An exploratory spatial contaminant assessment for polar bear (Ursus maritimus) liver, fat, and muscle from northern Canada.

Since the industrial era, chemicals have been ubiquitous in worldwide ecosystems. Despite the discontinued release of highly toxic persistent organic pollutants (POPs) in the environment, the levels of some POPs are still being measured in the Canadian Arctic. These contaminants are of great concern due to their persistence, toxicity, and levels of bioaccumulation in food chains. Animals occupying top trophic positions in the Canadian Arctic, particularly polar bears, are exposed to these contaminants mainly through their diet. Our study investigated the levels of 30 metals (including total and methyl mercury) alkaline and alkaline earth metals, 15 polycyclic aromatic compounds and their alkyl congeners (PACs), 6 chlordanes (CHLs), and 20 polychlorinated biphenyls (PCBs), in 49 polar bears from the Canadian Arctic. Contaminant burden was measured in liver, muscle, and fat in bears of different sex, age, and locations. A principal component analysis did not distinguish differences between age and sex profiles for most contaminants. However, the concentrations measured and their distribution in the tissues confirm findings observed in past studies. This study highlights the importance of continual monitoring of polar bear health (e.g., newly detected PACs were measured within this study) and evaluating those impacts for the next generations of polar bears.

Multi-pathogen serological survey of migratory caribou herds: A snapshot in time.

Pathogens can impact host survival, fecundity, and population dynamics even when no obvious disease is observed. Few baseline data on pathogen prevalence and diversity of caribou are available, which hampers our ability to track changes over time and evaluate impacts on caribou health. Archived blood samples collected from ten migratory caribou herds in Canada and two in Greenland were used to test for exposure to pathogens that have the potential to effect population productivity, are zoonotic or are emerging. Relationships between seroprevalence and individual, population, and other health parameters were also examined. For adult caribou, the highest overall seroprevalence was for alphaherpesvirus (49%, n = 722), pestivirus (49%, n = 572) and Neospora caninum (27%, n = 452). Lower seroprevalence was found for parainfluenza virus type 3 (9%, n = 708), Brucella suis (2%, n = 758), and Toxoplasma gondii (2%, n = 706). No animal tested positive for antibodies against West Nile virus (n = 418) or bovine respiratory syncytial virus (n = 417). This extensive multi-pathogen survey of migratory caribou herds provides evidence that caribou are exposed to pathogens that may have impacts on herd health and revealed potential interactions between pathogens as well as geographical differences in pathogen exposure that could be linked to the bio-geographical history of caribou. Caribou are a keystone species and the socio-economic cornerstone of many indigenous cultures across the North. The results from this study highlight the urgent need for a better understanding of pathogen diversity and the impact of pathogens on caribou health.

Perceptions of primary healthcare services among people with physical disabilities - part 1: access issues.

BACKGROUND: Access to primary healthcare among people with physical disabilities has been a neglected research area in Canada. The authors sought to examine the extent of access to and satisfaction with primary healthcare services for people with physical disabilities living in Canada's largest metropolitan area -- the Toronto region. METHODS: An anonymous self-report questionnaire regarding access to and perceived quality of primary healthcare was mailed to a convenience sample of 1026 members of several disability organizations as well as persons discharged from a rehabilitation hospital within the past 2 years. For the 201 returned surveys (response rate = 20%), the authors evaluated the perceived extent of access to primary healthcare services as well as the level of satisfaction with the quality of these services. RESULTS: Among the respondents to the questionnaire, 17.4% reported having difficulty obtaining a family doctor's services and 8.0% reported having been refused medical treatment by a family doctor because of their disability. Respondents also reported difficulty in physically accessing their family doctor's office (32.3%), equipment (38.3%), and washroom (22.9%). Although 82.1% of respondents claimed they were very or somewhat satisfied with their family doctor's services, 19.4% felt they were receiving inadequate primary healthcare and 21.9% felt that their disability prevented them from receiving appropriate primary healthcare. DISCUSSION: Although people who experienced more difficulties may have been more likely to respond to this survey, a significant proportion of people with physical disabilities feel they are experiencing difficulty accessing adequate and appropriate primary healthcare services. Possible solutions to some of the identified access barriers and areas where further research may be required are described.

Perceptions of primary healthcare services among persons with physical disabilities - part 2: quality issues.

BACKGROUND: The ability of persons with disabilities to access quality primary care in Canada is not well documented. This article reports on the perceived quality of primary care received by persons with disabilities by looking at utilization of elements of the health maintenance examination, referrals, health promotion, healthcare provider role clarification, and satisfaction. METHODS: A sample of convenience was undertaken whereby an anonymous self-report questionnaire, which included the Short Form-36 Health Survey, was mailed to members of several Canadian disability organizations and persons discharged within the last 2 years from a rehabilitation hospital. The Statistical Package for the Social Sciences was used to analyze the data. RESULTS: A total of 201 individuals (20% response rate) completed and returned the surveys, 61.2% of whom were women. Some elements of the health maintenance examination, including Pap tests, mammogram referral, and measurement of blood pressure (BP), were not markedly different from population census data. Inquiry around health promotion was low, as 61.7% of our sample did not receive a functional assessment, 58.2% were not asked about emotions, and only 10% were asked about physical or sexual violence. Diet, exercise, smoking, pain, sleep, alcohol, sex, sexually transmitted diseases (STDs), and reproductive choices were discussed in varying degrees. INTERPRETATION: Among respondents in our survey, disabled women were able to access important screening tests. Health promotion services, however, were often not offered. The particular healthcare needs of disabled women and men -- eg, having a condition that may be progressive, being at increased risk of secondary disability and the added effects of aging -- may be addressed more effectively by including health promotion. It is proposed that functional assessment, emotional inquiry, and role clarification could improve the delivery of health promotion and the perceived quality of care received.