RESUMEN
Two hundred fifty-five lynx (Felis lynx) carcasses were collected from trappers in Interior Alaska (USA). Serosanguinous fluids were collected from the chest cavity of each carcass. These fluids were tested for evidence of exposure to Toxoplasma gondii by means of a modified agglutination test using formalin fixed tachyzoites and mercaptoethanol. Thirty-nine of the samples had titers greater than or equal to the threshold (> or = 25). Antibody prevalence differed between areas, and was directly related to age of the host.
Asunto(s)
Carnívoros/parasitología , Toxoplasma/aislamiento & purificación , Pruebas de Aglutinación/veterinaria , Alaska , Animales , Anticuerpos Antiprotozoarios/análisis , Femenino , Formaldehído , Masculino , Mercaptoetanol , Estudios Seroepidemiológicos , Toxoplasma/inmunologíaRESUMEN
Wolves (Canis lupus) were captured in three areas of Interior Alaska (USA). Four hundred twenty-five sera were tested for evidence of exposure to canine coronavirus by means of an indirect fluorescent antibody procedure. Serum antibody prevalence averaged 70% (167/240) during the spring collection period and 25% (46/185) during the autumn collection period. Prevalence was 0% (0/42) in the autumn pup cohort (age 4-5 mo), and 60% (58/97) in the spring pup cohort (age 9-10 mo). Prevalence was lowest in the Eastern Interior study area. A statistical model indicates that prevalence increased slightly each year in all three study areas. These results indicate that transmission occurs primarily during the winter months, antibody decay is quite rapid, and reexposure during the summer is rare.
Asunto(s)
Anticuerpos Antivirales/sangre , Infecciones por Coronavirus/veterinaria , Coronavirus Canino/inmunología , Lobos , Alaska/epidemiología , Animales , Estudios de Cohortes , Infecciones por Coronavirus/sangre , Infecciones por Coronavirus/epidemiología , Femenino , Técnica del Anticuerpo Fluorescente Indirecta/veterinaria , Masculino , Estaciones del Año , Estudios SeroepidemiológicosRESUMEN
Tongue samples were collected from 148 wolf (Canis lupus) carcasses during 1993 and 1994 near Fairbanks (Alaska, USA). A standard peptic digestion procedure was used to detect Trichinella sp. larvae. Larvae were found in 54 of 148 (36%) samples. There was no significant difference in sex-specific prevalence. Prevalence was significantly related to age. There was no relationship between the number of larvae/g of host tissue and the age or sex of the host. Trichinella spp. infection may cause illness in individual wolves. However, there was no indication the parasite had any impact on the population.