A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd
<p/> <p>A longitudinal study was performed in a Swedish dairy herd where <it>Neospora caninum </it>had been isolated from a stillborn calf. Starting in autumn 1994, blood samples from all female animals in the herd were collected once yearly until 1999. The sera were analysed...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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BMC
2003-06-01
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| Series: | Acta Veterinaria Scandinavica |
| Subjects: | |
| Online Access: | http://www.actavetscand.com/content/44/2/63 |
| _version_ | 1818083568790798336 |
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| author | Uggla Arvid Kindahl Hans Stenlund Susanne Björkman Camilla |
| author_facet | Uggla Arvid Kindahl Hans Stenlund Susanne Björkman Camilla |
| author_sort | Uggla Arvid |
| collection | DOAJ |
| description | <p/> <p>A longitudinal study was performed in a Swedish dairy herd where <it>Neospora caninum </it>had been isolated from a stillborn calf. Starting in autumn 1994, blood samples from all female animals in the herd were collected once yearly until 1999. The sera were analysed for presence of IgG<sub>1 </sub>antibodies to <it>N. caninum </it>by the iscom ELISA, and by an avidity ELISA to establish the timing of infection. In addition, data on reproductive performance were compiled. During the study the percentage of seropositive female animals increased from 63% to 87%. In 1994 a large number of young animals tested seropositive although their dams were seronegative, indicating that a transmission of the parasite other than the vertical had recently occurred. Low avidity values supported this assumption. The annual abortion rate increased from a mean of 2% before the initiation of the study to 9% in 1994–1998. During the same time, as judged by the avidity data, a large proportion of the animals shifted from being recently to being chronically infected. The source of the external infection in the herd could not be identified.</p> |
| first_indexed | 2024-12-10T19:40:04Z |
| format | Article |
| id | doaj.art-019cdf9063b143b3b150a134ced0881e |
| institution | Directory Open Access Journal |
| issn | 1751-0147 |
| language | English |
| last_indexed | 2024-12-10T19:40:04Z |
| publishDate | 2003-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Acta Veterinaria Scandinavica |
| spelling | doaj.art-019cdf9063b143b3b150a134ced0881e2022-12-22T01:36:01ZengBMCActa Veterinaria Scandinavica1751-01472003-06-01442637110.1186/1751-0147-44-63A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy HerdUggla ArvidKindahl HansStenlund SusanneBjörkman Camilla<p/> <p>A longitudinal study was performed in a Swedish dairy herd where <it>Neospora caninum </it>had been isolated from a stillborn calf. Starting in autumn 1994, blood samples from all female animals in the herd were collected once yearly until 1999. The sera were analysed for presence of IgG<sub>1 </sub>antibodies to <it>N. caninum </it>by the iscom ELISA, and by an avidity ELISA to establish the timing of infection. In addition, data on reproductive performance were compiled. During the study the percentage of seropositive female animals increased from 63% to 87%. In 1994 a large number of young animals tested seropositive although their dams were seronegative, indicating that a transmission of the parasite other than the vertical had recently occurred. Low avidity values supported this assumption. The annual abortion rate increased from a mean of 2% before the initiation of the study to 9% in 1994–1998. During the same time, as judged by the avidity data, a large proportion of the animals shifted from being recently to being chronically infected. The source of the external infection in the herd could not be identified.</p>http://www.actavetscand.com/content/44/2/63Neospora caninumparasitecattletransmissionabortionantibodiesIgG avidity |
| spellingShingle | Uggla Arvid Kindahl Hans Stenlund Susanne Björkman Camilla A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd Acta Veterinaria Scandinavica Neospora caninum parasite cattle transmission abortion antibodies IgG avidity |
| title | A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd |
| title_full | A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd |
| title_fullStr | A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd |
| title_full_unstemmed | A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd |
| title_short | A Long-Term Study of <it>Neospora caninum </it>Infection in a Swedish Dairy Herd |
| title_sort | long term study of it neospora caninum it infection in a swedish dairy herd |
| topic | Neospora caninum parasite cattle transmission abortion antibodies IgG avidity |
| url | http://www.actavetscand.com/content/44/2/63 |
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