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Miyakoshi A, Niimi H, Ueno T, Wakasugi M, Higashi Y, Miyajima Y, Mori M, Tabata H, Minami H, Takaoka A, Hayashi A, Yamamoto Y, Kitajima I. Novel rapid method for identifying and quantifying pathogenic bacteria within four hours of blood collection. Sci Rep 2024; 14:1199. [PMID: 38216600 PMCID: PMC10786899 DOI: 10.1038/s41598-023-50864-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 12/27/2023] [Indexed: 01/14/2024] Open
Abstract
Sepsis is life-threatening organ dysfunction and is considered a major cause of health loss. However, since the current biomarkers of sepsis reflect the host's immune response to microorganisms, they would inevitably cause a time-lag. This means that there is still no truly reliable biomarker of sepsis. In the present study, we developed a novel method for identifying and quantifying unknown pathogenic bacteria within four hours of sample collection. The most important point of this study is that the novel method can be used to determine the number of bacteria in a sample as a novel biomarker of infectious diseases. Indeed, based on the number of bacteria, we were able to accurately estimate the severity of microbial infection. Furthermore, using the time-dependent changes in the number of bacteria, we were able to monitor the therapeutic effect accurately. The rapid identification and quantification of bacteria may change our approach to medical care.
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Affiliation(s)
- Akio Miyakoshi
- Department of Ophthalmology, Toyama University Hospital, Toyama, Japan
| | - Hideki Niimi
- Clinical Laboratory Center, Toyama University Hospital, 2630 Sugitani, Toyama, 930-0194, Japan.
| | - Tomohiro Ueno
- Clinical Laboratory Center, Toyama University Hospital, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Masahiro Wakasugi
- Disaster and Emergency Center, Toyama University Hospital, Toyama, Japan
| | - Yoshitsugu Higashi
- Department of Clinical Infectious Diseases, Toyama University Hospital, Toyama, Japan
| | - Yuki Miyajima
- Department of Clinical Infectious Diseases, Toyama University Hospital, Toyama, Japan
| | - Masashi Mori
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi, Japan
| | - Homare Tabata
- Life Science Center, Hokkaido Mitsui Chemicals, Inc., Sunagawa, Japan
| | - Hiroshi Minami
- Life Science Center, Hokkaido Mitsui Chemicals, Inc., Sunagawa, Japan
| | - Akinori Takaoka
- Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Atsushi Hayashi
- Department of Ophthalmology, Toyama University Hospital, Toyama, Japan
| | - Yoshihiro Yamamoto
- Department of Clinical Infectious Diseases, Toyama University Hospital, Toyama, Japan
| | - Isao Kitajima
- Administrative Office, University of Toyama, Toyama, Japan
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Ma C, Li M, Peng H, Lan M, Tao L, Li C, Wu C, Bai H, Zhong Y, Zhong S, Qin R, Li F, Li J, He J. Mesomycoplasma ovipneumoniae from goats with respiratory infection: pathogenic characteristics, population structure, and genomic features. BMC Microbiol 2023; 23:220. [PMID: 37580659 PMCID: PMC10424369 DOI: 10.1186/s12866-023-02964-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 07/27/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND Mycoplasma ovipneumoniae is a critical pathogen that causes respiratory diseases that threaten Caprini health and cause economic damage. A genome-wide study of M. ovipneumoniae will help understand the pathogenic characteristics of this microorganism. RESULTS Toxicological pathology and whole-genome sequencing of nine M. ovipneumoniae strains isolated from goats were performed using an epidemiological survey. These strains exhibited anterior ventral lung consolidation, typical of bronchopneumonia in goats. Average nucleotide identity and phylogenetic analysis based on whole-genome sequences showed that all M. ovipneumoniae strains clustered into two clades, largely in accordance with their geographical origins. The pan-genome of the 23 M. ovipneumoniae strains contained 5,596 genes, including 385 core, 210 soft core, and 5,001 accessory genes. Among these genes, two protein-coding genes were annotated as cilium adhesion and eight as paralog surface adhesins when annotated to VFDB, and no antibiotic resistance-related genes were predicted. Additionally, 23 strains carried glucosidase-related genes (ycjT and group_1595) and glucosidase-related genes (atpD_2), indicating that M. ovipneumoniae possesses a wide range of glycoside hydrolase activities. CONCLUSIONS The population structure and genomic features identified in this study will facilitate further investigations into the pathogenesis of M. ovipneumoniae and lay the foundation for the development of preventive and therapeutic methods.
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Affiliation(s)
- Chunxia Ma
- College of Animal Science and Technology, Guangxi University, Nanning, 530004, Guangxi, China
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Ming Li
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Institute of Fisheries, Nanning, 530021, Guangxi, China
| | - Hao Peng
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Meiyi Lan
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Li Tao
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Changting Li
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Cuilan Wu
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Huili Bai
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Yawen Zhong
- College of Animal Science and Technology, Guangxi University, Nanning, 530004, Guangxi, China
| | - Shuhong Zhong
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Ruofu Qin
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Fengsheng Li
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China
| | - Jun Li
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, Guangxi, China.
- Key Laboratory of China (Guangxi)-ASEAN Cross-Border Animal Disease Prevention and Control, Nanning, 530001, Guangxi, China.
| | - Jiakang He
- College of Animal Science and Technology, Guangxi University, Nanning, 530004, Guangxi, China.
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Mycoplasma ovipneumoniae: A Most Variable Pathogen. Pathogens 2022; 11:pathogens11121477. [PMID: 36558811 PMCID: PMC9781387 DOI: 10.3390/pathogens11121477] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 11/28/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
Mycoplasma ovipneumoniae, a well-established respiratory pathogen of sheep and goats, has gained increased importance recently because of its detection in wild ruminants including members of the Cervidae family. Despite its frequent isolation from apparently healthy animals, it is responsible for outbreaks of severe respiratory disease which are often linked to infections with multiple heterologous strains. Furthermore, M. ovipneumoniae is characterized by an unusually wide host range, a high degree of phenotypic, biochemical, and genomic heterogeneity, and variable and limited growth in mycoplasma media. A number of mechanisms have been proposed for its pathogenicity, including the production of hydrogen peroxide, reactive oxygen species production, and toxins. It shows wide metabolic activity in vitro, being able to utilize substrates such as glucose, pyruvate, and isopropanol; these patterns can be used to differentiate strains. Treatment of infections in the field is complicated by large variations in the susceptibility of strains to antimicrobials, with many showing high minimum inhibitory concentrations. The lack of commercially available vaccines is probably due to the high cost of developing vaccines for diseases in small ruminants not presently seen as high priority. Multiple strains found in affected sheep and goats may also hamper the development of effective vaccines. This review summarizes the current knowledge and identifies gaps in research on M. ovipneumoniae, including its epidemiology in sheep and goats, pathology and clinical presentation, infection in wild ruminants, virulence factors, metabolism, comparative genomics, genotypic variability, phenotypic variability, evolutionary mechanisms, isolation and culture, detection and identification, antimicrobial susceptibility, variations in antimicrobial susceptibility profiles, vaccines, and control.
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Robinson E, Schulein C, Jacobson BT, Jones K, Sago J, Huber V, Jutila M, Bimczok D, Rynda-Apple A. Pathophysiology of Influenza D Virus Infection in Specific-Pathogen-Free Lambs with or without Prior Mycoplasma ovipneumoniae Exposure. Viruses 2022; 14:1422. [PMID: 35891403 PMCID: PMC9321583 DOI: 10.3390/v14071422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 12/04/2022] Open
Abstract
Polymicrobial pneumonias occur frequently in cattle, swine, and sheep, resulting in major economic losses. Individual pathogens comprising these complex infections may be mild on their own but can instead exhibit synergism or increase host susceptibility. Two examples of such pathogens, Mycoplasma ovipneumoniae (M. ovipneumoniae) and influenza D viruses (IDVs), naturally infect domestic sheep. In sheep, the role of M. ovipneumoniae in chronic nonprogressive pneumonia is well-established, but the pathogenesis of IDV infection has not previously been studied. We utilized a specific-pathogen-free sheep flock to study the clinical response to IDV infection in naïve vs. M. ovipneumoniae-exposed lambs. Lambs were inoculated intranasally with M. ovipneumoniae or mock infection, followed after four weeks by infection with IDV. Pathogen shedding was tracked, and immunological responses were evaluated by measuring acute phase response and IDV-neutralizing antibody titers. While lamb health statuses remained subclinical, M. ovipneumoniae-exposed lambs had significantly elevated body temperatures during IDV infection compared to M. ovipneumoniae-naïve, IDV-infected lambs. Moreover, we found a positive correlation between prior M. ovipneumoniae burden, early-infection IDV shedding, and IDV-neutralizing antibody response. Our findings suggest that IDV infection may not induce clinical symptoms in domestic sheep, but previous M. ovipneumoniae exposure may promote mild IDV-associated inflammation.
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Affiliation(s)
- Ema Robinson
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - Clyde Schulein
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - B. Tegner Jacobson
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - Kerri Jones
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - Jonathon Sago
- Montana State Veterinary Diagnostic Laboratory, 1911 West Lincoln Street, Bozeman, MT 59718, USA;
| | - Victor Huber
- Division of Basic Biomedical Sciences, Sanford School of Medicine, University of South Dakota, Vermillion, SD 57069, USA;
| | - Mark Jutila
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - Diane Bimczok
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
| | - Agnieszka Rynda-Apple
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA; (E.R.); (C.S.); (B.T.J.); (K.J.); (M.J.); (D.B.)
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Johnson T, Jones K, Jacobson BT, Schearer J, Adams N, Thornton I, Mosdal C, Jones S, Jutila M, Rynda-Apple A, Besser T, Bimczok D. Experimental infection of specific-pathogen-free domestic lambs with Mycoplasma ovipneumoniae causes asymptomatic colonization of the upper airways that is resistant to antibiotic treatment. Vet Microbiol 2022; 265:109334. [PMID: 35033769 PMCID: PMC9109813 DOI: 10.1016/j.vetmic.2022.109334] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 12/30/2021] [Accepted: 01/08/2022] [Indexed: 02/03/2023]
Abstract
Mycoplasma ovipneumoniae (M. ovipneumoniae) is a respiratory pathogen associated with mild to moderate respiratory disease in domestic lambs and severe pneumonia outbreaks in wild ruminants such as bighorn sheep. However, whether M. ovipneumoniae by itself causes clinical respiratory disease in domestic sheep in the absence of secondary bacterial pathogens is still unclear. The goal of our study was to better understand the role of M. ovipneumoniae as a respiratory pathogen in domestic sheep and to explore potential antibiotic treatment approaches. Therefore, we inoculated four 4-month-old, specific-pathogen-free lambs with fresh nasal wash fluids from M. ovipneumoniae-infected sheep. The lambs were monitored for M. ovipneumoniae colonization, M. ovipneumoniae-specific antibodies, clinical signs, and cellular and molecular correlates of lung inflammation for eight weeks. All lambs then were treated with gamithromycin and observed for an additional four weeks. M. ovipneumoniae inoculation resulted in stable colonization of the upper respiratory tract in all M. ovipneumoniae-inoculated, but in none of the four mock-infected control lambs. All M. ovipneumoniae-infected lambs developed a robust antibody response to M. ovipneumoniae within 2 weeks. However, we did not observe significant signs of respiratory disease, evidence of lung damage or inflammation in any of the infected lambs. Interestingly, treatment with gamithromycin, which blocked growth of the M. ovipneumoniae in vitro, failed to reduce M. ovipneumoniae colonization. These observations indicate that, in the absence of co-infections, M. ovipneumoniae caused asymptomatic colonization of the upper respiratory tract that was resistant to clearance by the host immune response and by gamithromycin treatment.
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Affiliation(s)
- Thea Johnson
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Kerri Jones
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - B Tegner Jacobson
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Julia Schearer
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Noah Adams
- Chemical and Biological Engineering Department, Montana State University, USA
| | - Isaak Thornton
- Department of Mechanical and Industrial Engineering, Montana State University, USA
| | - Cassie Mosdal
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Steven Jones
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Mark Jutila
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Agnieszka Rynda-Apple
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA
| | - Thomas Besser
- Department of Veterinary Microbiology and Pathology, Washington State University, PO Box 647040, Pullman, WA 99164-7040, USA
| | - Diane Bimczok
- Department of Microbiology and Cell Biology, Montana State University, 2155 Analysis Drive, Bozeman, MT 59718, USA.
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Gupta SK, Deng Q, Gupta TB, Maclean P, Jores J, Heiser A, Wedlock DN. Recombinase polymerase amplification assay combined with a dipstick-readout for rapid detection of Mycoplasma ovipneumoniae infections. PLoS One 2021; 16:e0246573. [PMID: 33539437 PMCID: PMC7861559 DOI: 10.1371/journal.pone.0246573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 01/21/2021] [Indexed: 11/25/2022] Open
Abstract
Mycoplasma ovipneumoniae infects both sheep and goats causing pneumonia resulting in considerable economic losses worldwide. Current diagnosis methods such as bacteriological culture, serology, and PCR are time consuming and require sophisticated laboratory setups. Here we report the development of two rapid, specific and sensitive assays; an isothermal DNA amplification using recombinase polymerase amplification (RPA) and a real-time PCR for the detection of M. ovipneumoniae. The target for both assays is a specific region of gene WP_069098309.1, which encodes a hypothetical protein and is conserved in the genome sequences of ten publicly available M. ovipneumoniae strains. The RPA assay performed well at 39°C for 20 min and was combined with a lateral flow dipstick (RPA-LFD) for easy visualization of the amplicons. The detection limit of the RPA-LFD assay was nine genome copies of M. ovipneumoniae per reaction and was comparable to sensitivity of the real-time PCR assay. Both assays showed no cross-reaction with 38 other ovine and caprine pathogenic microorganisms and two parasites of ruminants, demonstrating a high degree of specificity. The assays were validated using bronchoalveolar lavage fluid and nasal swab samples collected from sheep. The positive rate of RPA-LFD (97.4%) was higher than the real-time PCR (95.8%) with DNA as a template purified from the clinical samples. The RPA assay was significantly better at detecting M. ovipneumoniae in clinical samples compared to the real-time PCR when DNA extraction was omitted (50% and 34.4% positive rate for RPA-LFD and real-time PCR respectively). The RPA-LFD developed here allows easy and rapid detection of M. ovipneumoniae infection without DNA extraction, suggesting its potential as a point-of-care test for field settings.
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Affiliation(s)
- Sandeep K. Gupta
- Animal Health, AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
- * E-mail:
| | - Qing Deng
- Animal Health, AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Tanushree B. Gupta
- Food Safety & Assurance, AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Paul Maclean
- Bioinformatics and Statistics, AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | - Joerg Jores
- Institute of Veterinary Bacteriology, University of Bern, Bern, Switzerland
| | - Axel Heiser
- Animal Health, AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - D. Neil Wedlock
- Animal Health, AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
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Wang J, Li R, Sun X, Liu L, Hao X, Wang J, Yuan W. Development and validation of the isothermal recombinase polymerase amplification assays for rapid detection of Mycoplasma ovipneumoniae in sheep. BMC Vet Res 2020; 16:172. [PMID: 32487081 PMCID: PMC7268655 DOI: 10.1186/s12917-020-02387-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/22/2020] [Indexed: 11/10/2022] Open
Abstract
Background Mycoplasmal pneumonia is an important infectious disease that threatens sheep and goat production worldwide, and Mycoplasma ovipneumoniae is one of major etiological agent causing mycoplasmal pneumonia. Recombinase polymerase amplification (RPA) is an isothermal nucleic acid amplification technique, and RPA-based diagnostic assays have been described for the detection of different types of pathogens. Results The RPA assays using real-time fluorescence detection (real-time RPA) and lateral flow strip detection (LFS RPA) were developed to detect M. ovipneumoniae targeting a conserved region of the 16S rRNA gene. Real-time RPA was performed in a portable florescence scanner at 39 °C for 20 min. LFS RPA was performed in a portable metal bath incubator at 39 °C for 15 min, and the amplicons were visualized with the naked eyes within 5 min on the lateral flow strip. Both assays were highly specific for M. ovipneumoniae, as there were no cross-reactions with other microorganisms tested, especially the pathogens involved in respiratory complex and other mycoplasmas frequently identified in ruminants. The limit of detection of LFS RPA assay was 1.0 × 101 copies per reaction using a recombinant plasmid containing target gene as template, which is 10 times lower than the limit of detection of the real-time RPA and real-time PCR assays. The RPA assays were further validated on 111 clinical sheep nasal swab and fresh lung samples, and M. ovipneumoniae DNA was detected in 29 samples in the real-time RPA, 31 samples in the LFS RPA and 32 samples in the real-time PCR assay. Compared to real-time PCR, the real-time RPA and LFS RPA showed diagnostic specificity of 100 and 98.73%, diagnostic sensitivity of 90.63 and 93.75%, and a kappa coefficient of 0.932 and 0.934, respectively. Conclusions The developed real-time RPA and LFS RPA assays provide the attractive and promising tools for rapid, convenient and reliable detection of M. ovipneumoniae in sheep, especially in resource-limited settings. However, the effectiveness of the developed RPA assays in the detection of M. ovipneumoniae in goats needs to be further validated.
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Affiliation(s)
- Jinfeng Wang
- Technology Center of Shijiazhuang Customs District, Shijiazhuang, 050051, China.,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, 050051, China
| | - Ruiwen Li
- College of Veterinary Medicine, Hebei Agricultural University, No.2596 Lekai South Street, Baoding, Hebei, 071001, People's Republic of China
| | - Xiaoxia Sun
- Technology Center of Shijiazhuang Customs District, Shijiazhuang, 050051, China.,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, 050051, China
| | - Libing Liu
- Technology Center of Shijiazhuang Customs District, Shijiazhuang, 050051, China.,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, 050051, China
| | - Xuepiao Hao
- College of Veterinary Medicine, Hebei Agricultural University, No.2596 Lekai South Street, Baoding, Hebei, 071001, People's Republic of China
| | - Jianchang Wang
- Technology Center of Shijiazhuang Customs District, Shijiazhuang, 050051, China. .,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, 050051, China.
| | - Wanzhe Yuan
- College of Veterinary Medicine, Hebei Agricultural University, No.2596 Lekai South Street, Baoding, Hebei, 071001, People's Republic of China.
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Comparison of three methods of enumeration for Mycoplasma ovipneumoniae. J Microbiol Methods 2019; 165:105700. [PMID: 31446035 DOI: 10.1016/j.mimet.2019.105700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 08/21/2019] [Accepted: 08/21/2019] [Indexed: 11/22/2022]
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9
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Lin Y, Jiang J, Zhang J, You W, Hu Q. Development of a TaqMan real-time PCR for detection of the Mycoplasma mycoides subsp. capri. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Lin Y, Jiang J, Zhang J, You W, Hu Q. Development of a TaqMan real-time PCR for detection of the Mycoplasma mycoidessubsp. capri. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Loop-mediated isothermal amplification-lateral-flow dipstick (LAMP-LFD) to detect Mycoplasma ovipneumoniae. World J Microbiol Biotechnol 2019; 35:31. [PMID: 30701329 PMCID: PMC6353813 DOI: 10.1007/s11274-019-2601-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/18/2019] [Indexed: 11/17/2022]
Abstract
In order to establish a rapid detection method for Mycoplasma ovipneumoniae, this study used the loop-mediated isothermal amplification (LAMP) technique to carry out nucleic acid amplification and chromatographic visualization via a lateral flow dipstick (LFD) assay. The M. ovipneumoniae elongation factor TU gene (EF-TU) was detected using a set of specific primers designed for the EF-TU gene, and the EF-TU FIP was detected by biotin labeling, which was used in the LAMP amplification reaction. The digoxin-labeled probe specifically hybridized with LAMP products, which were visually detected by LFD. Here, we established the M. ovipneumoniae LAMP-LFD rapid detection method and tested the specificity, sensitivity, and clinical application of this method. Results showed that the optimized LAMP performed at 60 °C for 60 min, and LFD can specifically and visually detect M. ovipneumoniae with a minimum detectable concentration at 1.0 × 102 CFU/mL. The sensitivity of LAMP-LFD was 1000 times that of the conventional PCR detection methods, and the clinical lung tissue detection rate was 86% of 50 suspected sheep infected with M. ovipneumoniae. In conclusion, LAMP-LFD was established in this study to detect M. ovipneumoniae, a method that was highly specific, sensitive, and easy to operate, and provides a new method for the prevention and diagnosis of M. ovipneumoniae infection.
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Cassirer EF, Manlove KR, Plowright RK, Besser TE. Evidence for strain-specific immunity to pneumonia in bighorn sheep. J Wildl Manage 2016. [DOI: 10.1002/jwmg.21172] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Kezia R. Manlove
- Center for Infectious Disease Dynamics; Pennsylvania State University; University Park PA 16802 USA
| | - Raina K. Plowright
- Department of Microbiology and Immunology; Montana State University; Bozeman MT 59717 USA
| | - Thomas E. Besser
- Department of Veterinary Microbiology and Pathology and Washington Animal Disease Diagnostic Laboratory; Washington State University; Pullman WA 99164 USA
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