Biomedical subjects
S E McDonald
Publications and source records attributed to S E McDonald.
A study of the relationship among body position, bladder function and urine variables in spinal cord injured subjects.
Clinical observations of nurses working with spinal cord patients describe positional changes affecting diuresis. Research has not documented this phenomenon in detail. Knowledge of the timing of diuresis may allow more control over bladder management. The purpose of this descriptive pilot study was to determine the relationship among body position, timing of diuresis, urine volume, and fluid intake in spinal cord injured subjects. A convenience sample of six subjects with varying levels of spinal cord injury were studied. For five consecutive days, positional changes were determined during bed, wheelchair, and tilt activities. Fluid intake and urine volume, specific gravity, and colony count were measured. Data analysis using correlation and regression statistics revealed head and foot elevation and fluid intake may account for some variance but do not predict total variance in urine output. Future research to validate findings in a controlled setting may provide a scientific basis for bladder management.
Squamous cell carcinoma of the cervix in a blackbuck.
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Untoward effects of onychectomy in wild felids and ursids.
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Avian pox in blue-fronted Amazon parrots.
During a 1-month period at a quarantine station, an epornitic of avian pox occurred in blue-fronted Amazon parrots (Amazona aestiva). Clinical signs included conjunctivitis, blepharitis, and varying degrees of anorexia and respiratory distress. Lesions included periocular ulcerations and scabs and necrotic plaques in the oral cavity. Histologically, the lesions consisted of epithelial hyperplasia, secondary inflammatory changes, and eosinophilic inclusions which, by electron microscopy, were shown to contain poxvirus. When chicken embryos were inoculated with material from eyelid scabs and pharyngeal plaques, lesions of avian pox developed on the chorioallantoic membrane. The death rate of infected birds was high because of secondary bacterial and fungal infections, but uncomplicated cases were usually self-limiting. Periocular lesions also developed in 2 other species of psittacine birds housed in the same facility.
Cytauxzoon-like organisms in erythrocytes of two cheetahs.
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Manual retrieval of a gastric foreign body in an Atlantic bottlenose dolphin.
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Physiologic and hematologic values in Nelson desert bighorn sheep.
Physiologic and hematologic values were established for two groups of free ranging Nelson desert bighorn sheep (Ovis canadensis nelsoni). Eleven sheep (Group I) were captured with a drop net, 16 sheep (Group II) were immobilized with Etorphine introduced in projectile syringes. The mean glucose level, respiration rate and leucocyte count values for Group I sheep were more than twice those observed in Group II sheep. There were no differences between the groups in the other values. Data obtained were compared to values previously established for free ranging and captive Rocky Mountain bighorn sheep (O. c. canadensis), California bighorn sheep (O. c. californiana) and domestic sheep (O. aries).
Trixacarus caviae infestation in two guinea pigs.
Sarcoptid mites identified as Trixacarus caviae (Acarina: Sarcoptidae) were found in skin scrapings taken from two pet guinea pigs with generalized skin lesions. Clinical signs included intense pruritus, widespread alopecia and hyperkeratosis. The lesions regressed following treatment with lime sulfur.