Hypokalaemic episodic polymyopathy in cats fed a vegetarian diet     

A. LEON  SAF BAIN  WR LEVICK 《Australian veterinary journal》1992,69(10):249-254

A previously undocumented hypokalaemic condition with a cyclical nature, comprising acute bouts of polymyopathy followed by spontaneous recoveries, is described in the cat. Cats being fed a high protein vegetarian diet developed recurrent episodes of polymyopathy, characterised by ventroflexion of the head and neck, stiff forelimb gait, lateral head-resting and generalised muscle weakness. Plasma potassium concentrations (mean +/- standard deviation) were reduced from 3.28 +/- 0.33 mmol/l at the beginning of the experiment to 2.45 +/- 0.24 mmol/l during bouts of myopathy. This hypokalaemia was associated with increased creatine kinase activities indicative of muscle damage, and decreased urinary potassium concentrations, and was caused by insufficient dietary potassium. Cats that received the same diet supplemented with potassium did not develop hypokalaemic polymyopathy. Spontaneous recoveries of affected cats were not associated consistently with increases in plasma potassium concentrations. Plasma taurine concentrations decreased and glutamic acid increased markedly in all cats fed the experimental diet. There was no evidence of thiamin deficiency associated with the high glutamic acid intake. Veterinarians should be aware that hypokalaemic cats, and in particular those on potassium-deficient diets, may show cyclical disease with episodes of polymyopathy recurring after periods of spontaneous clinical recovery. This condition in cats may be a useful animal model for familial hypokalaemic periodic paralysis in humans.  相似文献   

Negative findings from serological studies of equine morbillivirus in the Queensland horse population   总被引：2，自引：0，他引：2  

MP WARD  PF BLACK  AJ CHILDS  FC BALDOCK  WR WEBSTER  BJ RODWELL  SL BROUWER 《Australian veterinary journal》1996,74(3):241-243

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A comparison between the diffusivity of gases in soil cores and in soil aggregates   总被引：1，自引：0，他引：1  

D.T. PRITCHARD 《European Journal of Soil Science》1985,36(2):153-162

Gas diffusivity was measured in duplicate soil cores (10 cm long and 6 cm diameter) from depths of 0–10, 10–20 and 20–30 cm, and in beds of 1–2 mm aggregates taken from the same site at the same depths. A steady state method was used, with ethane as the diffusing gas. As the samples dried, the fractional air-filled pore space increased, from 0. 1 to 0.45 for the cores and from 0.35 to 0.65 for the aggregates. The maximum relative diffusivity of the aggregate samples (0.38) was approximately twice that of the core samples, reflecting the difference in pore space. Equations are presented for calculating the solid, air and water fractions of the samples and for calculating the diffusivity within peds and aggregates. These calculations allowed a comparison of the diffusion/porosity relationship within aggregates and peds.  相似文献   

Follow-up of mercury levels in fish,human hair and urine in the Madeira and Tapajós basins,Amazon, Brazil     

Malm  O  Guimarães  JRD  Castro  MB  Bastos  WR  Viana  JP  Branches  FJP  Silveira  EG  Pfeiffer  WC 《Water, air, and soil pollution》1997,97(1-2):45-51

Informal economy of gold mining has contaminated some important river basins in Amazon. Follow-up studies on critical compartments showed some areas with high Hg levels in fish as well as in human hair samples. Average Hg in piscivorous fish in the Madeira river itself was 846 ppb (N=284) with a maximum of 3921 ppb. Mercury in fish from non polluted areas in this basin shows high variability, even for single species. A seasonal variation in Hg content was observed, with higher values at the end of the dry season. In the upper Tapajós basin comparable values were found for fish but with a definite decreasing trend downstream. Average value for piscivorous fish in the whole Tapajós basin is 482 ppb (N=122) with a maximum value of 3770 ppb. Hair Hg was higher in fishing villages in the Tapajós (average: 17 ppm; with N=432 and maximum value of 176 ppm) than in the Madeira (average: 9 ppm; N=169; maximum 71 ppm), and data from some areas of the Tapajós suggest a decrease with time. Mercury was much higher in urine of goldshop workers in Santarém (low Tapajós) than in Alta Floresta (high Tapajbs) and show a decreasing trend in both cases, probably related to the significant decline in gold mining activities during the study period (1986–1994).  相似文献   

Symposium on the mucosal disease complex. III. Virus diarrhea in cattle     

PRITCHARD WR  CARLSON RG 《Journal of the American Veterinary Medical Association》1957,130(9):383-385

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Studies on trichloroethylene-extracted feeds. III. The use of young calves for study of various aspects of toxicity of trichloroethylene-extracted soybean oil meal     

PRITCHARD WR  MATTSON WE  SAUTTER JH  SCHULTZE MO 《American journal of veterinary research》1956,17(64):437-441

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Studies on trichloroethylene-extracted feeds. VI. The effects of feeding trichloroethylene-extracted soybean oil meal to sheep     

PRITCHARD WR  PERMAN V  MATTSON WE  SAUTTER JH  SCHULTZE MO 《American journal of veterinary research》1956,17(64):446-448

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The pathology of virus diarrhea of cattle in Indiana     

CARLSON RG  PRITCHARD WR  DOYLE LP 《American journal of veterinary research》1957,18(68):560-568

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Studies on trichloroethylene-extracted feeds. II. The effect of feeding different levels of trichloroethylene-extracted soybean oil meal to young heifers: experimental production of chronic aplastic anemia     

PRITCHARD WR  REHFELD CE  MATTSON WE  SAUTTER JH  SCHULTZE MO 《American journal of veterinary research》1956,17(64):430-437

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Phylogenetic characterisation of bluetongue viruses from naturally-infected insects, cattle and sheep in Australia   总被引：1，自引：0，他引：1  

KA McCOLL  AR GOULD  LI PRITCHARD  L MEL VILLE†  G. BELLIS† 《Australian veterinary journal》1994,71(4):102-105

SUMMARY The polymerase chain reaction was used to detect the presence of blue-tongue virus (BTV) in a number of clinical and insect samples collected in the Northern Territory of Australia. Sequence analyses of the amplified BTV genes differentiated endemic Australian and exotic viruses. Two potential exotic BTV were detected as a result of PCR analyses of blood from sentinel animals and of the insect vector, Culicoides wadai. The detection of BTV in C wadai was the first direct demonstration of the presence of BTV in this potential vector. This new technology can significantly reduce the time taken for a diagnosis from a clinical sample and increase the amount of useful information obtained on a BTV isolate by using rapid sequencing techniques. Sequence data were used to differentiate between BTV20 isolated in 1975 and two isolates of the same serotype, isolated in 1992, and indicated that the latter were probably a recent incursion into Australia from Indonesia due to their greater VP3 sequence homology to the BTV9 (Java) than to Australian BTV isolates.  相似文献