title: [Asymptomatic human infection from contact with dogs: a case of human ehrlichiosis].
abstract: BACKGROUND
  Living with dogs leads one to consider the necessity of identifying canine infections found in the people with whom the dogs live.
  
  
  OBJECTIVE
  Dogs which were clinically and serologically positive with the infections Ehirlichia canis, Anaplasma phagocytophilum, Borrelia burgdorferi, and Dirofilaria Immitis were sought. People with the same infections were also identified.
  
  
  METHODS
  From a population of 80 dogs identified in the villages of San Bartolo Coyotepec and San Agustín Etla (suburbs peripheral to the city of Oaxaca, Mexico), 27 dogs were selected for study, all of which had adenomegaly, hepatomegaly, splenomegaly, and fevers of at least 43° C. Using enzyme immunoassay in this population of dogs and their closest human contacts, antibodies for Ehirlichia canis, Anaplasma phagocytophilum, Borrelia burgdorferi, and the antigen for Dirofilaria immitis were sought. Positive results in humans were confirmed by polymerase chain reaction (PCR).
  
  
  RESULTS
  Ten dogs with the clinical signs mentioned above tested positive for antibodies to Ehrlichia canis; two cases tested positive for Anaplasma phagocytophilum; one case tested positive for Dirofilaria Immitis. From human contact, one person tested positive for Ehirlichia canis; this case was confirmed by DNA amplification by means of PCR.
  
  
  CONCLUSIONS
  It is necessary to identify the population of sick dogs in order to reduce related infections in people.
authors.affiliation: Centro de Investigación en Ciencias Médicas y Biológicas, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca (UABJO), Oax. perezcampos@prodigy.net.mx.
authors.forename: Angela
authors.initials: A
authors.lastname: Beatriz Silva
authors.forename: Socorro
authors.initials: S
authors.lastname: Pina Canseco
authors.forename: María Del Pilar
authors.initials: Mdel P
authors.lastname: Gabriel de la Torre
authors.forename: Alejandro
authors.initials: A
authors.lastname: Mayoral Silva
authors.forename: Miguel Ángel
authors.initials: MÁ
authors.lastname: Mayoral
authors.forename: Laura
authors.initials: L
authors.lastname: Pérez-Campos Mayoral
authors.forename: Jael
authors.initials: J
authors.lastname: López Martínez
authors.forename: Eduardo
authors.initials: E
authors.lastname: Pérez-Campos
mesh_terms: D000328:Adult; D041081:Anaplasma phagocytophilum / Q000276:immunology; D000818:Animals; D025065:Borrelia burgdorferi / Q000276:immunology; D004183:Dirofilaria immitis / Q000276:immunology; D004197:Disease Reservoirs / Q000382:microbiology / Q000469:parasitology / Q000662:veterinary*; D004285:Dogs; D041061:Ehrlichia canis / Q000276:immunology; D016873:Ehrlichiosis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D009784:Occupational Diseases / Q000175:diagnosis*; D064927:Tick Bites / Q000150:complications; D015047:Zoonoses