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Liu Z, Yang F, Fang M, Wu Q, Fan K, Huang D, Ye Y, Wan G, Song D. Rapid and Sensitive One-Tube Detection of Getah Virus Using RT-LAMP Combined with Pyrococcus furiosus Argonaute. Vet Sci 2025; 12:93. [PMID: 40005853 PMCID: PMC11860293 DOI: 10.3390/vetsci12020093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2024] [Revised: 01/22/2025] [Accepted: 01/23/2025] [Indexed: 02/27/2025] Open
Abstract
Getah virus (GETV) is a mosquito-borne virus that poses a significant threat to both animal and public health. Traditional diagnostic methods for GETV, such as RT-PCR and RT-qPCR, require expensive equipment and complex procedures, making them unsuitable for rapid, on-site detection. The combination of RT-LAMP and PfAgo offers a novel approach for nucleic acid detection, providing high specificity and effective without the need for sophisticated instruments. Herein, we developed a RT-LAMP combined with PfAgo assay for GETV detection. The RT-LAMP assay was conducted at 60~65 °C, and then the RT-LAMP product was cleaved, together with a fluorescent probe, mediated by PfAgo at 95 °C. After optimizing the primary reaction conditions, the detection limit of the RT-LAMP-PfAgo assay was 100 copies/µL. Importantly, there was no cross-reactivity with other viruses, including PEDV, PDCoV, PoRV, PRRSV, and CSFV. Compared to qPCR, analysis of 86 clinical samples showed that LAMP-PfAgo had a consistent positive rate with the qPCR method. In conclusion, we developed a valuable diagnostic tool for the rapid detection of GETV, enabling timely surveillance and control measures to mitigate the impact of GETV outbreaks.
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Affiliation(s)
- Zhong Liu
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
| | - Fosheng Yang
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
| | - Mengtao Fang
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
| | - Qi Wu
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
| | - Ke Fan
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
| | - Dongyan Huang
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
- Jiangxi Engineering Research Center for Animal Health Products, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yu Ye
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
- Jiangxi Engineering Research Center for Animal Health Products, Jiangxi Agricultural University, Nanchang 330045, China
| | - Gen Wan
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
- Jiangxi Engineering Research Center for Animal Health Products, Jiangxi Agricultural University, Nanchang 330045, China
| | - Deping Song
- Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; (Z.L.); (F.Y.); (M.F.); (Q.W.); (K.F.); (D.H.); (Y.Y.); (G.W.)
- Jiangxi Engineering Research Center for Animal Health Products, Jiangxi Agricultural University, Nanchang 330045, China
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Zhong D, Zheng J, Ma Z, Wang Y, Wei J. Rapid Detection of Getah Virus Antibodies in Horses Using a Recombinant E2 Protein-Based Immunochromatographic Strip. Animals (Basel) 2024; 14:2309. [PMID: 39199843 PMCID: PMC11350704 DOI: 10.3390/ani14162309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 08/06/2024] [Accepted: 08/07/2024] [Indexed: 09/01/2024] Open
Abstract
The prevalence and impact of Getah virus (GETV) are significant concerns in China. GETV can infect a wide range of animals, including horses, pigs, sheep, cattle, birds, and humans, resulting in substantial losses in the livestock and agricultural industries. GETV infection can cause the development of ulcers and inflammation in the mouth and gums of horses, which result in pain and discomfort and lead to symptoms such as reduced appetite, drooling, and difficulty chewing. As a result, there is a pressing need for efficient and rapid disease diagnosis methods. However, the currently available diagnostic methods have limitations in terms of operational time, equipment, and the experience of the individuals using them. In this study, a rapid, specific, and sensitive detection method was developed using a colloidal gold-based immunochromatographic strip (ICS) for the detection of antibodies against GETV in horses. To prepare the ICS, the antigen domain of the E2 glycoprotein of GETV was expressed using the Escherichia coli expression system after analysis with DNAstar v7.1 software. The nitrocellulose membrane was coated with rE2 protein or SPA to form the test line and control line, respectively. After optimizing the reaction conditions, the sensitivity, specificity, and repeatability of the strip were verified. The results showed that the test strip had a detection limit of up to 1:320 dilutions for GETV-positive serum, with no cross-reactivity observed with other equine-susceptible pathogens such as equine arteritis virus (EAV), equine herpesvirus-1 (EHV-I), equine infectious anemia virus (EIAV), equine influenza virus (EIV), African horse sickness virus (AHSV), and Japanese encephalitis virus (JEV). Furthermore, the ICS exhibited a concordance rate of 94.0% when testing 182 clinical serum samples compared to the virus neutralization test. Overall, this ICS diagnosis method will be an effective tool for the rapid detection of GETV in the field.
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Affiliation(s)
- Dengke Zhong
- Department of Animal Science and Technology, Shanghai Vocational College of Agriculture and Forestry, Shanghai 201699, China;
| | - Jiayang Zheng
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (J.Z.); (Z.M.)
| | - Zhiyong Ma
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (J.Z.); (Z.M.)
| | - Yan Wang
- Technical Center for Animal, Plant and Food Inspection and Quarantine of Shanghai Customs, Shanghai 200135, China
| | - Jianchao Wei
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (J.Z.); (Z.M.)
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Jiang Z, Qin Y, Zhang L, Xing G, Shi Z, Song W, Dobrikov GM, Chen J, Su S. Development and application of a colloidal-gold immunochromatographic strip for detecting Getah virus antibodies. Appl Microbiol Biotechnol 2024; 108:355. [PMID: 38822832 PMCID: PMC11144135 DOI: 10.1007/s00253-024-13168-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 04/18/2024] [Accepted: 05/02/2024] [Indexed: 06/03/2024]
Abstract
Getah virus (GETV) is a re-emerging mosquito-borne alphavirus that is highly pathogenic, mainly to pigs and horses. There are no vaccines or treatments available for GETV in swine in China. Therefore, the development of a simple, rapid, specific, and sensitive serological assay for GETV antibodies is essential for the prevention and control of GETV. Current antibody monitoring methods are time-consuming, expensive, and dependent on specialized instrumentation, and these features are not conducive to rapid detection in clinical samples. To address these problem, we developed immunochromatographic test strips (ICTS) using eukaryotically expressed soluble recombinant p62-E1 protein of GETV as a labelled antigen, which has good detection sensitivity and no cross-reactivity with other common porcine virus-positive sera. The ICTS is highly compatible with IFA and ELISA and can be stored for 1 month at 37 °C and for at least 3 months at room temperature. Hence, p62-E1-based ICTS is a rapid, accurate, and convenient method for rapid on-site detection of GETV antibodies. KEY POINTS: • We established a rapid antibody detection method that can monitor GETV infection • We developed colloidal gold test strips with high sensitivity and specificity • The development of colloidal gold test strips will aid in the field serologic detection of GETV.
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Affiliation(s)
- Zhiwen Jiang
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Sanya Institute of Nanjing Agricultural University, Sanya, China
| | - Ying Qin
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Sanya Institute of Nanjing Agricultural University, Sanya, China
| | - Letian Zhang
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Gang Xing
- MOA Key Laboratory of Animal Virology, Zhejiang University, Hangzhou, 310058, China
| | - Zhiyu Shi
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wanjie Song
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Georgi M Dobrikov
- Institute of Organic Chemistry With Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 9, 1113, Sofia, Bulgaria
| | - Jie Chen
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shuo Su
- Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology and College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
- Sanya Institute of Nanjing Agricultural University, Sanya, China.
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You D, Wang YL, Ge LP, Zhou YC, Sun J, Lang LQ, Lai SY, Ai YR, Zhu L, Xu ZW. Establishment and application of an indirect ELISA for Getah virus E2 antibody detection. J Virol Methods 2024; 325:114885. [PMID: 38228247 DOI: 10.1016/j.jviromet.2024.114885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/10/2023] [Accepted: 01/11/2024] [Indexed: 01/18/2024]
Abstract
Getah virus (GETV) is a mosquito-transmitted disease that affects animals, causing fever, aseptic meningitis, and abortion. Its prevalence in China poses risks to both animal health and public well-being. Currently, there is a scarcity of seroepidemiological data on GETV due to the absence of commercial antibody detection kits for pigs. The aim of this study is to develop a rapid, accurate, and sensitive ELISA, providing a reliable tool for GETV seroepidemiology and laying the foundation for future commercial assay development. In this study, we removed specific hydrophobic domains and intracellular structures from E2 proteins and constructed the recombinant plasmid pCold-TF-E2. The recombinant protein was expressed using a prokaryotic expression system, and efficient purification of the rE2 protein was achieved using a nickel affinity column. The purified rE2 protein is suitable for the development of an indirect ELISA (rE2 ELISA). Following the optimization of reaction conditions for the rE2-ELISA, the cut-off value was 0.356. Additionally, the rE2-ELISA method showed a positive rate of 37.1% for IgG antibodies against GETV when testing 986 pig clinical serum samples collected from pigs in Sichuan between May 2022 and September 2022. The rE2-ELISA method displayed a 95.1% overall agreement with VNT, boasting a sensitivity of 98.2% and a specificity of 92.6%. These results indicate that IgG ELISA based on rE2 protein is an efficient and economical method for the detection of GETV antibodies in pigs, facilitating the diagnosis and prevention of GETV.
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Affiliation(s)
- Dong You
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yu-Ling Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | | | - Yuan-Cheng Zhou
- Key Laboratory of Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China; Livestock and Poultry Biological Products Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China
| | - Jing Sun
- ChongQing Academy of Animal Sciences, China
| | | | - Si-Yuan Lai
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yan-Ru Ai
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Ling Zhu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, China.
| | - Zhi-Wen Xu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, China.
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