Search

Your search keyword '"Shouyi Yu"' showing total 2 results
Start Over Author "Shouyi Yu" Publisher mary ann liebert, inc.
2 results on '"Shouyi Yu"'

1. A Humoral Immunity Survey Following the 2012 Influenza Season After the pH1N1 Pandemic in Guangzhou, China

Author

Yonghui Zhang, Chun-Quan Ou, Dong-Lin Cao, Chang-Wen Ke, Zhong-Zhou Huang, Wen-Ze Su, Shouyi Yu, Ling Fang, Xin Zhang, Li-Jun Liang, and Ping Huang

Subjects
Adult, Male, Hemagglutination Inhibition Tests, China, Adolescent, viruses, Immunology, medicine.disease_cause, Antibodies, Viral, Virus, Young Adult, Influenza A Virus, H1N1 Subtype, Seroepidemiologic Studies, Virology, Original Research Articles, Pandemic, Influenza, Human, Influenza A virus, medicine, Seroprevalence, Humans, Child, Aged, Aged, 80 and over, Hemagglutination assay, business.industry, Influenza A Virus, H3N2 Subtype, Antibody titer, Infant, Newborn, virus diseases, Infant, Middle Aged, Vaccination, Influenza B virus, Cross-Sectional Studies, Child, Preschool, Molecular Medicine, Female, business
Abstract

According to pathogenic surveillance data during the first half of 2012, the H3N2 influenza virus was prevalent in Guangdong, China, but no pandemic H1N1 (pH1N1) virus was detected. This study aimed to measure the seroprevalence of pH1N1 and H3N2 infection following the influenza epidemic in 2012. We collected serum samples by stratified random sampling in a cross-sectional survey from August, 2012 to October, 2012. Antibody titers against H3N2, pH1N1, and influenza B antigens were measured by the hemagglutination inhibition (HI) assay, and age-specific seroprevalence and non-immunity were calculated. A total of 566 serum samples were collected from subjects who had not received an influenza vaccination. The seroprevalence of H3N2, pH1N1, and influenza B were 61.7%, 31.3%, and 40.4%, respectively, while non-immunity was calculated to be 9.2%, 40.6%, and 27.0%, respectively. The highest recorded seroprevalence was 86.0% for H3N2 in the 6-15 year age group, while the lowest was 14.6% for pH1N1 in the 60+ age group. Non-immunity fractions were 44.4% and 53.5% in the 0-6 and 60+ age groups, respectively. In conclusion, the seroprevalence of pH1N1 remained below 50% in all age groups following the 2012 influenza season. These data suggest that vaccination against pH1N1 antigens should be conducted, especially in the older age groups, before the next influenza season.

Published
2014

2. Class 1 Integrons in Urinary Isolates of Extended-Spectrum β-Lactamase-Producing Escherichia coli and Klebsiella pneumoniae in Southern China During the Past Five Years.

Author

Jingjing Sun, Fen Zheng, Fengping Wang, Kuihai Wu, Qian Wang, Qing Chen, Shouyi Yu, and Yongyu Rui

Subjects
*INTEGRONS, *BETA lactamases, *BACTERIAL genetics, *ESCHERICHIA coli, *ISOLATION of biotechnological microorganisms, *KLEBSIELLA pneumoniae, *ESCHERICHIA coli enzymes, *URINALYSIS
Abstract

We analyzed extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (226) and Klebsiella pneumoniae (53) collected from urine specimens during 2005-2009 for the presence of ESBL genes, class 1 integrons, and characterization of gene cassettes. TEM and CTX-M β-lactamase genes were the most prevalent. One hundred and forty-four E. coli and 35 K. pneumoniae were positive for the class 1 integrase gene; among them, 99 E. coli and 14 K. pneumoniae detected gene cassettes. Gene cassette regions were identified by restriction fragment length polymorphism and DNA sequencing analysis. Eleven distinct gene cassette arrays were found in E. coli isolates, and seven distinct gene cassette arrays were found in K. pneumoniae isolates. The cassette array aacA4-catB8- aadA1 was first found in E. coli and dfrA1-orfC was first reported in K. pneumoniae. Most of the gene cassettes found in this class 1 integrons were for aminoglycoside resistance. Enterobacterial repetitive intergenic consensus- polymerase chain reaction fingerprint patterns revealed the isolates carrying gene cassettes were genetically unrelated. In conclusion, we studied the class 1 integrons among urinary isolates of ESBL-producing E. coli and K. pneumoniae in Southern China during the past 5 years and found that class 1 integrons were widely disseminated and played a major role in antibiotic resistance. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results