title: Differential diagnosis of Brucella abortus by real-time PCR based on a single-nucleotide polymorphisms.
abstract: To diagnose brucellosis effectively, many genus- and species-specific detection methods based on PCR have been developed. With conventional PCR assays, real-time PCR techniques have been developed as rapid diagnostic tools. Among them, real-time PCR using hybridization probe (hybprobe) has been recommended for bacteria with high DNA homology among species, with which it is possible to make an accurate diagnosis by means of an amplification curve and melting peak analysis. A hybprobe for B. abortus was designed from a specific single-nucleotide polymorphism (SNP) on the fbaA gene. This probe only showed specific amplification of B. abortus from approximately the 14th cycle, given a melting peak at 69°C. The sensitivity of real-time PCR was revealed to be 20 fg/µl by 10-fold DNA dilution, and the detection limit was 4 CFU in clinical samples. This real-time PCR showed greater sensitivity than that of conventional PCR and previous real-time PCR based on Taqman probe. Therefore, this new real-time PCR assay could be helpful for differentiating B. abortus infection with rapidity and accuracy.
authors.affiliation: Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-city, Gyeonggi-do, 430-757, Republic of Korea.
authors.forename: Ji-Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: Sung-Il
authors.initials: SI
authors.lastname: Kang
authors.forename: Jin Ju
authors.initials: JJ
authors.lastname: Lee
authors.forename: Kichan
authors.initials: K
authors.lastname: Lee
authors.forename: So-Ra
authors.initials: SR
authors.lastname: Sung
authors.forename: Janchivdorj
authors.initials: J
authors.lastname: Erdenebaataar
authors.forename: Batbaatar
authors.initials: B
authors.lastname: Vanaabaatar
authors.forename: Suk Chan
authors.initials: SC
authors.lastname: Jung
authors.forename: Yong Ho
authors.initials: YH
authors.lastname: Park
authors.forename: Han-Sang
authors.initials: HS
authors.lastname: Yoo
authors.forename: Moon
authors.initials: M
authors.lastname: Her
mesh_terms: D000818:Animals; D002002:Brucella / Q000235:genetics; D002003:Brucella abortus / Q000235:genetics*; D002007:Brucellosis, Bovine / Q000175:diagnosis*; D002417:Cattle; D003937:Diagnosis, Differential; D005798:Genes, Bacterial; D020641:Polymorphism, Single Nucleotide; D060888:Real-Time Polymerase Chain Reaction / Q000379:methods / Q000662:veterinary*; D012680:Sensitivity and Specificity; D013045:Species Specificity