Prevalence and Risk Factors for Borrelia burgdorferi Infection in Mexicali, Baja California, a Mexico- US Border City
نویسندگان
چکیده
Lyme borreliosis is a worldwide zoonotic disease caused by the spirochete Borrelia burgdorferi, which is transmitted by a tick bite, primarily from Ixodes scapularis and Ixodes pacificus. It is characterized by polysystemic disorders. In Mexico, native Lyme disease has been recently reported in humans. In dogs, B burgdorferi infection has been also reported in several areas of the country. In Monterrey, Nuevo Leon, Mexico, a seroprevalence of 16% was observed in dogs (136/850) and molecular evidence was found in dog synovial fluid. Moreover, a preliminary study performed in 2003 in Mexicali, Baja California, Mexico showed a prevalence of 7.4% (7/94) in dogs infested only by the tick Rhipicephalus sanguineus. The aim of this study was to estimate the seroprevalence of B burgdorferi in canine patients that were brought into private veterinary clinics in Mexicali. Out of a total of 98 active private clinics in Mexicali, 39 (40%) agreed to participate. Blood samples of 384 dogs were randomly selected from February 2005 to December 2006, and their sera were analyzed with 96% sensitivity and 95% specificity. An adjusted prevalence of 6.8% (95% CI 3.5%-8.9%) was obtained. Prevalence and Risk Factors for Borrelia burgdorferi Infection in Mexicali, Baja California, a MexicoUS Border City Luis Tinoco-Gracia, MSc1,2 Héctor Quiroz-Romero, PhD2 María Teresa Quintero-Martínez, PhD2 Tomás Benjamín Rentería-Evangelista, PhD1 Alberto Barreras-Serrano, MSc1 Sawako Hori-Oshima, PhD1 Gerardo Medina-Basulto, PhD1 Javier Vinasco, PhD3 Manuel H. Moro, PhD4 1Instituto de Investigaciones en Ciencias Veterinarias Universidad Autónoma de Baja California Baja California, Mexico 2Facultad de Medicina Veterinaria y Zootecnia Universidad Nacional Autónoma de México Mexico City, Mexico 3College of Veterinary Medicine Kansas State University Manhattan, Kansas, USA 4Division of Comparative Medicine National Center for Research Resources National Institutes of Health Bethesda, Maryland, USA
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