Osteochondritis dissecans of the canine stifle joint

In fourteen dogs with osteochondritis dissecans of the stifle joint the lesion was found in the articular cartilage of the medial condyle of the femur in six and the lateral condyle in eight. Both stifle joints were affected in eight dogs and in two of these, both Wolfhounds, the shoulder joints were also affected. Ten dogs were treated surgically and three by conservative means. The results of treatment are discussed.     

Pyloric and oesophageal dysfunction in the cat

The paper describes the symptoms, diagnosis and treatment of pyloric stenosis in thirteen cats, associated in some animals, with megalo-oesophagus.     

Radiological features of intra-nasal lesions in the dog: a review of 100 cases

The radiological changes observed in 100 dogs with confirmed intra-nasal disease are reviewed with particular reference to the differential features of neoplasia, destructive rhinitis and proliferative inflammatory conditions. The contribution of radiographic examination to the diagnosis, treatment and prognosis of these disorders is discussed.     

A taxonomic study of the host ranges of tymoviruses

Published data on the susceptibility of plant species to 18 tymoviruses were collated. These data showed that tymoviruses infected more species from the family of their natural field host than species from other families. The data also indicated that tymoviruses infected a greater proportion of species from the same primary division of the dicotyledons (crassinucellate or tenuinucelate) as their natural host than other species, but the correlation was not statistically significant.
The susceptibility of 18 crassinucellate and 18 tenuinucellate test plant species to 10 tymoviruses was determined. The viruses infected about three times more plant species from the primary taxonomic division that contained the family of their field host than species from the other division; this difference was statistically significant.
The separation of tymoviruses into two groups based on the taxonomic division containing their natural hosts and most of their experimental hosts correlates broadly with a classification of the tymoviruses based on the serological relationships of their particle coat proteins.     

Disorders of urination associated with canine intersexuality

This paper reports disorders of urination in two intersex dogs and reviews 16 previously published similar cases.     

The diagnosis and treatment of cauda equina lesions in the dog

The case details of 46 dogs with cauda equina syndrome are reviewed. The causes were variable and included lumbosacral spondylosis, disc protrusion, discospondylitis, fractures, dislocations and neoplasia. Dogs with discospondylitis generally responded well to prolonged antibiotic therapy but the response to conservative treatment of lumbosacral spondylosis or disc protrusion was transient or incomplete. Ten dogs with cauda equina syndrome were treated surgically; the techniques are described and results presented.     

The radiological features of non-osteogenic malignant tumours of bone in the appendicular skeleton of the dog: a review of thirty-four cases

The clinical features, sites of origin and radiological changes in 34 dogs with 38 histologically proven non-osteogenic malignant tumours of the appendicular skeleton are reported. The incidence of such tumours when compared with the number of osteosarcomas recorded during the same period is much higher than in previously reported series. A wide variety of tumour types was recorded, fibrosarcomas (nine cases), metastatic deposits (eight cases) and haemangiosarcomas (five cases) being the most common. No distinctive features could be related to histological type, but only one tumour in this group demonstrated radiological signs indistinguishable from those previously classified as characteristic of osteosarcoma (Gibbs, Denny & Kelly, 1984). Lung metastases were detected radiographically in approximately 15 per cent of cases. Of eight dogs treated, either by amputation or surgical excision, three are known to have survived without recurrence for more than two years.     

Atlanto-axial subluxation in the dog: a review of thirty cases and an evaluation of treatment by lag screw fixation

The clinical and radiological features of atlanto-axial subluxation in the dog are described with reference to a series of 30 cases. Two methods of treatment were evaluated. In 13 dogs, a dorsal approach was used and the atlas and axis stabilised with a wire suture. Four cases had respiratory arrests during surgery; one of these and seven others made full recoveries after wiring. In 10 dogs treated by lag screw fixation of the ventral articular facets there were no complications during surgery and nine of these recovered within two months. Atlanto-axial subluxation was diagnosed in 30 dogs referred to the Department of Veterinary Surgery, University of Bristol between 1977 and 1986. The condition was encountered in six small breeds of dog and was seen most frequently in the Yorkshire     

Axenic culture of Peridermium pini from single aeciospores

For the first time with a rust fungus, continuously growing axenic cultures have been obtained from single spores. This was achieved with aeciospore sources of the pine stem rust Peridermium pini (Pers.) Lev. from Thetford Forest, East Anglia, but not with sources from north-east Scotland. Approximately 30% of the single spores of two East Anglian sources out of the three tested developed into transferable and subculturable colonies on modified Harvey & Grasham's medium.     

Fungicide Injection for the Control of Dutch Elm Disease

The superiority of the benzimidazole fungicides, and in particularof carbendazim (MBC), over other fungicides was shown by injectionexperiments on both artificially inoculated and naturally infectedyoung elm. With carbendszim the degree of control depended ingreat measure on the formulation, and some evidence was obtainedthat the commercial formulation of carbendazim hydrochloride(Lignasan) produced in 1974 was less effective than an experimentalformulation of the same chemical. Benefits from injection withLignasan were most marked on trees below 25 m in height. Theeffect of various factors such as time of day, season, weatherconditions and tree size on the rate of fungicide uptake areconsidered.