Primary tonsillar mast cell tumour in a dog          下载免费PDF全文

CC Shekell  MJ Thomson  RI Miller  JT Mackie 《Australian veterinary journal》2018,96(5):184-187

  相似文献   

Detection and genetic diversity of porcine rotavirus A,B and C in eastern Australian piggeries     

B Genz  J Gerszon  Y Pollock  B Gleeson  R Shankar  MJ Sellars  RJ Moser 《Australian veterinary journal》2023,101(4):153-163

Rotaviruses (RV) have a high prevalence in piggeries worldwide and are one of the major pathogens causing severe diarrhoea in young pigs. RV species A, B, and C have been linked to piglet diarrhoea in Australian pig herds, but their genetic diversity has not been studied in detail. Based on sequencing of the structural viral protein 7 (VP7) RVA G genotypes G3, G4 and G5, and RVC types G1, G3, G5, and G6 have been identified in Australian piggeries in previous studies. Although occurrence of RVB was reported in Australia in 1988, no further genetic analysis has been conducted. To improve health management decisions in Australian pig herds, more information on RV prevalence and genetic diversity is needed. Here, 243 enteric samples collected from 20 pig farms within Eastern Australia were analysed for the presence of RV in different age groups using a novel PCR-based multiplex assay (Pork MultiPath™ enteric panel). RVA, RVB, and RVC were detected in 10, 14, and 14 farms, respectively. Further sequencing of VP7 in selected RV-positive samples revealed G genotypes G2, G5, G9 (RVA), G6, G8, G14, G16, G20 (RVB), and G1, G3, G5, G6 (RVC) present. RVA was only detected in young (<10 weeks old) pigs whereas RVB and RVC were also detected in older animals (>11 weeks old). Interestingly, RVB and RVC G-type occurrence differed between age groups. In conclusion, this study provides new insights on the prevalence and diversity of different RV species in pig herds of Eastern Australia whilst demonstrating the ability of the Pork MultiPath™ technology to accurately differentiate between these RV species.  相似文献   

A Review of the Culture and Diseases of Redclaw Crayfish Cherax quadricarinatus (Von Martens 1868)     

Imad P. Saoud  Joly Ghanawi  Kenneth R. Thompson  Carl D. Webster 《Journal of the World Aquaculture Society》2013,44(1):1-29

  相似文献   

Evaporation from fetch-limited water bodies     

Ian T. Webster  Bradford S. Sherman 《Irrigation Science》1995,16(2):53-64

An analytic model to calculate evaporation from fetch-limited water bodies is described. By modifying the surface boundary condition to an analytic solution to the advection-diffusion equation for specific humidity in the air flow over a water body, we are able to solve for the entire specific humidity field q (x, z) from a single measurement of humidity, surface temperature, and wind speed. Comparisons of model predictions with measurements from Rushy Billabong, a small turbid lake, over a 146 day period show that on average the model underestimates evaporation rates by 12%. We believe that the evaporation shortfall is due to the downwind advection of heat within the billabong when the billabong is highly stratified in temperature. When the thermal stratification is weak, the advection of heat within the water column is less important and the model is an accurate predictor of evaporation.  相似文献   

Changing technology for training irrigation managers     

J. P. G. Webster 《Irrigation and Drainage Systems》1989,3(3):211-215

This article describes developments in microcomputer and video-disc technology which may be used in the training of managers for irrigation projects.  相似文献   

Early harvest and ensilage of forage sorghum infected with ergot (Claviceps africana) reduces the risk of livestock poisoning     

BJ Blaney  MJ Ryley  BD Boucher 《Australian veterinary journal》2010,88(8):311-312

Sorghum ergot produces dihydroergosine (DHES) and related alkaloids, which cause hyperthermia in cattle. Proportions of infected panicles (grain heads), leaves and stems were determined in two forage sorghum crops extensively infected 2 to 4 weeks prior to sampling and the panicles were assayed for DHES. Composite samples from each crop, plus a third grain variety crop, were coarsely chopped and half of each sealed in plastic buckets for 6 weeks to simulate ensilation. The worst-infected panicles contained up to 55 mg DHES/kg, but dilution reduced average concentrations of DHES in crops to approximately 1 mg/kg, a relatively safe level for cattle. Ensilation significantly (P = 0.043) reduced mean DHES concentrations from 0.85 to 0.46 mg/kg.  相似文献   

Photochemistry of halogenated benzene derivatives. Part IX. environmental aquatic phototransformation of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile)     

Jan Kochany  Ghulum Ghaus Choudhry  G. R. Barrie Webster 《Pest management science》1990,28(1):69-81

Photochemistry of the herbicide 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) (I) was investigated by irradiating at approximately 313 nm. Aqueous phase photoreactions of 0.078–7.800 × 10^?5m solutions of I were carried out at different pH values. Quantum yields for the loss of I in buffered solutions were 0.008 (±0.0004), 0.048 (±0.0024), and 0.044 (±0.0022) at pH 2.6, 7.0, and 11.0, respectively. In neutral and basic conditions, I absorbed more strongly at wavelengths > 290 nm, an environmentally significant region. Phototransformation of I was monitored by HPLC and UV-VIS spectrometry. All photoreactions of I gave rise to the generation of two products, 3-bromo-4-hydroxybenzonitrile and 4-hydroxybenzonitrile. The former photoproduct was tentatively identified from its mass spectral data. The photoproducts can be accounted for with a proposed mechanism involving free radicals.  相似文献   

Distribution of fenvalerate and permethrin residues on cattle hair following variable application rates of impregnated ear tags     

Felix S. Mwangala  Leonard P. Sarna  Terry D. Galloway  G. R. Barrie Webster 《Pest management science》1993,39(3):179-184

Fenvalerate and permethrin residues on hair of groups of cattle that received either two tags per adult animal or one tag for every other adult animal were determined using gas chromatography over a three-month period in 1987 and 1988. Cattle with two tags had consistently higher residues than cattle with one tag. This difference was statistically significant (P < 0.05) in the first month for residues on the head and in the first two weeks for residues from the body in 1987. Residues on cattle with one tag and without a tag in the same herd were similar (P > 0.05) on each sampling day on all regions. Residues on the hair from the head of cattle with two tags were greater than on the body and rump (P < 0.05) during the first 28 days. Residues found on hair on days 14 and 84 following tag application declined by 80–86% on the head, 73–78% on the body, and 36–86% on the rump. Isomeric compositions of fenvalerate (range 51–61% SR, RS: 39–49% SS, RR) and permethrin (range 61–67% trans: 33–39% cis) were consistent during the study. Rainfall reduced residues on hair.  相似文献   

History and epizootiology of rabies in Canada.   总被引：8，自引：5，他引：3       下载免费PDF全文

H Tabel  A H Corner  W A Webster    C A Casey 《The Canadian veterinary journal. La revue veterinaire canadienne》1974,15(10):271-281

  相似文献   

THE EFFECT OF STORAGE CONDITIONS ON THE INFECTIVITY OF NARCISSUS STEM EELWORM   总被引：1，自引：1，他引：0  

J. M. Webster 《Plant pathology》1964,13(4):151-154

  相似文献