Dogs and cats as environmental fall hazards

Problem

Falls are the leading cause of non-fatal injuries in the United States. This study assessed the prevalence of fall injuries associated with cats and dogs in the United States and describes the types of injuries sustained, the location, activity, and circumstances under which they occurred.

Methods

Data were from a nationally representative sample of emergency department visits from January 1, 2001 to December 31, 2006, available through the National Electronic Injury Surveillance System All Injury Program (NEISS-AIP).

Results

Based on 7,456 cases, an estimated 86,629 fall injuries each year were associated with cats and dogs, for an injury rate of 29.7. There were 7.5 times as many injuries involving dogs as cats and females were 2.1 times more likely to be injured than males. Injury rates were highest among people aged ≥ 75, but pets were a fall hazard for all ages. Fractures and contusions or abrasions were the most common injuries; the highest rates were for injuries to the extremities. About 66.4% of falls associated with cats and 31.3 % of falls associated with dogs were caused by falling or tripping over the pet. An additional 21.2% of falls related to dogs were caused by being pushed or pulled.

Summary

Although pets were associated with fall injuries, this risk can be reduced by increasing public awareness about situations that can lead to falls, such as dog-walking and chasing pets, and by calling attention to the importance of obedience training for dogs to minimize hazardous behaviors such as pulling and pushing.

Impact on industry

Fall injuries represent a burden to individuals, our society and our health care system. Increasing public awareness and implementing basic prevention strategies can help people of all ages enjoy their pets, reduce their chances of experiencing pet-related falls, and lessen the impact of fall injuries on our health care system.     

Naugatuck Glass: An update on environmental successes with the systems approach

A company highlighted in the last issue of Environmental Quality Management offers an update on its continuing environmental accomplishments. © 2000 John Wiley & Sons, Inc.     

Using a systems approach to improve process and environmental performance

By providing companies with a set of analytical tools, the systems approach allows decision makers to achieve the elusive goal of continuous environmental improvement. © 2000 John Wiley & Sons, Inc.     

Nonfatal bathroom injuries among persons aged ≥15 years--United States, 2008

Problem

Information about where nonfatal unintentional injuries occur is limited, but bathrooms commonly are believed to be a hazardous location.

Methods

Data from a nationally representative sample of hospital emergency departments (ED) was used to quantify and characterize nonfatal unintentional bathroom injuries among people aged ≥ 15 years.

Results

In 2008, an estimated 234,094 nonfatal bathroom injuries were treated in EDs. Most injuries (81.1%) were caused by falls and 37.3% of injuries occurred when bathing, showering, or getting out of the tub or shower. Both injury and hospitalization rates increased with age.

Summary

These results suggest that bathrooms tend to be most hazardous for persons in the oldest age groups.

Impact on Industry

Bathroom injuries among all household members might be reduced by increasing awareness about potentially hazardous activities in the bathroom combined with simple environmental changes such as adding grab bars inside and outside the tub or shower.     

Outcome of prenatally diagnosed trisomy 6 mosaicism

We report the prenatal diagnosis of trisomy 6 mosaicism via amniocentesis, in which trisomy 6 cells were identified in three of five culture vessels with 33% (5/15) of colonies showing trisomic cells. The pregnancy was electively terminated and examination revealed minor abnormalities (shortening of the femurs, micrognathia, posterior malrotation of the ears, and bilateral camptomelia of the second digit of the hands and fifth digits of the feet). Cytogenetic analysis of the placenta showed trisomy 6 in 100% of 20 cells studied. Karyotype was 46,XX in 100 cells examined from fetal skin. There are relatively few prenatally diagnosed cases of mosaic trisomy 6 at amniocentesis. Confined placental mosaicism (CPM) has been postulated in other cases where follow-up cytogenetic studies were not available. The present case differs from those previously reported, as it appears to represent CPM of chromosome 6 with phenotypic effects to the fetus. Copyright © 2002 John Wiley & Sons, Ltd.     

Soil-geomorphic heterogeneity governs patchy vegetation dynamics at an arid ecotone

Soil properties are well known to affect vegetation, but the role of soil heterogeneity in the patterning of vegetation dynamics is poorly documented. We asked whether the location of an ecotone separating grass-dominated and sparsely vegetated areas reflected only historical variation in degradation or was related to variation in inherent soil properties. We then asked whether changes in the cover and spatial organization of vegetated and bare patches assessed using repeat aerial photography reflected self-organizing dynamics unrelated to soil variation or the stable patterning of soil variation. We found that the present-day ecotone was related to a shift from more weakly to more strongly developed soils. Parts of the ecotone were stable over a 60-year period, but shifts between bare and vegetated states, as well as persistently vegetated and bare states, occurred largely in small (<40 m2) patches throughout the study area. The probability that patches were presently vegetated or bare, as well as the probability that vegetation persisted and/or established over the 60-year period, was negatively related to surface calcium carbonate and positively related to subsurface clay content. Thus, only a fraction of the landscape was susceptible to vegetation change, and the sparsely vegetated area probably featured a higher frequency of susceptible soil patches. Patch dynamics and self-organizing processes can be constrained by subtle (and often unrecognized) soil heterogeneity.     

ZOOPLANKTON COMMUNITIES OF A NEW PUMPED STORAGE RESERVOIR1

ABSTRACT: Zooplankton colonization was followed for 16 months in Lake Oconee, Georgia, a new pumped storage reservoir. Data were interpreted to identify differences among stations and seasons, as a function of the reservoir's early stage of development and of pumped storage operations. Colonization was rapid, and the zooplankton community was characterized by a high species diversity; approximately 40 rotifer species and 14 cladoceran genera were recorded. Zooplankton density varied along an environmental gradient from riverine to lentic conditions. Rotifer abundance varied from 10⁴-10⁶ individuals/m³, with maxima in the summers Copepod and cladoceran densities ranged from 10³ to nearly 10⁵ individuals/m³; maxima for stations other than the dam were observed in the summer and early fall, but high values at the dam station occurred throughout winter 1980. When pumped storage operations began in December 1979, zooplankton densities increased at the dam station. Pumpback decreased the intensity of the environmental gradient from riverine to lentic conditions, and led to a more similar zooplankton community structure throughout the reservoir.     

Growth costs of territorial overlap: experiments with juvenile lizards (Anolis aeneus)

Summary Several theoretical models have suggested that increases in territory overlap with conspecifics should result in lower rates of resource accumulation by territorial residents. This assumption was tested using juvenile Anolis aeneus lizards, which exhibit variable degrees of territory overlap in both the field and laboratory. In a series of laboratory trials under controlled density and resource conditions, juvenile growth rates were negatively related to the degree of territory overlap. This effect aplied to juveniles of all but the lowest status groups, although higher status juveniles had more exclusive territories than did lower status juveniles. Focal studies indicated that food depletion in the zones of overlap was the most likely reason for the negative relationship between territory overlap and growth. It is suggested that juveniles in the field may tolerate extensive territory overlap in spite of growth penalties because of a general shortage of predator-safe homesites in undisturbed habitats.     

QUANTIFICATION OF THE WATER BUDGET AND NUTRIENT LOADING IN A SMALL PEATLAND1

ABSTRACT: Few water budgets exist for specific types of wetlands such as peatlands, even though such information provides the basis from which to investigate linkages between wetlands and upland ecosystems. In this study, we first determined the water budget and then estimated nutrient loading from an upland farm field into a 1.5 ha, kettle-block peatland. The wetland contains highly anisotropic peat and has no distinct, active layer of groundwater flow. We estimated the depth of the active layer using Fick's law of diffusion and quantified groundwater flow using a chemical mass balance model. Evapotranspiration was determined using MORECS, a semi-physical model based on the Penman-Monteith approach. Precipitation and surface outflow were measured using physical means. Groundwater provided the major inflow, 84 percent (44,418 m³) in 1993 and 88 percent (68,311 m³) in 1994. Surface outflow represented 54 percent (28,763 m³) of total outflows in 1993 and 48 percent (37,078 m³) in 1994. A comparison of several published water budgets for wetlands and lakes showed that error estimates for hydrologic components in this study are well within the range of error estimates calculated in other studies. Groundwater inflow estimates and nutrient concentrations of three springs were used to estimate agricultural nutrient loading to the site. During the study period, nutrient loading into the peatland via groundwater discharge averaged 24.74 kg K ha^-1, 1.83 kg total inorganic P ha^d, and 21.81 kg NO₃-N ha^-1.