Airway hypersensitivity induced by Ascaris suum extract in New Zealand Romney sheep     

Chen W  Pack RJ  Alley MR  Carr DH  Manktelow BW 《New Zealand veterinary journal》1990,38(2):57-61

Sheep from local farms with and without previous exposure to pigs were tested for their skin and airway responses to a commercial Ascaris suum antigen. There was an immediate reaction to intradermal injection of the antigen in 90% of 101 sheep. A bronchial provocation test by aerosol of the same antigen was undertaken on 43 of the sheep with a positive skin reaction. About 70% of sheep showed an immediate airway response to the antigen as an aerosol, reflected as a significant increase in airway resistance and/or decrease of dynamic lung compliance. The mean peak airway resistance and mean lowest dynamic lung compliance were 165% above and 61% below their baselines, respectively. No significant changes were recorded when the same animals were given an aerosol of phosphate buffered saline. Similarly, no correlation was found between the degree of skin reaction and the magnitude of bronchoconstriction (p>0.05). The sheep with previous exposure to pigs showed no significant differences in airway responses to antigen challenge, although they showed significantly greater skin reactions than those without exposure to pigs. These results indicate that the majority of Romney sheep in the Manawatu have a natural skin and airway sensitivity to A. suum antigen and may therefore be used as an animal model to study human airway hypersensitivity. The origin of this sensitivity has yet to be determined.  相似文献   

Boar culling in swine breeding herds in Minnesota   总被引：1，自引：1，他引：0       下载免费PDF全文

D'Allaire S  Leman AD 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(8):581-583

This investigation was conducted to study boar culling patterns in swine breeding herds. Data were obtained from 84 swine breeding herds and included 440 boars that were culled. Each producer was involved for 12 consecutive months, and recorded every boar that was removed from the herd, the date, and the reason for culling. The annual culling rate for the 84 farms averaged 59.4% ± 6.4 (SEM). The correlation coefficient between boar and sow culling was 0.52 (p <0.0001). Removal was the result of being overweight (47%), reproductive problems (18%), leg problems (12%), death (7%), and other diseases (4%). From the annual culling rate, the average breeding life of boars was estimated at 20 months. From this study, we concluded that the annual culling rate for boars in commercial herds was high and related to several different factors.  相似文献   

Exercise in electrocardiography          下载免费PDF全文

O'grady MR  Allen DG 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(10):713

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Nephrotoxicity in dogs associated with methoxyflurane anesthesia and flunixin meglumine analgesia   总被引：2，自引：2，他引：0       下载免费PDF全文

Mathews KA  Doherty T  Dyson DH  Wilcock B  Valliant A 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(11):766-771

Uremia unexpectedly developed in five dogs 24 hours after undergoing thoracotomy in a student laboratory. In all dogs general anesthesia had been maintained with methoxyflurane, muscle relaxation had been induced with gallamine, and each dog received a single intravenous dose of 1.0 mg/kg flunixin meglumine for analgesia upon termination of anesthesia. In a subsequent group of dogs undergoing an orthopedic procedure, we assessed the effects on renal function of methoxyflurane anesthesia plus oxymorphone, or of methoxyflurane or halothane anesthesia in combination with a single IM 1.0 mg/kg dose of flunixin meglumine. Significant elevations in serum urea and creatinine values, and necrosis of collecting ducts and loops of Henle, were noted only in the dogs receiving methoxyflurane and flunixin meglumine.

We conclude that the use of combination of methoxyflurane and flunixin meglumine is contraindicated in dogs.

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Correction          下载免费PDF全文

Van Donkersgoed J  Ribble CS  Townsend HG  Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(6):417-418

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Humane practices committee report          下载免费PDF全文

Olfert ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(4):267-269

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An assessment of the copper status of dairy herds in the Waikato, Taranaki and Northland in spring and the effects of daily supplementation with copper sulphate     

Dewes HF  Lowe MD  McKay CE 《New Zealand veterinary journal》1990,38(3):98-101

The copper status of dairy herds in the Waikato, Taranaki and Northland regions between 1 August and 30 September was assessed by copper determinations made on composite sera from ten cows in each herd. Comparisons were made between two major groups categorised as as received and supplemented. In the latter, the cows received 2.0-6.0 g/day of copper sulphate orally from late gestation to the end of lactation. Mean copper values were determined from pastures in Taranaki and Northland and from pastures from three soil types in the Waikato. The lowest were in Northland (134.3 micromol/kg) and the highest in Taranaki (173.3 micromol/kg). Calculated dietary available copper levels showed the lowest were from pastures grown on organic soils in the Waikato. These soils also had high molybdenum levels. Serum copper values as received were lowest in Northland (7.30 micromol/l), and were marginal for both Taranaki (9.91 micromol/l) and the Waikato (9.93 micromol/l). The levels in supplemented herds were considerably higher, i.e. from the Waikato 11.7 micromol/l and from Taranaki 11.5 micromol/l. When liver and serum copper levels from paired samples were compared there was a reasonable correlation (r = 0.64) but the standard deviation approximated the mean liver copper level, i.e. 155 +/- 141 micromol/l.  相似文献   

Use of epidural morphine to relieve pain in a horse   总被引：2，自引：1，他引：1       下载免费PDF全文

Valverde A  Little CB  Dyson DH  Motter CH 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(3):211-212

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Diagnosis of monensin intoxication in poultry          下载免费PDF全文

Lindsey GD  Novilla MN  Stobbs LA 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(5):341

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Ontario. Canine ehrlichiosis in Ontario          下载免费PDF全文

Firneisz GD  Cochrane SM  Parent J  Houston DM 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(9):652-653

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