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Factors affecting retirement migration to Idaho: an adaptation of the amenity retirement migration model.

The purpose of this study was to determine factors affecting retirement migration of older persons, using Haas and Serow's (1993) model as the framework. Data were based on 462 persons aged 50 and older who had migrated to Idaho and surrendered their out-of-state drivers' licenses during 1992 and 1993. Most moved from another state in the west and were motivated to move to Idaho by such factors as outdoor recreation and quality and pace of life. They had visited their new community at least five times before moving and developed social ties quickly upon arriving. Businesses and community planners can more effectively anticipate changes necessary to accommodate older migrants to their community.

Aged↗

An evaluation of 222Rn concentrations in Idaho groundwater.

Factors potentially correlated with 222Rn concentrations in groundwater were evaluated using a database compiled by the U.S. Geological Survey. These included chemical and radiological factors, and both well depth and discharge rate. The 222Rn concentrations contained within this database were examined as a function of latitude and longitude. It was observed that the U.S. Geological Survey sample locations for 222Rn were not uniformly distributed throughout the state. Hence, additional samples were collected in southeastern Idaho, a region where few 222Rn in water analyses had been performed. 222Rn concentrations in groundwater, in Idaho, were found using ANOVA (alpha = 0.05) to be independent of the chemical, radiological, and well parameters thus far examined. This lack of correlation with other water quality and well parameters is consistent with findings in other geographical locations. It was observed that an inverse relationship between radon concentration and water hardness may exist.

Fresh Water↗

Local health districts and the public health workforce: a case study of Wyoming and Idaho.

This study of personnel in local health departments (LHDs) focused on two predominantly rural states: Idaho and Wyoming. Although in the same region of the country, the structure of local public health is different in each state. Idaho's regionalized LHDs are relatively autonomous, whereas Wyoming's are county based, with many public health functions retained at the state level. The majority of professionals are nurses followed by environmental health workers and sanitarians, similar to data reported nationally. With increased emphasis on core public health functions of policy, assurance, and assessment, rural LHDs will be challenged to redirect the functions of their workforce.

Idaho↗

Accounting for coalescent stochasticity in testing phylogeographical hypotheses: modelling Pleistocene population structure in the Idaho giant salamander Dicamptodon aterrimus.

Several theoretical studies have demonstrated the importance of accounting for coalescent stochasticity in phylogeographical studies, however, there are few empirical examples that do so in the context of explicit hypothesis testing. Here, we provide an example from the Idaho giant salamander (Dicamptodon aterrimus) using 118 mtDNA sequences, nearly 2 kb in length. This species is endemic to mesic forests in northern and central Idaho, and several a priori hypotheses have been erected based both on palaeoclimatic grounds and from phylogeographical studies of codistributed amphibians. Phylogenetic analysis of the D. aterrimus data suggests an expansion from a single refugium south of the Salmon River, whereas the inference from nested clade analysis is one of expansion from a single refugium in the Clearwater drainage. Explicit testing of these hypotheses, using geographically structured coalescent simulations to erect null distributions, indicates we can reject expansion from the Clearwater drainage (pCLW = 0.089), but not expansion from the South Fork of the Salmon drainage (pSAL = 0.329). Furthermore, data from codistributed amphibians suggest that there may have been two refugia, and an amova shows that most of the molecular variance partitioned between the Clearwater and the Salmon drainages (54.40%; P < 0.001) and within drainages (43.61%; P < 0.001). As a result, we also tested three a priori hypotheses which predicted that both the Clearwater and Salmon drainages functioned as refugia during the late Pleistocene; we could reject (PCORD = 0.019) divergence dates during the Cordilleran glacial maxima [c. 20 000 years before present (ybp)], during the Sangamon interglacial (c. 35 000 ybp; pSANG = 0.032), as well as pre-Pleistocene divergence (c. 1.7 Ma; ppP < 0.001). Mismatch distributions and Tajima's D within the individual drainages provide further support to recent population expansion. This work demonstrates coalescent stochasticity is an important phenomenon to consider in testing phylogeographical hypotheses, and suggests that analytical methods which fail to sufficiently quantify this uncertainty can lead to false confidence in the conclusions drawn from these methods.

Animals↗

Abortions in rural Idaho: physicians' attitudes and practices.

This study surveyed all family physicians, obstetrician-gynecologists, and general surgeons practicing in rural Idaho in 1994. Although most respondents provided a wide range of reproductive health services, less than 4% performed abortions, so most rural Idaho women wanting abortions must travel long distances for this procedure. Physicians report that they do not provide abortion services because of both their own moral objections and local community opposition to the procedure. Yet 26% of the respondents indicated interest in using RU-486 for abortions when it becomes available. This suggests that the development of acceptable medical abortifacients may improve access to this procedure even in very conservative rural areas.

Abortifacient Agents, Steroidal↗

Coordinated response to reports of possible anthrax contamination, Idaho, 2001.

In 2001, the intentional release of anthrax spores in the eastern United States increased concern about exposure to anthrax nationwide, and residents of Idaho sought assistance. Response from state and local agencies was required, increasing the strain on epidemiologists, laboratorians, and communications personnel. In late 2001, Idaho's public health communications system handled 133 calls about suspicious powders. For each call, a multiagency bridge call was established, and participants (public health officials, epidemiologists, police, Federal Bureau of Investigation personnel, hazardous materials officials, and others) determined which samples would be tested by the state public health laboratory. A triage system for calls helped relieve the burden on public safety and health systems.

Anthrax↗

Biology of Cuterebra lepusculi Townsend (Diptera: Cuterebridae) in cottontail rabbits in Idaho.

Cuterebra lepusculi Townsend parasitize cottontail rabbits (Sylvilagus nuttallii) in southern Idaho. Peak parasitism was 69% in mid-September. Mean development time in the host was 27 days. The species is univoltine in Idaho. Partially developed larvae were transferred from freshly killed to living hosts and the resulting larvae matured normally. Developing pupae were cooled or warmed to retard or speed development and synchronize adult emergence.

Animals↗

Approval and promulgation of Hospital/Medical/Infectious Waste Incinerators: State Plan for designated facilities and pollutants: Idaho. Environmental Protection Agency (EPA). Direct final rule.

EPA is approving the State of Idaho's section 111(d) State Plan for controlling emissions from existing Hospital/Medical/Infectious Waste Incinerators (HMIWI). The plan was submitted on December 16, 1999, to fulfill the requirements of sections 111(d) and 129 of the Clean Air Act. The State Plan adopts and implements the Emissions Guidelines applicable to existing HMIWIs, and establishes emission limits and controls for sources constructed on or before June 20, 1996. EPA has determined that Idaho's State Plan meets CAA requirements and hereby approves this State Plan, thus making it federally enforceable.

Air Pollution↗

Regulation of physicians' office laboratories. The Idaho experience.

Timely availability of reliable test results enhances the office practitioner's ability to provide high-quality care that is personally satisfying to patients. Modern technology allows physicians to have such timely information available through test analyses performed in an office laboratory. Studies of physicians' office laboratories in Idaho found the performance, initially, to be unacceptably variable for many hematology, urinalysis, clinical chemistry, and microbiology tests. State regulation, requiring each office laboratory to comply with quality assurance guidelines and to participate in a proficiency testing program, resulted in a marked improvement in the proficiency level of office laboratory testing in Idaho. With the increasing dispersion of clinical laboratory technology, it is essential that standards of practice for the office laboratory be developed that ensure, within reasonable limits, the reliability of test information used in patient care. If widespread acceptance of such standards cannot be developed with a voluntary approach, states should consider regulation of office laboratories within their jurisdiction. Compliance with standards of practice, voluntarily or as a result of regulation, should promote quality performance in the office laboratory and allow the physician to use confidently the timely test information in dealing with diagnostic and management problems in patient care.

Facility Regulation and Control↗

Shigella sonnei outbreak associated with contaminated drinking water--Island Park, Idaho, August 1995.

On August 20, 1995, the District 7 Health Department requested the Idaho Department of Health to assist in investigating reports of diarrheal illness among visitors to a resort in Island Park in eastern Idaho; Shigella sonnei had been isolated from stool cultures of some cases. This report summarizes the findings of the investigation, which implicated contaminated drinking water as the cause of the outbreak.

Adolescent↗

Risk perception, future land use and stewardship: comparison of attitudes about Hanford Site and Idaho National Engineering and Environmental Laboratory.

With the ending of the Cold War, the Department of Energy (DOE) is evaluating mission, future land use and stewardship of departmental facilities. This paper compares the environmental concerns and future use preferences of 351 people interviewed at Lewiston, Idaho, about the Hanford Site and Idaho National Engineering and Environmental Laboratory (INEEL), two of DOE's largest sites. Although most subjects lived closer to Hanford than INEEL, most resided in the same state as INEEL. Therefore their economic interests might be more closely allied with INEEL, while their health concerns might be more related to Hanford. Few lived close enough to either site to be directly affected economically. We test the null hypotheses that there are no differences in environmental concerns and future land-use preferences as a function of DOE site, sex, age and education. When asked to list their major concerns about the sites, more people listed human health and safety, and environmental concerns about Hanford compared to INEEL. When asked to list their preferred future land uses, 49% of subjects did not have any for INEEL, whereas only 35% did not know for Hanford. The highest preferred land uses for both sites were as a National Environmental Research Park (NERP), and for camping, hunting, hiking, and fishing. Except for returning the land to the tribes and increased nuclear storage, subjects rated all future uses as more preferred at INEEL than Hanford. Taken together, these data suggest that the people interviewed know more about Hanford, are more concerned about Hanford, rate recreational uses and NERP as their highest preferred land use, and feel that INEEL is more suited for most land uses than Handford. Overall rankings for future land uses were remarkably similar between the sites, indicating that for these stakeholders, DOE lands should be preserved for research and recreation. These preferences should be taken into account when planning for long-term stewardship at these two DOE sites.

Adult↗

Effects of Military Training Activities on Shrub-steppe Raptors in Southwestern Idaho, USA.

/ Between 1991 and 1994, we assessed relative abundance, nesting success, and distribution of ferruginous hawks (Buteo regalis), northern harriers (Circus cyaneus), burrowing owls (Athene cunicularia), and short-eared owls (Asio flammeus) inside and outside a military training site in the Snake River Birds of Prey National Conservation Area, southwestern Idaho. The Orchard Training Area is used primarily for armored vehicle training and artillery firing by the Idaho Army National Guard. Relative abundance of nesting pairs inside and outside the training site was not significantly different from 1991 to 1993 but was significantly higher on the training site in 1994 (P &le 0.03). Nesting success varied among years but was not significantly different inside and outside the training site (P > 0.26). In 1994, short-eared owl and burrowing owl nests were significantly closer to firing ranges used early in the spring before owls laid eggs than were random points (P < 0.001). In 1993, distances from occupied burrowing owl nests to firing ranges used early in the year were similar to those from random points to the same firing ranges (P = 0.16). Military activity contributed to some nesting failures from 1992 to 1994, but some pairs nested successfully near military activity. KEY WORDS: Distribution; Military impacts; Nesting success; Raptors; Relative abundance; Shrub-steppe

Journal Article↗

American Indians, hunting and fishing rates, risk, and the Idaho National Engineering and Environmental Laboratory.

Hunting, fishing, and recreational rates of 276 American Indians attending a festival at Fort Hall, near the Idaho National Engineering and Environmental Laboratory (INEEL), were examined. Nearly half of the sample lived on the Fort Hall Reservation, and half were American Indians from elsewhere in the western United States. An additional 44 White people attending the festival were also interviewed. The hypothesis that there are differences in hunting, fishing, and recreational rates as a function of tribal affiliation, educational level, gender, and age was examined. Information on hunting and fishing rates are central for understanding potential exposure scenarios for American Indians if the Department of Energy's INEEL lands are ever opened to pubic access, and the data are important because of the existence of tribal treaties that govern the legal and cultural rights of the Shoshone-Bannock regarding INEEL lands. Variations in hunting, fishing, and photography rates were explained by tribal affiliation (except fishing), gender, age, and schooling. Hunting rates were significantly higher for Indians (both those living on Fort Hall and others) than Whites. Men engaged in significantly higher rates of outdoor activities than women (except for photography). Potential and current hunting and fishing on and adjacent to INEEL was more similar among the local Whites and Fort Hall Indians than between these two groups and other American Indians.

Adult↗

Pesticide and PCB residues in the upper Snake River ecosystem, Southeastern Idaho, following the collapse of the Teton dam 1976.

The Teton Dam in Southeastern Idaho collapsed on June 5, 1976. The resulting flood damaged a large area and caused the release of toxicants into the Snake River. A pesticide recovery team in a helicopter worked the flooded area for three weeks and collected 1,104 containers, about 35% of which contained toxicants. It was estimated that less than 60% of the lost pesticide containers were recovered. This paper addresses the results of a one-time sampling effort designed to determine the magnitude of the chemical contamination. Over 300 samples of fish, plankton, waterfowl, sediments, water, stream drift, aquatic plants, and soil were taken. Pesticide residues were measured as microgram/kg (ppb) wet weight, whole animal basis. Rainbow trout had as much as 1432 micrograms/kg total DDT plus analogs, 66 micrograms/kg dieldrin, and 1010 micrograms/kg PCBs. Utah suckers had up to 1420 micrograms/kg total DDT plus analogs, 32 micrograms/kg dieldrin, and 1800 micrograms/kg PCB. Rocky Mountain whitefish had as much as 2650 micrograms/kg total DDT and analogs, 30 micrograms/kg dieldrin and 1400 micrograms/kg PCBs. These PCB and DDT levels were high, approaching the 2,000 micrograms/kg FDA proposed tolerance, but were below the 5,000 micrograms/kg present tolerance. Dieldrin levels were low and organophosphates were undetectable. An undeveloped area (the Fort Hall Bottoms) showed higher levels of contaminants than did an industrialized area (the lower Portneuf River). This apparent discrepancy remains unexplained. Very little pre-flood data on a whole fish basis were available for comparison (Johnson et al 1977). However, it does not appear that any human health hazard due to pesticide levels exists in this portion of the Snake River.

Animals↗

Blood lead concentrations in waterfowl utilizing Lake Coeur d'Alene, Idaho.

The Coeur d'Alene River Basin, Lake Coeur d'Alene, and the Spokane River contain elevated heavy metal concentrations in sediment and water from historical mining and ore processing operations in the Coeur d'Alene Basin. Lead poisoning has been identified as the cause of death in hundreds of waterfowl utilizing wetlands in the floodplain of the Coeur d'Alene River, but little was known about hazards to waterfowl from heavy metal contamination in shallow bays and wetlands of Lake Coeur d'Alene. We examined lake sediment and blood lead concentrations in waterfowl utilizing Lake Coeur d'Alene, Idaho, to evaluate potential lead contamination of waterfowl utilizing the lake. We collected 56 palustrine and 102 lacustrine sediment samples and 61 mallard and 8 wood duck blood samples. Mean lead concentrations from palustrine and lacustrine sediment samples ranged from 14 to 3508 mg/kg dry weight (dw) and from 19 to 5009 mg/kg (dw), respectively. Lead concentrations in palustrine and lacustrine sediment from several Lake Coeur d'Alene bays were higher than those in lake reference areas and were higher than Bunker Hill Superfund Site target cleanup levels and suggested site-specific toxicity thresholds for swans. Mean blood lead from mallard and wood ducks sampled from Lake Coeur d'Alene bays were within lead toxicity ranges for waterfowl associated with clinical and severe clinical lead poisoning. We also collected 19 Canada goose and 3 mallard fecal samples to evaluate exposure through sediment ingestion. Waterfowl using Lake Coeur d'Alene appear to be exposed to lead by ingesting contaminated lake sediment. Our model predicts a sediment lead effects range of 147-944 mg/kg (dw) and mortality effects level of 1652 mg/kg (dw) for mallards utilizing Lake Coeur d'Alene. The locations of Harrison Slough, Powderhorn Bay, and Cottonwood Bay at the mouth of the Coeur d'Alene River and Blackwell Island and Cougar Bay near the Spokane River outflow of Lake Coeur d'Alene were the areas of greatest concern for waterfowl exposure to lead contaminated sediment.

Animals↗

Importance of sediment-water interactions in Coeur d'Alene Lake, Idaho, USA: management implications.

A field study at Coeur d'Alene Lake, Idaho, USA, was conducted between October 1998 and August 2001 to examine the potential importance of sediment-water interactions on contaminant transport and to provide the first direct measurements of the benthic flux of dissolved solutes of environmental concern in this lake. Because of potential ecological effects, dissolved zinc and orthophosphate were the solutes of primary interest. Results from deployments of an in situ flux chamber indicated that benthic fluxes of dissolved Zn and orthophosphate were comparable in magnitude to riverine inputs. Tracer analyses and benthic-community metrics provided evidence that solute benthic flux were diffusion-controlled at the flux-chamber deployment sites. That is, effects of biomixing (or bioturbation) and ground-water interactions did not strongly influence benthic flux. Remediation efforts in the river might not produce desired water-quality effects in the lake because imposed shifts in concentration gradients near the sediment-water interface would generate a benthic feedback response. Therefore, development of water-quality models to justify remediation strategies requires consideration of contaminant flux between the water column and underlying sediment in basins that have been affected by long-term (decadal) anthropogenic activities.

Animals↗

Northern Idaho house dust and soil lead levels compared to the Bunker Hill Superfund Site.

House dust has been identified as a major exposure medium for lead (Pb) in children. High levels of Pb in soil and house dust have been recorded at the Bunker Hill Superfund Site (BHSS) in northern Idaho, an historic mining and smelting district. Soil and dust remediation at the site was required; however, regional background soil and dust Pb levels had not been well characterized. The objective of this survey was to determine background house dust Pb levels and to compare those levels with concentrations, and dust and Pb loading rates measured at the BHSS. Soil and house dust samples were collected in five towns demographically similar to the BHSS but unaffected by the mining industry. The background concentrations and loading rates were significantly lower than those observed at the site. House age was a significant factor affecting background soil and house dust Pb concentrations and loading rates.

Censuses↗

Occurrence of sulfonamide antimicrobials in private water wells in Washington County, Idaho, USA.

Samples from six private wells formerly used as sources for drinking water by the residents of Washington County (Weiser, Idaho) were collected to assess the impact of a nearby confined animal feeding operation (CAFO) on the quality of the local groundwater. All six samples were found contaminated by two veterinary antimicrobials, sulfamethazine (at concentrations from 0.076 to 0.22 microg/l) and sulfadimethoxine (at concentrations from 0.046 to 0.068 microg/l). These groundwater samples also contained elevated concentrations of nitrate and ammonium. Three of the sampled wells have nitrate levels that exceeded the maximum contaminant level set by the US Environmental Protection Agency for drinking water, with nitrate concentration as high as 39.1mg/l. All but one well showed nitrate, which instead contained ammonium at 1.22 mg/l. Analysis of the nitrate and ammonium in these samples by isotopic ratio mass spectrometry indicated delta(15)N characteristic of an animal or human waste source. Results from this study underscore the role of CAFO as an important source of antibiotic contamination of groundwater.

Anti-Infective Agents↗