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Complement C4 allotype association with and serum C4 concentration in an autoimmune disease in the dog.

Serum C4 concentrations and C4 allotypes were determined wherever possible on eight dogs with an autoimmune disorder characterized by antinuclear antibody (ANA) positivity, pyrexia, and seronegative arthritis. Three of the six dogs tested serially showed hypocomplementemia at disease onset with return to normal concentrations with clinical remission following steroid therapy. All five dogs C4 allotyped were phenotypically identical. The phenotype (C4-4) was significantly increased in the diseased dogs. Thus C4 allotype may provide a marker for susceptibility to development of an autoimmune disorder in the dog. Serum C4 concentrations may help in disease diagnosis and monitoring the effectiveness of therapy.

Animals↗

Bullous autoimmune skin disease in the dog: (2) immunopathological assessment.

The immunological examinations of two cases of pemphigus vulgaris and four cases of bullous pemphigoid in the dog are reported. Deposits of immunoglobulin and complement were identified betweeen epithelial cells of the pemphigus cases and at the epithelial/connectivce tissue junction in the pemphigoid dogs. The bullous autoimmune diseases must be considered in the differential diagnosis of mucosal and skin ulceration in the dog.

Animals↗

von Willebrand's disease in the dog and cat.

Von Willebrand's disease (vWD) is a bleeding disorder that is recognized commonly in dogs but rarely in cats. This article presents the pathophysiology and clinical features of vWD, including a discussion of inherited and acquired types of vWD. Laboratory evaluation and treatment of vWD are reviewed.

Animals↗

Myeloproliferative disease in the dog and cat: definition, aetiology and classification.

The term myeloproliferative disease may be applied to all the non-lymphoid dysplastic and neoplastic conditions arising from the haematopoietic stem cell or its progeny. Thus the chronic and acute myeloid leukaemias, thrombocythaemia, megakaryocytic myelosis, myelofibrosis, the myelodysplastic syndromes and some cases of aplastic anaemia may be viewed as variants of a single disease process. This view is useful in explaining the common occurrence of mixed forms of disease or interconversions between the myeloproliferative diseases. This variability is a consequence of the development of all the haematopoietic lineages from a single class of haematopoietic stem cell by progressive differentiation. The aetiology of the myeloproliferative diseases in the domestic animals is uncertain but feline leukaemia virus infection has been implicated in the cat. These conditions may be classified as aplastic anaemia, as preleukaemic dysplastic conditions with variable cytopenias and morphological abnormalities of blood cells, as smouldering leukaemias, or as leukaemias with a frankly leukaemic blood or bone marrow.

Animals↗

Myeloproliferative disease in the dog and cat: clinical presentations, diagnosis and treatment.

The myeloproliferative diseases may present with a variety of clinical signs including regenerative or non-regenerative anaemias, bleeding diatheses, septicaemia or fever of unknown origin. These signs will raise suspicions of myeloproliferative disease but such disease may also be an incidental finding on routine haematological examination. In either case a bone marrow biopsy will be required for confirmation. Investigation for other causes of anaemia, haemostatic dysfunction or other causes of white cell abnormalities is important in animals where the peripheral blood and bone marrow findings are equivocal or atypical of myeloproliferative disease. Treatment of acute myeloproliferative diseases is presently impractical in veterinary medicine. Therapy of the chronic myeloproliferative diseases depends upon the suppression of the proliferation of the affected clones together with attention to the secondary effects of the disease and to the adverse effects of therapy.

Animals↗

Urinary protein excretion and immunopathologic findings in dogs with glomerular disease.

Clinical and histopathologic findings in 21 dogs with glomerular disease were reviewed. Diagnoses included amyloidosis, glomerulonephritis, and secondary glomerular atrophy. Dogs with amyloidosis excreted the largest amount of urinary protein per day, and 5 of 6 so affected had clinical signs of advanced renal disease at the time of examination. Dogs with glomerulonephritis excreted significantly less urinary protein per day, and none had clinical signs of advanced renal disease at the time of examination. The magnitude of proteinuria was correlated more with the nature of the glomerular lesion than with the stage of renal disease.

Amyloidosis↗

A mucocutaneous disease in the dog, resembling pemphigus vulgaris in man.

A chronic mucocutaneous disease was diagnosed in 3 dogs. Clinically, the disease was characterized by erosions and ulcerations of the oral mucosa, various mucocutaneous junctions, and the skin. Histologically, there was acantholysis or a separation of the epithelial cells from one another, resulting in the formation of clefts and bullae. Based on clinical and laboratory findings, the disease seemed to be the canine equivalent of pemphigus vulgaris (PV) in man.

Acantholysis↗

Aetiology and diagnosis of persistent nasal disease in the dog: a retrospective study of 42 cases.

Forty-two dogs with a history of persistent nasal disease were evaluated by a combination of clinical examination, thoracic and nasal radiography, retroflexed endoscopy and biopsy, and anterograde rhinoscopy and blind nasal biopsy. A definitive diagnosis was made in 91 per cent of cases. Neoplasia was the most common diagnosis (33 per cent of cases), followed by inflammatory rhinitis (24 per cent). Other diagnoses included periodontal disease (10 per cent), aspergillosis (7 per cent) and foreign bodies (7 per cent). Adenocarcinoma was the most common tumour diagnosed. The clinical findings were found to be too variable to be used as specific diagnostic criteria. Anterograde rhinoscopy and retroflexed endoscopy had higher specificity and sensitivity than radiology for the diagnosis of neoplasia, inflammatory rhinitis, aspergillosis and foreign bodies. With a systematic approach to the investigation of persistent nasal disease, a definitive diagnosis can be successfully obtained in the vast majority of cases.

Adenocarcinoma↗

Usefulness of hemilaminectomy for cervical intervertebral disk disease in small dogs.

Hemilaminectomy was performed to treat cervical disc disease in 18 small dogs. Cervical spinal cord compression was characterized by ventral and/or lateral compression on myelograms. The duration of follow-up examinations ranged from 2 to 72 months. The optimal response time after surgery ranged from 2 days to 3 months. The outcome was determined to be excellent if clinical signs resolved and the dog had completely improved. The outcome was determined to be good if the dog improved, but was not clinically normal or if the degree of the owner's satisfaction was insufficient. Fourteen dogs achieved complete neurologic recovery without complications. One dog was initially neurologically worse after surgery, but ultimately improved to normal neurologic status. These outcomes were judged to be excellent. In the remaining 3 dogs, 2 dogs had relapse of neck pain and one dog remained mildly ataxic. These outcomes were judged to be good. These results suggest that hemilaminectomy is an effective option for surgical treatment of spinal cord compression secondary to cervical disc disease in small dogs.

Animals↗

Immune-mediated skin disease in the dog and cat.

Immune-mediated skin disease was recorded in 24 dogs and 11 cats by the Department of Pathology and Microbiology, University of Bristol, over the period 1973-1992. The clinical and histopathological features, together with the age, breed and sex, are given for each case. Skin biopsies from the 24 dogs in this series, together with tissue from 25 control dogs, were immunostained for IgG, IgM and C3 by direct immunoperoxidase methodology. The same technique, with species-specific antisera for IgG and IgM, was applied to skin biopsies from 10 affected cats. The correlation between clinical features, histopathology and immunohistochemistry is discussed.

Animals↗