Comparative efficacy of moxidectin, an ivermectin/clorsulon combination and closantel against immature paramphistomes in cattle     

PF ROLFE  JC BORAY 《Australian veterinary journal》1993,70(7):265-266

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Actinobacillus seminis isolated from cattle     

Dixon RJ  Stevenson BJ  Sims KR 《New Zealand veterinary journal》1983,31(7):122-123

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PERINATAL FOAL MORTALITY ASSOCIATED WITH A HERPESVIRUS     

R. J. Dixon  W. J. Hartley  D. R. Hutchins  E. E. Lepherd  Caroline  Feilen †  R. F. Jones  †  Daria N.  Love †  Margaret  Sabine † Anne L.  Wells † 《Australian veterinary journal》1978,54(3):103-105

An outbreak of perinatal foal mortality associated with a herpesvirus is described. Twenty two foals either were still-born, or died soon after birth, or were weak and soon developed severe respiratory signs, or were normal at birth and developed respiratory symptoms 18 to 24 hours later. Elevated temperatures, heart and respiratory rates were constant features. The animals were severely leucopaenic, and showed an absolute neutropaenia. At autopsy the lungs were enlarged, and showed varying degrees of aeration and moderate to severe oedema and congestion. Histopathology showed an acute focal necrotising bronchiolitis with the presence of intranuclear eosinophilic inclusion bodies. Herpesvirus was recovered from 9 foals in cell culture and identified by electron microscopy.  相似文献   

Effects of relative humidity, light intensity and photoperiod on the colony development of Erysiphe sp. on Rhododendron     

D. M. Kenyon †  G. R. Dixon  S. Helfer 《Plant pathology》2002,51(1):103-108

Growth and reproduction by powdery mildew pathogens is generally inhibited by decreasing relative humidity. With Erysiphe sp. on Rhododendron cv. Elizabeth, the initial stages of colony development were adversely affected by reducing the relative humidity from 100% to 70 and 85%. No significant effects on secondary or tertiary hyphal development were detected. Light intensity and photoperiod both had considerable effect on the induced resistance response of the host. Over the initial 5 days of colonization there were no significant differences between any of the treatments. After 13 days, however, expansion of fungal colonies at 180 photosynthetic active radiation (PAR) was limited solely to the area initially infested by primary hyphae. By comparison, in colonies grown at 80 PAR regardless of day length, secondary and tertiary hyphae had extended beyond the area first colonized. These effects resulted in differing morphologies, small colonies of densely packed hyphae formed at 180 PAR compared with open spreading colonies at 80 PAR.  相似文献   

Equine guttural pouch empyema,why does it become chronic?          下载免费PDF全文

P. M. Dixon  O. A. James 《Equine Veterinary Education》2018,30(2):80-84

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Achromatopsia in three sibling Labrador Retrievers in the UK          下载免费PDF全文

Christopher J. Dixon 《Veterinary ophthalmology》2016,19(1):68-72

Achromatopsia was identified in three Labrador Retriever littermates. The dogs demonstrated day blindness, negotiating obstacles under low‐light conditions, but apparently blind when outdoors. One of the dogs presented with immature bilateral diffuse posterior cortical cataracts and clinical signs of day blindness became apparent following cataract extraction surgery. Electroretinography demonstrated an absence of a cone photoreceptor response to a bright stimulus and a flicker response of 30 Hz in all three dogs. No fundic lesions have been apparent ophthalmoscopically in any of the dogs as the initial presentation of each case. No abnormalities were detected with DNA screening for known mutations of the CNGB3 gene in any of the dogs.  相似文献   

Orthodontic correction of overjet/overbite (‘parrot mouth’) in 73 foals (1999–2013)          下载免费PDF全文

J. Easley  P. M. Dixon  R. J. M. Reardon 《Equine veterinary journal》2016,48(5):565-572

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Products from the sensitised photo-oxidation of 2-dimethylamino-5,6-dimethylpyrimidin-4-ol     

Stephen R. Dixon  Clifford H. J. Wells 《Pest management science》1989,25(3):255-260

The products from the methylene blue sensitised photo-oxidation of 2-dimethylamino-5,6-dimethylpyrimidin-4-ol (I) in deuterochloroform/deuteroacetone have been investigated. A zwitterion and a hydroperoxide are formed initially, with the zwitterion predominating. The zwitterion compound degrades or reacts in the solid state on silica gel to give further products.  相似文献   

The use of incidence counts for estimation of cereal aphid populations. 3. Population development and the incidencedensity relation     

S. A. Ward  K. D. Sunderland  R. J. Chambers  A. F. G. Dixon 《European journal of plant pathology / European Foundation for Plant Pathology》1986,92(4):175-183

The relation between the population density of the cereal aphid,Sitobion avenae, and the proportion of wheat tillers infested is examined. Three of the six models considered require the assumption that the aphids' spatial configuration can be described by a single statistical distribution; as this is not true forS. avenae these models are unsuitable. When the other three models were applied to field sample data, only that of Nachman (1981) yielded a regression equation that remained constant throughout the development of the aphid population.Samenvatting Om in de praktijk gebruik te kunnen maken van incidentie (de fractie bezette halmen) voor het schatten van graanluispopulaties moet dezelfde relatie tussen dichtheid en incidentie tijdens het hele groeiseizoen gelden. Uit analyses van veldgegevens voor de graanluisSitobion avenae blijkt dat wel het geval te zijn, zodat bepalingen van incidentie kunnen worden gebruikt om de populatiedichtheid betrouwbaar te schatten.  相似文献   

Coordinate expression of matrix-degrading proteinases and their activators and inhibitors in bovine skeletal muscle   总被引：3，自引：0，他引：3  

Balcerzak D  Querengesser L  Dixon WT  Baracos VE 《Journal of animal science》2001,79(1):94-107

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