Publications by authors named "Yong-Zhong Ning"

Elizabethkingia meningoseptica, a Gram-negative pathogen once deemed clinically insignificant, tends to cause infections among low-birth-weight infants and immunocompromised patients. Previously, vancomycin was reported to cure several patients with bacteraemia caused by E. meningoseptica.

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The incidence of vancomycin-resistant enterococcus (VRE) in China is increasing, the molecular epidemiology of VRE in China is only partly known. This study was conducted to assess the molecular characterization of resistance, virulence and clonality of 69 vancomycin-resistant Enterococcus faecium (VREfm) and seven vancomycin-resistant Enterococcus faecalis (VREfs) isolates obtained from a Chinese hospital between July 2011 and July 2013. The glycopeptide resistance genes (VanA and VanB) were screened by multiplex PCR.

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Objective: To establish the control charts for early warning of diarrhea based on the syndromic surveillance data from enteric clinic in Beijing.

Methods: The outpatient data from enteric clinic of a Grade Three General hospital in Haidian district, Beijing from April 1 to Oct. 31, 2009 and from May 1 to Nov.

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Objective: To investigate the change and significance of vancomycin minimal inhibitory concentration (MIC) against methicillin-resistant Staphylococcus aureus (MRSA) isolates.

Methods: We analyzed the data of inpatients with lower respiratory tract infection, with positive cultures of MRSA from airway samples, at respiratory ward or respiratory intensive care unit (RICU) between 2000 and 2011. The MIC of vancomycin was determined by the agar dilution method.

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Objective: To investigate serum procalcitonin (PCT) concentrations in premature infants with different gestational ages at different times after birth.

Methods: A total of 217 neonates without infection, including 102 premature infants and 115 full-term infants, were enrolled in this study. The premature infants were further divided by gestational age into three subgroups: 30-32 weeks (n=30), 33-34 weeks (n=35) and 35-36 weeks (n=37).

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Background: Previous studies indicated that the time to positivity (TTP) of blood culture is a parameter correlating with degree of the bacteremia and outcome in patients with bloodstream infections caused by Escherichia coli (E. coli). The objective of this study was to further investigate the diagnostic and prognostic power of using TTP to predict E.

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Objective: To identify the clinical and laboratory parameters correlating with speed of bacterial growth in culture and independent risk factors of in-hospital mortality in patients with Escherichia coli bacteremia.

Methods: This retrospective study was conducted at Beijing University Third Hospital. The medical records and microbiological database of the patients diagnosed as Escherichia coli bacteremia between January 2007 and December 2009 were collected.

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Objective: To understand the spectrum of diseases and epidemiological characteristics of outpatients at Entric Disease Clinic, with a focus on analysis of the distribution of infectious diarrheal diseases in different populations and to explore disease control strategies on Enteric Infectious Diseases for focal groups.

Methods: A census on outpatients at Entric Disease Clinics was conducted in two class Three comprehensive hospitals in Beijing from April 1 to October 31, 2009 based on a descriptive study using diarrhea-syndrome surveillance system set in the two clinics, thus to depict the spectrum of diseases and epidemiological characteristics of outpatients, and analyze the proportion of infectious diarrhea in diarrheal diseases specifically and the rate changes of infectious diarrhea in different months, age groups and occupational groups.

Results: Diseases are varied at the two enteric diseases clinics among the patients and there are mainly 10 kinds of diseases, "non-infectious diarrhea" accounted for the highest percentage (77.

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Objective: To investigate the molecular mechanism of multiple-drug and pan-drug resistance among Acinetobacter species.

Methods: Non-repetitive 90 carbapenem-resistant strains of Acinetobacter species were collected in Beijing, Guangzhou, and Fuzhou 1999-2004. The homology of the isolates was determined by both pulsed field gel electrophoresis and randomly amplified polymorphic DNA typing.

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