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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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2
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Campero LM, Basso W, Moré G, Fiorani F, Hecker YP, Echaide I, Cantón GJ, Cirone KM, Campero CM, Venturini MC, Moore DP. Neosporosis in Argentina: Past, present and future perspectives. Vet Parasitol Reg Stud Reports 2023; 41:100882. [PMID: 37208088 DOI: 10.1016/j.vprsr.2023.100882] [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: 03/28/2023] [Accepted: 04/20/2023] [Indexed: 05/21/2023]
Abstract
Neosporosis, caused by the protozoan Neospora caninum, was first diagnosed in Argentinean cattle in the 90's. With a national bovine stock of approximately 53 million head, the cattle industry is socially and economically relevant. Severe economic losses have been estimated at US$ 33 and 12 million annually in dairy and beef cattle, respectively. Approximately 9% of bovine abortions in the Buenos Aires province are caused by N. caninum. In 2001, the first isolation of N. caninum oocysts from feces of a naturally infected dog was performed in Argentina and named as NC-6 Argentina. Further strains were isolated from cattle (NC-Argentina LP1, NC-Argentina LP2) and axis deer (Axis axis, NC-Axis). Epidemiological studies revealed a high distribution of Neospora-infections not only in dairy but also in beef cattle, with seroprevalence rates of 16.6-88.8% and 0-73%, respectively. Several experimental infection studies in cattle have been carried out, as well as attempts to develop effective vaccines to avoid Neospora-abortions and transmission. However, no vaccine has proven successful for its use in daily practice. Reduction of seroprevalence, vertical transmission and Neospora-related abortions have been achieved in dairy farms by the use of selective breeding strategies and embryo transfer. Neospora-infections have been also detected in goats, sheep, deer, water buffaloes (Bubalus bubalis) and gray foxes (Lycalopex griseus). Moreover, Neospora-related reproductive losses were reported in small ruminants and deer species and could be more frequent than previously thought. Even though diagnostic methods have been improved during the last decades, control of neosporosis is still not optimal. The development of new strategies including new antiprotozoal drugs and vaccines is highly needed. This paper reviews the information from the previous 28 years of research of N. caninum in Argentina, including seroprevalence and epidemiological studies, available diagnostic techniques, experimental reproduction, immunization strategies, isolations and control measures in domestic and non-domestic animals from Argentina.
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Affiliation(s)
- L M Campero
- National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, C1033AAJ Buenos Aires, Argentina; Institute of Innovation for Agricultural Production and Sustainable Development (IPADS Balcarce), Ruta 226, km 73.5, 7620 Balcarce, Argentina
| | - W Basso
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, CH-3012 Bern, Switzerland
| | - G Moré
- National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, C1033AAJ Buenos Aires, Argentina; Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, CH-3012 Bern, Switzerland
| | - F Fiorani
- National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, C1033AAJ Buenos Aires, Argentina; Institute of Innovation for Agricultural Production and Sustainable Development (IPADS Balcarce), Ruta 226, km 73.5, 7620 Balcarce, Argentina; Faculty of Agrarian Sciences, National University of Mar del Plata (UNMdP), Ruta 226, km 73.5, 7620 Balcarce, Argentina
| | - Y P Hecker
- National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, C1033AAJ Buenos Aires, Argentina; Institute of Innovation for Agricultural Production and Sustainable Development (IPADS Balcarce), Ruta 226, km 73.5, 7620 Balcarce, Argentina; SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, 28040 Madrid, Spain
| | - I Echaide
- National Institute of Agricultural Technology, INTA E.E.A, Rafaela, Argentina
| | - G J Cantón
- National Institute of Agricultural Technology, INTA E.E.A Balcarce, Ruta 226, km 73.5, 7620 Balcarce, Argentina
| | - K M Cirone
- Faculty of Agrarian Sciences, National University of Mar del Plata (UNMdP), Ruta 226, km 73.5, 7620 Balcarce, Argentina; National Institute of Agricultural Technology, INTA E.E.A Balcarce, Ruta 226, km 73.5, 7620 Balcarce, Argentina
| | - C M Campero
- National Institute of Agricultural Technology, INTA E.E.A Balcarce, Ruta 226, km 73.5, 7620 Balcarce, Argentina
| | - M C Venturini
- Immunoparasitology Laboratory, Veterinary Sciences Faculty, National University of La Plata, 60 and 118 s/n, 1900 La Plata, Argentina
| | - D P Moore
- National Scientific and Technical Research Council (CONICET), Godoy Cruz, 2290, C1033AAJ Buenos Aires, Argentina; Institute of Innovation for Agricultural Production and Sustainable Development (IPADS Balcarce), Ruta 226, km 73.5, 7620 Balcarce, Argentina; Faculty of Agrarian Sciences, National University of Mar del Plata (UNMdP), Ruta 226, km 73.5, 7620 Balcarce, Argentina.
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3
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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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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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Rezvan H, Khaki A, Namavari M, Abedizadeh R. An investigation of the concurrency of anti- Neospora antibody and parasitemia in water buffalo ( Bubalus bubalis) in northwest of Iran. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2019; 10:79-84. [PMID: 31183020 PMCID: PMC6522196 DOI: 10.30466/vrf.2019.34314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/24/2018] [Indexed: 01/26/2023]
Abstract
Neospora caninum is an obligate intracellular parasite causing abortion and reproductive failure in ruminants. Here, the seroprevalence of Neospora DNA and anti-Neospora antibodies and the correlation between the DNA and the antibody using polymerase chain reaction (PCR) and a new developed whole cell-based enzyme-linked immunosorbent assay (ELISA) in water buffalo (Bubalus bubalis) were investigated. To determine the level of anti-Neospora antibody, 83 serum samples were collected from buffaloes in the northwest of Iran. Plates were coated with 2 × 106 whole Neospora tachyzoites and the anti-Neospora antibody level was determined by calculating the ratio of sample/positive control (S/P) optical densities (ODs) in the ELISA. All samples with the ration of 0.50 or above were accounted as positive. To confirm the presence of Neospora DNA, the serum samples were directly subjected to PCR and nested PCR for detection of Neospora NC5 gene without the DNA isolation process. A total number of 83 buffalo serum samples were examined for the presence of anti-N. caninum immunoglobulin G and Neospora DNA. All samples with the S/P ratio of 0.50 or above (16 samples, 19.27%) were also positive for Neospora DNA. All samples with OD less than 0.50 (34 samples, 40.96%) were negative for Neospora DNA. However, 33 samples with the S/P ratio of bellow 0.50 (39.75%) showed a significant level of antibody. A 100% correlation was observed between high levels of the anti-Neospora antibody and Neospora DNA in the serum of water buffalo, and the whole N. caninum tachyzoites have the potency to be used as antigens for detection of the parasite in ELISA.
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Affiliation(s)
- Hossein Rezvan
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamadan, Iran
| | - Amir Khaki
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Amol University of Special Modern Technologies, Amol, Iran
| | | | - Roya Abedizadeh
- PhD Candidate, Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamadan, Iran
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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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Romero-Salas D, Alvarado-Esquivel C, Domínguez-Aguilar G, Cruz-Romero A, Ibarra-Priego N, Barrientos-Salcedo C, Aguilar-Domínguez M, Canseco-Sedano R, Espín-Iturbe LT, Sánchez-Anguiano LF, Hernández-Tinoco J, de León AAP. Seroepidemiology of Infection with Neospora Caninum, Leptospira, and Bovine Herpesvirus Type 1 in Water Buffaloes (Bubalus Bubalis) in Veracruz, Mexico. Eur J Microbiol Immunol (Bp) 2017; 7:278-283. [PMID: 29403656 PMCID: PMC5793697 DOI: 10.1556/1886.2017.00029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/07/2017] [Indexed: 11/21/2022] Open
Abstract
We aimed to determine the seroprevalence of infection with Neospora caninum, Leptospira, and bovine herpesvirus type 1 and risk factors associated with these infections in water buffaloes in Veracruz State, Mexico. Through a cross-sectional study, 144 water buffaloes (Bubalus bubalis) raised in 5 ranches of Veracruz were examined for anti-N. caninum and anti-bovine herpesvirus type 1 antibodies by enzyme immunoassays, and anti-Leptospira interrogans antibodies by microscopic agglutination test. Of the 144 buffaloes studied, 35 (24.3%) were positive for N. caninum, 50 (34.7%) for Leptospira, and 83 (57.6%) for bovine herpes virus. The frequencies of leptospiral serovars in buffaloes were as follows: 18.7% for Muenchen (n = 27), 10.4% for Hardjo LT (n = 15), 9.0% for Pyrogenes (n = 13), and 4.8% for Icterohaemorrhagiae (n = 7). Seropositive buffaloes were found in all 5 ranches studied. Logistic regression showed that cohabitation of buffaloes with cows was associated with infection with Leptospira (odds ratio [OR], 2.2; 95% confidence interval [CI], 1.04–4.5; P = 0.03) and bovine herpesvirus (OR, 12.0; 95% CI, 4.0–36.2; P < 0.01). This is the first study that provides serological evidence of N. caninum, Leptospira, and bovine herpesvirus type 1 infections in water buffaloes in Mexico. Our findings could be used to enhance preventive measures against these infections.
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Affiliation(s)
- Dora Romero-Salas
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Cosme Alvarado-Esquivel
- Laboratorio de Investigación Biomédica, Facultad de Medicina y Nutrición, Universidad Juárez del Estado de Durango, Avenida Universidad S/N, 34000 Durango, México
| | - Gladys Domínguez-Aguilar
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Anabel Cruz-Romero
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Nelly Ibarra-Priego
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Carolina Barrientos-Salcedo
- Laboratorio de Química Médica y Quimiogenómica, Facultad de Bioanálisis Región Veracruz, Agustín de Iturbide Esq. Carmen Serdán S/N, Col. Centro, C.P. 91700 México
| | - Mariel Aguilar-Domínguez
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Rodolfo Canseco-Sedano
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Luz Teresa Espín-Iturbe
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Veracruzana, Circunvalación y Yáñez S/N, C.P. 91710, Veracruz, México
| | - Luis Francisco Sánchez-Anguiano
- Instituto de Investigación Científica "Dr. Roberto Rivera Damm", Universidad Juárez del Estado de Durango, Avenida Universidad S/N, 34000 Durango, México
| | - Jesús Hernández-Tinoco
- Instituto de Investigación Científica "Dr. Roberto Rivera Damm", Universidad Juárez del Estado de Durango, Avenida Universidad S/N, 34000 Durango, México
| | - Adalberto A Pérez de León
- US Department of Agriculture - Agricultural Research Service, Knipling-Bushland U.S. Livestock Insects Research Laboratory, and Veterinary Pest Genomics Center, Kerrville, Texas, 78028, USA
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da Silva JB, Nicolino RR, Fagundes GM, Dos Anjos Bomjardim H, Dos Santos Belo Reis A, da Silva Lima DH, Oliveira CMC, Barbosa JD, da Fonseca AH. Serological survey of Neospora caninum and Toxoplasma gondii in cattle (Bos indicus) and water buffaloes (Bubalus bubalis) in ten provinces of Brazil. Comp Immunol Microbiol Infect Dis 2017; 52:30-35. [PMID: 28673459 DOI: 10.1016/j.cimid.2017.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 05/04/2017] [Accepted: 05/08/2017] [Indexed: 10/19/2022]
Abstract
The objective of this study was to determine the prevalence of antibodies to Neospora caninum and Toxoplasma gondii among 500 cattle (Bos indicus) and 500 buffaloes (Bubalus bubalis) using the indirect fluorescent antibody test (IFAT) technique. Blood samples from were collected from water buffalo and cattle in 10 municipalities in the northern region of Brazil. The frequency of cattle and water buffaloes seropositive for Neospora caninum in Pará state, Brazil, was 55% and 44%, respectively, and the frequency of cattle and water buffaloes seropositive for Toxoplasma gondii was 52% and 39%, respectively. Seropositivity for both N. caninum and T. gondii was detected in 10.6% of the cattle samples and 14.8% of the buffalo samples. The frequency of cattle positive for N. caninum and T. gondii was significantly (p<0.05) higher than that of buffalo in two and three provinces, respectively. Buffaloes had a lower seroprevalence for N. caninum or T. gondii in all of the provinces studied. These results suggest that both species, when exposed to the same risks for N. caninum and T. gondii infection, have a high serological prevalence. Cattle showed a higher probability of being seropositive when exposed to the same risks for N. caninum and T. gondii. Our study, which included an extensive number of blood samples, provides important epidemiological information pertinent to buffalo production in tropical countries that can be used as a basis for disease-management practices in Latin America.
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Affiliation(s)
- Jenevaldo Barbosa da Silva
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - ICA/UFVJM, Av. João Narciso, 1380-Cachoeira, 38610-000 Unaí, Minas Gerais, Brazil.
| | - Rafael Romero Nicolino
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - ICA/UFVJM, Av. João Narciso, 1380-Cachoeira, 38610-000 Unaí, Minas Gerais, Brazil
| | - Gisele Maria Fagundes
- Universidade de São Paulo - USP, Av. Duque de Caxias Norte, 225, 13635-900 Pirassununga, São Paulo, Brazil
| | - Henrique Dos Anjos Bomjardim
- Universidade Federal do Pará - UFPA, Rodovia BR 316 Km 61, Bairro Saudade, 68740-970, Castanhal, Pará, Brazil(1)
| | | | | | - Carlos Magno Chaves Oliveira
- Universidade Federal do Pará - UFPA, Rodovia BR 316 Km 61, Bairro Saudade, 68740-970, Castanhal, Pará, Brazil(1)
| | - José Diomedes Barbosa
- Universidade Federal do Pará - UFPA, Rodovia BR 316 Km 61, Bairro Saudade, 68740-970, Castanhal, Pará, Brazil(1)
| | - Adivaldo Henrique da Fonseca
- Universidade Federal Rural do Rio de Janeiro - UFRRJ, Br 465, Km 07, 23890-000 Seropédica, Rio de Janeiro, Brazil
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Portella LP, Cadore GC, Lima MD, Sangioni LA, Fischer G, Vogel FS. Antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii detected in buffaloes from Rio Grande do Sul, Brazil. PESQUISA VETERINARIA BRASILEIRA 2016. [DOI: 10.1590/s0100-736x2016001000005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT: The presence of antibodies against Neospora caninum, Sarcocystis spp. and Toxoplasma gondii was evaluated in buffaloes (Bubalus bubalis) from Rio Grande do Sul state (RS), southern Brazil. Serum samples (n=220) were analyzed for antibodies by indirect fluorescent antibody test (IFAT). Antibody presence was considered when the titers were equal or higher than 100 for these protozoa. A total of 60.5% (133/220) buffalo serum samples were positive for at least one of the protozoa evaluated in this study. Antibodies for N. caninum, Sarcocystis spp. and T. gondii were found in 36.4% (80/220), 25.5% (56/220) and 16.8% (37/220) of the buffaloes respectively, indicating a higher frequency of N. caninum infection (p=0.0133). The IFAT is a suitable method to diagnose N. caninum, Sarcocystis spp. and T. gondii infection in buffaloes for detecting IgG antibodies. This study demonstrates the presence of these three protozoa in buffalo herds in RS, Brazil, which may be source of infection to other animals. The high frequency of animals positive for N. caninum is important and could be related to reproductive problems. Additionally, the presence of Sarcocystis spp. and T. gondii in buffaloes can be a possible public health issue.
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Reichel MP, McAllister MM, Nasir A, Moore DP. A review of Neospora caninum in water buffalo (Bubalus bubalis). Vet Parasitol 2015; 212:75-9. [PMID: 26298507 DOI: 10.1016/j.vetpar.2015.08.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 11/28/2022]
Abstract
A number of countries in the world have reported infections with Neospora caninum in water buffalo (Bubalus bubalis), from Africa to Asia, Europe and South America and recently Australia. In general, clinical manifestations (such as abortion) seem rare, which has raised the prospect that buffalo may be inherently resistant to clinical effects of N. caninum infection. Worldwide, the seroprevalence of N. caninum infection (as a measure of exposure determined by the detection of antibody) in buffalo is high, at approximately 48%. This reported seroprevalence is three or four times higher than that reported from the world's cattle populations, which have collective seroprevalence rates of 16.1% for dairy cattle and 11.5% for beef cattle. However, there is a lack of standardisation in seroprevalence studies and some studies may well under-estimate the true level of infection. Epidemiologic evidence supports post-natal transmission, and in utero transmission has also been demonstrated. The causes for water buffalo to have markedly higher seroprevalence but apparently lower neosporosis abortion rates than cattle warrant further investigation.
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Affiliation(s)
- Michael P Reichel
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy Campus, Roseworthy, SA 5371 South Australia, Australia; City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Milton M McAllister
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy Campus, Roseworthy, SA 5371 South Australia, Australia
| | - Amar Nasir
- Department of Clinical Sciences, College of Veterinary & Animals Sciences, Jhang Subcampus, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Dadin P Moore
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
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Kengradomkij C, Inpankaew T, Kamyingkird K, Wongpanit K, Wongnakphet S, Mitchell TJ, Xuan X, Igarashi I, Jittapalapong S, Stich RW. Seroprevalence and risk factors associated with exposure of water buffalo (Bubalus bubalis) to Neospora caninum in northeast Thailand. Vet Parasitol 2015; 207:156-60. [DOI: 10.1016/j.vetpar.2014.10.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 10/31/2014] [Accepted: 10/31/2014] [Indexed: 11/26/2022]
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Chryssafidis AL, Cantón G, Chianini F, Innes EA, Madureira EH, Soares RM, Gennari SM. Abortion and foetal lesions induced by Neospora caninum in experimentally infected water buffalos (Bubalus bubalis). Parasitol Res 2014; 114:193-9. [PMID: 25324135 DOI: 10.1007/s00436-014-4178-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/06/2014] [Indexed: 10/24/2022]
Abstract
The water buffalo (Bubalus bubalis) is an important species in several countries for its milk and meat production, as well as for transport and other agricultural activities. It is, in general, considered more resistant than cattle to different parasitic diseases, also less demanding for forage quality. It has been postulated that buffalo may be resistant to abortion caused by neosporosis, because of high serological prevalences found in buffalo herds from different localities, with no description of Neospora caninum-related abortion. Recent studies have demonstrated the potential impact of neosporosis in pregnant water buffalo cows. In this work, three pregnant buffalo cows were experimentally infected with Nc-1 strain of N. caninum, and abortion was detected 35 days post-infection. Molecular and histopathological results found in post-mortem tissues are described and discussed, confirming the susceptibility of water buffalos to abortion caused by N. caninum.
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Affiliation(s)
- Andreas L Chryssafidis
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva, 87, Cidade Universitária, São Paulo, SP, 05508-000, Brazil,
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Moore DP, Konrad JL, San Martino S, Reichel MP, Cano DB, Méndez S, Späth EJL, Odeón AC, Crudeli G, Campero CM. Neospora caninum serostatus is affected by age and species variables in cohabiting water buffaloes and beef cattle. Vet Parasitol 2014; 203:259-63. [PMID: 24792747 DOI: 10.1016/j.vetpar.2014.04.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 04/08/2014] [Accepted: 04/10/2014] [Indexed: 11/24/2022]
Abstract
The aim of this study was to investigate how Neospora caninum serostatus may be affected by variables such as host species (water buffaloes or cattle) and age in animals cohabiting in the same ranch. A convenience cross-sectional study was performed on four ranches in the Northeast of Argentina, where water buffalo are cohabitating with beef cattle. Blood samples were collected from 1350 female water buffaloes (Bubalus bubalis) and 880 female beef cattle (Bos taurus and Bos indicus crossbreeds) from four ranches. Calving and weaning percentages at herd level for each ranch were also recorded. N. caninum antibody levels were measured by an indirect fluorescent antibody test (IFAT) (reciprocal antibody titers ≥ 100). Serological results were classified into 2 categories (0: negative; 1: positive). A logistic regression model was used to describe the relationship between N. caninum serostatus and specie (water buffalo or cattle), age or ranch and their interactions. Likelihood ratio tests were used to assess the significance of the model and their terms. Odds ratios were estimated and 95% profile likelihood (LR) and Wald confidence intervals (CI) obtained. Overall, specific antibody titers were found in 43.3% (584/1350) of water buffaloes and 28.6% (252/880) of cattle. Seropositive water buffaloes and cattle were observed on all ranches. Age was statistically significant (p=0.01) with an overall estimate of logit (log odds) of age of 0.03 for both species. This indicates that for every one year increase in age, the expected change in log odds of being seropositive increased by 0.03. On three of four ranches a water buffalo was 4.48, 1.54 and 2.25 times more likely to be seropositive than cattle for animals of the same age. The N. caninum serostatus was affected by age in the first place, but also by species on at least three of the four ranches. Calving and weaning percentages were higher in water buffaloes than in beef cattle (p<0.05). Even though the low pathogenicity that N. caninum seems to have in water buffaloes, this study reinforces the importance of this specie as maintenance of the disease.
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Affiliation(s)
- D P Moore
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - J L Konrad
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - S San Martino
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata (UNMDP), Balcarce, Argentina
| | - M P Reichel
- School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy Campus, SA 5371 South Australia, Australia
| | - D B Cano
- Instituto Nacional de Tecnología Agropecuaria (INTA), 7620 Balcarce, Argentina
| | - S Méndez
- Instituto Nacional de Tecnología Agropecuaria (INTA), 7620 Balcarce, Argentina
| | - E J L Späth
- Instituto Nacional de Tecnología Agropecuaria (INTA), 7620 Balcarce, Argentina
| | - A C Odeón
- Instituto Nacional de Tecnología Agropecuaria (INTA), 7620 Balcarce, Argentina
| | - G Crudeli
- Facultad de Ciencias Veterinarias, Universidad Nacional del Nordeste (UNNE), Corrientes, Argentina
| | - C M Campero
- Instituto Nacional de Tecnología Agropecuaria (INTA), 7620 Balcarce, Argentina
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Prevalence survey of selected bovine pathogens in water buffaloes in the north region of Brazil. J Parasitol Res 2014; 2014:603484. [PMID: 24563780 PMCID: PMC3915857 DOI: 10.1155/2014/603484] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 11/04/2013] [Indexed: 11/17/2022] Open
Abstract
Although the largest buffalo herd in the occident is in the north region of Brazil, few studies have been conducted to assess the prevalence of selected parasitic diseases in buffalo herd. The present study was therefore conducted to investigate the epidemiological of Toxoplasma gondii, Neospora caninum, Anaplasma marginale, Babesia bigemina, and Babesia bovis in water buffaloes in the north region of Brazil. A total of 4796 buffalo blood samples were randomly collected from five provinces and simultaneously analyzed by the IFAT and ELISA. The serological prevalence of T. gondii and N. caninum was 41.3% and 55.5% in ELISA and 35.7% and 48.8% in IFAT, respectively. The overall prevalence of A. marginale, B. bovis, and B. bigemina was 63%, 25%, and 21% by ELISA and 50.0%, 22.5%, and 18.8% by IFAT, respectively. This study shows valuable information regarding the serological survey of selected bovine pathogens in water buffaloes in the north region of Brazil which will likely be very beneficial for the management and control programs of this disease.
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Konrad JL, Campero LM, Caspe GS, Brihuega B, Draghi G, Moore DP, Crudeli GA, Venturini MC, Campero CM. Detection of antibodies against Brucella abortus, Leptospira spp., and Apicomplexa protozoa in water buffaloes in the Northeast of Argentina. Trop Anim Health Prod 2013; 45:1751-6. [DOI: 10.1007/s11250-013-0427-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2013] [Indexed: 10/26/2022]
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16
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Prevalence of Neospora caninum antibodies in dairy cattle and water buffaloes and associated abortions in the plateau of Southern Peninsular India. Trop Anim Health Prod 2012; 45:205-10. [PMID: 22644733 DOI: 10.1007/s11250-012-0192-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2012] [Indexed: 10/28/2022]
Abstract
A seroprevalence study of bovine neosporosis was conducted among 1,927 dairy cattle and 341 water buffaloes from Karnataka and Andhra Pradesh states in plateau of southern peninsular India by employing competitive enzyme-linked immunosorbent assay. Overall, 12.61 and 9.97 % sera samples were found positive for the presence of Neospora caninum antibody, respectively, among cattle and water buffaloes. Out of 1,927 sera samples from cattle, 912 and 1,015 samples were collected from unorganized and organized herds, respectively. The cattle screened were of upgraded Holstein-Friesian and water buffaloes were of graded Surti breed. Significantly (p < 0.05) higher prevalence was found in the cattle in unorganized herds (16.66 %) in comparison to organized herds (8.96 %). The highest seroprevalence was recorded in the age group of 4 years and above in both type of cattle herds and water buffaloes. There was a significant variation of seroprevalence (p < 0.05) observed between different age groups of cattle. The rate of seroprevalence increased with the increment in the age of the animals suggesting a possibility of horizontal mode of transmission of the infection from the environment. The percentage of abortion history was more in seropositive group (51.65 %) in comparison to the seronegative group (5.84 %) and the seropositive cattle were 8.84 times more likely to experience abortion than the seronegative cattle. The occurrence of abortion among different age groups varied significantly (p < 0.05). The findings revealed the presence of neosporosis in the southern peninsular India among cattle and water buffaloes and a strong association between the seroprevalence and abortion.
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Experimental inoculation of Neospora caninum in pregnant water buffalo. Vet Parasitol 2011; 187:72-8. [PMID: 22244534 DOI: 10.1016/j.vetpar.2011.12.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 12/13/2011] [Accepted: 12/21/2011] [Indexed: 11/21/2022]
Abstract
The aim of this study was to characterize the pathogenesis of Neospora caninum in experimentally inoculated pregnant water buffalo (Bubalus bubalis). Twelve Mediterranean female water buffaloes ranging in age from 4 to 14 years old and seronegative to N. caninum by indirect fluorescent antibody test (IFAT) were involved. Ten females were intravenously inoculated with 10(8) tachyzoites of NC-1 strain at 70 (n=3) or 90 (n=7) days of pregnancy (dp). Two control animals were inoculated with placebo at 70 and 90 dp, respectively. Serum samples were obtained weekly following inoculation to the end of the experiment. Three animals inoculated at 70 dp were slaughtered at 28 days post inoculation (dpi), three animals inoculated at 90 dp were slaughtered at 28 dpi and the remaining four animals inoculated at 90 dp were slaughtered at 42 dpi. Fetal fluids from cavities and tissue samples were recovered for IFAT and histopathology, immunohistochemistry and PCR, respectively. Genomic DNA from fetal tissues was used for parasite DNA detection and microsatellite genotyping in order to confirm the NC-1 specific-infection. Dams developed specific antibodies one week after the inoculation and serological titers did not decrease significantly to the end of the experiment. No abortions were recorded during the experimental time; however, one fetus from a dam inoculated at 70 dp was not viable at necropsy. Specific antibodies were detected in only two fetuses from dams inoculated at 90 dp that were slaughtered at 42 dpi. No macroscopic changes in the placentas and organs of viable fetuses were observed. Nonsuppurative placentitis was a common microscopic observation in Neospora-inoculated specimens. Microscopic fetal lesions included nonsuppurative peribronchiolar interstitial pneumonia, epicarditis and myocarditis, interstitial nephritis, myositis and periportal hepatitis. Positive IHC results were obtained in two fetuses from dams inoculated at 70 dp and slaughtered at 28 dpi. N. caninum DNA was detected in placentas and fetuses from all inoculated animals. The pattern of amplified microsatellites from placental and fetal tissues resembled the NC-1 strain. Water buffaloes, like cattle, are susceptible to experimental inoculation with N. caninum at early pregnancy.
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Nasir A, Ashraf M, Khan MS, Yaqub T, Javeed A, Avais M, Akhtar F. Seroprevalence of Neospora caninum in Dairy Buffaloes in Lahore District, Pakistan. J Parasitol 2011; 97:541-3. [DOI: 10.1645/ge-2687.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Evidence of congenital transmission of Neospora caninum in naturally infected water buffalo (Bubalus bubalis) fetus from Brazil. Parasitol Res 2010; 108:741-3. [DOI: 10.1007/s00436-010-2214-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 10/06/2010] [Indexed: 10/18/2022]
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Silva SP, Mota RA, Faria EB, Fernandes EF, Neto OL, Albuquerque PP, Dias HL. Anticorpos IgG anti-Neospora caninum e Toxoplasma gondii em búfalas (Bubalus bubalis) criadas no estado do Pará. PESQUISA VETERINARIA BRASILEIRA 2010. [DOI: 10.1590/s0100-736x2010000500012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Para determinar a ocorrência de anticorpos IgG anti-Neospora caninum e Toxoplasma gondii em 14 unidades produtivas de búfalos, situadas em 13 municípios no estado do Pará, foram coletadas amostras de soro sanguíneo de 374 fêmeas adultas. Os soros foram submetidos à reação de imunofluorescência indireta (RIFI), utilizando-se os títulos 200 e 64, respectivamente como ponto de corte para N. caninum e T. gondii. Obteve-se 153 (40,9%) de animais soropositivos para N. caninum com 100% das propriedades com focos da infecção, enquanto que quatro búfalas (1,1%) foram soropositivas em quatro fazendas para T. gondii e uma búfala (0,27%) foi soropositiva para ambos parasitos. A presença de anticorpos é um indicativo da circulação desses protozoários em búfalos das propriedades estudadas, representando uma fonte de infecção para outros animais, assim como o possível envolvimento em distúrbios reprodutivos nessa espécie.
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