Epidemiological aspects of bovine parasitic otitis caused by Rhabditis spp. and/or Raillietia spp. in the state of Minas Gerais, Brazil

Veterinary Parasitology
Eduardo Robson DuarteJúnia Soares Hamdan

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 epidemiologi...Continue Reading

References

Jan 1, 1992·Memórias do Instituto Oswaldo Cruz·J L FacciniA L da Costa
Feb 1, 1986·Tropical Animal Health and Production·P MsollaJ Monrad
Sep 1, 1993·Australian Veterinary Journal·T F JubbR H Wroth
Feb 1, 1993·Tropical Animal Health and Production·P MsollaM K Shoo
Sep 25, 1999·Medical Mycology·Eduardo Robson DuarteJúnia Soares Hamdan

Citations

Jul 3, 2009·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Michael J AdkessonR Avery Bennett
Jan 24, 2006·The Veterinary Journal·R Krametter-FroetscherW Baumgartner
Mar 7, 2014·Journal of Clinical Microbiology·Magnus TeschnerMathias Walter Hornef
Mar 5, 2004·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·Eduardo Robson Duarte, Júnia Soares Hamdan
Apr 9, 2013·Revista Do Instituto De Medicina Tropical De São Paulo·Millan Scarabeli Alves Coelho da SilvaPaula Prazeres Magalhães
Jun 13, 2019·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Samilla Alves SobralFabio Ribeiro Braga

Related Concepts

Age Factors
Metazoa
Breeding
Bos indicus
Cattle Diseases
Horns
Mange
Otitis Externa
Seasonal Variation
Turbatrix

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