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Cui Y, Guo F, Cai X, Cao X, Guo J, Wang H, Yang B, Zhou H, Su X, Blackall PJ, Xu F. Ct value-based real time PCR serotyping of Glaesserella parasuis. Vet Microbiol 2021; 254:109011. [PMID: 33610013 DOI: 10.1016/j.vetmic.2021.109011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/03/2021] [Indexed: 11/24/2022]
Abstract
Glaesserella parasuis is the causative agent of Glässer's disease in swine. Serotyping plays an essential role in prevalence investigations and in the development of vaccination strategies for the prevention of this disease. Molecular serotyping based on variation within the capsule loci of the 15 serovars is more accurate and efficient than traditional serological serotyping. To reduce the running time and facilitate ease of data interpretation, we developed a simple and rapid cycle threshold (Ct) value-based real time PCR (qPCR) method for the identification and serotyping of G. parasuis. The qPCR method distinguished between all 15 serovar reference strains of G. parasuis with efficiency values ranging between 85.5 % and 110.4 % and, R2 values > 0.98. The qPCR serotyping was evaluated using 83 clinical isolates with 43 of the isolates having been previously assigned to a serovar by the gel immuno-diffusion (GID) assay and 40 non-typeable isolates. The qPCR results of 41/43 (95.3 %) isolates were concordant with the GID assay except two isolates of serovar 12 were assigned to serovar 5. In addition, the qPCR serotyping assigned a serovar to each of the 40 non-typeable isolates. Of the 83 isolates tested to assign a serovar, a concordance rate of 98.8 % (82/83) was determined between the qPCR and the previously reported multiplex PCR of Howell et al. (2015) (including those that were either serovars 5 or 12). Despite the inability to differentiate between serovars 5 and 12, the Ct value-based qPCR serotyping represents an attractive alternative to current molecular serotyping method for G. parasuis and could be used for both epidemiological monitoring and the guidance of vaccination programs.
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Affiliation(s)
- Yifang Cui
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Fangfang Guo
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Xuwang Cai
- State Key Laboratory of Agricultural Microbiology, Division of Animal Infectious Disease, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiaoya Cao
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Jie Guo
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Hongjun Wang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Bing Yang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Hongzhuan Zhou
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Xia Su
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China
| | - Patrick J Blackall
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Fuzhou Xu
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China.
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Yang C, Wang L, Schwartz K, Burrough E, Groeltz-Thrush J, Chen Q, Zheng Y, Shen H, Li G. Case Report and Genomic Characterization of a Novel Porcine Nodavirus in the United States. Viruses 2021; 13:v13010073. [PMID: 33430224 PMCID: PMC7825704 DOI: 10.3390/v13010073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/28/2020] [Accepted: 01/05/2021] [Indexed: 02/07/2023] Open
Abstract
Nodaviruses are small bisegmented RNA viruses belonging to the family Nodaviridae. Nodaviruses have been identified in different hosts, including insects, fishes, shrimps, prawns, dogs, and bats. A novel porcine nodavirus was first identified in the United States by applying next-generation sequencing on brain tissues of pigs with neurological signs, including uncontrollable shaking. RNA1 of the porcine nodavirus had the highest nucleotide identity (51.1%) to the Flock House virus, whereas its RNA2 shared the highest nucleotide identity (48%) with the RNA2 segment of caninovirus (Canine nodavirus). Genetic characterization classified porcine nodavirus as a new species under the genus Alphanodavirus. Further studies are needed to understand the pathogenicity and clinical impacts of this virus.
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Affiliation(s)
- Chenghuai Yang
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
- China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Leyi Wang
- Veterinary Diagnostic Laboratory and Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61802, USA;
| | - Kent Schwartz
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Eric Burrough
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Jennifer Groeltz-Thrush
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Qi Chen
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Ying Zheng
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Huigang Shen
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
| | - Ganwu Li
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA; (C.Y.); (K.S.); (E.B.); (J.G.-T.); (Q.C.); (Y.Z.); (H.S.)
- Correspondence: ; Tel.: +1-515-2943-358
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Han Q, Wang J, Li R, Han Q, Yuan W, Wang J. Development of a recombinase polymerase amplification assay for rapid detection of Haemophilus parasuis in tissue samples. Vet Med Sci 2020; 6:894-900. [PMID: 32452632 PMCID: PMC7738723 DOI: 10.1002/vms3.287] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/26/2020] [Accepted: 05/04/2020] [Indexed: 12/31/2022] Open
Abstract
Haemophilus parasuis is the etiological agent of Glässer's disease in swine, which associates with severe economic losses in the swine industry worldwide. A real‐time recombinase polymerase amplification assay (real‐time RPA) was developed for direct and rapid detection of H. parasuis basing on the translation‐initiation factor IF2 (infB) gene. The assay was performed successfully at 39°C for 20 min in Genie III, which is portable and chargeable by battery. The developed assay was highly specific for H. parasuis, and the limit of detection of the assay was 6.0 × 103 fg of H. parasuis genomic DNA, which was the same as that of a real‐time PCR developed previously. The assay was further evaluated on 68 pig tissue samples, and 18 (26.5%), 20 (29.4%), and 8 (11.8%) samples were positive for H. parasuis by the real‐time RPA, real‐time PCR and bacterial isolation, respectively. With the bacteria isolation as the reference method, the real‐time RPA showed a diagnostic specificity of 83.33% and a diagnostic sensitivity of 100%. The above data demonstrated the well‐potentiality and usefulness of the developed real‐time RPA assay in reliable diagnosis of swine Glässer's disease, especially in resource limited settings.
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Affiliation(s)
- Qiaoyi Han
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, China
| | - Jinfeng Wang
- Technology Center of Shijiazhuang Customs, Shijiazhuang, China.,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, China
| | - Ruiwen Li
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, China
| | - Qingan Han
- Hebei Animal Disease Prevention and Control Center, Shijiazhuang, China
| | - Wanzhe Yuan
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, China
| | - Jianchang Wang
- Technology Center of Shijiazhuang Customs, Shijiazhuang, China.,Hebei Academy of Science and Technology for Inspection and Quarantine, Shijiazhuang, China
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Zhang TT, Liu MZ, Yin RH, Yao LQ, Liu BS, Chen ZL. Rapid and simple detection of Glaesserella parasuis in synovial fluid by recombinase polymerase amplification and lateral flow strip. BMC Vet Res 2019; 15:294. [PMID: 31412870 PMCID: PMC6694577 DOI: 10.1186/s12917-019-2039-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 08/02/2019] [Indexed: 01/02/2023] Open
Abstract
Background Glaesserella parasuis (G. parasuis) is an influential pathogen of the pig, which induces high morbidity and mortality in naive pig populations in the pig industry. Accurate and rapid detection of the agent is important for disease control. In this study, a simple recombinase polymerase amplification (RPA) with a Lateral flow (LF) strip (RPA-LF-GPS) was developed to detect G. parasuis. Results The RPA-LF-GPS can specifically detect G. parasuis a limit of 100 CFU from other common related pathogens causing arthritis in the pig. The RPA-LF-GPS assay can use boiled synovial fluid samples as a template with the same sensitivity as other DNA extraction methods. In the detection of clinic positive synovial fluid sample, RPA-LF-GPS is equally sensitive (98.1%) compared with that of PCR (90.4%) (P > 0.05). The whole procedure of the RPA-LF-GPS assay could be finished in 1 hour without professional equipment. Conclusions RPA-LF-GPS assay is a rapid and simple method for point-of-care diagnostic testing for G. parasuis infection.
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Affiliation(s)
- Ting-Ting Zhang
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China
| | - Meng-Zhi Liu
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China
| | - Rong-Huan Yin
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China
| | - Long-Quan Yao
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China
| | - Bao-Shan Liu
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China.
| | - Ze-Liang Chen
- Key Laboratory of Livestock Infectious Diseases in Northeast China, Ministry of Education, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, No. 120 Dongling road, Shenyang, 110866, China.
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Austin-Busse RL, Ladinig A, Balka G, Zoels S, Ritzmann M, Palzer A. Histopathologic lesions in conventional pigs experimentally infected with Haemophilus parasuis serovar 5. Tierarztl Prax Ausg G Grosstiere Nutztiere 2018; 43:91-6. [DOI: 10.15653/tpg-140905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 12/15/2014] [Indexed: 11/22/2022]
Abstract
Summary
Objective: In the present study various tissues of pigs were investigated for the presence of histopathologic lesions after an experimental infection with Haemophilus (H.) parasuis serovar 5. Material and methods: Conventional pigs (n = 36) were divided into a control group B (n = 9) and a challenge group A (n = 27), which was infected intratracheally. Pigs that did not die prior to study termination were euthanized on day 14 post inoculation. Postmortem samples of the lung, heart, liver, kidney, spleen, left tarsal joint capsule and brain were collected. Results: All but one pig with detectable histopathologic lesions (n = 11) showed typical macroscopic changes. Histopatho logic examination of all tissue samples identified pyelitis (n = 10), synovitis (n = 7) and meningitis (n = 7) and all those animals were euthanized prior to study termination. No histopathologic lesions were found in pigs of the control group. The correlations between pyelitis and meningitis, pyelitis and synovitis and synovitis and meningitis were significant (p < 0.001). No significant correlation could be observed between the histopathologic and the clinical examination of the joints. The investigation of samples from the joints by PCR was not significantly correlated with the observed synovitis. The clinical observation of neurologic signs was significantly correlated with meningitis (p = 0.03). A significant correlation (p < 0.001) could be detected between meningitis and the detection of H. parasuis by PCR in brain samples. Conclusions: H. parasuis constantly causes clinical signs and pathologic lesions as soon as it infects the brain while it can infect the joints without causing histopathologic lesions. Pigs with histopathologic lesions do not always show typical clinical signs. Only few studies described the finding of kidney lesions in pigs with Glässer’s disease and this is the first study to describe a pyelitis in pigs experimentally infected with H. parasuis. The observed pyelitis mainly occurred in acute cases.
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Gou H, Li J, Cai R, Song S, Li M, Yang D, Jiang Z, Li Y, Chu P, Li C. Rapid detection of Haemophilus parasuis using cross-priming amplification and vertical flow visualization. J Microbiol Methods 2017; 144:67-72. [PMID: 29128480 DOI: 10.1016/j.mimet.2017.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/04/2017] [Accepted: 11/05/2017] [Indexed: 11/17/2022]
Abstract
Haemophilus parasuis infection is of considerable economic importance in the swine industry due to high morbidity and mortality in naive swine populations. Accurate detection and identification of the causative agent are difficult, yet necessary, for disease control. In this study, a simple and rapid method of cross-priming amplification (CPA) with a vertical flow (VF) visualization strip was established to detect H. parasuis. The reaction can specifically identify 15 serovar reference strains and 57 clinically isolated strains of H. parasuis, with a detection limit of 14CFU. The performance of the CPA-VF assay was evaluated and compared with that of species-specific PCR by testing 62 clinical culture-positive specimens of H. parasuis. The entire process, from specimen processing to analysis of the results, can be completed in 2h without a complicated apparatus. The convenience and speed of the CPA-VF assay in this study make it a suitable choice for epidemiological investigation and point-of-care testing (POCT) for H. parasuis infection.
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Affiliation(s)
- Hongchao Gou
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Juan Li
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Rujian Cai
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Shuai Song
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Miao Li
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Dongxia Yang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Zhiyong Jiang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Yan Li
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Pinpin Chu
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China
| | - Chunling Li
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, China; Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangzhou, China; Guangdong Open Laboratory of Veterinary Public Health, Guangzhou, China.
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Yu J, Wu J, Zhang Y, Guo L, Cong X, Du Y, Li J, Sun W, Shi J, Peng J, Yin F, Wang D, Zhao P, Wang J. Concurrent highly pathogenic porcine reproductive and respiratory syndrome virus infection accelerates Haemophilus parasuis infection in conventional pigs. Vet Microbiol 2012; 158:316-21. [PMID: 22460022 DOI: 10.1016/j.vetmic.2012.03.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/23/2012] [Accepted: 03/02/2012] [Indexed: 10/28/2022]
Abstract
This study was aimed at determining the effect of highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) on Haemophilus parasuis (HPS) in co-infection. A quantitative real-time PCR targeting infB gene, which is conserved among different HPS serotypes, was developed to improve the accuracy and speed of the detection of HPS. A total of 32 four-week-old conventional pigs were distributed randomly into four groups: pigs in group I were intranasally infected with HP-PRRSV first, and were then intraperitoneally inoculated with HPS on 5 days after HP-PRRSV infection; pigs in group II were intranasally inoculated with HP-PRRSV alone; pigs in group III were intraperitoneally inoculated with HPS alone; pigs in group IV were intraperitoneally inoculated with physiological saline. The amount of HPS in serum on 0, 3, 6, 9 and 12 days post-inoculation (dpi) with HPS were detected using the established quantitative real-time PCR. Clinical signs, pathological changes and histopathological lesions were observed. The amount of HPS in serum reached 10(6)copies/μl at 3 dpi with HPS in pigs of group I, while it arrived 10(5.7)copies/μl at 9 dpi with HPS in pigs of group III. The HPS loads in hearts and lungs were much higher than in other tissues. The study showed that HP-PRRSV was able to accelerate HPS infection and loads.
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Affiliation(s)
- Jiang Yu
- Shandong Normal University, Jinan, People's Republic of China
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