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Alshammari A, Marzok M, Gattan HS, Salem M, Al-Jabr OA, Selim A. Serosurvey and associated risk factors for Neospora caninum infection in Egyptian water buffaloes (Bubalus bubalis). Sci Rep 2023; 13:22788. [PMID: 38123811 PMCID: PMC10733272 DOI: 10.1038/s41598-023-50087-3] [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: 05/27/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023] Open
Abstract
Neosporosis is a parasitic disease that causes reproductive disorders in animals, making it a barrier to maximum efficiency. The purpose of this study was to determine the seroprevalence of Neospora caninum (N. caninum) antibodies in water buffaloes from four governorates in northern Egypt. A commercial indirect-ELISA test was used to detect antibodies against N. caninum in the serum of 450 water buffaloes. The total seroprevalence of N. caninum in water buffaloes from Egypt was 31.3%, and the highest prevalence was observed in Gharbia governorate. The identified risk factors for N. caninum infections in water buffaloes were sex (OR = 1.96, 95%CI: 1.22-4.17), buffaloes more than 4 years of age ( OR = 5.80, 95%CI: 2.26-14.86), abortion in second trimester (OR = 16.48, 95%%CI: 2.99-34.03), history of abortion (OR = 3.45, 95%CI: 1.58-7.52) and contact with dogs (OR = 2.55, 95%CI: 1.51-4.32). Thus, more studies are needed to determine the role of buffaloes in the epidemiology of neosporosis in Egypt.
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Affiliation(s)
- Ayed Alshammari
- Department of Biology, College of Science, University of Hafr Al-Batin, Hafr Al-Batin, Saudi Arabia
| | - Mohamed Marzok
- Department of Clinical Sciences, College of Veterinary Medicine, King Faisal University, 31982, Al-Ahsa, Saudi Arabia.
- Department of Surgery, Faculty of Veterinary Medicine, Kafr El Sheikh University, Kafr El Sheikh, Egypt.
| | - Hattan S Gattan
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Special Infectious Agents Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah, Saudi Arabia
| | - Mohamed Salem
- Department of Clinical Sciences, College of Veterinary Medicine, King Faisal University, 31982, Al-Ahsa, Saudi Arabia
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Cairo, 12613, Egypt
| | - Omar A Al-Jabr
- Department of Microbiology, College of Veterinary Medicine, King Faisal University, P.O. Box 400, 31982, Al-Ahsa, Saudi Arabia
| | - Abdelfattah Selim
- Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Benha University, Toukh, 13736, Egypt.
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Huang M, Yin Y, Shi K, Zhang H, Cao X, Song X. Neospora caninum seroprevalence in water buffaloes in Guangxi, China. Anim Biotechnol 2023; 34:3274-3279. [PMID: 36165738 DOI: 10.1080/10495398.2022.2126369] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Neospora caninum is an important obligate intracellular apicomplexan parasite that causes spontaneous abortions in cattle and leads to huge economic losses to the farming industry. Although a high prevalence of N. caninum infection has been reported in Asia, data on the prevalence of water buffaloes in China remain unclear. To understand the seroprevalence of N. caninum infection in water buffaloes and its definitive host dogs in China, a total of 987 water buffalo sera from Guangxi Province were tested using an indirect enzyme-linked immunosorbent assay. We obtained an overall seroprevalence of 50.9% (502/987) for water buffalo samples. And the positive rate was higher in border cities (56.8%, 425/748) than in central cities (32.3%, 77/239). We further tested 240 serum samples from dogs in Guangxi and found an overall prevalence of 57.9% (139/240). The high prevalence of N. caninum infection in both dogs and water buffaloes was first reported in southern China, and these data will surely contribute to the prevention and control of the disease.
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Affiliation(s)
- Mao Huang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Yanwen Yin
- Guangxi Center for Animal Disease Control and Prevention, Nanning, China
| | - Kaichuang Shi
- Guangxi Center for Animal Disease Control and Prevention, Nanning, China
| | - Hongtao Zhang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Xinru Cao
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Xingju Song
- College of Animal Science and Technology, Guangxi University, Nanning, China
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Systematic Review and Meta-analysis of Role of Felids as Intermediate Hosts in the Life Cycle of Neospora caninum Based on Serological Data. Acta Parasitol 2023; 68:266-276. [PMID: 36710305 DOI: 10.1007/s11686-023-00661-6] [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: 07/21/2022] [Accepted: 01/04/2023] [Indexed: 01/31/2023]
Abstract
PURPOSE Neosporosis is an important widespread parasitic infection caused by N. caninum. It infects a wide range of warm-blooded animals as intermediate hosts and dogs as the definitive host. Nevertheless, there are a number of questions regarding the life cycle and epidemiological aspects of N. caninum. Also, the role of felids (domestic and non-domestic) in the life cycle of N. caninum has been little described. Therefore, this study was conducted to evaluate the global prevalence of N. caninum in domestic and wild felids. METHODS PubMed, Scopus, Google Scholar, Web of Science, and ScienceDirect databases were searched for articles published on the prevalence of N. caninum in felids until Aprill 2, 2022 and the reference lists of retrieved articles were screened. A random-effects meta-analysis model was used to estimate the pooled prevalence and 95% confidence interval. Heterogeneity among studies was evaluated using Cochran's Q and the I2 statistic. RESULTS After exclusion of irrelevant articles and duplication removal, 30 studies were eligible for quantitative analysis including 20 studies on domestic cats and 10 studies on wild felids. The overall prevalence of neosporosis infection in cats was 15% (95% CI 10-21%) that was significantly higher in wild felids (26%, 95% CI 13-38%) than in domestic cats (11%, 95% CI 6-16%) (P = 0.03). There was no significant difference in pooled prevalence between male and female domestic cats (P = 0.75). Regarding continent, the lowest prevalence of neosporosis infection was in Asia (9%, 95% CI 1-20%) and the highest was in North America (43.6%, 95% CI 33.9-53.2%) and Africa (18%, 95% CI 9-46%). Higher prevalence was obtained when using the NAT with 22% (95% CI 7-37%), compared to the IFAT (17%, 95% CI 9-24%) and ELISA (6%, 95% CI 2-9%) (P = 0.01). CONCLUSION The findings highlighted the importance of felids as potential intermediate hosts of neosporosis despite the fact that the source of the parasite for these animals was unknown. Further studies should be performed to investigate the role of this top predator (felids) in maintaining both domestic and sylvatic cycles of Neospora caninum.
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Cao H, Zheng WB, Wang Y, Gao WW, Liu Q, Zhu XQ, Lei YP, Tumen B, Song HY. Seroprevalence of Neospora caninum infection and associated risk factors in cattle in Shanxi Province, north China. Front Vet Sci 2022; 9:1053270. [PMID: 36524222 PMCID: PMC9744922 DOI: 10.3389/fvets.2022.1053270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 11/14/2022] [Indexed: 10/26/2023] Open
Abstract
Neospora caninum is an obligate intracellular parasitic protozoan that can cause abortions in cattle and pose considerable economic losses to the cattle industry. As a major livestock province, little is known of N. caninum infection in cattle in Shanxi Province, north China. In order to investigate the seroprevalence of N. caninum in cattle in Shanxi Province, 978 cattle serum samples were collected from 11 cities in three representative geographical locations in Shanxi Province, and the N. caninum-specific IgG antibodies were examined using an indirect enzyme linked immunosorbent assay (ELISA) kit commercially available. The results showed that 133 of the 978 examined cattle serum samples (13.60%, 95% CI = 11.45-15.75) were positive for N. caninum antibodies, and the seroprevalence in different cities ranged from 0 to 78.89%. The geographical location and management mode were the risk factors associated with N. caninum infection in cattle herds in Shanxi Province. Cattle in Northern and Central Shanxi Province as well as cattle whose management mode is that of large-scale cattle farming companies are more susceptible to N. caninum infection. This was the first large-scale survey of N. caninum seroprevalence and assessment of associated risk factors in cattle in Shanxi Province, which provided baseline information for the prevention and control of N. caninum infection in cattle in Shanxi Province, north China.
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Affiliation(s)
- Hui Cao
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
| | - Wen-Bin Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
| | - Yu Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
| | - Wen-Wei Gao
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
| | - Qing Liu
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
| | - Xing-Quan Zhu
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
- Key Laboratory of Veterinary Public Health of Higher Education of Yunnan Province, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Yu-Ping Lei
- Veterinary Laboratory, Shanxi Provincial Animal Disease Prevention and Control Center, Taiyuan, China
| | - Bayaer Tumen
- Veterinary Laboratory, Shanxi Provincial Animal Disease Prevention and Control Center, Taiyuan, China
| | - Hong-Yu Song
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, China
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Prevalence of Neospora caninum, Toxoplasma gondii and Brucella abortus in water buffalo (Bubalus bubalis): Climatic and environmental risk factors in eastern and southeast Mexico. Microb Pathog 2022; 173:105871. [DOI: 10.1016/j.micpath.2022.105871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/07/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022]
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Towards the First Multiepitope Vaccine Candidate against Neospora caninum in Mouse Model: Immunoinformatic Standpoint. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2644667. [PMID: 35722460 PMCID: PMC9204498 DOI: 10.1155/2022/2644667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 05/09/2022] [Indexed: 11/28/2022]
Abstract
Neospora caninum is an economically significant parasite among livestock, particularly in dairy cattle herds, causing storm abortions. Vaccination seems necessary to limit the infection and its harsh consequences. This is the first steps towards developing a multiepitope vaccine candidate against N. caninum using in silico approaches. High-ranked mouse MHC-binding and shared linear B-cell epitopes from six proteins (SRS2, MIC3, MIC6, GRA1, IMP-1, and profilin) as well as IFN-γ-inducing epitopes (from SAG1) were predicted, screened, and connected together through appropriate linkers. Finally, RS-09 protein (TLR4 agonist) and histidine tag were added to N- and C-terminal of the vaccine sequence, yielding 486 residues in length. Physicochemical properties showed a stable (instability index: 27.23), highly soluble, antigenic (VaxiJen score: 0.9554), and nonallergenic candidate. Secondary structure of the multiepitope protein included 58.85% random coil, 20.99% extended strand, and 20.16% alpha helix. Also, the tertiary structure was predicted, and further analyses validated a stable interaction between the vaccine model and mouse TLR4 (binding score: -1261.6). Virtual simulation of immune profile demonstrated potently stimulated humoral (IgG+IgM) and cell-mediated (IFN-γ) responses upon multiepitope vaccine injection. Altogether, a potentially immunogenic vaccine candidate was developed using several N. caninum proteins, with the capability to elicit IFN-γ upsurge and other components of cellular immunity, and can be used in prophylactic purposes against neosporosis.
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Determination of B and T Cell Epitopes in Neospora caninum Immune Mapped Protein-1 (IMP-1): Implications in Vaccine Design against Neosporosis. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2508050. [PMID: 35434130 PMCID: PMC9010208 DOI: 10.1155/2022/2508050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 01/15/2022] [Accepted: 03/10/2022] [Indexed: 02/05/2023]
Abstract
Prevention of neosporosis is advantageous for cattle health and productivity. Previously, several vaccine candidates were nominated for vaccination against Neospora caninum. This study was premised on in silico evaluation of N. caninum IMP-1 in order to determine its physicochemical features and immunogenic epitopes. We employed a wide array of network-based tools for the prediction of antigenicity, allergenicity, solubility, posttranslational modification (PTM) sites, physicochemical properties, transmembrane domains and signal peptide, secondary and tertiary structures, and intrinsically disordered regions. Also, prediction and screening of potential continuous B cell peptides and those epitopes having stringent affinity to couple with mouse major histocompatibility complex (MHC) and cytotoxic T lymphocyte (CTL) receptors were accomplished. The protein had 393 residues with a molecular weight of 42.71 kDa, representing aliphatic index of 85.83 (thermotolerant) and GRAVY score of -0.447 (hydrophilic). There were 47 PTM sites without a signal peptide in the sequence. Secondary structure comprised mostly of extended strand and helices, followed by coils. The Ramachandran plot of the refined model showed 90.1%, 9.9%, 0.0%, and 0.0% residues in the favored, additional allowed, generously allowed, and disallowed regions, correspondingly. Additionally, various potential B cell (linear and conformational), CTL, and MHC binding epitopes were predicted for N. caninum IMP-1. The findings of the present study could be further directed for next-generation vaccine design against neosporosis.
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Neospora caninum SRS2 Protein: Essential Vaccination Targets and Biochemical Features for Next-Generation Vaccine Design. BIOMED RESEARCH INTERNATIONAL 2022; 2022:7070144. [PMID: 35434127 PMCID: PMC9007667 DOI: 10.1155/2022/7070144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 03/23/2022] [Indexed: 11/17/2022]
Abstract
Vaccination is a standout preventive measure to combat neosporosis among cattle herds. The present in silico study was done to evaluate the physicochemical properties and potent immunogenic epitopes of N. caninum SRS2 protein as a possible vaccine candidate. Web-based tools were used to predict physicochemical properties, antigenicity, allergenicity, solubility, posttranslational modification (PTM) sites, transmembrane domains and signal peptide, and secondary and tertiary structures as well as intrinsically disordered regions, followed by identification and screening of potential linear and conformational B-cell epitopes and those peptides having affinity to bind mouse major histocompatibility complex (MHC) and cytotoxic T lymphocyte (CTL). The protein had 401 residues with a molecular weight of 42 kDa, representing aliphatic index of 69.35 (thermotolerant) and GRAVY score of -0.294 (hydrophilic). There were 53 PTM sites without a signal peptide in the sequence. Secondary structure comprised mostly by extended strand, followed by helices and coils. The Ramachandran plot of the refined model showed 90.2%, 8.8%, 0.5%, and 0.5% residues in the favored, additional allowed, generously allowed, and disallowed regions, correspondingly. Additionally, various potential B-cell (linear and conformational), CTL, and MHC-binding epitopes were predicted for N. caninum SRS2. These epitopes could be further utilized in the multiepitope vaccine constructs directed against neosporosis.
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Rodrigues AA, Brito DRB, Kono IS, Reis SS, Nino BDSL, Nascimento TVC, Barros LDD, Garcia JL, Cunha IALD. Seroprevalence of Neospora caninum and risk factors associated with infection in water buffaloes (Bubalus bubalis) from Maranhão State, Brazil. Vet Parasitol Reg Stud Reports 2022; 27:100661. [PMID: 35012718 DOI: 10.1016/j.vprsr.2021.100661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 06/14/2023]
Abstract
The aim of this work was to determine the seroprevalence of Neospora caninum in buffaloes (Bubalus bubalis) from Maranhão State, Brazil, and identify risk factors associated with infection. In total, 338 buffaloes of different ages and both sexes from four farms were randomly selected. Information about the study region, animals and management was collected using an epidemiological questionnaire. Sera were subjected to an indirect fluorescent antibody test (IFAT) to detect anti-N caninum antibodies, while N. caninum DNA was detected using the polymerase chain reaction (PCR) assays. The overall seroprevalence of N. caninum in buffaloes was 27.5% (93/338), while DNA was detected in 3.0% (3/101) samples. The proportion of positive animals detected by IFAT and PCR simultaneously was 2.6% (2/77). The risk factors for N. caninum infection were contact with fomites (p = 0.022), management conditions (p = 0.005), calving interval of 20 months (p = 0.010) and deworming management (application 3 times a year in adults and calves, p = 0.020; change of anthelmintic group, p = 0.040). By multivariate analysis, management conditions was a risk factor for N. caninum infection with odds ratio of 2.2 (95% CI 1.0-4.6). This is the first report of the prevalence and risk factors for neosporosis in B. bubalis of Maranhão State, Brazil. Thus, N. caninum is widely distributed in buffalo herds in Maranhão, with management conditions being a risk factor for infection. Further studies should be conducted to elucidate the importance of buffaloes in the epidemiology of neosporosis in Maranhão State.
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Affiliation(s)
- Arlan Araujo Rodrigues
- Applied Parasitology Laboratory, Agricultural and Environmental Sciences Center, Federal University of Maranhão, MA-230, KM 04, s/n° - Boa Vista, 65500-000 Chapadinha, Maranhão, Brazil
| | - Danilo Rodrigues Barros Brito
- Laboratory of Animal Health, Federal Institute of Maranhão, Campus São Luís-Maracanã, Avenida dos Curiós, s/n° - Vila Esperança, 65095-460 São Luis, Maranhão, Brazil
| | - Isabelli Sayuri Kono
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, State University of Londrina, Rodovia Celso Garcia Cid, Jardim Portal de Versalhes 1, 86057-970 Londrina, Paraná, Brazil
| | - Sara Silva Reis
- Applied Parasitology Laboratory, Agricultural and Environmental Sciences Center, Federal University of Maranhão, MA-230, KM 04, s/n° - Boa Vista, 65500-000 Chapadinha, Maranhão, Brazil
| | - Beatriz de Souza Lima Nino
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, State University of Londrina, Rodovia Celso Garcia Cid, Jardim Portal de Versalhes 1, 86057-970 Londrina, Paraná, Brazil
| | - Thiago Vinícius Costa Nascimento
- Applied Parasitology Laboratory, Agricultural and Environmental Sciences Center, Federal University of Maranhão, MA-230, KM 04, s/n° - Boa Vista, 65500-000 Chapadinha, Maranhão, Brazil
| | - Luiz Daniel de Barros
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, State University of Londrina, Rodovia Celso Garcia Cid, Jardim Portal de Versalhes 1, 86057-970 Londrina, Paraná, Brazil
| | - João Luis Garcia
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, State University of Londrina, Rodovia Celso Garcia Cid, Jardim Portal de Versalhes 1, 86057-970 Londrina, Paraná, Brazil
| | - Ivo Alexandre Leme da Cunha
- Applied Parasitology Laboratory, Agricultural and Environmental Sciences Center, Federal University of Maranhão, MA-230, KM 04, s/n° - Boa Vista, 65500-000 Chapadinha, Maranhão, Brazil.
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Salguero-Romero JL, Romero-Salas D, Cruz-Romero A, Alonso-Díaz MA, Aguilar-Domínguez M, Sánchez-Montes S, Lammoglia-Villagómez MA, Chaparro-Gutiérrez JJ, Nogueira-Domingues L, Pérez-de León AA, Dubey JP. Serosurveillance and risk factors for Neospora caninum infection in water buffaloes (B. bubalis) from central and southern Mexico. Vet Parasitol Reg Stud Reports 2021; 26:100631. [PMID: 34879942 DOI: 10.1016/j.vprsr.2021.100631] [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: 07/02/2020] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022]
Abstract
The water buffalo (B. bubalis) is an alternative to cattle ranching in several regions of southern Mexico. Here we report seroprevalence and risk factors associated with the protozoan parasite, Neospora caninum, in water buffaloes in six buffalo production units, in municipalities from central and southern Veracruz, Mexico. Antibodies to N. caninum were assessed in serum samples of 543 buffaloes by a commercial ELISA-kit, and 44.8% (243/543; 95% CI 40.5-49.0) were seropositive. Questionnaires were used to collect epidemiological data and to identify risk factors associated with N. caninum infection. Data analysis indicated that older buffaloes (≥7 year) exhibited the highest seroprevalence for neosporosis 62.3% (38/61; 95% CI 49.7-73.4) (P ≤ 0.05). Buffaloes that were in close contact with cattle had higher seroprevalence 47.6% (168/353; 95% CI 42.3-52.9) (P < 0.01) than those that were not in contact 36.8% (70/190; 95% CI 30.0-44.1). Our findings provide important information to implement preventive measures in the buffalo farms.
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Affiliation(s)
- José Luis Salguero-Romero
- Parasitology Laboratory. Research Group UV-CA-430 "Zoonosis and Epidemiological Surveillance", Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana. Circunvalación y Yañez s/n. Unidad Veracruzana, CP. 91710, Veracruz, Mexico
| | - Dora Romero-Salas
- Parasitology Laboratory. Research Group UV-CA-430 "Zoonosis and Epidemiological Surveillance", Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana. Circunvalación y Yañez s/n. Unidad Veracruzana, CP. 91710, Veracruz, Mexico.
| | - Anabel Cruz-Romero
- Parasitology Laboratory. Research Group UV-CA-430 "Zoonosis and Epidemiological Surveillance", Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana. Circunvalación y Yañez s/n. Unidad Veracruzana, CP. 91710, Veracruz, Mexico
| | - Miguel A Alonso-Díaz
- CEIEGT, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Km. 5.5 Carr. Fed. Martínez de la Torre-Tlapacoyan. Tlapacoyan, Veracruz CP. 9360, Mexico
| | - Mariel Aguilar-Domínguez
- Parasitology Laboratory. Research Group UV-CA-430 "Zoonosis and Epidemiological Surveillance", Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana. Circunvalación y Yañez s/n. Unidad Veracruzana, CP. 91710, Veracruz, Mexico
| | - Sokani Sánchez-Montes
- Facultad de Ciencias Biológicas y Agropecuarias región Tuxpan, Universidad Veracruzana. Carr. Tuxpan-Tampico Kilómetro, Veracruz CP. 92870, Mexico; Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Miguel A Lammoglia-Villagómez
- Facultad de Ciencias Biológicas y Agropecuarias región Tuxpan, Universidad Veracruzana. Carr. Tuxpan-Tampico Kilómetro, Veracruz CP. 92870, Mexico
| | - Jenny J Chaparro-Gutiérrez
- Grupo de Investigación CIBAV, Facultad de Ciencias Agrarias, Universidad de Antioquia, UdeA, Medellín, Colombia
| | - Luisa Nogueira-Domingues
- United States Department of Agriculture, Agricultural Research Service, Knipling-Bushland U.S. Livestock Insects Research Laboratory, and Veterinary Pest Genomics Center, 2700 Fredericksburg Road, Kerrville, TX 78028, USA
| | - Adalberto A Pérez-de León
- United States Department of Agriculture, Agricultural Research Service, Knipling-Bushland U.S. Livestock Insects Research Laboratory, and Veterinary Pest Genomics Center, 2700 Fredericksburg Road, Kerrville, TX 78028, USA
| | - J P Dubey
- United States Department of Agriculture, Agricultural Research Service. Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, MD 20705-2350, USA
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Gharekhani J, Yakhchali M, Heidari R. Molecular detection and phylogenetic analysis of Neospora caninum in various hosts from Iran. Comp Immunol Microbiol Infect Dis 2021; 80:101737. [PMID: 34915205 DOI: 10.1016/j.cimid.2021.101737] [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: 10/13/2021] [Revised: 11/28/2021] [Accepted: 12/03/2021] [Indexed: 12/01/2022]
Abstract
Different N. caninum strains with distinct biological characteristics and pathogenicity have been introduced from various areas of the world. This study aimed to detect Neospora-infection in different hosts from Iran using the nested-Polymerase Chain Reaction (PCR) technique and to perform the phylogenetic analysis of N. caninum isolates using the Nc-5 gene. Different species of parasite hosts (cattle, dogs, rodents, cats, and birds) from the dairy farms with history of abortion with intensive breeding systems in Hamedan Province, Iran were included for sampling. The stillbirth fetuses of cattle, sheep, and goats were also collected from the slaughterhouse. The nested-PCR technique was used to identify the Neospora-DNA in the aborted fetal materials. The PCR products of the positive samples were sequenced and compared with other isolates in GenBank. Antibodies to N. caninum was found in 19.1% of dogs. Also, 11.4% of dogs were positive for Neospora-like oocysts using microscopy method. The molecular prevalence of N. caninum was 10.6% in dogs, 13.6% in cattle, 35.4% in the aborted fetuses of cows, 31.9% in rodents, 7.6% in pigeons, 1.9% in sparrows, 5.1% in cats, and 7% in the semen sample of bulls. A sampled coyote was positive while the stillbirth fetuses of sheep and goats were negative. The multiple sequence alignments indicated that 34 sequences of N. caninum bore a 94.9-99.3% similarity to each other. Hence, these sequences were classified into two major clusters (clusters A and B) and seven sub-groups (isolates 1-7). The sequence of coyote had a high similarity to the sequences derived from dogs and cows. Also, root diagram showed the isolates of current study and previous reported from Iran have a similar origin. This study provided a phylogenetic analysis of Neospora-infection in different hosts, and for the first time, explored Neospora-infection in coyotes from Iran. Different isolates were detected in the studied population in the region. Comparison of the sequences showed the farm dogs play an important role in the life cycle and distribution of the parasite; so the relationship of dogs with the herd and their access to aborted materials should be restricted. Also, regular control of rodents' population and culling of seropositive cows with a history of abortion is essential for cutting the chain of transmission.
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Affiliation(s)
- Jamal Gharekhani
- Department of Laboratory Sciences, Central Veterinary Laboratory, Iranian Veterinary Organization (IVO), Hamedan, Iran; Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
| | - Mohammad Yakhchali
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Reza Heidari
- Department of Human Genetics and Advanced Technologies, Faculty of Medicine, AJA University of Medicine Sciences, Tehran, Iran
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Olmo L, Reichel MP, Windsor PA, Suon S, Wahl LC, Thomson PC, Bush RD. Are infectious reproductive pathogens of large ruminants a threat to improving food security? An investigation from Cambodia. Trop Anim Health Prod 2021; 53:480. [PMID: 34561731 DOI: 10.1007/s11250-021-02897-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
In Cambodia, information on common pathogens causing reproductive losses in cattle and buffalo are lacking, despite there being a need to address livestock health to enhance food security. We analysed stored buffalo (n = 29) and cattle (n = 471) serum samples collected in 2016 using commercially available enzyme-linked immunosorbent assay kits. Antibodies to Neospora caninum, bovine viral diarrhoea virus (BVDV), Leptospira interrogans serovar Hardjo and Brucella abortus were detected in buffalo samples at 79.3% (95% CI 64.6-94.0), 3.4% (95% CI 0-10.0), 0% and 0%, respectively, and in cattle at 4.2% (95% CI 2.4-6.0), 6.4% (95% CI 4.2-8.6), 8.1% (95% CI 5.6-10.6) and 0%, respectively. The high N. caninum seroprevalence in buffalo was associated with increasing age, with buffalo having a 13.1% chance of being seropositive at birth, increasing to 99.4% by age 7 (p = 0.045). This suggests a predominance of horizontal transmission, possibly from exposure to faeces from free-roaming village dogs. Cattle L. interrogans serovar Hardjo seroprevalence was highest in Tbong Khmum province (20.4%) compared to other provinces (p < 0.001), and may be compromising bovine fertility and creating a zoonotic risk for smallholders who may contract leptospirosis from farm work. These high infection rates prompt further research to determine: to what extent these pathogens are linked to the low reproductive efficiency observed in large ruminants in Cambodia, the risk factors to pathogen exposure and appropriate strategies to reduce these risks. Low BVDV and B. abortus exposure is an important observation. Increasing large ruminant livestock trade into the country will require improved biosecurity and disease surveillance to prevent their emergence. An enhanced understanding of the status of infectious reproductive livestock pathogens in Cambodia can assist development projects to make evidence-based strategies to enhance cattle and buffalo health and improve food security.
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Affiliation(s)
- Luisa Olmo
- The University of Sydney, Sydney School of Veterinary Science, 425 Werombi Road, Camden, NSW, 2570, Australia.
| | - Michael Philipp Reichel
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Peter Andrew Windsor
- The University of Sydney, Sydney School of Veterinary Science, 425 Werombi Road, Camden, NSW, 2570, Australia
| | - Sothoeun Suon
- General Directorate of Animal Health and Production, Ministry of Agriculture, Forestry and Fisheries, Phnom Penh, Cambodia
| | - Lloyd Christian Wahl
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Peter Campbell Thomson
- School of Life and Environmental Sciences, The University of Sydney, Camden, NSW, 2570, Australia
| | - Russell David Bush
- The University of Sydney, Sydney School of Veterinary Science, 425 Werombi Road, Camden, NSW, 2570, Australia
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Shedding light on biochemical features and potential immunogenic epitopes of Neospora caninum SAG1: In silico study. INFORMATICS IN MEDICINE UNLOCKED 2021. [DOI: 10.1016/j.imu.2021.100785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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14
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Gharekhani J, Yakhchali M, Berahmat R. Neospora caninum infection in Iran (2004-2020): A review. J Parasit Dis 2020; 44:671-686. [PMID: 32929312 PMCID: PMC7481549 DOI: 10.1007/s12639-020-01266-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 08/28/2020] [Indexed: 01/28/2023] Open
Abstract
Knowledge on neosporosis and associated risk factors in different species of animals are so important for designing the control programs and reduce the economic losses globally. This literature review targeted for evaluating the infection rate of Neospora caninum in animals in Iran. Until April 2020, all of published documents in the main English and Persian-language databases were searched. A total number of 110 documents (English = 85 and Persian = 25) were extracted. Most of reports were sero-epidemiological studies using ELISA in Iranian cattle population. The range of Neospora infection was 3.8–76.2% in cattle, 0–54.6% in dogs, 0.9–9.9% in sheep, 6.2% in goats, 19.2–55.9% in buffaloes, 20–42.2% in horses, 52% in donkeys, 3.2–27% in camels, 14% and 19% in cats, and 0–20.4% in rodents. This rate in birds was 17.3% in chicken, 9.8% and 30.4% in pigeons, 2.8% and 3.7% in sparrows, and 9.9% in hooded crows. This is a comprehensive literature review on Neospora infection in Iran at the first time. The infection of N. caninum is widespread in Iran especially in dogs and cattle population. This review can provide baseline information for future research. Study on other hosts especially on wild and exotic animals is recommended for exact estimate of neosporosis in Iran. Investigations into molecular diagnosis and genotyping of N. caninum strains are also needed; this will be helpful for developing vaccines and finding the connection among wild and domestic cycles of disease. Education on the risk factors associated with N. caninum infection for is suggested farmers and rural public.
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Affiliation(s)
- Jamal Gharekhani
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.,Department of Laboratory Sciences, Central Veterinary Laboratory, Iranian Veterinary Organization, Hamedan Veterinary Office, Ayatollah-Rafsanjani Street, Hamedan, 6519611156 Iran
| | - Mohammad Yakhchali
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Reza Berahmat
- Department of Parasitology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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15
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de Barros LD, Garcia JL, Bresciani KDS, Cardim ST, Storte VS, Headley SA. A Review of Toxoplasmosis and Neosporosis in Water Buffalo ( Bubalus bubalis). Front Vet Sci 2020; 7:455. [PMID: 32851033 PMCID: PMC7431459 DOI: 10.3389/fvets.2020.00455] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/22/2020] [Indexed: 12/19/2022] Open
Abstract
Toxoplasmosis and neosporosis are diseases with worldwide distribution that are associated with reproductive problems in livestock and responsible for economic losses. This review presents an overview of the current knowledge relative to these diseases in water buffalo (Bubalus bubalis). In general, buffalo are considered resistant to clinical toxoplasmosis because there are studies only reporting serological evidence of natural infection in these animals. Studies have described age, poor hygienic status of the farm, and presence of cats as risk factors for the development of Toxoplasma gondii infection in buffalo. It must be highlighted that buffalo meat, which does not receive adequate freezing treatment, could be a potential source for toxoplasmic human infection as well as the importance of raw buffalo milk in the transmission of toxoplasmosis to human beings. Neospora caninum is considered one of the major causes of abortion and responsible for huge economic losses in cattle. Vertical transmission is the main route to infect calves, and is responsible for maintaining the parasite within a herd. In buffalo, vertical transmission is also described; moreover, although there are indications that N. caninum may be associated with abortion in dairy buffalo, the reproductive importance of neosporosis is apparently lower in buffalo relative to cattle. Most studies have identified a higher time of exposition to N. caninum oocysts relative to age. The household system was also described as a risk factor for infection, possibly due to persistent contact between the home-raised buffalo and canids. The fetal immune competence of buffalo is similar to bovine, and buffalo fetus are highly susceptible to infection during the first trimester of pregnancy, indicating that N. caninum may be an abortigenic agent in buffaloes. Alternatively, it is interesting to note there is evidence that the inflammatory response in pregnant buffalo infected with N. caninum is mild enough to avoid abortion in most cases. It is proposed that the possible transmission of toxoplasmosis through unprocessed milk and buffalo meat may occur, which is important in terms of public health. Additionally, there is strong evidence to suggest that N. caninum may be associated with abortion in buffalo.
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Affiliation(s)
- Luiz Daniel de Barros
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, Universidade Estadual de Londrina, Londrina, Brazil
| | - João Luis Garcia
- Laboratory of Animal Protozoology, Department of Preventive Veterinary Medicine, Universidade Estadual de Londrina, Londrina, Brazil
| | | | - Sérgio Tosi Cardim
- Department of Veterinary Medicine, Universidade Norte Do Paraná, Arapongas, Brazil
| | - Victor Sesnik Storte
- Department of Veterinary Medicine, Universidade Norte Do Paraná, Arapongas, Brazil
| | - Selwyn Arlington Headley
- Laboratory of Animal Pathology, Department of Preventive Veterinary Medicine, Universidade Estadual de Londrina, Londrina, Brazil
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16
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Reichel MP, Wahl LC, Ellis JT. Research into Neospora caninum-What Have We Learnt in the Last Thirty Years? Pathogens 2020; 9:E505. [PMID: 32585955 PMCID: PMC7350369 DOI: 10.3390/pathogens9060505] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/20/2020] [Accepted: 06/21/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Neospora caninum has been recognised world-wide, first as a disease of dogs, then as an important cause of abortions in cattle for the past thirty years. Over that time period, there have been improvements in the diagnosis of infection and abortion, new tests have been developed and validated, and it is timely to review progress to date. METHODS Bibliometric methods were used to identify major trends and research topics present in the published literature on N. caninum. The tools used were SWIFT-Review, VOSviewer and SciMAT, along with the published papers found in the MEDLINE, Dimensions and Web of Science databases. A systematic review of the published Neospora literature (n = 2933) was also carried out via MEDLINE and systematically appraised for publications relevant to the pathogenesis, pathology and diagnosis of Neospora abortions. RESULTS A total of 92 publications were included in the final analysis and grouped into four main time periods. In these four different time periods, the main research themes were "dogs", "abortion", "seroprevalence" and "infection". Diagnostics, including PCR, dominated the first two time periods, with an increased focus on transmission and abortions, and its risk factors in cattle. CONCLUSIONS Longitudinal analyses indicated that the main themes were consistently investigated over the last 30 years through a wide range of studies, with evolving emphasis initially on dogs and diagnostic test development, followed by application to cattle, the identification of the risk factors leading to abortion, and in the latter time periods, an understanding of the immunity and a search for vaccines.
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Affiliation(s)
- Michael P. Reichel
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China;
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853-6401, USA
| | - Lloyd C. Wahl
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China;
| | - John T. Ellis
- School of Life Sciences, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia;
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17
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Seroprevalence and Clinical Outcomes of Neospora caninum, Toxoplasma gondii and Besnoitia besnoiti Infections in Water Buffaloes ( Bubalus bubalis). Animals (Basel) 2020; 10:ani10030532. [PMID: 32235734 PMCID: PMC7142529 DOI: 10.3390/ani10030532] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 01/10/2023] Open
Abstract
One hundred twenty-four water buffaloes (Bubalus bubalis) originating from 9 farms located in southern Italy were tested to investigate simultaneously, for the first time, the seroprevalence of the protozoa Neospora caninum, Toxoplasma gondii and Besnoitia besnoiti by ELISA tests and to evaluate the clinical findings potentially associated to the presence of these aborting parasitic pathogens. Twenty-five of 124 buffaloes (20.2%) were positive for N. caninum, while 17/124 (13.7%) for T. gondii. No buffalo showed specific antibodies for B. besnoiti. Nineteen of 124 animals (15.3%) were found seropositive for both T. gondii and N. caninum. The univariate statistical analysis showed that the seroprevalence of N. caninum is significantly associated with abortion and presence of retained foetal membranes, while the seroprevalence of T. gondii is significantly associated with an increase of days open. The logistic regression models showed that the co-infection by N. caninum and T. gondii strengthened the abortive effects (OR = 7.330) and showed further negative effects on the parameter embryonic death (OR = 2.607). The outcome revealed herein represents a high exposure of N. caninum and T. gondii in water buffaloes with reproduction disorders that deserves attention for both economic reasons, animal health and welfare.
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18
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Adesiyun AA, Knobel DL, Thompson PN, Wentzel J, Kolo FB, Kolo AO, Conan A, Simpson GJG. Sero-Epidemiological Study of Selected Zoonotic and Abortifacient Pathogens in Cattle at a Wildlife-Livestock Interface in South Africa. Vector Borne Zoonotic Dis 2019; 20:258-267. [PMID: 31841655 DOI: 10.1089/vbz.2019.2519] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A cross sectional sero-epidemiological study was conducted on cattle in a communal farming area adjacent to Kruger National Park at a wildlife-livestock interface in South Africa. A total of 184 cattle were screened for exposure to 5 abortifacient or zoonotic pathogens, namely Coxiella burnetii, Toxoplasma gondii, Chlamydophila abortus, Neospora caninum, and Rift Valley fever virus (RVFV) using enzyme-linked immunosorbent assays. In addition, the virus neutralization test was used to confirm the presence of antibodies to RVFV. The seroprevalence of C. burnetii, T. gondii, C. abortus, N. caninum, and RVFV antibodies was 38.0%, 32.6%, 20.7%, 1.6%, and 0.5%, respectively, and varied between locations (p < 0.001). Seroprevalence of C. burnetii and T. gondii was highly clustered by location (intraclass correlation coefficient [ICC] = 0.57), and that of C. abortus moderately so (ICC = 0.11). Seroprevalence was not associated with sex or age for any pathogen, except for C. abortus, for which seroprevalence was positively associated with age (p = 0.01). The predominant mixed infections were C. burnetii and T. gondii (15.2%) and C. burnetii, T. gondii, and C. abortus (13.0%). The serological detection of the five abortifacient pathogens in cattle indicates the potential for economic losses to livestock farmers, health impacts to domestic animals, transmission across the livestock-wildlife interface, and the risk of zoonotic transmission. This is the first documentation of T. gondii infection in cattle in South Africa, while exposure to C. burnetii, C. abortus, and N. caninum infections is being reported for the first time in cattle in a wildlife-livestock interface in the country.
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Affiliation(s)
- Abiodun A Adesiyun
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.,Department of Basic Veterinary Sciences, Faculty of Medical Sciences, University of the West Indies, St Augustine, Trinidad and Tobago
| | - Darryn L Knobel
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.,Center for Conservation Medicine and Ecosystem Health, Ross University School of Veterinary Medicine, Basseterre, St. Kitts and Nevis
| | - Peter N Thompson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.,Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Jeanette Wentzel
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.,Hans Hoheisen Wildlife Research Station, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Francis B Kolo
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Agatha O Kolo
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Anne Conan
- Center for Conservation Medicine and Ecosystem Health, Ross University School of Veterinary Medicine, Basseterre, St. Kitts and Nevis
| | - Gregory J G Simpson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.,Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
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19
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Olmo L, Reichel MP, Nampanya S, Khounsy S, Wahl LC, Clark BA, Thomson PC, Windsor PA, Bush RD. Risk factors for Neospora caninum, bovine viral diarrhoea virus, and Leptospira interrogans serovar Hardjo infection in smallholder cattle and buffalo in Lao PDR. PLoS One 2019; 14:e0220335. [PMID: 31393897 PMCID: PMC6687104 DOI: 10.1371/journal.pone.0220335] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/12/2019] [Indexed: 11/18/2022] Open
Abstract
Smallholder large ruminant production in Lao People's Democratic Republic (Laos) is characterised by low reproductive efficiency. To determine if common abortifacient bovid infectious diseases are involved, a serological investigation was conducted. Sera was collected from stored and fresh cattle (n = 390) and buffalo (n = 130) samples from 2016-18 from, and then examined for associations in a retrospective risk factor study of 71 herds. The sera were assayed for antibodies to Neospora caninum, bovine viral diarrhoea virus (BVDV), Leptospira interrogans serovar Hardjo and Brucella abortus using commercially available enzyme-linked immunosorbent assay kits. These pathogens were detected in buffalo samples at 78.5% (95% CI 71.4-85.6), 0%, 2.3% (95% CI 0-4.9) and 0%, respectively, and in cattle at 4.4% (95% CI 2.4-6.4), 7.7% (95% CI 3.1-12.3), 12.8% (95% CI 9.5-16.1) and 0.26% (95% CI 0-0.8), respectively. Exposure of buffalo to N. caninum was positively associated with buffalo age, with a predicted seropositivity at birth of 52.8%, increasing to 97.2% by 12 years of age (p = 0.037). Exposure of cattle to L. interrogans serovar Hardjo was more prevalent in females compared to males, was associated with higher titres of BVDV, and was more prevalent in the wet season compared to the dry season. Exposure of cattle to BVDV was more prevalent in males compared to females, the wet and dry seasons were comparable, and was associated with rising antibody titres against N. caninum and L. interrogans serovar Hardjo. The risk factor survey identified that the probability of herds being N. caninum positive increased with farmer age, if farmers believed there were rodents on farm, and if farmers weren't aware that canids or rodents could contaminate bovid feed on their farm. The probability of a herd being positive to L. interrogans serovar Hardjo increased on farms where multiple cows shared the same bull, where farmers had lower husbandry knowledge, and on farms that used water troughs. The probability of a herd being BVDV seropositive increased with increasing herd size and increasing titres to N. caninum. The benchmarking of bovid exposure to emerging abortifacient pathogens and identification of their risk factors potentially informs disease prevention strategies, supporting efforts to establish a biosecure beef supply for enhanced smallholder livestock productivity, public health and food security in Laos and surrounding countries.
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Affiliation(s)
- Luisa Olmo
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
| | - Michael P Reichel
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Sonevilay Nampanya
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia.,Department of Livestock and Fisheries, Ministry of Agriculture and Forestry, Vientiane, Lao PDR
| | - Syseng Khounsy
- Department of Livestock and Fisheries, Ministry of Agriculture and Forestry, Vientiane, Lao PDR
| | - Lloyd C Wahl
- Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Bethanie A Clark
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
| | - Peter C Thomson
- School of Life and Environmental Sciences, The University of Sydney, Camden, NSW, Australia
| | - Peter A Windsor
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
| | - Russell D Bush
- Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
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20
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Toll-Like Receptor 3-TRIF Pathway Activation by Neospora caninum RNA Enhances Infection Control in Mice. Infect Immun 2019; 87:IAI.00739-18. [PMID: 30670552 DOI: 10.1128/iai.00739-18] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 01/05/2019] [Indexed: 12/11/2022] Open
Abstract
Neospora caninum is a protozoan parasite closely related to Toxoplasma gondii and has been studied for causing neuromuscular disease in dogs and abortions in cattle. It is recognized as one of the main transmissible causes of reproductive failure in cattle and consequent economic losses to the sector. In that sense, this study aimed to evaluate the role of Toll-like receptor 3 (TLR3)-TRIF-dependent resistance against N. caninum infection in mice. We observed that TLR3-/- and TRIF-/- mice presented higher parasite burdens, increased inflammatory lesions, and reduced production of interleukin 12p40 (IL-12p40), tumor necrosis factor (TNF), gamma interferon (IFN-γ), and nitric oxide (NO). Unlike those of T. gondii, N. caninum tachyzoites and RNA recruited TLR3 to the parasitophorous vacuole (PV) and translocated interferon response factor 3 (IRF3) to the nucleus. We also observed that N. caninum upregulated the expression of TRIF in murine macrophages, which in turn upregulated IFN-α and IFN-β in the presence of the parasite. Furthermore, TRIF-/- infected macrophages produced lower levels of IL-12p40, while exogenous IFN-α replacement was able to completely restore the production of this key cytokine. Our results show that the TLR3-TRIF signaling pathway enhances resistance against N. caninum infection in mice, since it improves Th1 immune responses that result in controlled parasitism and reduced tissue inflammation, which are hallmarks of the disease.
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21
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Oliveira PRFD, Soares LBF, Borges JDM, Mota RA, Pinheiro Junior JW. Prevalence and associated factors with Neospora caninum infection in female water buffaloes (Bubalus bubalis) from Pernambuco, Brazil. ACTA ACUST UNITED AC 2018; 27:439-445. [PMID: 30427520 DOI: 10.1590/s1984-296120180063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/06/2018] [Indexed: 11/21/2022]
Abstract
Neosporosis is one of the major parasitic diseases that causes reproductive problems, making it a limitation for optimal efficiency in livestock. The aim of the present study was to conduct a seroepidemiological survey for bubaline neosporosis and to analyse associated factors associated with N. caninum infection in female water buffaloes in the State of Pernambuco, northeast Brazil. The prevalence of N. caninum infection in the bubaline herds examined was 35.4% (122/345; 95% CI: 30.4%-40.7%), at least 1 Neospora-positive animal was found in each farm. Associated factors for N. caninum infection identified in this study were exclusive pasture feeding (OR: 5.91, p <0.001) and purchase of animals of free fair and from reputable sellers (OR: 1.85; p =0.045). In this survey, we document the occurrence of neosporosis in female water buffaloes. Associated factors should be controlled in order to reduce the risk of N. caninum infection in these herds.
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Affiliation(s)
- Pollyanne Raysa Fernandes de Oliveira
- Laboratório de Bacterioses dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco - UFRPE, Recife, PE, Brasil
| | - Larice Bruna Ferreira Soares
- Laboratório de Bacterioses dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco - UFRPE, Recife, PE, Brasil
| | - Jonas de Melo Borges
- Laboratório de Bacterioses dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco - UFRPE, Recife, PE, Brasil
| | - Rinaldo Aparecido Mota
- Laboratório de Bacterioses dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco - UFRPE, Recife, PE, Brasil
| | - José Wilton Pinheiro Junior
- Laboratório de Bacterioses dos Animais Domésticos, Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco - UFRPE, Recife, PE, Brasil
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22
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Mazuz ML, Alvarez-García G, King R, Savisky I, Shkap V, Ortega-Mora LM, Gutiérrez-Expósito D. Exposure to Neospora spp. and Besnoitia spp. in wildlife from Israel. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2018; 7:317-321. [PMID: 30175044 PMCID: PMC6115540 DOI: 10.1016/j.ijppaw.2018.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/27/2018] [Accepted: 08/17/2018] [Indexed: 11/27/2022]
Abstract
Neosporosis and besnoitiosis, caused by cyst-forming protozoa Neospora caninum and Besnoitia besnoiti, respectively, are parasitic infestations of livestock in Israel. These parasites cause significant economic losses in cattle due to reproductive and productive disorders. Both parasites have been detected in several wild ruminant species throughout other regions of the world, while the existence of a sylvatic life cycle in Israel remains uncertain. Thus, a wide panel of 871 sera from two wild carnivores and nine wild ruminant species were tested. All sera were first analysed by MAT for an initial screening and positive samples were confirmed a posteriori by Western blot. Additionally, a complementary IFAT was used for the detection of antibodies against N. caninum. Neospora antibodies were present in six out of the 11 species investigated, whereas Besnoitia antibodies were undetected. Golden jackal, red fox, addax, Arabian oryx, Persian fallow deer, mouflon, mountain gazelle, Nubian ibex, scimitar horned oryx and water buffalo were seropositive against N. caninum infection by IFAT and/or MAT. Moreover, the presence of Neospora spp.-specific antibodies was confirmed by Western blot in golden jackal (6/189; 3.2%), red fox (1/75; 1.3%), Persian fallow deer (13/232; 5.6%), mouflon (1/15; 16.7%), Nubian ibex (22/55; 40%) and water buffalo (12/18; 66.7%). Addax (1/49) and water buffalo (1/18) were MAT-seropositive against B. besnoiti but were seronegative by Western blot. Hence, Neospora sylvatic cycle is present in Israel and may cross over to a domestic life cycle. In contrast, wildlife species investigated are unlikely to present a risk of transmitting Besnoitia to livestock in Israel.
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Affiliation(s)
- Monica L Mazuz
- Parasitology Division, Kimron Veterinary Institute, PO Box 12, Bet Dagan, 50250, Israel
| | - Gema Alvarez-García
- SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Roni King
- Science Division, Israel Nature & Parks Authority, 3 Am Ve´Olamo St, Jerusalem, 9546303, Israel
| | - Igor Savisky
- Parasitology Division, Kimron Veterinary Institute, PO Box 12, Bet Dagan, 50250, Israel
| | - Varda Shkap
- Parasitology Division, Kimron Veterinary Institute, PO Box 12, Bet Dagan, 50250, Israel
| | - Luis M Ortega-Mora
- SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Daniel Gutiérrez-Expósito
- SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
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Sala JM, Trotta MV, Mansilla FC, Pérez-Filgueira M, Caspe SG, Capozzo AV. Alternatives for the serological assessment of foot-and-mouth disease vaccine immunity in buffaloes ( Bubalus bubalis). JOURNAL OF APPLIED ANIMAL RESEARCH 2018. [DOI: 10.1080/09712119.2017.1335641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Juan Manuel Sala
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria de Mercedes, Corrientes, Argentina
| | - Myrian Vanesa Trotta
- Instituto Nacional de Tecnología Agropecuaria, Instituto de Virología, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Hurlingham, Argentina
| | - Florencia Celeste Mansilla
- Instituto Nacional de Tecnología Agropecuaria, Instituto de Virología, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Hurlingham, Argentina
| | - Mariano Pérez-Filgueira
- Instituto Nacional de Tecnología Agropecuaria, Instituto de Virología, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Hurlingham, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas, Buenos Aires, Argentina
| | - Sergio Gastón Caspe
- Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria de Mercedes, Corrientes, Argentina
| | - Alejandra Victoria Capozzo
- Instituto Nacional de Tecnología Agropecuaria, Instituto de Virología, Centro de Investigaciones en Ciencias Veterinarias y Agronómicas, Hurlingham, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas, Buenos Aires, Argentina
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Olmo L, Dye M, Reichel M, Young J, Nampanya S, Khounsy S, Thomson P, Windsor P, Bush R. Investigation of infectious reproductive pathogens of large ruminants: Are neosporosis, brucellosis, leptospirosis and BVDV of relevance in Lao PDR? Acta Trop 2018; 177:118-126. [PMID: 29024616 DOI: 10.1016/j.actatropica.2017.10.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 09/25/2017] [Accepted: 10/07/2017] [Indexed: 10/18/2022]
Abstract
N. caninum, bovine viral diarrhoea virus, Brucella abortus and Leptospira interrogans serovar Hardjo are globally significant reproductive pathogens that cause abortion and reproductive loss in large ruminants. Prevalence information is lacking in Lao People's Democratic Republic (Laos) despite the poor reproductive performance of cattle and buffalo. Serological examination of frozen cattle (n=90) and buffalo (n=61) sera by commercially available enzyme-linked immunosorbent assays provided the first reported screening of some of these pathogens in Laos. Seroprevalence differed amongst these large ruminant species, with N. caninum, BVDV and L. interrogans serovar Hardjo antibodies found in 68.9% (95% CI±11.6), 4.9% (95% CI±5.4) and 3.3% (95% CI±4.5) of buffalo sera, respectively, and in 7.8% (95% CI±5.5), 10.0% (95% CI±6.2) and 22.2% (95% CI±8.6) of cattle sera, respectively. Buffalo sera had a significantly higher seroprevalence of N. caninum compared to cattle (p<0.001) and cattle sera had a significantly higher seroprevalence of L. interrogans serovar Hardjo compared to buffalo (p=0.003). Variability was also observed across provinces for N. caninum in buffalo (p=0.007) and for L. interrogans serovar Hardjo in cattle (p=0.071), suggesting provincial risk factors conducive to pathogen transmission. BVDV and N. caninum seropositivity were negatively associated in buffalo (p=0.018) and cattle (p=0.003). In buffalo, L. interrogans serovar Hardjo and BVDV seropositivity were associated (p=0.035, p=0.039). The identification of antibodies against three major abortifacient pathogens in Laos prompts further research to determine if infection is associated with low reproductive efficiency and the risk factors for infection. This is needed for the development of evidence based prevention strategies for improved large ruminant reproductive management among smallholders in Laos.
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McAllister MM. Diagnosis and Control of Bovine Neosporosis. Vet Clin North Am Food Anim Pract 2016; 32:443-63. [DOI: 10.1016/j.cvfa.2016.01.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Silva RC, Machado GP. Canine neosporosis: perspectives on pathogenesis and management. VETERINARY MEDICINE-RESEARCH AND REPORTS 2016; 7:59-70. [PMID: 30050838 PMCID: PMC6055790 DOI: 10.2147/vmrr.s76969] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Canine neosporosis is a worldwide disease caused by the obligate intracellular parasite protozoan Neospora caninum, manifesting mainly neurological symptoms. N. caninum has a heteroxenous life cycle and affects a wide range of warm-blooded animals. The domestic and wild canids are the definitive host of the parasite. They shed oocysts after ingestion of tissue cysts from infected intermediate hosts (ovine, equine, bovine, canine, and many other species), containing bradyzoites, or oocyst-contaminated water and food. The presence of dogs in farms is considered a risk factor for production animals. A wide range of diagnostic methods are currently available, but the most used is serology, ie, indirect fluorescent antibody test specific to the antibody detection in blood serum samples. No vaccine is available, but control strategies should be focused on the vertical and horizontal transmission of the parasite, ie, avoid feeding dogs with raw or undercooked meat, and taking care with water for human and animal consumption. No medicines to control the transplacental transmission are available yet.
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Affiliation(s)
- Rodrigo C Silva
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Starkville, MS, USA,
| | - Gustavo P Machado
- Department of Internal Medicine and Surgery of Small Animals, Dr Munhoz Veterinary Hospital, Itápolis, Brazil
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