| restriction endonuclease fingerprinting analysis of canadian isolates of aeromonas salmonicida. | restriction endonuclease fingerprinting (ref) analysis was used to examine total cellular dna prepared from 56 independent field isolates of the fish pathogen, aeromonas salmonicida. dna was digested singly with the restriction enzymes ecori and hindiii, and the resulting fragments separated by polyacrylamide gel electrophoresis and visualized by silver staining. the ref patterns of typical isolates of a. salmonicida subsp. salmonicida were distinct from those of a. hydrophila, a. salmonicida su ... | 1990 | 2159364 |
| herd-level test performance based on uncertain estimates of individual test performance, individual true prevalence and herd true prevalence. | a generalized model was derived for understanding the performance of herd-testing protocols when there is uncertainty and variability in individual-level sensitivity, specificity, prevalence of infection within infected herds, and prevalence of infected herds in the population. the model uses monte-carlo techniques to provide estimates of test performance for a dichotomous classification of herd-disease status. uncertainty and variability in input assumptions are described using empirical and pa ... | 1998 | 9785375 |
| appeal board denies public health insurance coverage to immigrants on minister's permits. | in a decision released in august 1999, the health services appeal board in ontario upheld the decision to deny provincial health coverage to an hiv-positive woman who had been denied permanent resident status on the basis of "medical inadmissibility" but was living in canada on an immigration minister's permit issued on "humanitarian and compassionate grounds." | 1999 | 11868551 |
| [brazilian migration to north america]. | "this article is a comparative study of brazilian immigration to canada and the united states. analyses of recently collected data, in toronto, ontario, as well as in a medium sized u.s. community permit this study to examine the adaptation and adjustment experiences of a new group of immigrants to north america. this article begins with a discussion of the origins of this recent immigrant group, and its rapid expansion. next, this study focuses on the labor force activities of brazilian immi ... | 1992 | 12286239 |
| cytoplasmic membrane fluidity and fatty acid composition of acidithiobacillus ferrooxidans in response to ph stress. | strain variation in the acidophile acidithiobacillus ferrooxidans was examined as a product of membrane adaptation in response to ph stress. we tested the effects of sub and supra-optimal ph in two type strains and four strains isolated from acid mine drainage water around sudbury, ontario, canada. growth rate, membrane fluidity and phase, determined from the fluorescence polarization of 1,6-diphenyl-1,3,5-hexatriene, and fatty acid profiles were compared. the effect of ph 1.5 was the most prono ... | 2010 | 20582711 |
| the ontario universal typing of tuberculosis (out-tb) surveillance program--what it means to you. | tuberculosis (tb) is a serious disease that is transmitted primarily by the airborne route. effective disease control and outbreak management requires the timely diagnosis, isolation and treatment of infected individuals with active disease; contact tracing to identify secondary cases likely to benefit from treatment of latent infection; and laboratory identification or confirmation of epidemiologically linked cases. tb genotyping enables the comparison of mycobacterium tuberculosis complex (mtb ... | 2010 | 20617215 |
| Prevalence of Nosema sp. (Microsporidia: Nosematidae) during an outbreak of the jack pine budworm in Ontario. | Microsporidia are believed to play little or no role in outbreaks of the jack pine budworm, Choristoneura pinuspinus Freeman (Lepidoptrera: Tortricidae), because the short duration (2-4 years) of those outbreaks may not permit significant build-up of the pathogen. We conducted the first survey of Nosema sp. (Microsporidia: Nosematidae) over the course of a recent jack pine budworm outbreak in Ontario. Between 2004 and 2010 the outbreak defoliated a cumulative total of 1.78 million ha. Microscopi ... | 2011 | 21925185 |
| the happy meal® effect: the impact of toy premiums on healthy eating among children in ontario, canada. | "toy premiums", offered with mcdonald's happy meals®, are a prominent form of food marketing directed at children. two california jurisdictions recently implemented policies that only permit offering fast-food toy premiums with meals that meet certain nutritional criteria. the primary objective of the current study was to examine elements of this policy in a canadian context and determine if children select healthier food products if toy premiums are only offered with healthier food options. the ... | 2012 | 23618634 |
| the moral costs of the ontario physicians' strike. | in a strike to permit extra billing, physicians in ontario, canada, sought to balance their concerns for professional autonomy with their primary call to beneficence. but the right to reasonable compensation within a nationalized health care system is not on the same moral plane as the public's right to health care. having failed to convince either the provincial government or the public of the soundness of their position, ontario's doctors must now repair the damage done to the relationship wit ... | 2013 | 3667243 |
| silica flour exposures in ontario. | a total of 16 cases of silicosis are reported in ontario plants where there was exposure to silica flour. dust counts expressed as mppcf are shown for four of these plants taken over a period of 37 years. a relationship has been obtained experimentally to permit conversion of the counts to respirable mass concentrations. based on the information obtained, a tlv of 0.05 mg/m3 for silica flour is proposed. | 1992 | 206125 |
| a database coding system for vascular procedures. | a coding system was developed to overcome the difficulties encountered in data registry and retrieval from a national audit. in vascular surgery operations are frequently combined, and neither the ohip fee schedule of codes (ontario, canada) nor the icd-9 system provides sufficient detail for most vascular surgeons to retrieve information for long-term follow-up. however, some wish to record minimal data on their operative procedures. a numeric classification system was developed. a five-digit n ... | 2007 | 1770848 |
| detection of leptospira spp. in wildlife reservoir hosts in ontario through comparison of immunohistochemical and polymerase chain reaction genotyping methods. | a total of 460 kidney samples from wildlife (beavers, coyotes, deer, foxes, opossums, otters, raccoons, skunks) were obtained from road-kill and hunter/trapper donations in ontario between january 2010 and november 2012. the objectives of the study were to detect leptospira spp. by immunohistochemistry and polymerase chain reaction (pcr), to map presence of leptospires in wildlife relative to livestock and human populations, and to characterize positive samples by sequencing and comparison to le ... | 2014 | 24587507 |
| phylogenetic incongruence in e. coli o104: understanding the evolutionary relationships of emerging pathogens in the face of homologous recombination. | escherichia coli o104:h4 was identified as an emerging pathogen during the spring and summer of 2011 and was responsible for a widespread outbreak that resulted in the deaths of 50 people and sickened over 4075. traditional phenotypic and genotypic assays, such as serotyping, pulsed field gel electrophoresis (pfge), and multilocus sequence typing (mlst), permit identification and classification of bacterial pathogens, but cannot accurately resolve relationships among genotypically similar but pa ... | 2012 | 22493677 |
| in vivo quantification of bone-fluorine by delayed neutron activation analysis: a pilot study of hand-bone-fluorine levels in a canadian population. | humans can be exposed to fluorine (f) through their diet, occupation, environment and oral dental care products. fluorine, at proper dosages, is believed to have positive effects by reducing the incidence of dental caries, but fluorine toxicity can occur when people are exposed to excessive quantities of fluorine. in this paper we present the results of a small pilot in vivo study on 33 participants living in southwestern ontario, canada. the mean age of participants was 45 ± 18 years with a ran ... | 2012 | 22369953 |