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Biomedical subjects

J E Mosier

Publications and source records attributed to J E Mosier.

16 recordsLinked to original sources
PubMed1989

Effect of aging on body systems of the dog.

A common property of all aging systems is that of progressive and irreversible change, which may be hastened by the effects of disease, stress, nutrition, exercise, genetics, and environment. Current knowledge and technology provide increasing opportunity to effect change and improvement in the pursuit of health, longevity, and enhanced quality of animal life. Older animals seldom have a single disease, but rather each one represents a unique combination of varying levels of loss of function at both the cellular and systems level. Veterinarians should not accept that poor health and old age are inevitable companions. Knowledge of the common pathologic changes associated with age and their effect on function allows the clinician to plan more effectively and manage health care programs.

Aging↗
PubMed1984

Comparative aging changes in canine uterine tubes (oviducts): electron microscopy.

Uterine tubes (oviducts) from 20 dogs in 3 age groups were evaluated by scanning electron microscopy. Three segments of the left uterine tube from 4 prepubertal dogs, 8 middle-aged dogs (4 to 6 years), and 8 aged dogs (8 to 11 years) were collected after euthanasia or ovariohysterectomy. Specimens were collected while the dogs, except for one in the middle-aged group, were in late metestrus or anestrus (to reduce variation in tubal epithelium by estrogen stimulation). Subdivision of mucosal folds, invaginations of mucosa into the entire length of the folds, and height of the folds, increased with age; the width of the mucosal folds had decreased. Complete dedifferentiation of epithelium of the uterine tube ampulla and isthmus to nonciliated cells in a few aged dogs resembled changes in postmenopausal women. In 3 prepubertal dogs, cilia were present in the infundibulum of the uterine tube, but not in the ampulla and isthmus. In a late prepubertal dog, early ciliation of ampulla and isthmus began before first estrus. Nonciliated cells with a single central cellular projection were present in all segments and all age groups. The significance of the projection was discussed.

Aging↗
PubMed1984

Study of the feline and canine populations in the greater Las Vegas area.

Analysis of household dogs and cats, based on age-distribution data and on age-specific birth and survival rates, as well as on pet source, indicated that the dog and cat populations are stable and not increasing in size (lambda congruent to 1). Roaming dogs and cats euthanatized at the pound represented about 5.7% and 8.1% of the estimated dog and cat populations, respectively. The death at the pound seems to be effective in checking pet population growth. Among pets acquired, 84% were less than 1 year of age for dogs as compared with 88% for cats. Breeders and pet shops supplied about 7% of cats and 17% of dogs. About 10% of cats and 10% of dogs were acquired at the pound, while 6.4% of dogs and 14% of cats were acquired as stray. About 45% of dogs and 41% of cats were acquired from pet owners. Some dogs (12.46%) and cats (12%) were imported from outside the Las Vegas area. Of dogs and cats below 2 months of age, 33% and 19.5%, respectively, came from breeders or pet shops or were imported from outside the area. Seventeen percent of unspayed female dogs and 16% of unspayed female cats reproduced. The percentages of spayed females were 77 for dogs and 86 for cats. Forty-five percent of the dogs and 48% of the cats were males. Among dogs at the shelter, 2% were neutered and 26% spayed. At the pound, 24% of dogs were small breeds, 24% medium size breeds, and 52% large breeds.(ABSTRACT TRUNCATED AT 250 WORDS)

Age Factors↗
PubMed1982

Feline population dynamics: a study of the Manhattan, Kansas, feline population.

Analysis of the age-specific birth and survival rates and the age distribution in the pet population of cats in Manhattan, Kansas, revealed that the rate of population change (lambda) was about 1.18. This means that under present birth and death rates, the cat population can increase by about 18% per year. In reality, the increase may not be as high since pet ownership may not increase by as much. The frequency of spayed females of reproductive age in the Manhattan population was about 59%. This may not be sufficient to curb population growth. With the present age-specific survival rates, about 88% of the females should be spayed if the population is to remain stable. The ratio of people to cats in Manhattan was estimated to be 5.2:1. The average number of cats per household was 0.508. The percentage of households with cats was 28 with an average of 1.74 cats per household. In comparison, the average number of dogs per household was 0.43 and the percentage of households with dogs was 43 with an average of 1.36 dogs per household. The methods used in this study are useful for collecting and analyzing data to be used by governmental bodies and veterinarians concerned with proposals to regulate pet population growth and reproduction.

Animals↗
PubMed1980

Canine population dynamics: a study of the Manhattan, Kansas, canine population.

Analysis of the age distribution in the pet population of dogs in the community of Manhattan, Kansas from 1968 to 1979 revealed that the distribution was stationary and the rate of population change (lambda1) was close to 1, which means, that if present conditions do not change, the population probably would remain stable in size in the future. The number of females spayed in the Manhattan population reached a frequency of 66% in 1979. Considering only present age-dependent birth and survival rates, the population could not maintain itself and would decrease rapidly in size. It was found, however, that the population is maintained by a high net rate of immigration, with about 75% of all dogs under 6 months old coming from outside the Manhattan population. The ratio of people to dogs in Manhattan was estimated to be 4.14:1; about 41% of all dogs under 6 months of age were acquired through breeders. Roaming animals in 1 year represented about 12% of the canine population in Manhattan; of those, 36% were stray (not claimed by owner) and the rest were owned and redeemed. The data represented only a portion of the population (dogs with responsible owners) and for a complete understanding of the dynamics of the entire population, one should analyze roaming dogs in a similar way. The methods described in this study should be useful for collecting data to be used by veterinarians and municipal authorities confronted with proposals for regulation dealing with reproduction and pet population.

Age Factors↗
PubMedDate not supplied

Evaluation of the tibia as a source of autogenous cancellous bone in the horse.

A 1 cm defect was created in the proximal medial cortex of 12 tibiae, cancellous bone was removed from the site, and the bones were fractured by loading in torsion. The fractures did not occur through the donor sites and the fracture patterns and loads to fracture were similar for the treated tibiae and their untreated mates. Cancellous bone was harvested from the proximal medial aspect of both tibiae in nine adult horses. The soft tissue wounds were monitored for more than 10 days in seven horses and healing of the osseous defects was evaluated radiographically at regular intervals to month 6 in two horses. The site provided convenient access with the horses in lateral or dorsal recumbency, the anatomic landmarks were reliable, and the surgical procedure was simple and short. Complications occurred in only three incisions.

Animals↗