Osong Public Health Res Perspect.
2017 Feb;8(1):65-70. 10.24171/j.phrp.2017.8.1.09.
A Novel PCR Assay for Detecting Brucella abortus and Brucella melitensis
- Affiliations
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- 1Department of Brucellosis, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran. s.alamian@rvsri.ac.ir
- 2Department of Biotechnology, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.
- 3Department of Microbiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
- 4Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran.
- 5Department of Microbiology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
- KMID: 2386103
- DOI: http://doi.org/10.24171/j.phrp.2017.8.1.09
Abstract
OBJECTIVES
Brucellosis is a major zoonotic disease that poses a significant public health threat worldwide. The classical bacteriological detection process used to identify Brucella spp. is difficult and time-consuming. This study aimed to develop a novel molecular assay for detecting brucellosis.
METHODS
All complete sequences of chromosome 1 with 2.1-Mbp lengths were compared among all available Brucella sequences. A unique repeat sequence (URS) locus on chromosome 1 could differentiate Brucella abortus from Brucella melitensis. A primer set was designed to flank the unique locus. A total of 136 lymph nodes and blood samples were evaluated and classified by the URS-polymerase chain reaction (PCR) method in 2013-2014.
RESULTS
Biochemical tests and bacteriophage typing as the golden standard indicated that all Brucella spp. isolates were B. melitensis biovar 1 and B. abortus biovar 3. The PCR results were the same as the bacteriological method for detecting Brucella spp. The sensitivity and specificity of the URS-PCR method make it suitable for detecting B. abortus and B. melitensis.
CONCLUSION
Quick detection of B. abortus and B. melitensis can provide the most effective strategies for control of these bacteria. The advantage of this method over other presented methods is that both B. abortus and B. melitensis are detectable in a single test tube. Furthermore, this method covered 100% of all B. melitensis and B. abortus biotypes. The development of this URS-PCR method is the first step toward the development of a novel kit for the molecular identification of B. abortus and B. melitensis.
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