| the prevalence and epidemiology of toxoplasmosis in ontario. | the results of testing 7060 human serum specimens obtained in the province of ontario, canada, were analysed for the presence of antibodies to toxoplasma gondii. of these samples 38% were serologically positive at a titre of 1/16 or greater. the age-specific rates climbed from 2.7% in infants between 6 months and 1 year of age, to about 50% in individuals aged 25 years or over. variations in prevalence were noted between different areas within the province and evidence is put forward to show tha ... | 1977 | 265346 |
| the prevalence of serum antibodies to toxoplasma gondii in ontario mammals. | the prevalence of seropositive reactions to toxoplasma gondii was studied in farm animals, companion animals, wild rodents and birds. of the animals tested, 17% of cattle, 65% of sheep, 45% of pigs, 9% of horses, 33% of dogs and 20% of cats were seropositive by the sabin-feldman dye test. in addition 11% of mice (mus musculus), 5% of deer mice (peromyscus), 3% of rats (rattus norvegicus) and less than 2% of sparrows (passer domestcus) were seropositive. all samples from short-tailed field mice ( ... | 1978 | 667705 |
| seroprevalence of toxoplasma gondii infection among veterinary staff in ontario, canada (2002): implications for teratogenic risk. | toxoplasma gondii infection is embryotoxic in humans. it is mainly transmitted through raw/undercooked meat and ingestion of oocysts in cat feces. there remains controversy about the actual risk of cats transmitting the disease to humans. our primary objective was to determine the seroprevalence of t. gondii antibody among veterinary staff, to ascertain whether they have an increased risk through occupational exposure. our secondary objective was to examine their practices regarding cats, toxopl ... | 2003 | 12769831 |
| the prevalence of antibodies against toxoplasma gondii in some ontario mammals. | a survey of serum samples from mammals trapped in central ontario showed that many contained antibodies to toxoplasma gondii. the prevalence of infection as reflected by positive reactions in the sabin-feldman dye test appeared to be related to the type of diet of each species examined, and specifically, to the proportion of rodents in the diet. of the fox blood samples tested, 84% were positive. the percentage of positive samples diminished through, coyote, mink, bear, fisher skunk, raccoon, ma ... | 1976 | 16498870 |
| toxoplasmosis: a serological survey in ontario wildlife. | sera from seven species of wild animals in ontario were examined for antibody to toxoplasma gondii using the sabin-feldman dye test. of 158 sera tested, 53% of the red foxes (vulpes vulpes), 56% of the striped skunks (mephitis mephitis), 78% of the coyotes (canis latrans), 33% of the black bears (ursus americanus), 18% of the short tailed shrews (blarina brevicauda) and none of the field voles (microtus pennsylvanicus) had antibody. antibody to t. gondii was present in sera from wild animals cap ... | 1976 | 16502687 |
| pig and herd level prevalence of toxoplasma gondii in ontario finisher pigs in 2001, 2003, and 2004. | the objective of this study was to estimate the apparent and true prevalence of exposure to toxoplasma gondii in ontario finisher pigs. during the study period (2001 to 2004), sera from 6048 pigs were tested with a commercial enzyme-linked immunosorbent assay (elisa); 103 farms were included 1 to 3 times in the study. true prevalence was estimated using a bayesian approach. apparent prevalence at the pig level was 1.59% [95% confidence interval (ci): 0.45, 2.99] in 2001, 0.06% (95% ci: 0.00, 0.4 ... | 2008 | 18783018 |