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Epidemiological aspects of bovine parasitic otitis caused by Rhabditis spp. and/or Raillietia spp. in the state of Minas Gerais, Brazil.
- Source :
-
Veterinary parasitology [Vet Parasitol] 2001 Oct 31; Vol. 101 (1), pp. 45-52. - Publication Year :
- 2001
-
Abstract
- The occurrence of bovine external otitis in tropical regions is predominantly assigned to parasitic infections by rhabditiform nematodes and infestations by mites of the genus Raillietia. This research had the purpose of investigating the prevalence of parasitic otitis in the dry and rainy seasons of Minas Gerais and correlating it with variables age, breed and the presence of horns. The secretion or cerumen of 981 cattle was collected with sterile swabs, placed in test tubes and exposed to sunlight for the identification of clinical infections caused by rhabditiform nematodes. The ear canals of 109 animals were flushed to study the occurrence of mites of the genus Raillietia. Clinical otitis caused by rhabditiform nematodes was observed only in animals of the Gyr breed, affecting 169 (60.1%) of the total (278) of these cattle. The prevalence of otitis in this breed was significantly higher for mature adult cows (P<0.001) and in cows with horns (P<0.001). In a total of nine animals suspected of raillietiosis, the examinations revealed the presence of Raillietia spp. in two Dutch cows. These results demonstrate that treatment must be focused on adult Gyr cattle with horns. This and future studies with an emphasis on epidemiological aspects may contribute to development of alternative approaches to reduce disease.
- Subjects :
- Age Factors
Animals
Brazil epidemiology
Breeding
Cattle
Cattle Diseases genetics
Cattle Diseases parasitology
Female
Genetic Predisposition to Disease
Horns parasitology
Mite Infestations epidemiology
Mite Infestations veterinary
Otitis Externa epidemiology
Otitis Externa parasitology
Prevalence
Rhabditida Infections epidemiology
Rhabditida Infections veterinary
Rhabditoidea
Seasons
Cattle Diseases epidemiology
Otitis Externa veterinary
Subjects
Details
- Language :
- English
- ISSN :
- 0304-4017
- Volume :
- 101
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Veterinary parasitology
- Publication Type :
- Academic Journal
- Accession number :
- 11587832
- Full Text :
- https://doi.org/10.1016/s0304-4017(01)00492-7