1
|
Ahani Azari A, Amanollahi R, Jafari Jozani R, Trott DJ, Hemmatzadeh F. High-resolution melting curve analysis: a novel method for identification of Mycoplasma species isolated from clinical cases of bovine and porcine respiratory disease. Trop Anim Health Prod 2019; 52:1043-1047. [PMID: 31673887 PMCID: PMC7222993 DOI: 10.1007/s11250-019-02098-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/24/2019] [Accepted: 09/23/2019] [Indexed: 11/22/2022]
Abstract
Mycoplasma species cause wide ranges of infectious diseases in human and animals. The aim of the present study was to evaluate a real-time polymerase chain reaction (RT-PCR) followed by a high-resolution melting curve assay (HRM) for rapid differentiation of Mycoplasma species isolated from clinical cases of bovine and porcine respiratory disease. Lung samples from suspected cases to respiratory infections from cows and pigs were cultured on specific media, and the extracted DNA were tested by conventional polymerase chain reaction (PCR) assays for Mycoplasma. A set of universal primers specific for the 16S ribosomal RNA gene was designed and used for RT-PCR and HRM. The HRM analysis was able to differentiate between five different species of Mycoplasmas, namely, M. hyopneumoniae, M. bovis, M. hyorhinis, M. hyosynoviae and other uncultured Mycoplasma. All results were confirmed based on 16S rRNA gene sequencing. This rapid and reliable assay was as a simple alternative to PCR and sequencing, differentiating bovine and porcine mycoplasmas in species level.
Collapse
Affiliation(s)
- Ania Ahani Azari
- Department of Microbiology, Gorgan branch, Islamic Azad University, Gorgan, Iran.
| | - Reza Amanollahi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | | | - Darren J Trott
- Australian Centre for Antimicrobial Resistance Ecology, The University of Adelaide, Adelaide, South Australia, Australia.,School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, South Australia, Australia
| | - Farhid Hemmatzadeh
- Australian Centre for Antimicrobial Resistance Ecology, The University of Adelaide, Adelaide, South Australia, Australia.,School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, South Australia, Australia
| |
Collapse
|
2
|
Optimization and validation of a real-time polymerase chain reaction protocol for the diagnosis of human brucellosis. Folia Microbiol (Praha) 2019; 65:353-361. [PMID: 31368088 DOI: 10.1007/s12223-019-00731-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 07/10/2019] [Indexed: 01/17/2023]
Abstract
Due to limitations in commercial diagnostic methods, this study aimed to develop a reliable real-time polymerase chain reaction (Rt-PCR) assay for early diagnosis of brucellosis. Optimization of the Rt-PCR method was performed on serum samples spiked by Brucella melitensis with different densities ranging from 101 to 108 colony-forming units (cfu)/mL; each density was prepared in ten samples. The limit of detection was investigated by using Thermo DNA extraction kit with Maxima SYBR Green Rt-PCR and two TaqMan probe-based Rt-PCR protocols performed by QuantiTect and TEMPase multiplex PCR master mixes in two thermal cyclers, which were Rotor-Gene and Bio-Rad. The validation of the optimized protocol was carried on 20 brucellosis-negative samples and 20 samples spiked with B. melitensis by using a combination of Thermo DNA extraction kit with TEMPase PCR master mix. SYBR Green Rt-PCR yielded positive results on all samples having ≥ 104 cfu/mL of B. melitensis in both thermal cyclers. Its limit of detection was 112 DNA copies per reaction. The positivity of both probe-based Rt-PCR protocols was 100% and 80% on the samples having 103 cfu/mL and 102 cfu/mL of B. melitensis, respectively. The limit of detection of probe-based protocols was defined as 4 DNA copies per reaction. The optimized Rt-PCR protocol showed high-level accuracy, precision, specificity, and sensitivity, each having a rate of 100%. The current study indicated that the TaqMan probe-based Rt-PCR protocol optimized and validated with serum samples can be reliably used for early diagnosis of brucellosis.
Collapse
|
3
|
Sun H, Xiao G, Zhang J, Pan Z, Chen Y, Xiong F. Rapid simultaneous detection of bla oxa-23, Ade-B, int-1, and ISCR-1 in multidrug-resistant Acinetobacter baumannii using single-tube multiplex PCR and high resolution melting assay. Infect Drug Resist 2019; 12:1573-1581. [PMID: 31289445 PMCID: PMC6565808 DOI: 10.2147/idr.s207225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 05/13/2019] [Indexed: 11/23/2022] Open
Abstract
Objective: The aim of this study was to develop a multiplex PCR system for the rapid and simultaneous detection of blaoxa-23, Ade-B, int-1, and ISCR-1 genes in multidrug-resistant Acinetobacter baumannii (MDRAB) using high resolution melting (HRM) assay. Methods: Four pairs of primers were designed, and PCR amplification products were sequenced and compared with NCBI GeneBank sequences to ensure primer specificity. Multiplex PCR was performed using a dedicated HRM reagent, and melting curves and temperatures were able to distinguish the four genes. This method was subsequently used to detect these genes in 79 MDRAB isolates from the Third Affiliated Hospital of Southern Medical University in southern China. Results: Using the HRM assay, 73 out of 79 isolates were found to carry both blaoxa-23 and Ade-B, one isolate carried int-1, two isolates carried both int-1 and ISCR-1, and three isolates carried Ade-B, int-1, and ISCR-1. No isolates carried all four genes. Conclusion: Compared with traditional resistance gene detection methods–PCR and agarose gel electrophoresis-based resistance gene detection methods–the multiplex PCR and HRM assay method was simple, rapid, highly efficient, and cost-effective. Our results showed that blaoxa-23 and Ade-B were the main resistance genotypes in MDRAB.
Collapse
Affiliation(s)
- Hengbiao Sun
- Department of Clinical Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, People's Republic of China
| | - Gang Xiao
- Department of Clinical Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, People's Republic of China
| | - Jing Zhang
- Department of Clinical Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, People's Republic of China
| | - Zuhan Pan
- Department of Clinical Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, People's Republic of China
| | - Youming Chen
- Department of Clinical Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, People's Republic of China
| | - Fu Xiong
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| |
Collapse
|
4
|
Abstract
Brucellosis remains the most common bacterial zoonotic infection in many countries worldwide. Despite being long recognized and controllable, the disease still causes substantial morbidity, affecting especially the young population. The aim of this review is to provide insight to the epidemiology, etiology, clinical features, diagnosis, and management of childhood brucellosis.
Collapse
Affiliation(s)
- Elham E Bukhari
- Infectious Disease Section, Department of Pediatrics, College of Medicine, King Saud University Medical City, King Saud University, Riyadh, Kingdom of Saudi Arabia. E-mail.
| |
Collapse
|
5
|
Al-Farha AAB, Petrovski K, Jozani R, Hoare A, Hemmatzadeh F. Discrimination between some Mycoplasma spp. and Acholeplasma laidlawii in bovine milk using high resolution melting curve analysis. BMC Res Notes 2018; 11:107. [PMID: 29415764 PMCID: PMC5804061 DOI: 10.1186/s13104-018-3223-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 02/01/2018] [Indexed: 11/10/2022] Open
Abstract
Objectives This study aimed to provide a rapid, accurate and cost-effective diagnostic real time polymerase chain reaction-high resolution melting curve assay (PCR-HRM) to identify and distinguish between four different mycoplasmas and Acholeplasma laidlawii isolated at cow-level from a single commercial dairy farm in South Australia. One set of genus-level universal primers was designed targeting the 16S ribosomal RNA gene. Results Real time PCR-HRM analysis was able to identify and distinguish between five different mollicutes, namely A. laidlawii, M. arginini, M. bovirhinis, M. bovis and uncultured Mycoplasma. Results were confirmed through sequencing. Our developed assay provides rapid and accurate screening for Mycoplasma mastitis detection.
Collapse
Affiliation(s)
- Abd Al-Bar Al-Farha
- School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, South Australia, 5371, Australia. .,Mosul Technical Institute, Technical Foundation, Northern Technical University, Mosul, 41000, Iraq.
| | - Kiro Petrovski
- School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, South Australia, 5371, Australia.,Australian Centre for Antimicrobial Resistance Ecology, The University of Adelaide, Adelaide, South Australia, 5000, Australia.,Davies Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, 5371, Australia
| | - Razi Jozani
- Department of Veterinary Clinical Sciences, University of Tabriz, Tabriz, 51666-14766, Iran
| | - Andrew Hoare
- South East Vets, Mt Gambier, South Australia, 5290, Australia
| | - Farhid Hemmatzadeh
- School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, South Australia, 5371, Australia.,Australian Centre for Antimicrobial Resistance Ecology, The University of Adelaide, Adelaide, South Australia, 5000, Australia
| |
Collapse
|
6
|
Rao D, Wu M, Wang J, Yuan W, Zhu Y, Cong F, Xu F, Lian Y, Huang B, Wu Q, Chen M, Zhang Y, Huang R, Guo P. Differentiation of minute virus of mice and mouse parvovirus by high resolution melting curve analysis. J Virol Methods 2017; 250:41-46. [PMID: 28947147 DOI: 10.1016/j.jviromet.2017.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 09/21/2017] [Accepted: 09/21/2017] [Indexed: 11/30/2022]
Abstract
Murine parvovirus is one of the most prevalent infectious pathogens in mouse colonies. A specific primer pair targeting the VP2 gene of minute virus of mice (MVM) and mouse parvovirus (MPV) was utilized for high resolution melting (HRM) analysis. The resulting melting curves could distinguish these two virus strains and there was no detectable amplification of the other mouse pathogens which included rat parvovirus (KRV), ectromelia virus (ECT), mouse adenovirus (MAD), mouse cytomegalovirus (MCMV), polyoma virus (Poly), Helicobactor hepaticus (H. hepaticus) and Salmonella typhimurium (S. typhimurium). The detection limit of the standard was 10 copies/μL. This study showed that the PCR-HRM assay could be an alternative useful method with high specificity and sensitivity for differentiating murine parvovirus strains MVM and MPV.
Collapse
Affiliation(s)
- Dan Rao
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Miaoli Wu
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Jing Wang
- Guangdong Laboratory Animals Monitoring Institute, Guangzhou 510633, China
| | - Wen Yuan
- Guangdong Laboratory Animals Monitoring Institute, Guangzhou 510633, China
| | - Yujun Zhu
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Feng Cong
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Fengjiao Xu
- Guangdong Laboratory Animals Monitoring Institute, Guangzhou 510633, China
| | - Yuexiao Lian
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Bihong Huang
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Qiwen Wu
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China; South China Agricultural University, Guangzhou 510642, China
| | - Meili Chen
- Guangdong Laboratory Animals Monitoring Institute, Guangzhou 510633, China
| | - Yu Zhang
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China
| | - Ren Huang
- Guangdong Laboratory Animals Monitoring Institute, Guangzhou 510633, China.
| | - Pengju Guo
- Guangdong Key Laboratory of Laboratory Animals, Guangzhou 510633, China.
| |
Collapse
|
7
|
Mustafa AS, Habibi N, Osman A, Shaheed F, Khan MW. Species identification and molecular typing of human Brucella isolates from Kuwait. PLoS One 2017; 12:e0182111. [PMID: 28800594 PMCID: PMC5553756 DOI: 10.1371/journal.pone.0182111] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 07/12/2017] [Indexed: 11/19/2022] Open
Abstract
Brucellosis is a zoonotic disease of major concern in Kuwait and the Middle East. Human brucellosis can be caused by several Brucella species with varying degree of pathogenesis, and relapses are common after apparently successful therapy. The classical biochemical methods for identification of Brucella are time-consuming, cumbersome, and provide information limited to the species level only. In contrast, molecular methods are rapid and provide differentiation at intra-species level. In this study, four molecular methods [16S rRNA gene sequencing, real-time PCR, enterobacterial repetitive intergenic consensus (ERIC)-PCR and multilocus variable-number tandem-repeat analysis (MLVA)-8, MLVA-11 and MLVA-16 were evaluated for the identification and typing of 75 strains of Brucella isolated in Kuwait. 16S rRNA gene sequencing of all isolates showed 90-99% sequence identity with B. melitensis and real-time PCR with genus- and species- specific primers identified all isolates as B. melitensis. The results of ERIC-PCR suggested the existence of 75 ERIC genotypes of B. melitensis with a discriminatory index of 0.997. Cluster classification of these genotypes divided them into two clusters, A and B, diverging at ~25%. The maximum number of genotypes (n = 51) were found in cluster B5. MLVA-8 analysis identified all isolates as B. melitensis, and MLVA-8, MLVA-11 and MLVA-16 typing divided the isolates into 10, 32 and 71 MLVA types, respectively. Furthermore, the combined minimum spanning tree analysis demonstrated that, compared to MLVA types discovered all over the world, the Kuwaiti isolates were a distinct group of MLVA-11 and MLVA-16 types in the East Mediterranean Region.
Collapse
Affiliation(s)
- Abu S. Mustafa
- OMICS Research Unit and Research Core Facility, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
- Department of Microbiology, Faculty of Medicine, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
- * E-mail:
| | - Nazima Habibi
- OMICS Research Unit and Research Core Facility, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
| | - Amr Osman
- OMICS Research Unit and Research Core Facility, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
| | - Faraz Shaheed
- OMICS Research Unit and Research Core Facility, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
| | - Mohd W. Khan
- OMICS Research Unit and Research Core Facility, Heath Sciences Centre, Kuwait University, Jabriya, Kuwait
| |
Collapse
|
8
|
Zamri-Saad M, Kamarudin MI. Control of animal brucellosis: The Malaysian experience. ASIAN PAC J TROP MED 2016; 9:1136-1140. [PMID: 27955740 DOI: 10.1016/j.apjtm.2016.11.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 09/05/2016] [Accepted: 09/14/2016] [Indexed: 11/15/2022] Open
Abstract
Brucellosis is a zoonotic disease characterized by reproductive failure in animals and undulent fever in humans. In cattle, it is caused by Brucella abortus while in goats by Brucella melitensis, the main cause of brucellosis in humans. Brucellosis in livestock has been associated with importation of animals from breeder herd of unknown disease status. The prevalence of bovine brucellosis Brucella abortus in 2014 ranged between 1% and 2% in Thailand and Indonesia, and 4%-5% in Malaysia and Myanmar. Prevalence of goat brucellosis Brucella melitensis is approximately 1% in Malaysia and Thailand. 'Test-and-slaughter' is the general policy against brucellosis adopted by most ASEAN countries to eradicate the disease. Under this program, the Rose Bengal Plate Test (RBPT) is used as the screening test to identify infected farm/herd while the complement fixation test (CFT) is the confirmatory test. The test-and-slaughter eradication strategy that was implemented since 1979 had managed to keep the prevalence rate to less than 5%, from 3.3% in 1979, 0.23% in 1988, 1% in 1998 and 5% in 2016. The test-and-slaughter program seemed effective in reducing the prevalence of brucellosis but was unable to eradicate the disease due to several factors, which include failure to locate and identify the remaining affected animals and to control their movement, importation of breeder animals from non-brucellosis free countries and lack of participation by the farmers following unreliable test results. To support the eradication policy, research activities since 1980s have suggested combinations of serological tests to improve diagnosis while surveillance should be focused on hotspots areas. The prevalence can be further reduced by strictly sourcing breeder animals from brucella-free areas or countries.
Collapse
Affiliation(s)
- M Zamri-Saad
- Research Centre for Ruminant Diseases, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
| | - M I Kamarudin
- Department of Veterinary Services Malaysia, Ministry of Agriculture and Agro-based Industry, 62250 Putrajaya, Malaysia
| |
Collapse
|
9
|
Alfouzan W, Al-Sahali S, Sultan H, Dhar R. Classical Presentation of Acute Pyelonephritis in a Case of Brucellosis. Case Rep Nephrol Dial 2016; 6:83-88. [PMID: 28101501 PMCID: PMC5216229 DOI: 10.1159/000446393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 04/23/2016] [Indexed: 01/07/2023] Open
Abstract
Although Brucella species is known to affect almost all organs in humans, renal involvement presenting as acute pyelonephritis remains a rare entity in brucellosis. We report the case of a female patient who presented with symptoms of fever with chills, right loin pain and dysuria in the emergency room. Blood cultures drawn at the time of admission grew Brucella spp., but no organisms were isolated from urine culture although urinalysis data was indicative of urinary tract infection. Empiric therapy with piperacillin/tazobactam plus gentamicin relieved her symptoms. However, the treatment was switched to doxycycline plus rifampicin once the blood culture result was obtained.
Collapse
Affiliation(s)
- Wadha Alfouzan
- Microbiology Unit, Department of Laboratories, Al-Farwania Hospital, Kuwait City, Kuwait; Department of Microbiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Sara Al-Sahali
- Microbiology Unit, Department of Laboratories, Al-Farwania Hospital, Kuwait City, Kuwait
| | - Hawra'a Sultan
- Department of Medicine, Al-Farwania Hospital, Kuwait City, Kuwait
| | - Rita Dhar
- Microbiology Unit, Department of Laboratories, Al-Farwania Hospital, Kuwait City, Kuwait
| |
Collapse
|
10
|
Khazaei Z, Najafi A, Piranfar V, Mirnejad R. Microarray-based long oligonucleotides probe designed for Brucella Spp. detection and identification of antibiotic susceptibility pattern. Electron Physician 2016; 8:2297-303. [PMID: 27280008 PMCID: PMC4886574 DOI: 10.19082/2296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 03/30/2016] [Indexed: 12/05/2022] Open
Abstract
Brucella spp. is a common zoonotic infection referred to as Brucellosis, and it is a serious public health problem around the world. There are currently six classical species (pathogenic species in both animals and humans) within the genus Brucella. The ability and practicality facilitated by a microarray experiment help us to recognize Brucella spp. and its antibiotic resistant gene. Rapid phenotypic determination of antibiotic resistance is not possible by disk diffusion methods. Thus, evaluating antibiotics pattern and Brucella detection appear necessary technique by molecular methods in brucellosis. So, the aim of this study was to design a microarray long oligonucleotides probe and primer for the complete diagnosis of Brucella spp. and obtaining genetic profiles for antibiotic resistance in bacteria at the same time. In this study, we designed 16 antibiotic-resistant gene solid-phase primers with similar melting temperatures of 60 °C and 16 long oligonucleotide probes. These primers and probes can identify tetracycline-, chloramphenicol-, and aminoglycoside-resistant genes, respectively. The design of microarray probes is a versatile process that be done in a wide range of selections. Since the long oligo microarray probes are the best choices for specific diagnosis and definite treatment, this group of probes was designed in the present survey.
Collapse
Affiliation(s)
- Zahra Khazaei
- M.Sc. of Biotechnology, Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ali Najafi
- Ph.D. of Bioinformatic, Assistance Professor, Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Vahhab Piranfar
- M.Sc. of Microbiology, Department of Biology, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran
| | - Reza Mirnejad
- Ph.D. of Medical Bacteriology, Associate Professor, Molecular Biology Research Centre, Baqiyatallah University of Medical Sciences Tehran. Iran
| |
Collapse
|
11
|
Miller M, Zorn J, Brielmeier M. High-Resolution Melting Curve Analysis for Identification of Pasteurellaceae Species in Experimental Animal Facilities. PLoS One 2015; 10:e0142560. [PMID: 26556281 PMCID: PMC4640598 DOI: 10.1371/journal.pone.0142560] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/25/2015] [Indexed: 11/19/2022] Open
Abstract
Pasteurellaceae are among the most prevalent bacterial pathogens isolated from mice housed in experimental animal facilities. Reliable detection and differentiation of Pasteurellaceae are essential for high-quality health monitoring. In this study, we combined a real-time PCR assay amplifying a variable region in the 16S rRNA sequence with high-resolution melting curve analysis (HRM) to identify and differentiate among the commonly isolated species Pasteurella pneumotropica biotypes “Jawetz” and “Heyl”, Actinobacillus muris, and Haemophilus influenzaemurium. We used a set of six reference strains for assay development, with the melting profiles of these strains clearly distinguishable due to DNA sequence variations in the amplicon. For evaluation, we used real-time PCR/HRM to test 25 unknown Pasteurellaceae isolates obtained from an external diagnostic laboratory and found the results to be consistent with those of partial 16S rRNA sequencing. The real-time PCR/HRM method provides a sensitive, rapid, and closed-tube approach for Pasteurellaceae species identification for health monitoring of laboratory mice.
Collapse
Affiliation(s)
- Manuel Miller
- Research Unit Comparative Medicine, German Research Center for Environmental Health, Neuherberg, Germany
- * E-mail:
| | - Julia Zorn
- Research Unit Comparative Medicine, German Research Center for Environmental Health, Neuherberg, Germany
| | - Markus Brielmeier
- Research Unit Comparative Medicine, German Research Center for Environmental Health, Neuherberg, Germany
| |
Collapse
|