title: Characterization of Streptococcus suis serotype 2 blood infections using RT-qPCR to quantify glutamate dehydrogenase copy numbers.
abstract: This study characterized the dynamic distribution of bacteria in the blood of pigs infected with Streptococcus suis serotype 2 using specific primers and a TaqMan probe designed to amplify the highly conserved S. suis serotype 2 glutamate dehydrogenase (GDH) gene sequences. Gene copy numbers were used to determine the concentration of bacteria in the blood of infected pigs over time using established TaqMan real-time quantitative PCR methodologies (RT-qPCR). The results showed that the detection limit of the RT-qPCR was 10 GDH gene copies. The advantages of utilizing this approach are the high levels of specificity, sensitivity and reproducibility. Bacteria were detected in the blood of infected pigs after 24 h post infection and S. suis GDH gene copies in the experimental group were highest (10(4.15)) on day 7 post infection. Data presented in this report demonstrate that the TaqMan RT-qPCR detection method can be used to characterize the dynamic changes occurring during S. suis serotype 2 blood infections in Bama minipigs thereby facilitating research associated with defining pathogenic mechanisms associated with this organism.
authors.affiliation: College of Animal science and Animal medicine, Inner Mongolia Agriculture University, Huhhot 010018, China.
authors.forename: Weijun
authors.initials: W
authors.lastname: Yang
authors.forename: Xuehui
authors.initials: X
authors.lastname: Cai
authors.forename: Yongqing
authors.initials: Y
authors.lastname: Hao
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Liu
authors.forename: Shujie
authors.initials: S
authors.lastname: Wang
authors.forename: Rui
authors.initials: R
authors.lastname: Xing
authors.forename: Jiangping
authors.initials: J
authors.lastname: Gu
authors.forename: Caiying
authors.initials: C
authors.lastname: Li
authors.forename: Xiuwei
authors.initials: X
authors.lastname: Yue
authors.forename: Congli
authors.initials: C
authors.lastname: Yuan
authors.forename: Mingfeng
authors.initials: M
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Cui
authors.forename: Xiuguo
authors.initials: X
authors.lastname: Hua
authors.forename: Zhibiao
authors.initials: Z
authors.lastname: Yang
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001769:Blood / Q000382:microbiology*; D017931:DNA Primers / Q000235:genetics; D018628:Gene Dosage; D005969:Glutamate Dehydrogenase / Q000235:genetics* / Q000378:metabolism; D016133:Polymerase Chain Reaction / Q000379:methods*; D013290:Streptococcal Infections / Q000097:blood / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*; D017011:Streptococcus suis / Q000201:enzymology / Q000235:genetics*; D013552:Swine; D013553:Swine Diseases / Q000097:blood / Q000175:diagnosis / Q000382:microbiology*; D013556:Swine, Miniature
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; D005969:Glutamate Dehydrogenase