[A survey of levels of antibodies against influenza viruses in the population of Wuxi City].

Objective: To investigate levels of antibodies against type A and type C influenza viruses and those against the 2009 H1N1 influenza A virus (before and after the 2009 H1N1 pandemic) among residents in Wuxi. To compare levels of antibodies against the 2009 H1N1 influenza virus (one year after the pandemic) in the unvaccinated population with those in the population who received vaccine.

Methods: Serum samples were collected from subjects (aged 1-60 years) during September 2008 to May 2009, and during September 2010 to January 2011.

[Etiology monitoring of influenza virus and variation in hemagglutinin genes of H13 subtype in Wuxi area].

Objective: To monitor the seasonal distribution of influenza types and subtypes in Wuxi area during 2005-2008, and to investigate the variation in hemagglutinin (HA) genes of A/H3N2 strains in 2008.

Methods: Nose-throat swab specimens were collected in Wuxi area from flu-like patients from outpatient departments of hospitals as well as from clustering flu-like outbreak patients from workspace, followed by MDCK cell inoculation. Types and subtypes of positive influenza isolates were identified using standard antiserum.

[Genomic analysis of an unknown pap genotype from uropathogenic Escherichia coli 4030 strain].

Objective: To investigate the differences between the sequences of papA and papG of UPEC4030 strain and the related genes, to better understand the genetic variation of UPEC4030 papA and its combination forms with papG so as to identify if it was a new genotype.

Methods: Cloning and sequencing methods were used to analyze the sequences of papG and papA of UPEC4030 strain and to compare their related sequences.

Results: Through sequence analysis of papA, it was revealed that there was a 722 bp gene, encoding 192 amino acid polypeptide.