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Gao P, Wang L, Wang S, Li G, Yi C, Wang Y, Li L, Zhang A, Zhou H, Han L. The activity of hyaD contributed to the virulence of avian Pasteurella multocida. Microb Pathog 2024:106768. [PMID: 38960217 DOI: 10.1016/j.micpath.2024.106768] [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: 04/19/2024] [Revised: 06/06/2024] [Accepted: 06/29/2024] [Indexed: 07/05/2024]
Abstract
Fowl cholera is an infectious disease that affects both poultry and wild birds, characterized by hemorrhagic and septicemic symptoms, caused by Pasteurella multocida (P. multocida), and leading to substantial economic losses in the poultry sector. The development of genetic engineering vaccines against avian P. multocida encountered early-stage challenges due to the limited availability of effective gene editing tools. Presently, NgAgoDM-enhanced homologous recombination stands as a potent technique for achieving efficient gene knockout in avian P. multocida. Hence, this study employed NgAgoDM-enhanced homologous recombination to target and knockout hyaE (239-359aa), hyaD, hexABC, and hexD, denoted as ΔhyaE (239-359aa), ΔhyaD, ΔhexABC, and ΔhexD, respectively. Additionally, we generated a hyaD recovery strain with two point mutations, designated as mhyaD. Thus, this study systematically examined the impact of capsular synthetic gene clusters on the pathogenicity of P. multocida. Moreover, the study demonstrated the critical role of hyaD activity in the virulence of avian P. multocida. This study offers novel insights for enhancing attenuated vaccines further.
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Affiliation(s)
- Peiying Gao
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China
| | - Libo Wang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China
| | - Shan Wang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China; Wuhan Keqian Biology Co., Ltd. Wuhan 430070, China
| | - Guohong Li
- Wuhan Keqian Biology Co., Ltd. Wuhan 430070, China
| | - Chenyang Yi
- Wuhan Keqian Biology Co., Ltd. Wuhan 430070, China
| | - Yuhua Wang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China
| | - Long Li
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of the People's Republic of China, Wuhan 430070, China
| | - Anding Zhang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of the People's Republic of China, Wuhan 430070, China
| | - Hongbo Zhou
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of the People's Republic of China, Wuhan 430070, China
| | - Li Han
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, Huazhong Agricultural University. Wuhan 430070, China; Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production. Wuhan 430070, China.
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2
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Fegan JE, Waeckerlin RC, Tesfaw L, Islam EA, Deresse G, Dufera D, Assefa E, Woldemedhin W, Legesse A, Akalu M, Bayissa B, Nguyen QH, Ng D, Ahn SK, Schryvers AB, Tefera TA, Moraes TF, Gray-Owen SD. Developing a PmSLP3-based vaccine formulation that provides robust long-lasting protection against hemorrhagic septicemia-causing serogroup B and E strains of Pasteurella multocida in cattle. Front Immunol 2024; 15:1392681. [PMID: 38835751 PMCID: PMC11148319 DOI: 10.3389/fimmu.2024.1392681] [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: 02/27/2024] [Accepted: 04/19/2024] [Indexed: 06/06/2024] Open
Abstract
Background Pasteurella multocida is a bacterial pathogen that causes a variety of infections across diverse animal species, with one of the most devastating associated diseases being hemorrhagic septicemia. Outbreaks of hemorrhagic septicemia in cattle and buffaloes are marked by rapid progression and high mortality. These infections have particularly harmful socio-economic impacts on small holder farmers in Africa and Asia who are heavily reliant on a small number of animals kept as a means of subsistence for milk and draft power purposes. A novel vaccine target, PmSLP-3, has been identified on the surface of hemorrhagic septicemia-associated strains of P. multocida and was previously shown to elicit robust protection in cattle against lethal challenge with a serogroup B strain. Methods Here, we further investigate the protective efficacy of this surface lipoprotein, including evaluating the immunogenicity and protection upon formulation with a variety of adjuvants in both mice and cattle. Results PmSLP-3 formulated with Montanide ISA 61 elicited the highest level of serum and mucosal IgG, elicited long-lasting serum antibodies, and was fully protective against serogroup B challenge. Studies were then performed to identify the minimum number of doses required and the needed protein quantity to maintain protection. Duration studies were performed in cattle, demonstrating sustained serum IgG titres for 3 years after two doses of vaccine and full protection against lethal serogroup B challenge at 7 months after a single vaccine dose. Finally, a serogroup E challenge study was performed, demonstrating that PmSLP-3 vaccine can provide protection against challenge by the two serogroups responsible for hemorrhagic septicemia. Conclusion Together, these data indicate that PmSLP-3 formulated with Montanide ISA 61 is an immunogenic and protective vaccine against hemorrhagic septicemia-causing P. multocida strains in cattle.
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Affiliation(s)
- Jamie E Fegan
- Department of Molecular Genetics, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Regula C Waeckerlin
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Liyuwork Tesfaw
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Epshita A Islam
- Department of Biochemistry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Getaw Deresse
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Dawit Dufera
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Eyob Assefa
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Wubet Woldemedhin
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Abinet Legesse
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Mirtneh Akalu
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Berecha Bayissa
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Quynh Huong Nguyen
- Department of Biochemistry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Dixon Ng
- Department of Biochemistry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Sang Kyun Ahn
- Department of Molecular Genetics, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Anthony B Schryvers
- Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Takele A Tefera
- Department of Veterinary Bacteriology, National Veterinary Institute, Bishoftu/Debre Zeyit, Ethiopia
| | - Trevor F Moraes
- Department of Biochemistry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Scott D Gray-Owen
- Department of Molecular Genetics, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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3
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Apinda N, Yao Y, Zhang Y, Muenthaisong A, Sangkakam K, Nambooppha B, Rittipornlertrak A, Koonyosying P, Nair V, Sthitmatee N. Efficiency of NHEJ-CRISPR/Cas9 and Cre-LoxP Engineered Recombinant Turkey Herpesvirus Expressing Pasteurella multocida OmpH Protein for Fowl Cholera Prevention in Ducks. Vaccines (Basel) 2023; 11:1498. [PMID: 37766174 PMCID: PMC10535566 DOI: 10.3390/vaccines11091498] [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: 08/05/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Fowl cholera is caused by the bacterium Pasteurella multocida, a highly transmissible avian ailment with significant global implications, leading to substantial economic repercussions. The control of fowl cholera outbreaks primarily relies on vaccination using traditional vaccines that are still in use today despite their many limitations. In this research, we describe the development of a genetically engineered herpesvirus of turkeys (HVT) that carries the OmpH gene from P. multocida integrated into UL 45/46 intergenic region using CRISPR/Cas9-NHEJ and Cre-Lox system editing. The integration and expression of the foreign cassettes were confirmed using polymerase chain reaction (PCR), indirect immunofluorescence assays, and Western blot assays. The novel recombinant virus (rHVT-OmpH) demonstrated stable integration of the OmpH gene even after 15 consecutive in vitro passages, along with similar in vitro growth kinetics as the parent HVT virus. The protective efficacy of the rHVT-OmpH vaccine was evaluated in vaccinated ducks by examining the levels of P. multocida OmpH-specific antibodies in serum samples using ELISA. Groups of ducks that received the rHVT-OmpH vaccine or the rOmpH protein with Montanide™ (SEPPIC, Paris, France) adjuvant exhibited high levels of antibodies, in contrast to the negative control groups that received the parental HVT or PBS. The recombinant rHVT-OmpH vaccine also provided complete protection against exposure to virulent P. multocida X-73 seven days post-vaccination. This outcome not only demonstrates that the HVT vector possesses many characteristics of an ideal recombinant viral vaccine vector for protecting non-chicken hosts, such as ducks, but also represents significant research progress in identifying a modern, effective vaccine candidate for combatting ancient infectious diseases.
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Affiliation(s)
- Nisachon Apinda
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
| | - Yongxiu Yao
- The Pirbright Institute, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.N.)
| | - Yaoyao Zhang
- The Pirbright Institute, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.N.)
| | - Anucha Muenthaisong
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
- Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Kanokwan Sangkakam
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
| | - Boondarika Nambooppha
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
| | - Amarin Rittipornlertrak
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
| | - Pongpisid Koonyosying
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
- Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Venugopal Nair
- The Pirbright Institute, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.N.)
- Jenner Institute, University of Oxford, Oxford OX1 2JD, UK
- Department of Biology, University of Oxford, Oxford OX1 3SZ, UK
| | - Nattawooti Sthitmatee
- Laboratory of Veterinary Vaccine and Biological Products, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (N.A.); (A.M.); (K.S.); (B.N.); (A.R.); (P.K.)
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4
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Apinda N, Muenthaisong A, Chomjit P, Sangkakam K, Nambooppha B, Rittipornlertrak A, Koonyosying P, Yao Y, Nair V, Sthitmatee N. Simultaneous Protective Immune Responses of Ducks against Duck Plague and Fowl Cholera by Recombinant Duck Enteritis Virus Vector Expressing Pasteurella multocida OmpH Gene. Vaccines (Basel) 2022; 10:vaccines10081358. [PMID: 36016245 PMCID: PMC9415155 DOI: 10.3390/vaccines10081358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 12/03/2022] Open
Abstract
Duck enteritis virus and Pasteurella multocida are major duck pathogens that induce duck plague and fowl cholera, respectively, in ducks and other waterfowl populations, leading to high levels of morbidity and mortality. Immunization with live attenuated DEV vaccine containing P. multocida outer membrane protein H (OmpH) can provide the most effective protection against these two infectious diseases in ducks. We have recently reported the construction of recombinant DEV expressing P. multocida ompH gene using the CRISPR/Cas9 gene editing strategy with the goal of using it as a bivalent vaccine that can simultaneously protect against both infections. Here we describe the findings of our investigation into the systemic immune responses, potency and clinical protection induced by the two recombinant DEV-ompH vaccine constructs, where one copy each of the ompH gene was inserted into the DEV genome at the UL55-LORF11 and UL44-44.5 intergenic regions, respectively. Our study demonstrated that the insertion of the ompH gene exerted no adverse effect on the DEV parental virus. Moreover, ducklings immunized with the rDEV-ompH-UL55 and rDEV-ompH-UL44 vaccines induced promising levels of P. multocida OmpH-specific as well as DEV-specific antibodies and were completely protected from both diseases. Analysis of the humoral and cellular immunity confirmed the immunogenicity of both recombinant vaccines, which provided strong immune responses against DEV and P. multocida. This study not only provides insights into understanding the immune responses of ducks to recombinant DEV-ompH vaccines but also demonstrates the potential for simultaneous prevention of viral and bacterial infections using viral vectors expressing bacterial immunogens.
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Affiliation(s)
- Nisachon Apinda
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Anucha Muenthaisong
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Paweena Chomjit
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Kanokwan Sangkakam
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Boondarika Nambooppha
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Amarin Rittipornlertrak
- Department of Food Animal Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Pongpisid Koonyosying
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Yongxiu Yao
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK
| | - Venugopal Nair
- The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK
- Jenner Institute, University of Oxford, Oxford OX1 2JD, UK
- Department of Zoology, University of Oxford, 11a Mansfield Road, Oxford OX1 3SZ, UK
| | - Nattawooti Sthitmatee
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
- Excellence Center in Veterinary Bioscience, Chiang Mai University, Chiang Mai 50100, Thailand
- Correspondence: ; Tel.: +66-53-948-017; Fax: +66-53-948-041
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5
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Apinda N, Yao Y, Zhang Y, Reddy VRAP, Chang P, Nair V, Sthitmatee N. CRISPR/Cas9 Editing of Duck Enteritis Virus Genome for the Construction of a Recombinant Vaccine Vector Expressing ompH Gene of Pasteurella multocida in Two Novel Insertion Sites. Vaccines (Basel) 2022; 10:vaccines10050686. [PMID: 35632442 PMCID: PMC9147145 DOI: 10.3390/vaccines10050686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 02/01/2023] Open
Abstract
Duck enteritis virus (DEV) and Pasteurella multocida, the causative agent of duck plague and fowl cholera, are acute contagious diseases and leading causes of morbidity and mortality in duck. The NHEJ-CRISPR/Cas9-mediated gene editing strategy, accompanied with the Cre–Lox system, have been employed in the present study to show that two new sites at UL55-LORF11 and UL44-44.5 loci in the genome of the attenuated Jansen strain of DEV can be used for the stable expression of the outer membrane protein H (ompH) gene of P. multocida that could be used as a bivalent vaccine candidate with the potential of protecting ducks simultaneously against major viral and bacterial pathogens. The two recombinant viruses, DEV-OmpH-V5-UL55-LORF11 and DEV-OmpH-V5-UL44-44.5, with the insertion of ompH-V5 gene at the UL55-LORF11 and UL44-44.5 loci respectively, showed similar growth kinetics and plaque size, compared to the wildtype virus, confirming that the insertion of the foreign gene into these did not have any detrimental effects on DEV. This is the first time the CRISPR/Cas9 system has been applied to insert a highly immunogenic gene from bacteria into the DEV genome rapidly and efficiently. This approach offers an efficient way to introduce other antigens into the DEV genome for multivalent vector.
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Affiliation(s)
- Nisachon Apinda
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Yongxiu Yao
- The Pirbright Institute, Ash Road, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.R.A.P.R.); (P.C.); (V.N.)
| | - Yaoyao Zhang
- The Pirbright Institute, Ash Road, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.R.A.P.R.); (P.C.); (V.N.)
| | | | - Pengxiang Chang
- The Pirbright Institute, Ash Road, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.R.A.P.R.); (P.C.); (V.N.)
| | - Venugopal Nair
- The Pirbright Institute, Ash Road, Woking GU24 0NF, UK; (Y.Y.); (Y.Z.); (V.R.A.P.R.); (P.C.); (V.N.)
- Jenner Institute, University of Oxford, Oxford OX1 2JD, UK
- Department of Zoology, University of Oxford, Oxford OX1 2JD, UK
| | - Nattawooti Sthitmatee
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
- Excellence Center in Veterinary Bioscience, Chiang Mai University, Chiang Mai 50200, Thailand
- Correspondence: ; Tel.: +66-53-948-017; Fax: +66-53-948-041
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Xiao J, Li Y, Hu Z, Zhang Y, Chang YF, Zhou Q, Yan Z, Zhang X, Chen L, Li W, Xie Z, Xie Q. Characterization of Pasteurella multocida isolated from ducks in China from 2017 to 2019. Microb Pathog 2021; 160:105196. [PMID: 34534643 DOI: 10.1016/j.micpath.2021.105196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/11/2021] [Accepted: 09/12/2021] [Indexed: 02/02/2023]
Abstract
Pasteurella multocida, an important gram-negative pathogen that mainly inhibits the upper respiratory tracts of domestic and wild animals such as chicken, duck, cattle and pig, which can cause cholera fowl, haemorrhagic septicaemia and infectious pneumonia. Currently, the prevalence and infection of P.multocida is still one of the most serious threats to the poultry industry in China, but studies on its characteristics are still insufficient. Here, this study was conducted to isolate and identify P.multocida in infected ducks and determined the leading serotypes and epidemiology of the diseases this pathogen causes. Results indicated that all the isolates were positive for KMT1 gene and the PCR amplified products were approximately 460 bp, demonstrating that these strains were all P.multocida. Moreover, all the isolated strains were identified as capsular type A and lipopolysaccharide type L1. Virulence factor identification results revealed that all strains possessed genes related to pili, adhesin, iron metabolism and uptake. In contrast, toxin coding gene (toxA) and sialidase encodes genes (nan B and nan H) were not detected in any isolates. The drug susceptibility results indicated that all the isolates were resistant to Lincomycin, Chloramphenicol, Clindamycin and Oxacillin but were sensitive to Ceftriaxone and Cefalotin. The animal experiments were also performed to further determine the pathogenicity of these isolated strains. Animal experiment revealed that the liver, kidney, and heart of infected ducks were swollen and had bleeding spots. We also observed hepatocyte hypertrophy, hepatic sinus congestion and single-cell infiltration in infected ducks through H&E staining. In summary, this study demonstrated that all the isolated strains belong to capsular A and lipopolysaccharide type L1 P.multocida, but their virulence factors, drug resistance and pathogenicity were different.
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Affiliation(s)
- Junfang Xiao
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Yajuan Li
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zezhong Hu
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Yukun Zhang
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Yung-Fu Chang
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Qingfeng Zhou
- Research Institute, Wen's Food Group Co., LTD, Yunfu, China
| | - Zhuanqiang Yan
- Research Institute, Wen's Food Group Co., LTD, Yunfu, China
| | - Xinheng Zhang
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Liyi Chen
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Wenxue Li
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zi Xie
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Qingmei Xie
- College of Animal Science, South China Agricultural University, Guangzhou, China.
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7
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Li N, Feng T, Wang Y, Li P, Yin Y, Zhao Z, Hardwidge PR, Peng Y, He F. A single point mutation in the hyaC gene affects Pasteurella multocida serovar A capsule production and virulence. Microb Pathog 2021; 159:105145. [PMID: 34411653 DOI: 10.1016/j.micpath.2021.105145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 08/03/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022]
Abstract
Pasteurella multocida (P. multocida) is a Gram-negative bacterium which causes diseases in poultry, livestock, and humans, resulting in huge economic losses. P. multocida serovar A CQ6 (PmCQ6) is a naturally occurring attenuated strain with a thin capsule. Thus, we aimed to explore why this strain is less virulent and produces less capsule compared with P. multocida serovar A strain CQ2 (PmCQ2). Analysis of capsular polysaccharide synthesis genes in PmCQ6 revealed that, compared with PmCQ2, there was only a single point mutation in the initiation codon sequence of the hyaC gene. To test whether this point mutation caused capsular deficiency and reduced virulence, we rescued this hyaC mutation and observed a restoration of capsule production and higher virulence. Transcriptome analysis showed that the hyaC point mutation led to a downregulation of capsule synthesis and/or iron utilization related-genes. Taken together, the results indicate that the start codon mutation of hyaC is an important factor affecting the capsule synthesis and virulence of PmCQ6.
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Affiliation(s)
- Nengzhang Li
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Teng Feng
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Yuanlan Wang
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Pan Li
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Yuanyuan Yin
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Zongling Zhao
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China
| | - Philip R Hardwidge
- College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Yuanyi Peng
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China.
| | - Fang He
- College of Veterinary Medicine, Southwest University, Chongqing, 400715, China.
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Muenthaisong A, Rittipornlertrak A, Nambooppha B, Tankaew P, Varinrak T, Pumpuang M, Muangthai K, Atthikanyaphak K, Singhla T, Pringproa K, Punyapornwithaya V, Sawada T, Sthitmatee N. Immune response in dairy cattle against combined foot and mouth disease and haemorrhagic septicemia vaccine under field conditions. BMC Vet Res 2021; 17:186. [PMID: 33952269 PMCID: PMC8097834 DOI: 10.1186/s12917-021-02889-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 04/22/2021] [Indexed: 11/10/2022] Open
Abstract
Background Foot-and-mouth disease (FMD) and Haemorrhagic septicemia (HS) are two important diseases that are known to have caused significant economic losses to the cattle industry. Accordingly, vaccinations have been recognized as an efficient method to control and prevent both of the above-mentioned diseases. This study aimed to determine the immune response to FMD virus antigens and the recombinant outer membrane protein of HS (rOmpH) of Pasteurella multocida in cattle administered as a combination vaccine and compare antibody titers with the two vaccines given independently, under field conditions. Dairy cattle were divided into three groups. Each group was immunized with different vaccine types according to the vaccination program employed in this study. Antibody responses were determined by indirect ELISA, liquid phase blocking ELISA (LPB-ELISA) and viral neutralization test (VNT). Furthermore, the cellular immune responses were measured by lymphocyte proliferation assay (LPA). Results The overall antibody titers to HS and FMDV were above cut-off values for the combined FMD-HS vaccine in this study.The mean antibody titer against HS after the first immunization in the combined FMD-HS vaccine groups was higher than in the HS vaccine groups. However, no statistically significant differences (p > 0.05) were observed between groups. Likewise, the antibody titer to the FMDV serotypes O/TAI/189/87 and Asia 1/TAI/85 determined by LPB-ELISA in the combined vaccine were not statistically significantly different when compared to the FMD vaccine groups. However, the mean VNT antibody titer of combined vaccine against serotype O was significantly higher than the VN titer of FMD vaccine groups (p < 0.05). Moreover, the LPA results showed that all vaccinated groups displayed significantly higher than the negative control (p < 0.05). Nevertheless, no differences in the lymphocyte responses were observed in comparisons between the groups (p > 0.05). Conclusions The combined FMD-HS vaccine formulated in this study could result in high both antibody and cellular immune responses without antigenic competition. Therefore, the combined FMD-HS vaccine can serve as an alternative vaccine against both HS and FMD in dairy cattle under field conditions.
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Affiliation(s)
- Anucha Muenthaisong
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Amarin Rittipornlertrak
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Boondarika Nambooppha
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Pallop Tankaew
- Central Laboratory, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Thanya Varinrak
- Central Laboratory, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Marutpong Pumpuang
- Bureau of Veterinary Biologics, Department of Livestock Developments, Ministry of Agriculture and Cooperative, 30130, Nakhon Ratchasima, Thailand
| | - Korkiat Muangthai
- Bureau of Veterinary Biologics, Department of Livestock Developments, Ministry of Agriculture and Cooperative, 30130, Nakhon Ratchasima, Thailand
| | - Kheemchompu Atthikanyaphak
- Bureau of Veterinary Biologics, Department of Livestock Developments, Ministry of Agriculture and Cooperative, 30130, Nakhon Ratchasima, Thailand
| | - Tawatchai Singhla
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Kidsadagon Pringproa
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Veerasak Punyapornwithaya
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Takuo Sawada
- Laboratory of Veterinary Microbiology, Nippon Veterinary and Life Science University, 180-8602, Musashino, Tokyo, Japan
| | - Nattawooti Sthitmatee
- Department of Veterinary Bioscience and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand. .,Excellence Center in Veterinary Bioscience, Chiang Mai University, 50100, Chiang Mai, Thailand.
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