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Qin Z, Nai Z, Li G, He X, Wang W, Xia J, Chao W, Li L, Jiang X, Liu D. The Oral Inactivated Porcine Epidemic Diarrhea Virus Presenting in the Intestine Induces Mucosal Immunity in Mice with Alginate-Chitosan Microcapsules. Animals (Basel) 2023; 13:ani13050889. [PMID: 36899746 PMCID: PMC10000104 DOI: 10.3390/ani13050889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 03/05/2023] Open
Abstract
The porcine epidemic diarrhea virus, PEDV, which causes diarrhea, vomiting and death in piglets, causes huge economic losses. Therefore, understanding how to induce mucosal immune responses in piglets is essential in the mechanism and application against PEDV infection with mucosal immunity. A method of treatment in our research was used to make an oral vaccine that packaged the inactive PEDV with microencapsulation, which consisted of sodium alginate and chitosan, and adapted the condition of the gut in mice. The in vitro release experiment of microcapsules showed that inactive PEDV was not only easily released in saline and acid solutions but also had an excellent storage tolerance, and was suitable for use as an oral vaccine. Interestingly, both experimental groups with different doses of inactive virus enhanced the secretion of specific antibodies in the serum and intestinal mucus, which caused the effective neutralization against PEDV in the Vero cell by both IgG and IgA, respectively. Moreover, the microencapsulation could stimulate the differentiation of CD11b+ and CD11c+ dendritic cells, which means that the microencapsulation was also identified as an oral adjuvant to help phagocytosis of dendritic cells in mice. Flow cytometry revealed that the B220+ and CD23+ of the B cells could significantly increase antibody production with the stimulation from the antigens' PEDV groups, and the microencapsulation could also increase the cell viability of B cells, stimulating the secretion of antibodies such as IgG and IgA in mice. In addition, the microencapsulation promoted the expression of anti-inflammatory cytokines, such as IL-10 and TGF-β. Moreover, proinflammatory cytokines, such as IL-1, TNF-α, and IL-17, were inhibited by alginate and chitosan in the microencapsulation groups compared with the inactivated PEDV group. Taken together, our results demonstrate that the microparticle could play the role of mucosal adjuvant, and release inactivated PEDV in the gut, which can effectively stimulate mucosal and systemic immune responses in mice.
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Affiliation(s)
- Ziliang Qin
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Zida Nai
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Gang Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Xinmiao He
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture, Animal Husbandry Research Institute, Heilongjiang Academy of Agricultural Sciences, No. 368 Xuefu Road, Harbin 150086, China
| | - Wentao Wang
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture, Animal Husbandry Research Institute, Heilongjiang Academy of Agricultural Sciences, No. 368 Xuefu Road, Harbin 150086, China
| | - Jiqiao Xia
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Wang Chao
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture, Animal Husbandry Research Institute, Heilongjiang Academy of Agricultural Sciences, No. 368 Xuefu Road, Harbin 150086, China
| | - Lu Li
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture, Animal Husbandry Research Institute, Heilongjiang Academy of Agricultural Sciences, No. 368 Xuefu Road, Harbin 150086, China
| | - Xinpeng Jiang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
- Correspondence: (X.J.); (D.L.); Tel.: +86-451-55190722 (X.J. & D.L.)
| | - Di Liu
- Key Laboratory of Combining Farming and Animal Husbandry, Ministry of Agriculture, Animal Husbandry Research Institute, Heilongjiang Academy of Agricultural Sciences, No. 368 Xuefu Road, Harbin 150086, China
- Correspondence: (X.J.); (D.L.); Tel.: +86-451-55190722 (X.J. & D.L.)
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Olech M. Current State of Molecular and Serological Methods for Detection of Porcine Epidemic Diarrhea Virus. Pathogens 2022; 11:pathogens11101074. [PMID: 36297131 PMCID: PMC9612268 DOI: 10.3390/pathogens11101074] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/19/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
Porcine epidemic diarrhea virus (PEDV), a member of the Coronaviridae family, is the etiological agent of an acute and devastating enteric disease that causes moderate-to-high mortality in suckling piglets. The accurate and early detection of PEDV infection is essential for the prevention and control of the spread of the disease. Many molecular assays have been developed for the detection of PEDV, including reverse-transcription polymerase chain reaction (RT-PCR), real-time RT-PCR (qRT-PCR) and loop-mediated isothermal amplification assays. Additionally, several serological methods have been developed and are widely used for the detection of antibodies against PEDV. Some of them, such as the immunochromatography assay, can generate results very quickly and in field conditions. Molecular assays detect viral RNA in clinical samples rapidly, and with high sensitivity and specificity. Serological assays can determine prior immune exposure to PEDV, can be used to monitor the efficacy of vaccination strategies and may help to predict the duration of immunity in piglets. However, they are less sensitive than nucleic acid-based detection methods. Sanger and next-generation sequencing (NGS) allow the analysis of PEDV cDNA or RNA sequences, and thus, provide highly specific results. Furthermore, NGS based on nonspecific DNA cleavage in clustered regularly interspaced short palindromic repeats (CRISPR)–Cas systems promise major advances in the diagnosis of PEDV infection. The objective of this paper was to summarize the current serological and molecular PEDV assays, highlight their diagnostic performance and emphasize the advantages and drawbacks of the application of individual tests.
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Affiliation(s)
- Monika Olech
- Department of Pathology, National Veterinary Research Institute, 24-100 Puławy, Poland
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Li R, Tian X, Pang J, Li L, Yuan J, Tian Z, Wang Z. Point-of-Care Tests for Rapid Detection of Porcine Epidemic Diarrhea Virus: A Systematic Review and Meta-Analysis. Viruses 2022; 14:v14071355. [PMID: 35891337 PMCID: PMC9321219 DOI: 10.3390/v14071355] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/07/2022] [Accepted: 06/17/2022] [Indexed: 12/21/2022] Open
Abstract
The timely and accurate diagnosis of porcine epidemic diarrhea virus (PEDV) infection is crucial to reduce the risk of viral transmission. Therefore, the objective of this review was to evaluate the overall diagnostic accuracy of rapid point-of-care tests (POCTs) for PEDV. Studies published before 7 January 2022 were identified by searching PubMed, EMBASE, Springer Link, and Web of Science databases, using subject headings or keywords related to point of care and rapid test diagnostic for PEDV and PED. Two investigators independently extracted data, rated risk of bias, and assessed the quality using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. The bivariate model and the hierarchical summary receiver operating characteristic (HSROC) model were used for performing the meta-analysis. Threshold effect, subgroup analysis, and meta-regression were applied to explore heterogeneity. Of the 2908 records identified, 24 eligible studies involving 3264 specimens were enrolled in the meta-analysis, including 11 studies on evaluation of lateral flow immunochromatography assay (ICA)-based, and 13 on nucleic acid isothermal amplification (NAIA)-based POCTs. The overall pooled sensitivity, specificity and diagnostic odds ratio (DOR) were 0.95 (95% CI: 0.92–0.97), 0.96 (95% CI 0.88–0.99) and 480 (95% CI 111–2074), respectively; for ICA-based POCTs and the corresponding values for NAIA-based, POCTs were 0.97 (95% CI 0.94–0.99), 0.98 (95% CI 0.91–0.99) and 1517 (95% CI 290–7943), respectively. The two tests showed highly comparable and satisfactory diagnostic performance in clinical utility. These results support current recommendations for the use of rapid POC tests when PEDV is suspected.
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Affiliation(s)
- Renfeng Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; (R.L.); (J.P.); (L.L.); (J.Y.); (Z.W.)
| | - Xiangqin Tian
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang 453003, China
- Correspondence:
| | - Junzeng Pang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; (R.L.); (J.P.); (L.L.); (J.Y.); (Z.W.)
| | - Linyue Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; (R.L.); (J.P.); (L.L.); (J.Y.); (Z.W.)
| | - Jiakang Yuan
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; (R.L.); (J.P.); (L.L.); (J.Y.); (Z.W.)
| | - Zhuangzhuang Tian
- School of International Education, Xinxiang Medical University, Xinxiang 453003, China;
| | - Ziliang Wang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; (R.L.); (J.P.); (L.L.); (J.Y.); (Z.W.)
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Zhao P, Huang X, Tao H, Li Y, Sun L, Hu J. The antibody orientational labeled by StaphylococcusA protein improve the sensitivity of Gold Immunochromatography Assay. Anal Biochem 2021; 641:114403. [PMID: 34610335 DOI: 10.1016/j.ab.2021.114403] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/18/2021] [Accepted: 09/30/2021] [Indexed: 11/19/2022]
Abstract
The antibody of Cry1Ab-51 was immobilized orientationly in a simple and effective way on Colloidal gold nanoparticles(CGNP) by The staphylococcal protein A(SPA) affinity with the FC fragement of mouse IgG.The lateral flow detection test strip assembled with the probe by orientational labeled method at the optimum operational conditons (new probe) is 10 times more sensitive than the test strip assembled with the probe labeled by Adsorption(conventionally probe). The affinity experiment have shown that the affinity of the new probe is much higher than the conventionally probe. The Immunochromatography gold strip(ICG strip) assembled by the new probe was highly specific to Cry1Ab with no cross-reaction with other transgenic proteins. And it was proved that the specificity of the new probe have no significant change. Furthermore, the ICG strips assembled by the new probe could be stored for 12 months under dry conditions without significant loss of sensitivity.The Orientational labeling the antibodies with Staphylococcus A protein on Colloidal gold proved to be suitable for improving the sensitivity of the ICG strips.
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Affiliation(s)
- Penghua Zhao
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Central Lab of Shaanxi Provincial People's Hospital, Xi'an, 710068, China.
| | - Xiaoyan Huang
- Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Haiqiang Tao
- Shaanxi HaiNa Bio-tech Co. Ltd., Xi'an, 710032, China
| | - Yaping Li
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Central Lab of Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Lijun Sun
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Central Lab of Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Jun Hu
- Shaanxi Province Research Center of Cell Immunological Engineering and Technology, Central Lab of Shaanxi Provincial People's Hospital, Xi'an, 710068, China
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Bukkitgar SD, Shetti NP, Aminabhavi TM. Electrochemical investigations for COVID-19 detection-A comparison with other viral detection methods. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2021; 420:127575. [PMID: 33162783 PMCID: PMC7605744 DOI: 10.1016/j.cej.2020.127575] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 10/07/2020] [Accepted: 10/26/2020] [Indexed: 05/02/2023]
Abstract
Virus-induced infection such as SARS-CoV-2 is a serious threat to human health and the economic setback of the world. Continued advances in the development of technologies are required before the viruses undergo mutation. The low concentration of viruses in environmental samples makes the detection extremely challenging; simple, accurate and rapid detection methods are in urgent need. Of all the analytical techniques, electrochemical methods have the established capabilities to address the issues. Particularly, the integration of nanotechnology would allow miniature devices to be made available at the point-of-care. This review outlines the capabilities of electrochemical methods in conjunction with nanotechnology for the detection of SARS-CoV-2. Future directions and challenges of the electrochemical biosensors for pathogen detection are covered including wearable and conformal biosensors, detection of plant pathogens, multiplexed detection, and reusable biosensors for on-site monitoring, thereby providing low-cost and disposable biosensors.
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Key Words
- AIV H5N1, Avian influenza
- AIV, Avian influenza virus
- ASFV, African swine fever virus
- BVDV, Bovine viral diarrhea virus
- CGV, Chikungunya viruses
- CMV, Cucumber mosaic virus
- COVID-19
- CSFV, Classic swine fever virus
- CV, Cyclic voltammetry
- DAstV-1, Duck astrovirus 1
- DAstV-2, Duck astrovirus 2
- DENV, Dengue virus
- DEV, Duck enteritis virus
- DHAV-1, Duck hepatitis A virus 1
- DHAV-3, Duck hepatitis A virus 3
- DPV, Differential pulse voltammetry
- DRV-1, Duck reovirus 1
- DRV-2, Duck reovirus 2
- Detection
- EBV, Epstein-Barr virus
- EIS, Electric impedance spectroscopy
- EPC, External positive controls
- EV, Human enterovirus
- EV71, Human enterovirus 71
- Electrochemical sensor
- FMI SMOF, Fluorescence molecularly imprinted sensor based on a metal–organic framework
- GCE, Glassy carbon electrode
- GCFaV-1, Ginger chlorotic fleck associated virus 1
- GCFaV-2, Ginger chlorotic fleck-associated virus 2
- GEV VN-96, Gastroenteritis virus VN-96
- GPV, Goose parvovirus
- HHV, Human herpes virus 6
- HIAV, Human influenza A viruses
- HPB19, Human parvovirus B19
- HSV, Herpes simplex
- IAV, influenza A virus
- IEA, Interdigitated electrode array
- IMA, Interdigitated microelectrode array
- INAA, Isothermal nucleic acid amplification-based
- JEV, Japanese encephalitis virus
- LAMP, Loop-Mediated Isothermal Amplification
- LSV, Linear sweep voltammetry
- MERS, Middle East respiratory syndrome
- MIEC, Molecularly imprinted electrochemiluminescence
- MNV, Murine norovirus
- MeV, Measles virus
- NNV, Nervous necrosis virus
- Nanotechnology
- PBoV, Porcine bocavirus
- PCNAME, Pt-coated nanostructured alumina membrane electrode
- PCR
- PCRLFS, Polymerase Chain Reaction with a lateral flow strip with a lateral flow strip
- PCV, Porcine circovirus 3
- PEDV, Porcine epidemic diarrhoea virus
- PRRSV, porcine reproductive and respiratory syndrome virus
- PSV, Pseudorabies virus
- RCA, Rolling circle amplification
- RGO, Reduced graphene oxide
- RT-LAMP-VF, RT-LAMP and a vertical flow visualization strip
- RV, Rubella virus
- SARS, Severe acute respiratory syndrome
- SIVH1N1, Swine influenza virus
- SWV, Square wave voltammetry
- TGEV, transmissible gastroenteritis coronavirus
- TMUV, Tembusu virus
- USEGFET, Ultra-sensitive electrolyte-gated field-effect transistor
- VZV, Varicella-zoster virus
- VZV, varicella-Zoster virus
- Viruses
- ZV, Zika virus
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Affiliation(s)
- Shikandar D Bukkitgar
- Centre for Electrochemical Science and Materials, Department of Chemistry, K.L.E. Institute of Technology, Gokul, Hubballi 580030, Karnataka, India
| | - Nagaraj P Shetti
- Centre for Electrochemical Science and Materials, Department of Chemistry, K.L.E. Institute of Technology, Gokul, Hubballi 580030, Karnataka, India
| | - Tejraj M Aminabhavi
- Pharmaceutical Engineering, Soniya College of Pharmacy, Dharwad 580-007, India
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Zhang B, Wang Y, Jiang C, Wu C, Guo G, Chen X, Qiu S. Valeriana jatamansi Jones Inhibits Rotavirus-Induced Diarrhea via Phosphatidylinositol 3-Kinase/Protein Kinase B Signaling Pathway. J Microbiol Biotechnol 2021; 31:1115-1122. [PMID: 32522968 PMCID: PMC9705907 DOI: 10.4014/jmb.2003.03006] [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: 03/05/2020] [Accepted: 05/18/2020] [Indexed: 12/15/2022]
Abstract
Rotavirus (RV), as the main cause of diarrhea in children under 5 years, contributes to various childhood diseases. Valeriana jatamansi Jones is a traditional Chinese herb and possesses antiviral effects. In this study we investigated the potential mechanisms of V. jatamansi Jones in RV-induced diarrhea. MTT assay was performed to evaluate cell proliferation and the diarrhea mice model was constructed using SA11 infection. Mice were administered V. jatamansi Jones and ribavirin. Diarrhea score was used to evaluate the treatment effect. The enzyme-linked immunosorbent assay was performed to detect the level of cytokines. Western blot and quantitative reverse transcription-PCR were used to determine protein and mRNA levels, respectively. Hematoxylin-eosin staining was applied to detect the pathological change of the small intestine. TdT-mediated dUTP nick-end labeling was conducted to determine the apoptosis rate. The results showed V. jatamansi Jones promoted MA104 proliferation. V. jatamansi Jones downregulated phosphatidylinositol 3-kinase (PI3K) and protein kinase B (AKT) in protein level, which was consistent with the immunohistochemistry results. Moreover, V. jatamansi Jones combined with ribavirin regulated interleukin-1β (IL-1β), interferon γ, IL-6, tumor necrosis factor α, and IL-10, and suppressed secretory immunoglobulin A secretion to remove viruses and inhibit dehydration. V. jatamansi Jones + ribavirin facilitated the apoptosis of small intestine cells. In conclusion, V. jatamansi Jones may inhibit RV-induced diarrhea through PI3K/AKT signaling pathway, and could therefore be a potential therapy for diarrhea.
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Affiliation(s)
- Bin Zhang
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China
| | - Yan Wang
- Food, Animal and Plant Inspection and Quarantine Technical Center of Shanghai Customs, Shanghai 210000, P.R. China
| | - Chunmao Jiang
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China
| | - Caihong Wu
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China,Corresponding author Phone: +86-523-8615-7098 Fax: +86-523-8684-2288 E-mail:
| | - Guangfu Guo
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China
| | - Xiaolan Chen
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China
| | - Shulei Qiu
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu 225300, P.R. China
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Di Nardo F, Chiarello M, Cavalera S, Baggiani C, Anfossi L. Ten Years of Lateral Flow Immunoassay Technique Applications: Trends, Challenges and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2021; 21:5185. [PMID: 34372422 PMCID: PMC8348896 DOI: 10.3390/s21155185] [Citation(s) in RCA: 165] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 12/22/2022]
Abstract
The Lateral Flow Immunoassay (LFIA) is by far one of the most successful analytical platforms to perform the on-site detection of target substances. LFIA can be considered as a sort of lab-in-a-hand and, together with other point-of-need tests, has represented a paradigm shift from sample-to-lab to lab-to-sample aiming to improve decision making and turnaround time. The features of LFIAs made them a very attractive tool in clinical diagnostic where they can improve patient care by enabling more prompt diagnosis and treatment decisions. The rapidity, simplicity, relative cost-effectiveness, and the possibility to be used by nonskilled personnel contributed to the wide acceptance of LFIAs. As a consequence, from the detection of molecules, organisms, and (bio)markers for clinical purposes, the LFIA application has been rapidly extended to other fields, including food and feed safety, veterinary medicine, environmental control, and many others. This review aims to provide readers with a 10-years overview of applications, outlining the trends for the main application fields and the relative compounded annual growth rates. Moreover, future perspectives and challenges are discussed.
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Affiliation(s)
- Fabio Di Nardo
- Department of Chemistry, University of Torino, 10125 Torino, Italy; (M.C.); (S.C.); (C.B.); (L.A.)
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Effects of essential oil on growth performance, digestibility, immunity, and intestinal health in broilers. Poult Sci 2021; 100:101242. [PMID: 34174571 PMCID: PMC8242051 DOI: 10.1016/j.psj.2021.101242] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 04/26/2021] [Accepted: 05/02/2021] [Indexed: 11/22/2022] Open
Abstract
Essential oils (EO) are concentrated hydrophobic liquids containing volatile aromatic compounds obtained from plants, which have properties as withdrawn antibiotic growth promoters. The objective of this study was to explore the effects of EO on growth performance, digestibility, immunity and intestinal health in broilers. A total of 500 1-day-old Arbor Acre broilers were randomly put into five groups with 10 replicate cages containing 10 birds each. Birds in the 5 groups were fed a basal diet (CON), and basal diet with 50, 100, 200 or 400 mg/kg EO (EO0.5, EO1, EO2 and EO4) for 42 d respectively. Birds were euthanized at 21d and 42 d, blood and tissue samples were collected. In the study, the digestibility of DM, GE and EE in groups with EO supplementation were significantly increased compared with CON group (P < 0.05). However, only EO2 and EO4 significantly increased the digestibility of CP compared with CON group (P < 0.05). In contrast to CON group, EO0.5 and EO1 in jejunum at 21 d, and EO1 in jejunum at 42 d markedly increased the activity of sucrase (P < 0.05). In addition, the level of SOD of EO2 and EO4 in serum at 21 d was significantly increased compared with CON group (P < 0.05). What's more, the concentration of intestinal mucosa SIgA in jejunum and ileum at 21 d of groups with EO supplementation was significantly increased compared with CON group (P < 0.05). Moreover, V/C in jejunum at 21 d of groups with EO supplementation, CD in jejunum at 42 d was also significantly increased to compare with CON group (P < 0.05). Furthermore, the expression levels of critical genes associated with nutrient transportation (i.e., GLUT2, SGLT1, SLC38A, SLC79A and SLC27A4) and barrier function (TJP1) were quadratically and linearly up-regulated in jejunum and ileum with EO supplementation (P < 0.05). These results suggest that EO has a positive impact on growth, immunity and intestinal health in broilers, and 200 mg/kg of EO was recommended in broiler diet.
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Porcine enteric coronaviruses: an updated overview of the pathogenesis, prevalence, and diagnosis. Vet Res Commun 2021; 45:75-86. [PMID: 34251560 PMCID: PMC8273569 DOI: 10.1007/s11259-021-09808-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 06/22/2021] [Indexed: 02/07/2023]
Abstract
The recent prevalence of coronavirus (CoV) poses a serious threat to animal and human health. Currently, porcine enteric coronaviruses (PECs), including the transmissible gastroenteritis virus (TGEV), the novel emerging swine acute diarrhoea syndrome coronavirus (SADS-CoV), porcine delta coronavirus (PDCoV), and re-emerging porcine epidemic diarrhoea virus (PEDV), which infect pigs of different ages, have caused more frequent occurrences of diarrhoea, vomiting, and dehydration with high morbidity and mortality in piglets. PECs have the potential for cross-species transmission and are causing huge economic losses in the pig industry in China and the world, which therefore needs to be urgently addressed. Accordingly, this article summarises the pathogenicity, prevalence, and diagnostic methods of PECs and provides an important reference for their improved diagnosis, prevention, and control.
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