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Occurrence of abortions induced by Neospora caninum in dairy cattle from Santa Catarina, southern Brazil

Overview of attention for article published in Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria, January 2017
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Title
Occurrence of abortions induced by Neospora caninum in dairy cattle from Santa Catarina, southern Brazil
Published in
Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria, January 2017
DOI 10.1590/s1984-29612017051
Pubmed ID
Authors

Cesar Augusto Barbosa de Macedo, Madlaine Frigo Silveira Barbosa de Macedo, Ana Carolina Miura, Alessandra Taroda, Sergio Tosi Cardim, Elisabeth Ann Innes, Frank Katzer, German Jose Cantón, Francesca Chianini, Selwyn Arlington Headley, João Luis Garcia

Abstract

The aim of the present study was to investigate the occurrence of N. caninum associated with abortions of dairy cattle from Santa Catarina state, southern Brazil by using enzyme-linked immunosorbent assay (ELISA), immunohistochemistry (IHC), and polymerase chain reaction (PCR). Blood from dairy cows that aborted along with intrathoracic fluid and tissue samples (brain, heart, liver, and lung) from their fetuses were collected and used for serology; PCR, histopathological, and immunohistochemistry (IHC) evaluations were also conducted. Twenty-one cows (51.2%) out of 41, and eight fetuses (26.7%) out of 30 were ELISA (HerdCheck, IDEXX) positive for N. caninum. Dams > 36 months of age had a higher risk of being serum positive than younger animals. PCR and IHC revealed that 38.8% (14/36) and 25.0% (9/36) of the fetuses were positive for N. caninum, respectively for each of the tests. Seropositive cows had a higher frequency of fetuses that were also positive by either intrathoracic fluid, PCR, or IHC. In summary, the present study observed a high frequency of N. caninum in abortions from dairy cows from southern Brazil, with a higher N. caninum prevalence found in cows that were older than 36 months. In addition, serology, PCR, and IHC should be used all together for better diagnosis of neosporosis in cattle.

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Mendeley readers

The data shown below were compiled from readership statistics for 19 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 19 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 4 21%
Student > Ph. D. Student 3 16%
Student > Bachelor 2 11%
Unspecified 1 5%
Student > Doctoral Student 1 5%
Other 3 16%
Unknown 5 26%
Readers by discipline Count As %
Veterinary Science and Veterinary Medicine 5 26%
Agricultural and Biological Sciences 4 21%
Pharmacology, Toxicology and Pharmaceutical Science 1 5%
Biochemistry, Genetics and Molecular Biology 1 5%
Unspecified 1 5%
Other 1 5%
Unknown 6 32%