bao Yi Xue Ban
May 2013
Objective: To investigate the clonal relatedness of local bla(OXA-58)-carrying Acinetobacter baumannii clinical isolates.
Methods: Non-duplicated isolates of Acinetobacter baumannii were collected in West China Hospital and verified by recA sequencing. Acquired bla(OXA-58) gene and natural bla(OXA51/66) genes were detected by PCR.
Objective: To investigate the local epidemiology of Klebsiella penumoniae carrying bla(CTX-M-15) in southern China and to characterize the genetic environment of bla(CTX-M-15).
Methods: PCR and DNA sequencing were used to detect and characterize the genetic contexts of bla(CTX-M-15). The clonal relatedness of isolates carrying bla(CTX-M-15) was determined by pulse-field gel electrophoresis.
Background & Objectives: Diagnosis for Mycoplasma pneumoniae usually relies on serological tests. PCR technology has some advantages but also limitations. The optimal selection for these tests still needs discussion.
View Article and Find Full Text PDFSichuan Da Xue Xue Bao Yi Xue Ban
March 2011