Occurrence of antibodies against Neospora caninum in sows and factors associated with infection in commercial herds in two regions of the state of Santa Catarina, Brazil
DOI:
https://doi.org/10.5433/1679-0359.2020v41n2p697Palabras clave:
IFAT, Neosporosis, Occurrence, Swine.Resumen
Neosporosis is a disease that affects ruminants, horses, swine, and wild animals, causing reproductive disorders and economic losses. The importance of the infection in pigs has not been fully elucidated. The objective of the present study was to verify the occurrence of antibodies against Neospora caninum and the possible factors associated with infection in swine herds from two regions of the state of Santa Catarina, Brazil. A total of 498 blood samples were collected from sows of western (five properties) and southern (four properties) regions of the state, and an epidemiological questionnaire was administered. Sera obtained from the blood were tested by indirect fluorescent antibody test (IFAT) (cutoff point 1:50) using tachyzoites of N. caninum NC1 strain as antigen. Positive samples were two-fold serially diluted until maximum reactivity titer. The results were analyzed using Fisher and Chi-square tests to determine correlation between serology and associated factors. The overall prevalence was 18.9% (94/498) with titers of 50 (27), 100 (26), 200 (22), 400 (10), and 800 (9). Eighty of 256 samples (31.3%) from the western region were positive, while 14 out of 242 samples (5.8%) from the southern region were positive. A correlation (p < 0.01) was observed among the seroprevalence and contact with dogs (OR = 3.97, IC 2.64-6.43), presence of rodents (OR = 7.37 IC 4.06-13.50), and water source (OR = 2.38 IC 1.44-3.91). The use of anti-bird nets was identified as a protective factor against infection (OR = 0.36 IC 0.07-0.25). These results demonstrate the high prevalence of antibodies against N. caninum in commercial swine herds in the state of Santa Catarina compared to that in other regions of Brazil.Citas
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Waladjo, A. R., Chatagnon, S. N., Bakou, H., & Diop, P. E. H. (2009). Neospora caninum antibodies and its consequences for reproductive characteristics in wandering sows from Senegal West África. Asian Journal of Animal and Veterinary Advances, 4(5), 263-266. doi: 10.3923/ajava.2009.263.266
Barling, K, S., McNeill, J. W., Paschal, J. C., McCollum III, F. T., Craig, T. M., Adams, L. G., & Thompson, J. A. (2001). Ranch-management factors associated with antibody seropositivity for Neospora caninum in consignments of beef calves in Texas, USA. Preventive Veterinary Medicine, 52(1), 53-61. doi: 10.1016/S0167-5877(01)00233-1
Bartová, E., & Sedlacl, K. (2011). Seroprevalence of Toxoplasma gondii and Neospora caninum in slaughtered pigs in the Czech Republic. Parasitology, 138(11), 1369-1371. doi: 10.1017/S003118201100104
Bevins, S., Blizzard, E., Bazan, L., & Whitley, P. (2013). Neospora caninum exposure in overlapping population of coiyotes (Canis latrans) and feral swines (Sus scrofa). Journal of Wildlife Diseases, 49(4), 1028-1032. doi: 10.7589/2013-02-034
Conrad, P. A., Sverlow, K., Anderson, M., Rowe, J., Bom Durant, R., Tuter, G., . . . Ardans, A. (1993). Detection of serum antibody responses in cattle with natural or experimental Neospora spp. infections. Journal of Veterinary Diagnostic Investigation, 5(4), 572-578. doi: 10.1177/104063879300500412
Damriyasa, I. M., Bauer, C., Edelhofer, R. Failing, K., Lind, P., Petersen, E., . . . Zahner, H. (2004) Cross-sectional survey in pig breeding farms in Hesse, Germany: seroprevalence and risk factors of infections with Toxoplasma gondii, Sarcocystis spp. and Neospora caninum in sows. Veterinary Parasitology, 126(3), 271-286. doi: 10.1177/104063879300500412
Dantas, S. B. A., Fernander, A. R. F., Souza, O. B., Neto, Mota, A., Alves, C. J., & Azevedo, S. (2013). Ocorrência e fatores de risco associados a infecções por T. gondii e N.caninum em cães do município de Natal, estado de Rio Grande do Norte, nordeste Brasil. Ciência Rural, 43(11), 242-248. doi: 10.1590/S0103-84782013001100020
Dubey, J. P., Schares, G., & Ortega-Mora, L. M. (2007). Epidemiology and control of neosporosis and Neospora caninum. Clinical Microbiology Reviews, 20(20), 323-367. doi: 10.1128/CMR.00031-06
Feitosa, T. F., Vilela, V. L. R., Melo, L. R. B., Almeida, J. L., Neto, Souto, L. R. B., Morais, D. F., . . . Pena, S. S. J. (2014). Toxoplasma gondii and Neospora caninum in slaughtered pigs from northeast Brazil. Veterinary Parasitology, 202(3), 305-309. doi: 10.1016/j.vetpar.2014.03.015
Helmick, B., Otter, J., Mcgarry, D., & Buxton, D. (2002). Serological investigation of aborted sheep and pigs for infection by Neospora caninum. Research in Veterinary Science, 73(2), 187-189. doi: 10.1016/S0034-5288(02)00093-0
Huang, C. C., Yang, C. H., Watanabe, Y., Liao, Y. K., & Ooi, H. K. (2004). Finding of Neospora caninum in the wild brownrat (Rattus norvegicus). Veterinary Research, 35(3), 283-290. doi: 10.1051/vetres:2004010
Lindsay, D. S., Rippey, N. S., Powe, T. A., Sartin, E. A., Dubey, J. P., & Blagburn, B. L. (1995). Abortions, fetal death, and stillbirths in pregnant pygmy goats inoculated witch tachyzoites of Neospora caninum. American Journal of Veterinary Research, 56(9), 1176-1180.
Otranto, D. L., Llazari, A., Traversa, D., Regalbono, F., Badan, M., & Capelli, G., (2003). Seroprevalence and associated risk factors of neosporosis in beef and dairy cattle in Italy. Veterinary Parasitology, 118(1), 7-18. doi: 0.1016/j.vetpar.2003.10.008
Paré, J., Fecteau, G., Fortin, M., & Marsolais, G., (1998). Seroepidemiologic study of Neospora caninum in dairy herds. Journal of the American Veterinary Medical Association, 213(11), 1595-1598.
R Development Core Team. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna: 2009. Recovered form http://www. R-project.org
Sobestiansky, J., Wentz, I., Silveira, P. R., & Sesti, L. A. C. (1998). Suinocultura Intensiva: produção, manejo e saúde do rebanho. Brasília: EMBRAPA.
Waladjo, A. R., Chatagnon, S. N., Bakou, H., & Diop, P. E. H. (2009). Neospora caninum antibodies and its consequences for reproductive characteristics in wandering sows from Senegal West África. Asian Journal of Animal and Veterinary Advances, 4(5), 263-266. doi: 10.3923/ajava.2009.263.266
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2020-03-06
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Silva, M. O. da, Snak, A., Reiter, J. C., Serighelli Junior, G., Cristani, J., & Moura, A. B. de. (2020). Occurrence of antibodies against Neospora caninum in sows and factors associated with infection in commercial herds in two regions of the state of Santa Catarina, Brazil. Semina: Ciências Agrárias, 41(2), 697–702. https://doi.org/10.5433/1679-0359.2020v41n2p697
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