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Prevalence of Antibodies to Neospora caninum and Toxoplasma gondii in Swedish Dogs
Acta Veterinaria Scandinavica volume 35, pages 445–447 (1994)
Abstract
Neospora caninum is a newly described coccidian parasite which has been found in various species such as the dog, cattle, horse, sheep and goat. Morphologically it resembles Toxoplasma gondii with which it is related (Holmdahl et al. 1994), and with which it has earlier been confused. The life cycle of N caninum is only partially known. Tachyzoites and tissue cysts are the only known stages of the parasite, and transplacental transmission is the only known route of infection. Subclini-cally infected dams can transmit the parasite to their fetuses and successive offspring from the same mother might be born infected (Dubey et al. 1990b). Clinical neosporosis is mostly seen in pups or young dogs, and the majority or all pups in a litter are often affected. The disease is characterized by ascending paralysis of the legs, with the hind legs more severely affected than the front legs, paralysis of the jaw, difficulty in swallowing and muscle flaccidity and atrophy (Dubey 1992, Dubey & Lindsay 1993). Fatal infections with N caninum in dogs have been reported from many countries, e.g. Norway (Bjerkäs & Presthus 1988), USA (Dubey et al. 1988), Sweden (Uggla et al. 1989a,b) and the United Kingdom (Dubey et al. 1990a). Serological surveys for antibodies to N. caninum in dogs from Kansas, USA and England have shown a prevalence of 2 and 13%, respectively (Lindsay et al. 1990, Trees et al. 1993).
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Acknowledgments
The authors are grateful to Dr. J.P. Dubey for providing the NC-1 isolate of N. caninum, to Dr. J.M. Holmdahl for maintaining the parasites in cell culture, and to Ms Britt-Louise Ljungström for technical assistance. Financial support was obtained from Agria Insurances Inc. and in part by the Swedish Council for Forestry and Agricultural Research. The study was a part of the EU collaboration COST 820.
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Björkman, C., Lundén, A. & Uggla, A. Prevalence of Antibodies to Neospora caninum and Toxoplasma gondii in Swedish Dogs. Acta Vet Scand 35, 445–447 (1994). https://doi.org/10.1186/BF03548321
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DOI: https://doi.org/10.1186/BF03548321