Microbiological and Clinical Characteristics of Isolates of K57 Capsular Serotype in China.

K57 (K57-KP) is associated with hypervirulence, but the basis and systematic data of K57-KP are limited. A retrospective study was conducted in 156 patients between January 2013 and January 2016. The clinical and molecular data, including antimicrobial susceptibility testing, multilocus sequence typing, antimicrobial resistance genes, and virulence determinants were assessed.

Regulation of gene expression of , a core gene of the type VI secretion system in causing respiratory tract infection.

The objective of the current study was to investigate whether plays a role in the process of infection and to examine clinically relevant factors that may affect expression. Seventy-seven isolates from patients with a respiratory infection at the Second Affiliated Hospital and Yuying Childrens Hospital of Wenzhou Medical University (Wenzhou, China) were included in this study. PCR was performed to screen for the presence of Quantitative real time polymerase chain reaction (qRT-PCR) was carried out to examine the expression of .