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Vieira, M. I. B.; Bordin, T.; Agnol, B. D.; Zanchin, F.; Motta, A. C. da; Noro, M.
Author Affiliation :
Veterinary Parasitology Laboratory, School of Agronomy and Veterinary Medicine - FAMV, University of Passo Fundo - UPF, Campus I, BR 285, Km 171, Bairro São José, CEP 99001-970, Passo Fundo, RS, Brazil.
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Brazilian Journal of Veterinary Parasitology
Here we describe an outbreak of chorioptic mange in cattle, 56 years after its first identification in Brazil. Between the months of June and July 2011, dermatitis characterized by alopecia and crusted and thickened skin at the insertion of the tail and in the ischiorectal fossa was recognized in 40 (35.7%) out of 112 Holstein cows on a farm in the northeastern mesoregion of the state of Rio Grande do Sul, Brazil. After diagnosing mange caused by Chorioptes bovis, the cows were weighed and treated with 0.5% ivermectin, as a pour-on single dose, and were separated into two groups: cows in early lactation and those in late lactation. The survival rate of C. bovis and the healing rate in the two groups of infested cows were monitored every seven days through skin scrapings. After 28 days of evaluation, the cure rate through treatment was greater among cows in early lactation (p<0.0001). The survival rate of C. bovis was higher in cows in late lactation.
Record Number :
Colégio Brasileiro de Parasitologia Veterinária
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Indexing terms for this abstract:
Organism descriptor(s) :
cattle, Chorioptes bovis
alopecia, clinical aspects, cows, dairy cattle, dairy cows, dermatitis, diagnosis, disease prevalence, drug therapy, ectoparasites, ectoparasitoses, emerging infectious diseases, epidemiology, infections, ivermectin, lactation stage, outbreaks, parasites, parasitoses, skin diseases, skin lesions
chemotherapy, clinical picture, dermatoses, emerging diseases, emerging infections, parasitic diseases, parasitic infestations, parasitosis
Geographical Location(s) :
Brazil, Rio Grande do Sul
Broader term(s) :
Bos, Bovidae, ruminants, Artiodactyla, mammals, vertebrates, Chordata, animals, eukaryotes, Chorioptes, Psoroptidae, Astigmata, mites, Acari, Arachnida, arthropods, invertebrates, Community of Portuguese Language Countries, Developing Countries, Latin America, America, South America, Threshold Countries, Brazil