Detección de Anaplasmataceae en garrapatas colectadas de perros y Anaplasma platys en muestras de sangre de perros de Costa Rica mediante la técnica de PCR
Fecha
2008-02
Autores
Ábrego Sanchez, Leyda E.
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ISSN de la revista
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Editor
Universidad Nacional, Costa Rica
Resumen
En el primer estudio se analizaron 165 garrapatas provenientes de 165 perros que
asistieron a diferentes clínicas veterinarias de Costa Rica. Se identificaron 160
Rhipicephalus sanguineus, 4 Amblyomma ovale y 1 Ixodes boliviensis. Ehrlichia canis y
Anaplasma platys fueron detectados por PCR en 43 (26.06%) y 5 (3.03%) garrapatas R.
sanguineus respectivamente, siendo éste el primer reporte de la presencia de estos agentes
en garrapatas de Costa Rica. Dos garrapatas presentaron infecciones mixtas con E. canis y
A. platys. Una garrapata positiva para cada uno de estos agentes fue secuenciada,
encontrando una similitud de 99% para E. canis y de 98% para A. platys. No se detectó la
presencia de Ehrlichia chaffeensis y Ehrlichia ewingii en ninguna de las garrapatas
analizadas. El análisis de regresión logística no reveló asociación con el sexo de la
garrapata, la cantidad de garrapatas, la época de colecta, la raza y la edad del perro del cual
se recolectaron las garrapatas con la presencia de E. canis y A. platys.
En el segundo estudio se analizaron 300 muestras sanguíneas provenientes de perros
sospechosos de ehrlichiosis o trombocitopenia infecciosa cíclica atendidos en clínicas
veterinarias mediante PCR. Un total de 19 (6.33%) muestras resultaron positivas a A.
platys. Este hallazgo representa el primer reporte de la detección de A. platys en caninos en
diferentes áreas geográficas (San José, Heredia, Alajuela, Cartago y Guanacaste) de Costa
Rica. En 7 muestras caninas se encontró además infección mixta (A. platys y E. canis).
Una muestra sanguínea positiva a A. platys fue secuenciada mostrando una similitud del
100%. No se determinó efecto significativo de las variables cualitativas (raza, sexo y edad
del perro, ubicación de la clínica veterinaria y época de colecta de la muestra) y
cuantitativas resultado del hemograma (hematocrito, hemoglobina, leucocitos, linfocitos y
número de segmentados) sobre la presencia de A. platys.
In the first study, 165 ticks from 165 dogs attending different veterinary clinics in Costa Rica were analyzed. A total of 160 Rhipicephalus sanguineus, 4 Amblyomma ovale and 1 Ixodes boliviensis were identified. Ehrlichia canis and Anaplasma platys were detected by PCR in 43 (26.06%) and 5 (3.03%) R. sanguineus ticks respectively, being this the first report of the presence of these agents in ticks from Costa Rica. Two ticks presented mixed infections with E. canis and A. platys. One tick positive for each of these agents was sequenced, finding a 99% similarity for E. canis and 98% similarity for A. platys. The presence of Ehrlichia chaffeensis and Ehrlichia ewingii was not detected in any of the ticks tested. Logistic regression analysis revealed no association of tick sex, number of ticks, time of collection, breed, and age of the dog from which ticks were collected with the presence of E. canis and A. platys. In the second study, 300 blood samples from dogs suspected of ehrlichiosis or cyclic infectious thrombocytopenia seen in veterinary clinics were analyzed by PCR. A total of 19 (6.33%) samples were positive for A. platys. This finding represents the first report of the detection of A. platys in canines in different geographical areas (San José, Heredia, Alajuela, Cartago and Guanacaste) of Costa Rica. Mixed infection (A. platys and E. canis) was also found in 7 canine samples. One blood sample positive for A. platys was sequenced showing 100% similarity. No significant effect of qualitative variables (breed, sex and age of the dog, location of the veterinary clinic and time of sample collection) and quantitative variables (hematocrit, hemoglobin, leukocytes, lymphocytes and number of segmented cells) on the presence of A. platys was determined.
In the first study, 165 ticks from 165 dogs attending different veterinary clinics in Costa Rica were analyzed. A total of 160 Rhipicephalus sanguineus, 4 Amblyomma ovale and 1 Ixodes boliviensis were identified. Ehrlichia canis and Anaplasma platys were detected by PCR in 43 (26.06%) and 5 (3.03%) R. sanguineus ticks respectively, being this the first report of the presence of these agents in ticks from Costa Rica. Two ticks presented mixed infections with E. canis and A. platys. One tick positive for each of these agents was sequenced, finding a 99% similarity for E. canis and 98% similarity for A. platys. The presence of Ehrlichia chaffeensis and Ehrlichia ewingii was not detected in any of the ticks tested. Logistic regression analysis revealed no association of tick sex, number of ticks, time of collection, breed, and age of the dog from which ticks were collected with the presence of E. canis and A. platys. In the second study, 300 blood samples from dogs suspected of ehrlichiosis or cyclic infectious thrombocytopenia seen in veterinary clinics were analyzed by PCR. A total of 19 (6.33%) samples were positive for A. platys. This finding represents the first report of the detection of A. platys in canines in different geographical areas (San José, Heredia, Alajuela, Cartago and Guanacaste) of Costa Rica. Mixed infection (A. platys and E. canis) was also found in 7 canine samples. One blood sample positive for A. platys was sequenced showing 100% similarity. No significant effect of qualitative variables (breed, sex and age of the dog, location of the veterinary clinic and time of sample collection) and quantitative variables (hematocrit, hemoglobin, leukocytes, lymphocytes and number of segmented cells) on the presence of A. platys was determined.
Descripción
Maestría en Enfermedades Tropicales.
Palabras clave
REACCION DE CADENA DE LA POLIMERASA, PERRO, DOG, ENFERMEDADES CANINAS, TECNICAS INMUNOLOGICAS, BIOLOGIA MOLECULAR, CANINE DISEASES, IMMUNOLOGICAL TECHNIQUES, MOLECULAR BIOLOGY, COSTA RICA