1
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Liu QL, Wang Y, Chen J, Pan GQ, Yue YF, Zhou ZY, Fang WH. Establishment of a TaqMan probe-based qPCR assay for detecting microsporidia Enterospora epinepheli in grouper. JOURNAL OF FISH DISEASES 2024; 47:e13893. [PMID: 38062566 DOI: 10.1111/jfd.13893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 02/09/2024]
Abstract
Enterospora epinepheli is an intranuclear microsporidian parasite causing serious emaciative disease in hatchery-bred juvenile groupers (Epinephelus spp.). Rapid and sensitive detection is urgently needed as its chronic infection tends to cause emaciation as well as white faeces syndrome and results in fry mortality. This study established a TaqMan probe-based real-time quantitative PCR assays targeting the small subunit rRNA (SSU) gene of E. epinepheli. The relationship between the standard curve of cycle threshold (Ct) and the logarithmic starting quantity (SQ) was determined as Ct = -3.177 lg (SQ) + 38.397. The correlation coefficient (R2 ) was 0.999, and the amplification efficiency was 106.4%. The detection limit of the TaqMan probe-based qPCR assay was 1.0 × 101 copies/μL and that is 100 times sensitive than the traditional PCR method. There is no cross-reaction with other aquatic microsporidia such as Ecytonucleospora hepatopenaei, Nucleospora hippocampi, Potaspora sp., Ameson portunus. The intra-assay and inter-assay showed great repeatability and reproducibility. In addition, the test of clinical samples showed that this assay effectively detected E. epinepheli in the grouper's intestine tissue. The established TaqMan qPCR assays will be a valuable diagnostic tool for the epidemiological investigation as well as prevention and control of E. epinepheli.
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Affiliation(s)
- Quan-Lin Liu
- State Key Laboratory of Resource Insects, Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Chongqing, China
- East China Sea Fisheries Research Institute, China Academy of Fishery Sciences, Shanghai, China
| | - Yuan Wang
- East China Sea Fisheries Research Institute, China Academy of Fishery Sciences, Shanghai, China
| | - Jie Chen
- State Key Laboratory of Resource Insects, Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Chongqing, China
| | - Guo-Qing Pan
- State Key Laboratory of Resource Insects, Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Chongqing, China
| | - Yan-Feng Yue
- East China Sea Fisheries Research Institute, China Academy of Fishery Sciences, Shanghai, China
| | - Ze-Yang Zhou
- State Key Laboratory of Resource Insects, Chongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Chongqing, China
| | - Wen-Hong Fang
- East China Sea Fisheries Research Institute, China Academy of Fishery Sciences, Shanghai, China
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2
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Zhong L, Carvalho LA, Gao S, Whyte SK, Purcell SL, Fast MD, Cai W. Transcriptome analysis revealed immune responses in the kidney of Atlantic salmon (Salmo salar) co-infected with sea lice (Lepeophtheirus salmonis) and infectious salmon anemia virus. FISH & SHELLFISH IMMUNOLOGY 2023; 143:109210. [PMID: 37951318 DOI: 10.1016/j.fsi.2023.109210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/17/2023] [Accepted: 11/02/2023] [Indexed: 11/13/2023]
Abstract
Sea lice (Lepeophtheirus salmonis) and infectious salmon anemia virus (ISAv) are two of the most important pathogens in Atlantic salmon (Salmo salar) farming and typically cause substantial economic losses to the industry. However, the immune interactions between hosts and these pathogens are still unclear, especially in the scenario of co-infection. In this study, we artificially infected Atlantic salmon with sea lice and ISAv, and investigated the gene expression patterns of Atlantic salmon head kidneys in response to both lice only and co-infection with lice and ISAv by transcriptomic analysis. The challenge experiment indicated that co-infection resulted in a cumulative mortality rate of 47.8 %, while no mortality was observed in the lice alone infection. We identified 240 differentially expressed genes (DEGs) under the lice alone infection, of which 185 were down-regulated and 55 were up-regulated, while a total of 994 DEGs were identified in the co-infection, of which 206 were down-regulated and 788 were significantly up-regulated. The pathway enrichment analysis revealed that single-infection significantly suppressed the innate immune system (e.g., the complement system), whereas co-infection induced a strong immune response, leading to the activation of immune-related signaling pathways such as Toll-like receptors and NOD-like receptors pathways, as well as significant upregulation of genes related to the activation of interferon and MH class I protein complex. Our results provide the first global transcriptomic study of gene expression in the Atlantic salmon head kidney in response to co-infection with sea lice and ISAv, and provided the baseline knowledge for understanding the immune responses during co-infection.
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Affiliation(s)
- Liang Zhong
- Department of Infectious Diseases and Public Health, and State Key Lab of Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Laura A Carvalho
- Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada
| | - Shengnan Gao
- Department of Infectious Diseases and Public Health, and State Key Lab of Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Shona K Whyte
- Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada
| | - Sara L Purcell
- Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada
| | - Mark D Fast
- Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada.
| | - Wenlong Cai
- Department of Infectious Diseases and Public Health, and State Key Lab of Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong Kong; Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada.
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3
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Rajendran KV, Sood N, Rao BM, Valsalam A, Bedekar MK, Jeena K, Pradhan PK, Paria A, Swaminathan TR, Verma DK, Sood NK. Widespread occurrence of Tilapia parvovirus in farmed Nile tilapia Oreochromis niloticus from India. JOURNAL OF FISH DISEASES 2023. [PMID: 37818735 DOI: 10.1111/jfd.13871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/13/2023]
Abstract
Tilapia parvovirus (TiPV) has been associated with heavy mortalities in tilapia as a single infection or in co-infection with Tilapia lake virus (TiLV). In this study, TiPV was detected in farmed Nile tilapia, Oreochromis niloticus, from two geographical regions of India, Maharashtra and Uttar Pradesh. TiPV-specific polymerase chain reaction (PCR) reported earlier was used in the screening. Tilapia collected from Maharashtra showed characteristic clinical signs, and TiPV was detected along with TiLV and/or Aeromonas spp. However, fish from Uttar Pradesh were apparently healthy and only TiPV could be detected in these samples. A high prevalence of TiPV was recorded from both the geographical locations, Maharashtra and Uttar Pradesh (59.6% and 95.0% respectively). The virus could be detected in tissues such as the spleen, liver, kidney, brain and mucus. The spleen appeared to be the best tissue for detecting TiPV in apparently healthy tilapia. The presence of TiPV was further confirmed through sequencing the PCR products, isolation of the virus in the cell line and electron microscopy. Sequences of the NS1 gene of the two TiPV isolates showed similarity to the earlier reported TiPV isolates. The virus could be successfully propagated in O. niloticus Liver (OnL) cell line, and cytopathic effect was observed as early as 3 days post-infection. Furthermore, the presence of non-enveloped icosahedral to round virus particles measuring about 26-35 nm could be demonstrated in the cytoplasm and nucleus of infected OnL cells in transmission electron microscopy. With this confirmation of the presence of the virus, India is the third country to report TiPV after China and Thailand. The detection of TiPV in co-infection cases with TiLV and in apparently healthy Nile tilapia suggests its wide distribution and potential synergistic effect in co-infection cases. Therefore, this emerging virus needs holistic attention to understand its virulence, host-specificity and epidemiological risk factors.
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Affiliation(s)
| | - Neeraj Sood
- ICAR-National Bureau of Fish Genetic Resources, Uttar Pradesh, Lucknow, India
| | - B Madhusudhana Rao
- ICAR-Central Institute of Fisheries Education, Maharashtra, Mumbai, India
| | - Anisha Valsalam
- ICAR-Central Institute of Fisheries Education, Maharashtra, Mumbai, India
| | - Megha K Bedekar
- ICAR-Central Institute of Fisheries Education, Maharashtra, Mumbai, India
| | - Kezhedath Jeena
- ICAR-Central Institute of Fisheries Education, Maharashtra, Mumbai, India
| | | | - Anutosh Paria
- ICAR-National Bureau of Fish Genetic Resources, Uttar Pradesh, Lucknow, India
| | | | - Dev Kumar Verma
- ICAR-National Bureau of Fish Genetic Resources, Uttar Pradesh, Lucknow, India
| | - Naresh Kumar Sood
- Guru Angad Dev Veterinary and Animal Sciences University, Punjab, Ludhiana, India
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4
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Lertwanakarn T, Purimayata T, Luengyosluechakul T, Grimalt PB, Pedrazzani AS, Quintiliano MH, Surachetpong W. Assessment of Tilapia ( Oreochromis spp.) Welfare in the Semi-Intensive and Intensive Culture Systems in Thailand. Animals (Basel) 2023; 13:2498. [PMID: 37570306 PMCID: PMC10416865 DOI: 10.3390/ani13152498] [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: 06/27/2023] [Revised: 07/25/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Welfare assessments have risen to prominence in the aquaculture industry, with increasing awareness of their significance among stakeholders in Thailand. In this study, we conducted a welfare assessment of tilapia (Oreochromis spp.) farms in Thailand, focusing on health, environmental, behavioural, and nutritional indicators. Comparing semi-intensive (earthen ponds) and intensive farming practices (cage culture), we found significant differences in the overall health score, particularly at farm F due to a disease outbreak (Kruskal-Wallis, p = 0.01). Skin and fin scores varied across farms, indicating their potential as indicators of tilapia health. Environmental assessments revealed differences in transparency between the two culturing systems (Mann-Whitney, p = 0.02). During the harvesting process, tilapia behaviours indicated poor welfare across all farms. However, no statistically significant difference in overall welfare scores was found between the two culturing systems. Correlations were observed between nutritional, environmental, and health indicators, with negative correlations between fish density and water transparency (r = -0.87, p = 0.02), presence of inhabitants (r = -0.78, p = 0.04), feeding behaviours (r = -0.78, p = 0.04), and swimming behaviours during capture (r = -0.98, p = 0.001). These findings provide valuable insights to enhance tilapia-farming practices and welfare in Thailand.
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Affiliation(s)
- Tuchakorn Lertwanakarn
- Department of Veterinary Physiology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand;
| | - Thitima Purimayata
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (T.L.)
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand
| | - Thnapol Luengyosluechakul
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (T.L.)
| | - Pau Badia Grimalt
- FAI Registered Office Company Address, The Barn, Wytham, Oxford OX2 8QJ, UK;
| | | | | | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand
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5
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Pulpipat T, Heckman TI, Boonyawiwat V, Kerddee P, Phatthanakunanan S, Soto E, Surachetpong W. Concurrent infections of Streptococcus iniae and Aeromonas veronii in farmed Giant snakehead (Channa micropeltes). JOURNAL OF FISH DISEASES 2023; 46:629-641. [PMID: 36866813 DOI: 10.1111/jfd.13774] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 05/07/2023]
Abstract
The giant snakehead, Channa micropeltes, is an increasingly important economic freshwater fish in Thailand and other regions of Asia. Presently, giant snakehead are cultured under intensive aquaculture conditions, leading to high stress and conditions favouring disease. In this study, we reported a disease outbreak in farmed giant snakehead with a cumulative mortality of 52.5%, continuing for 2 months. The affected fish exhibited signs of lethargy, anorexia and haemorrhage of the skin and eyes. Further bacterial isolations revealed two different types of colonies on tryptic soy agar: small white, punctate colonies of gram-positive cocci and cream-coloured, round and convex colonies of rod-shaped gram-negative bacteria. Additional biochemical and species-specific PCR analysis based on 16S rRNA confirmed the isolates as Streptococcus iniae and Aeromonas veronii. Multilocus sequence analysis (MLSA) placed the S. iniae isolate into a large clade of strains from clinically infected fish worldwide. Gross necropsy findings showed liver congestion, pericarditis and white nodules in the kidney and liver. Histologically, the affected fish showed focal to multifocal granulomas with inflammatory cell infiltration in kidney and liver, enlarged blood vessels with mild congestion within the meninges of the brain and severe necrotizing and suppurative pericarditis with myocardial infarction. Antibiotic susceptibility tests revealed that S. iniae was sensitive to amoxicillin, erythromycin, enrofloxacin, oxytetracycline, doxycycline and resistant to sulfamethoxazole-trimethoprim, while the A. veronii was susceptible to erythromycin, enrofloxacin, oxytetracycline, doxycycline, sulfamethoxazole-trimethoprim and resistant to amoxicillin. Conclusively, our findings highlighted the natural concurrent bacterial infections in cultured giant snakehead, which support the implementation of appropriate treatment and control strategies.
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Affiliation(s)
- Theeraporn Pulpipat
- Department of Farm Resources and Production Medicine, Faculty of Veterinary Medicine, Kasetsart University, Nakorn Pathom, Thailand
| | - Taylor I Heckman
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California, USA
| | - Visanu Boonyawiwat
- Department of Farm Resources and Production Medicine, Faculty of Veterinary Medicine, Kasetsart University, Nakorn Pathom, Thailand
| | - Pattarawit Kerddee
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Sakuna Phatthanakunanan
- Kamphang Saen Veterinary Diagnostic Center, Faculty of Veterinary Medicine, Kasetsart University, Nakorn Pathom, Thailand
| | - Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California, USA
| | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
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6
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Chen XJ, Huang MY, Wangkahart E, Cai J, Huang Y, Jian JC, Wang B. Immune response and protective efficacy of mannosylated polyethylenimine (PEI) as an antigen delivery vector, administered with a Streptococcus agalactiae DNA vaccine in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2023; 135:108684. [PMID: 36921882 DOI: 10.1016/j.fsi.2023.108684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 02/26/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
This study examined the effectiveness of a DNA vaccine for S. agalactiae that was delivered by mannose-based polyethyleneimine (Man-PEI). The results showed that Man-PEI/pcDNA-Sip stimulated a higher serum antibody titer compared to control or other vaccine groups (p < 0.05). Additionally, it induced higher expression of immune-related genes, and increased activities of superoxide dismutase (SOD), acid phosphatase (ACP) and alkaline phosphatase (AKP). Furthermore, the Man-PEI/pcDNA-Sip group showed an improved relative percent survival (RPS) of 85.71%. These results demonstrate the potential value of Man-PEI as a vaccine delivery vehicle, and suggest that it can be effective in boosting the immune protective rate induced by pcDNA-Sip vaccines.
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Affiliation(s)
- Xin-Jin Chen
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China
| | - Man-Yu Huang
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China
| | - Eakapol Wangkahart
- Laboratory of Fish Immunology and Nutrigenomics, Applied Animal and Aquatic Sciences Research Unit, Division of Fisheries, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, 44150, Thailand
| | - Jia Cai
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China
| | - Yu Huang
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China
| | - Ji-Chang Jian
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China
| | - Bei Wang
- Guangdong Ocean University, College of Fishery, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Zhanjiang, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China.
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7
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Prasartset T, Surachetpong W. Simultaneous detection of three important viruses affecting tilapia using a multiplex PCR assay. JOURNAL OF FISH DISEASES 2023; 46:459-464. [PMID: 36441848 DOI: 10.1111/jfd.13734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Tharinthon Prasartset
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
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8
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Zhao H, Zhou Y, Fan Y, Jiang N, Meng Y, Li Y, Xue M, Xu C, Guo W, Liu W. Development and application of a sensitive droplet digital PCR-based method to detect tilapia parvovirus. JOURNAL OF FISH DISEASES 2023; 46:239-245. [PMID: 36591869 DOI: 10.1111/jfd.13738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Tilapia parvovirus (TiPV) causes severe mortality rates in cultured tilapia, resulting in substantial losses to the fish industry. Droplet digital PCR (ddPCR) is a sensitive, accurate, and absolute quantitation method, plus it does not require a standard curve. Herein we report the development and application of a sensitive ddPCR-based method to rapidly detect and quantify TiPV. Optimal annealing temperature was determined to be 59.3°C, and optimal primer and probe concentrations were 900 nmol/L and 250 nmol/L, respectively. Our ddPCR method was highly specific to TiPV and showed no cross-reactivity with other viruses. Further, the detection limit of ddPCR was 0.07 copies/μl, being lower than that of real-time PCR (qPCR, 4.63 copies/μl). We also investigated the ability of ddPCR to detect TiPV in 50 samples and compared the outcome with qPCR data in terms of sensitivity and accuracy. The results showed that the positive detection rate of ddPCR (32%) was higher than that of qPCR (18%). To conclude, our ddPCR method was effective at detecting TiPV in samples with low viral loads. We believe that its application can facilitate the surveillance of sources and transmission routes of TiPV.
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Affiliation(s)
- Haikuo Zhao
- College of Oceanography, Hainan University, Haikou, China
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yong Zhou
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yuding Fan
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Nan Jiang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yan Meng
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yiqun Li
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Mingyang Xue
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Chen Xu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Weiliang Guo
- College of Oceanography, Hainan University, Haikou, China
| | - Wenzhi Liu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
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9
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Hao X, Li Y, Chen B, Wang H, Wang X, Xiao X, Zhou P, Li S. Detection of FeChPV in a cat shelter outbreak of upper respiratory tract disease in China. Front Microbiol 2022; 13:1064747. [PMID: 36569076 PMCID: PMC9773189 DOI: 10.3389/fmicb.2022.1064747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/14/2022] [Indexed: 12/14/2022] Open
Abstract
Feline parvovirus often causes a fatal infectious disease and has a serious impact on domestic cats and wild felines. Feline chaphamaparvovirus (FeChPV) is a novel type of feline parvovirus that has been successively identified in Canada, Italy, and Turkey. The prevalence and pathogenicity of FeChPV in other regions is still unknown. In this study, we recorded the detection of FeChPV in a cat shelter in China. A high prevalence (81.08%, 30/37) of FeChPV was detected in cats with symptoms of upper respiratory tract disease (URTD) in this cat shelter. Multiple pathogen testing indicated high coinfection rates of 80% (24/30) with other common viruses in FeChPV-positive cats. Analyses of the necropsy and histopathological findings revealed severe lymphadenitis, encephalitis, and viral DNA in several tissues (including brain) of the deceased cat. Finally, we obtained nearly full-length genomes of four strains with 98.4%~98.6% homology with previously reported genomes. Notably, VP1 proteins showed seven unique amino acid mutations, while NS1 proteins carried eight mutations. In the evolutionary tree based on VP1 and NS1, the sequences clustered in a large branch with Italian and Canadian FeChPV strains. Given the possible association of FeChPV with URTD, further studies are necessary to evaluate the pathogenicity and epidemiological characteristics of this novel feline pathogen.
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Affiliation(s)
- Xiangqi Hao
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yanchao Li
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Bo Chen
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Hanhong Wang
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Xinrui Wang
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Xiangyu Xiao
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Pei Zhou
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,*Correspondence: Pei Zhou,
| | - Shoujun Li
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Guangdong Provincial Pet Engineering Technology Research Center, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,Shoujun Li,
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10
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Phusantisampan T, Yamkasem J, Tattiyapong P, Sriariyanun M, Surachetpong W. Specific and rapid detection of tilapia parvovirus using loop-mediated isothermal amplification (LAMP) method. JOURNAL OF FISH DISEASES 2022; 45:1893-1898. [PMID: 36048556 DOI: 10.1111/jfd.13712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Affiliation(s)
- Theerawut Phusantisampan
- Department of Biotechnology, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand
- Microbial Informatics and Industrial Product of Microbe Research Center, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand
| | - Jidapa Yamkasem
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Puntanat Tattiyapong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Interdisciplinary Program in Genetic Engineering and Bioinformatics, Graduate school, Kasetsart University, Bangkok, Thailand
| | - Malinee Sriariyanun
- Department of Chemical and Process Engineering, Biorefinery and Process Automation Engineering Center, The Sirindhorn Thai-German International Graduate School of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand
| | - Win Surachetpong
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Interdisciplinary Program in Genetic Engineering and Bioinformatics, Graduate school, Kasetsart University, Bangkok, Thailand
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11
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Li Y, Huang Y, Cai J, Jiang D, Jian JC, Lu YS, Wang B. Establishment of an astrocyte-like cell line from the brain of tilapia (Oreochromis niloticus) for virus pathogenesis and a vitro model of the blood-brain barrier. JOURNAL OF FISH DISEASES 2022; 45:1451-1462. [PMID: 35758189 DOI: 10.1111/jfd.13674] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
A new cell line was established from the brain of a cultured fish, tilapia (Oreochromis niloticus), designated as TA-02 (Tilapia Astrocyte clone 02 cell line). The TA-02 cells are grown for 300 days in an L-15 medium supplemented with 10% fetal bovine serum (FBS). This cell line showed excellent proliferative capacity and expressed various neuroglial cell markers, including SOX2, SOX10, Hes1, Notch1, Occludin, E-cadherin, and GFAP. In addition, TA-02 cells were susceptible to Tilapia Lake Virus (TiLV) as demonstrated by the presence of a severe cytopathic effect (CPE), virus particle in a transmission electron microscope (TEM), and PCR positive signal. Bacterial cytotoxicity studies showed that Streptococcus agalactiae was toxic to TA-02 cells. When co-culture with trans-well, TA-02 exhibited prominent barrier properties, manifested by tight intercellular junctions and increased trans-endothelial electrical resistance (TEER). In addition, the barrier is effective against Escherichia coli (non-meningitis pathogenic bacteria). In contrast, S. agalactiae (meningitis pathogenic bacteria) can pass through the membrane comprising the cells in the trans-well insert. The newly established TA-02 cell line provided a valuable tool for virus pathogenesis and a vitro model of the fish blood-brain barrier.
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Affiliation(s)
- Yuan Li
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, Guangdong, China
| | - Yu Huang
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, P. R. China
| | - Jia Cai
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, P. R. China
| | - Dongneng Jiang
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
| | - Ji-Chang Jian
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, P. R. China
| | - Yi-Shan Lu
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, Guangdong, China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, P. R. China
| | - Bei Wang
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy culture, Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, College of Fishery, Guangdong Ocean University, Zhanjiang, P. R. China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, P. R. China
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12
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Dong HT, Sangpo P, Dien LT, Mai TT, Linh NV, Del-Pozo J, Salin KR, Senapin S. Usefulness of the pancreas as a prime target for histopathological diagnosis of Tilapia parvovirus (TiPV) infection in Nile tilapia, Oreochromis niloticus. JOURNAL OF FISH DISEASES 2022; 45:1323-1331. [PMID: 35638102 DOI: 10.1111/jfd.13663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/12/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Tilapia parvovirus (TiPV) is an emerging virus reportedly associated with disease and mortality in farmed tilapia. Although previous descriptions of histopathological changes are available, the lesions reported in these are not pathognomonic. Here, we report Cowdry type A inclusion bodies (CAIB) in the pancreas as a diagnostic histopathological feature found in adult Nile tilapia naturally infected with TiPV. This type of inclusion body has been well-known as a histopathological landmark for the diagnosis of other parvoviral infections in shrimp and terrestrial species. Interestingly, this lesion could be exclusively observed in pancreatic acinar cells, both in the hepatopancreas and pancreatic tissue along the intestine. In situ hybridization (ISH) using a TiPV-specific probe revealed the intranuclear presence of TiPV DNA in multiple tissues, including the liver, pancreas, kidney, spleen, gills and the membrane of oocytes in the ovary. These findings suggest that although TiPV can replicate in several tissue types, CAIB manifest exclusively in pancreatic tissues. In addition to TiPV, most diseased fish were co-infected with Streptococcus agalactiae, and presented with multifocal granulomas secondary to this bacterial infection. Partial genome amplification of TiPV was successful and revealed high nucleotide identity (>99%) to previously reported isolates. In summary, this study highlights the usefulness of pancreatic tissue as a prime target for histopathological diagnosis of TiPV in diseased Nile tilapia. This pattern may be critical when determining the presence of TiPV infection in new geographic areas, where ancillary testing may not be available. TiPV pathogenesis in this landmark organ warrants further investigation.
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Affiliation(s)
- Ha Thanh Dong
- AARM/FAB, School of Environment, Resources and Development, Asian Institute of Technology, Pathum Thani, Thailand
| | - Pattiya Sangpo
- Fish Heath Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Le Thanh Dien
- Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Thao Thu Mai
- Division of Aquacultural Biotechnology, Biotechnology Center of Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Nguyen Vu Linh
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
| | - Jorge Del-Pozo
- Easter Bush Pathology, Royal (Dick) School of Veterinary Studies, Edinburgh, UK
| | - Krishna R Salin
- AARM/FAB, School of Environment, Resources and Development, Asian Institute of Technology, Pathum Thani, Thailand
| | - Saengchan Senapin
- Fish Heath Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
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13
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Yamkasem J, Prasartset T, Tattiyapong P, Sirikanchana K, Mongkolsuk S, Soto E, Surachetpong W. Persistence of Tilapia tilapinevirus in fish rearing and environmental water and its ability to infect cell line. JOURNAL OF FISH DISEASES 2022; 45:679-685. [PMID: 35218230 DOI: 10.1111/jfd.13593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Tilapia tilapinevirus, or Tilapia Lake Virus (TiLV), is a RNA virus associated with mass morbidity and mortality in tilapia, leading to severe economic losses for global tilapia aquaculture. In this study, we investigated the persistence of TiLV in water by spiking sterile distilled water (SDW), freshwater collected from rearing fish tanks (FW) and natural pond water (PW) at 27°C as a representative of environmental water conditions with 0.6 ml of stock virus (3.18 × 107 viral copies/ml of water). The water samples were filtered through an electronegative charge membrane and quantified using reverse transcriptase quantitative PCR at 0, 3, 5, 7, 10 and 14 days post-inoculation. The results revealed that TiLV RNA in SDW was reduced by 1.34 log10 in 14 days. A similar approximately 4 log10 removal of the virus in FW and PW was observed at 3 and 7 days, respectively. Moreover, the infectivity of TiLV was further studied; the virus lost its infectivity in E-11 cells after 1 day in SDW, FW and PW water samples, even though the virus was spiked 10 more times than in the viral persistence study. Taken together, the results could be applied to improving biosecurity practices in tilapia farms by disinfecting or resting reservoir water for at least three to five days prior to stocking tilapia, to limit the spread of TiLV.
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Affiliation(s)
- Jidapa Yamkasem
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Tharinthon Prasartset
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Puntanat Tattiyapong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Interdisciplinary Program in Genetic Engineering and Bioinformatics, Graduate school, Kasetsart University, Bangkok, Thailand
| | | | - Skorn Mongkolsuk
- Research Laboratory of Biotechnology, Chulabhorn Research Institute, Bangkok, Thailand
| | - Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California, USA
| | - Win Surachetpong
- Graduate Program in Animal Health and Biomedical Science, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
- Interdisciplinary Program in Genetic Engineering and Bioinformatics, Graduate school, Kasetsart University, Bangkok, Thailand
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14
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Reuter G, Boros Á, Mátics R, Altan E, Delwart E, Pankovics P. A novel parvovirus (family Parvoviridae) in a freshwater fish, zander (Sander lucioperca). Arch Virol 2022; 167:1163-1167. [PMID: 35278130 PMCID: PMC8964545 DOI: 10.1007/s00705-022-05419-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 02/02/2022] [Indexed: 11/30/2022]
Abstract
In this study, a novel parvovirus (zander/M5/2015/HUN, OK236393) was detected in faecal specimens from a fish – zander or pikeperch (Sander lucioperca) – and genetically characterized using viral metagenomics and PCR methods. The NS1 and VP1 proteins of zander/M5/2015/HUN share <30% aa sequence identity, respectively, with the corresponding proteins of known members of the family Parvoviridae. Out of 62 faecal specimens collected from 13 freshwater fish species, three (4.8%) samples were positive by PCR for the novel parvovirus – all from zander. This is the second parvovirus detected in fish – after the disease-causing tilapia parvovirus of the subfamily Hamaparvovirinae – and it potentially represents a novel genus in the subfamily Parvovirinae.
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Affiliation(s)
- Gábor Reuter
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Szigeti út 12., 7624, Pécs, Hungary.
| | - Ákos Boros
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Szigeti út 12., 7624, Pécs, Hungary
| | | | - Eda Altan
- Vitalant Research Institute, San Francisco, CA, USA
| | - Eric Delwart
- Vitalant Research Institute, San Francisco, CA, USA
- University of California, San Francisco, CA, USA
| | - Péter Pankovics
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Szigeti út 12., 7624, Pécs, Hungary
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15
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Yamkasem J, Tattiyapong P, Surachetpong W. Development and application of TaqMan probe-based quantitative PCR assays for the detection of tilapia parvovirus. JOURNAL OF FISH DISEASES 2022; 45:379-386. [PMID: 34871459 DOI: 10.1111/jfd.13565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/12/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Tilapia parvovirus (TiPV) is a novel parvovirus associated with high mortality in Nile tilapia and red hybrid tilapia, leading to severe economic losses for tilapia aquaculture. It is critical to develop a sensitive and accurate assay to detect TiPV in fish tissues. In this study, new TaqMan probe-based quantitative PCR (qPCR) assays targeting the non-structural (NS) and viral protein (VP) genes of TiPV were developed. The standard curves of the assays were 95.64%-98.96% over a wide linear range of 109 -101 copies of the corresponding standard DNA per reaction. The intra- and inter-assay coefficients of variation were in the ranges 0.54%-2.50% and 0.13%-1.17%, respectively, which suggests good repeatability and reproducibility. The detection limit of the TaqMan TiPV assays was 10 copies/µl. The application of the TaqMan qPCR assays to field samples revealed that they had comparable sensitivity to a previously developed SYBR Green qPCR, but more sensitive than the conventional PCR. No cross-reactivity of the TaqMan TiPV assays was found with the samples infected with other viruses and bacteria. Overall, the assays offered high sensitivity and specificity in the detection of low concentrations of TiPV DNA in infected tilapia samples. These new TaqMan qPCR assays could provide a valuable diagnostic tool for the reliable and specific detection of TiPV in experimental and field samples.
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Affiliation(s)
- Jidapa Yamkasem
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Puntanat Tattiyapong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
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16
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Jager MC, Tomlinson JE, Lopez-Astacio RA, Parrish CR, Van de Walle GR. Small but mighty: old and new parvoviruses of veterinary significance. Virol J 2021; 18:210. [PMID: 34689822 PMCID: PMC8542416 DOI: 10.1186/s12985-021-01677-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/08/2021] [Indexed: 12/14/2022] Open
Abstract
In line with the Latin expression "sed parva forti" meaning "small but mighty," the family Parvoviridae contains many of the smallest known viruses, some of which result in fatal or debilitating infections. In recent years, advances in metagenomic viral discovery techniques have dramatically increased the identification of novel parvoviruses in both diseased and healthy individuals. While some of these discoveries have solved etiologic mysteries of well-described diseases in animals, many of the newly discovered parvoviruses appear to cause mild or no disease, or disease associations remain to be established. With the increased use of animal parvoviruses as vectors for gene therapy and oncolytic treatments in humans, it becomes all the more important to understand the diversity, pathogenic potential, and evolution of this diverse family of viruses. In this review, we discuss parvoviruses infecting vertebrate animals, with a special focus on pathogens of veterinary significance and viruses discovered within the last four years.
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Affiliation(s)
- Mason C Jager
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Joy E Tomlinson
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Robert A Lopez-Astacio
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Colin R Parrish
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Gerlinde R Van de Walle
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.
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17
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Waiyamitra P, Piewbang C, Techangamsuwan S, Liew WC, Surachetpong W. Infection of Tilapia tilapinevirus in Mozambique Tilapia ( Oreochromis mossambicus), a Globally Vulnerable Fish Species. Viruses 2021; 13:v13061104. [PMID: 34207768 PMCID: PMC8228971 DOI: 10.3390/v13061104] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 06/05/2021] [Accepted: 06/06/2021] [Indexed: 12/16/2022] Open
Abstract
Tilapia tilapinevirus, or tilapia lake virus (TiLV), is a highly contagious virus found in tilapia and its hybrid species that has been reported worldwide, including in Asia, the Americas, and Africa. In this study, we experimentally challenged Mozambique tilapia (Oreochromis mossambicus) with a virulent TiLV strain, VETKU-TV01, at both low (1 × 103 TCID50/mL) and high (1 × 105 TCID50/mL) concentration. After the challenge, the Mozambique tilapia showed pale skin with some hemorrhage and erosion, lethargy, abdominal swelling, congestion around the eye, and exophthalmos; there was a cumulative mortality rate at 48.89% and 77.78% in the groups that received the low and high concentration, respectively. Quantitative PCR and in situ hybridization confirmed the presence of TiLV in the internal organs of moribund fish. Notably, severe histopathological changes, including glycogen depletion, syncytial hepatic cells containing multiple nuclei and intracytoplasmic inclusion bodies, and infiltration of melanomacrophage into the spleen, were frequently found in the Mozambique tilapia challenged with high TiLV concentration. Comparatively, the infectivity and pathology of the TiLV infection in Mozambique tilapia and red hybrid tilapia (Oreochromis spp.) were found to be similar. Our results confirmed the susceptibility of Mozambique tilapia, which has recently been determined to be a vulnerable species, to TiLV infection, expanding knowledge that the virus can cause disease in this fish species.
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Affiliation(s)
- Pitchaporn Waiyamitra
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand;
| | - Chutchai Piewbang
- Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand; (C.P.); (S.T.)
- Animal Virome and Diagnostic Development Research Group, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Somporn Techangamsuwan
- Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand; (C.P.); (S.T.)
- Animal Virome and Diagnostic Development Research Group, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Woei Chang Liew
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore;
| | - Win Surachetpong
- Department of Veterinary Microbiology and Immunology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand;
- Correspondence:
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