Molecular Diagnosis of Ehrlichia canis in Dogs and Ticks Rhipicephalus sanguineus (Acari: Ixodidae) in Yucatan, Mexico

Journal of Medical Entomology
Henry Pat-NahEnrique Reyes-Novelo

Abstract

Ehrlichia canis is the etiological agent behind canine monocytic ehrlichiosis, and the tick Rhipicephalus sanguineus (Latreille) is its main vector. Blood smear and nested polymerase chain reaction (PCR) techniques were used to identify E. canis infection in dogs and R. sanguineus, and explore factors possibly associated with infection in dogs in Yucatan, Mexico. Blood samples were taken and ticks R. sanguineus collected from 50 dogs (10 house dogs and 40 in an animal control center). Data were collected on dog age, sex, body condition, and signs associated with platelet deficiencies (epistaxis). Blood smears were analyzed to identify E. canis morulae and generate platelet counts. Nested PCR analysis was done on blood samples and 200 ticks. A χ(2) test was done to identify factors associated with the E. canis infection in the tested dogs. The overall prevalence for infection, as determined by PCR, was 36% (18 out of 50). All positive dogs were from samples collected from the animal shelter, representing prevalence, for this sampling site, of 45% (18 out of 40). Morulae in monocytes were identified in only 4% of samples. Dog origin (i.e. animal control center) was the only variable associated with E. canis infection (P < 0.01). ...Continue Reading

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Citations

Jan 23, 2016·Veterinary Parasitology·R I Rodríguez-VivasA A Pérez de León
Dec 1, 2015·Ticks and Tick-borne Diseases·Consuelo AlmazánJosé de la Fuente
May 30, 2016·Ticks and Tick-borne Diseases·Gabriel L CicuttinFederico E Gury Dohmen
Aug 14, 2018·Transboundary and Emerging Diseases·Melina M Ojeda-ChiSandra L Villegas-Perez
Nov 20, 2016·Medical and Veterinary Entomology·R I Rodriguez-VivasM E Bolio-González
Mar 29, 2019·Parasites & Vectors·Ricardo G Maggi, Friederike Krämer
Nov 14, 2019·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Pablo ArenasClaudia Rangel-Escareño
Jan 18, 2017·Journal of Tropical Medicine·Pedro Pablo Martínez-VegaCarlos Humberto Sauri-Arceo
Sep 17, 2019·Comparative Immunology, Microbiology and Infectious Diseases·Melina M Ojeda-ChiSandra L Villegas-Perez
Jan 4, 2017·Veterinary Parasitology·R I Rodriguez-VivasA A Pérez de León

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