| the seroprevalence of coxiellosis (q fever) in ontario sheep flocks. | a serological survey for coxiella burnetii was undertaken on a randomly selected population of 103 ontario sheep flocks. twenty-two flocks had at least one positive ewe; seven flocks had two or more reactors. the positive flocks were geographically clustered northwest of guelph. crutch-clipping of the ewe's wool prior to lambing, and total confinement housing at lambing in winter and spring seemed to lower the probability of seroreactivity of the flock (p less than 0.05). the study suggests that ... | 1991 | 1884293 |
| serosurvey of coxiella burnetii infection in dairy goat herds in ontario. a comparison of two methods of enzyme-linked immunosorbent assay. | two technical variations of enzyme-linked immunosorbent assay for the detection of antibodies to coxiella burnetii were compared in this serosurvey on 20 ontario dairy goat herds. both a trichloracetic acid extract and a coctoantigen of purified coxiellas were used to sensitize the microtitration plates. technical differences related to coating ph, serum dilutions tested and interpretation of results. results agreed in 98.6% of sera examined, the differing sera were in the low titer borderline r ... | 1988 | 3349400 |
| serosurvey on the occurrence of coxiella burnetii in ontario cattle. | | 1988 | 3355970 |
| q fever: hazard from sheep used in research. | the recent recognition that q fever is endemic in ontario and the known occupational risk of q fever to research personnel working with sheep prompted a study to determine the prevalence of antibodies to the causative organism, coxiella burnetti, in animals and staff at a toronto animal research institute. of 37 sheep 34 (92%) were found to be seropositive--that is, to have a titre of complement-fixing antibody to the phase ii antigen of 1:8 or greater. of 331 staff members tested, 18% were foun ... | 1984 | 6704847 |
| coxiella burnetii (q fever) abortion storms in goat herds after attendance at an annual fair. | | 1994 | 8069841 |
| [another case of west nile fever in the netherlands: a man with encephalitis following a trip to canada]. | shortly after his return to the netherlands from a trip to ontario, a part of canada where infection with west-nile virus has been reported, a 69-year-old man became increasingly confused and generally unwell, accompanied by fever. the clinical picture was compatible with viral encephalitis and this was supported by eeg findings and the results of the cerebrospinal-fluid examination. mri of the brain did not contribute to the diagnosis. the patient was treated with aciclovir because herpes simpl ... | 2003 | 12784533 |
| the incidence of q fever among dairy herds in western ontario. | | 1960 | 13823168 |
| q fever in canada. | a canada-wide survey of q fever was begun in 1958 in co-operation with public health and veterinary laboratories to determine the presence and prevalence of the disease so that medical practitioners might be alerted to the potential dangers existing. serologic evidence obtained indicated that the q fever rickettsia now exists in cattle in all provinces of canada except new brunswick, nova scotia, and prince edward island. isolations of the rickettsia were obtained from bovine milk samples from o ... | 1964 | 14175873 |
| tuberculosis case-finding techniques in the province of ontario. | | 1949 | 18108532 |
| prevalence and risk factors for coxiella burnetii seropositivity in small ruminant veterinarians and veterinary students in ontario, canada. | coxiella burnetii is a zoonotic pathogen that causes q fever in humans. serological and questionnaire data on c. burnetii were obtained from 32 small ruminant veterinarians and veterinary students in ontario, canada, in february 2012. overall, 59% of participants were seropositive; advanced stage of career and increased age were associated with seropositivity. | 2017 | 28373734 |
| coxiella burnetii (q fever) seropositivity and associated risk factors in sheep and goat farm workers in ontario, canada. | coxiella burnetii is a zoonotic bacterium that causes q fever, a potentially severe disease of humans. the objectives of this study were to determine the seroprevalence and risk factors for c. burnetii exposure in sheep and goat farm workers in ontario, canada. between august 2010 and march 2012, 172 farm workers from 78 sheep and goat farms were surveyed regarding demographics, lifestyle, farm practices, and medical history. sera from these people were collected and analyzed for q fever titers ... | 2016 | 27585364 |
| prevalence of rickettsia species in dermacentor variabilis ticks from ontario, canada. | relatively little is known about the prevalence of rickettsial species in dermacentor ticks in eastern canada. in this study, dermacentor ticks from the province of ontario, canada, were tested for the presence of spotted fever group rickettsial (sfgr) species, coxiella burnetii and francisella tularensis. rickettsia rickettsii was not detected in any ticks tested, but r. montanensis was detected at a prevalence of 2.2% in d. variabilis (17/778). two other sfgr species, r. parkeri and candidatus ... | 2016 | 27318438 |
| coxiella burnetii seropositivity and associated risk factors in sheep in ontario, canada. | coxiella burnetii is a zoonotic bacterium that can cause abortion in sheep in late gestation, as well as the delivery of stillborn, and non-viable lambs (rodolakis, 2006). a cross-sectional study was conducted in ontario, canada, to investigate c. burnetii exposure in sheep. between august 2010 and january 2012, sera from 2363 reproductively active ewes from 72 farms were tested for c. burnetii specific antibodies using the chekit q fever elisa test kit (idexx laboratories). overall, exposure wa ... | 2015 | 26376066 |
| coxiella burnetii seropositivity and associated risk factors in goats in ontario, canada. | coxiella burnetii is a zoonotic bacterium, and infection in goats with this bacterium can result in abortion, stillbirth or birth of non-viable kids. a cross-sectional study was conducted to identify the seroprevalence and risk factors for c. burnetii exposure in ontario goats. sera were collected between august 2010 and february 2012, and tested for c. burnetii specific antibodies using an enzyme-linked immunosorbent assay (idexx). overall, 63.2% (48/76, 95% ci=51.9-73.4) of farms had one or mo ... | 2015 | 26231909 |
| q fever, 1982-1986--ontario. | | 1988 | 3266574 |
| q fever infections in an ontario family. | | 1960 | 13774092 |