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EAR MITES, OTODECTES CYNOTIS, ON WILD FOXES (PSEUDALOPEX SPP.) IN CHILE.

Authors
  • Briceño, Cristóbal1
  • González-Acuña, Daniel2
  • Jiménez, Jaime E3
  • Bornscheuer, María Loreto1
  • Funk, Stephan M4, 5
  • Knapp, Leslie A6
  • 1 ConserLab, Department of Animal Preventive Medicine, Faculty of Animal and Veterinary Sciences, Universidad de Chile, Santiago 8820808, Chile. , (Chile)
  • 2 Department of Animal Sciences, Universidad de Concepción, Chillán 3812120, Chile. , (Chile)
  • 3 Department of Biological Sciences, University of North Texas, Denton, Texas 76203, USA.
  • 4 Nature Heritage, St. Lawrence, Jersey JE3 1, Channel Islands. , (Jersey)
  • 5 Centro de Excelencia en Medicina Traslacional, Universidad de la Frontera, Temuco 4810296, Chile. , (Chile)
  • 6 Department of Anthropology, University of Utah, Salt Lake City, Utah 84112, USA.
Type
Published Article
Journal
Journal of wildlife diseases
Publication Date
Jan 01, 2020
Volume
56
Issue
1
Pages
105–112
Identifiers
PMID: 31329523
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

We found the ear mite parasite (Otodectes cynotis; Acari: Psoroptidae) in two distant insular endangered fox populations in Chile. We identified O. cynotis in both the Darwin's fox (Pseudalopex fulvipes) from Chiloé and the Fuegian culpeo (Pseudalopex culpaeus lycoides) in Tierra del Fuego. These populations are approximately 2,000 km apart. Infestation rates were high for both endemic foxes: 76% (19/25) of Darwin's foxes were affected, and 73% (11/15) of Fuegian culpeos had ear mites. Two Darwin's foxes had abundant ear discharge, and one of these also exhibited secondary infections of Morganella morganii and Geotrichum sp. fungi. Mites were characterized molecularly as Otodectes spp. for the Fuegian culpeo samples. Genetic analyses of two mites found the O. cynotis genotype I, as well as what appeared to be a new allele sequence for O. cynotis. These results confirmed the hypothesis of a worldwide distribution species of ear mite. Introduced chilla foxes (Pseudalopex griseus; n=11) on Tierra del Fuego Island and domestic dogs (Canis lupus familiaris; n=379) from both islands were also sampled, but they showed no signs of infection. Our findings provided insight into the genetic diversity, the origins, and the possible impact of this globally distributed mite on endemic free-ranging populations of foxes.

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