Prevalence of the causes of fleece derangement among sheep flocks in New South Wales     

PW JOHNSON  JC BORAY  JW PLANT  SC BLUNT† 《Australian veterinary journal》1993,70(6):220-224

SUMMARY An investigation of sheep flocks with unknown histories of fleece derangement, selected at random from the main sheep raising areas of New South Wales, showed that Psorergates ovis was present in 53 of the 177 flocks surveyed and In 162 of the 3495 sheep examined. Of the single causes of fleece derangement, the most prevalent was grass seed contamination (15.7%) followed by Infestation with sheep body lice, Bovicola ovis, (14.7%) and Infestation with Itch mite (7.8%). The prevalence of fleece derangement was significantly higher on sheep In which lice were the only ectoparasites found than on those In which Itch mites were the only ectoparasites present. The greatest prevalence of P ovis was In flocks In the Young, Yass, Mudgee and Tenterfield districts. In most affected flocks, more than one potential cause of fleece derangement was present. Itch mite Infestation was more prevalent in flocks that received no treatment for ectoparasites than in those that had been treated in the year preceding the survey. Our results did not support a commonly held belief among farmers that arsenical compounds control Infestations of Itch mites more effectively than other types of pesticides. There was no significant difference in prevalence of fleece derangement between flocks treated with different pesticide groups and those that received no treatment, but mean fleece derangement score was significantly lower in sheep treated with organophosphates than in untreated sheep. Infestations of lice were significantly more prevalent in sheep from flocks treated with synthetic pyrethroids than from those treated with organophosphates or those that received no treatment.  相似文献   

Treatment and prevention of equine gastric ulcer syndrome.     

Benjamin R Buchanan  Frank M Andrews 《Veterinary Clinics of North America: Equine Practice》2003,19(3):575-597

EGUS is a common problem in horses and foals. Acids are the important causative factors and current therapy targets the suppression of gastric HCl and creation of a permissive environment for ulcer healing. Diagnosis is based on history, clinical signs, gastroscopy, and response to treatment. Of the products available, only GastroGard (FDA approved) and ranitidine have been shown to be efficacious in the treatment of EGUS. Ranitidine is often associated with treatment failure as a result of incorrect dosing and lack of owner compliance, because of the three times daily dosing required. Also, EGUS occurs in critically ill neonatal foals, but the pathogenesis may be different than in adult horses and acid-suppressive therapy may not be as effective.  相似文献   

Poisoning of feedlot cattle by seeds of Heliotropium europaeum     

BD HILL  KL GAUL  JW NOBLE 《Australian veterinary journal》1997,75(5):360-361

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Cardiac tamponade during catheterization of a dog with congenital heart disease     

J W Buchanan  R L Pyle 《Journal of the American Veterinary Medical Association》1966,149(8):1056-1066

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Thoracic surgery in the dog and cat. 3. Patent ductus arteriosus and persistent right aortic arch surgery in dogs     

J W Buchanan 《The Journal of small animal practice》1968,9(8):409-428

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Treatment of bovine mastitis with rifamycin SV     

R S Buchanan  R N Wanstall  N L Coxhead 《New Zealand veterinary journal》1973,21(6):116-122

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Tracheal signs and associated vascular anomalies in dogs with persistent right aortic arch     

Buchanan JW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(4):510-514

Medical records of 55 dogs with 1 or more vascular rings around the esophagus and trachea were reviewed to determine the nature and frequency of related vascular anomalies and to determine the reliability of tracheal deviation on radiographs for the diagnosis of persistent right aortic arch (PRAA). Fifty-two (95%) of the 55 dogs had PRAA. Of the 52 dogs with PRAA, 44% had coexisting compressive arterial anomalies: 17 had retroesophageal left subclavian artery and 6 had double aortic arch with atretic left arch. Characteristic tracheal deviation was consistently present in dogs with PRAA. Moderate or marked focal leftward curvature of the trachea near the cranial border of the heart in dorsoventral (DV) or ventrodorsal (VD) radiographs was found in 100% of available radiographs of 27 dogs with PRAA. Moderate or marked focal narrowing of the trachea also was noted in 74% of DV or VD radiographs and 29% of lateral radiographs of the dogs. Tracheal position in 30 of 30 dogs with megaesophagus and 62 of 63 control dogs was midline or rightward in VD or DV radiographs. Histology in a neonatal dog with PRAA revealed evidence of tracheal deviation and compression even before birth. Focal leftward deviation of the trachea near the cranial border of the heart in DV or VD radiographs is a reliable sign of PRAA in young dogs that regurgitate after eating solid food, and contrast esophagrams are not necessary to confirm the diagnosis of vascular ring compression.  相似文献   

Neuroaxonal dystrophy in Merino‐Border Leicester × Polled Dorset lambs     

JW Finnie  IV Jerrett  J Manavis  J Cave 《Australian veterinary journal》2014,92(10):389-391

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Partitioning the energetics of walking and running: swinging the limbs is expensive     

Marsh RL  Ellerby DJ  Carr JA  Henry HT  Buchanan CI 《Science (New York, N.Y.)》2004,303(5654):80-83

Explaining the energetics of walking and running has been difficult because the distribution of energy use among individual muscles has not been known. We estimated energy use by measuring blood flow to the hindlimb muscles in guinea fowl. Blood flow to skeletal muscles is controlled locally and varies directly with metabolic rate. We estimate that the swing-phase muscles consume 26% of the energy used by the limbs and the stance-phase muscles consume the remaining 74%, independent of speed. Thus, contrary to some previous suggestions, swinging the limbs requires an appreciable fraction of the energy used during terrestrial legged locomotion. Models integrating the energetics and mechanics of running will benefit from more detailed information on the distribution of energy use by the muscles.  相似文献   

Choline acetyltransferase activity in striatum of neonatal rats increased by nerve growth factor   总被引：35，自引：0，他引：35  

W C Mobley  J L Rutkowski  G I Tennekoon  K Buchanan  M V Johnston 《Science (New York, N.Y.)》1985,229(4710):284-287

Some neurodegenerative disorders may be caused by abnormal synthesis or utilization of trophic molecules required to support neuronal survival. A test of this hypothesis requires that trophic agents specific for the affected neurons be identified. Cholinergic neurons in the corpus striatum of neonatal rats were found to respond to intracerebroventricular administration of nerve growth factor with prominent, dose-dependent, selective increases in choline acetyltransferase activity. Cholinergic neurons in the basal forebrain also respond to nerve growth factor in this way. These actions of nerve growth factor may indicate its involvement in the normal function of forebrain cholinergic neurons as well as in neurodegenerative disorders involving such cells.  相似文献