1,721,233 research outputs found
Immunohistochemical staining of fixed tissues
No full textImmunohistochemistry is a technique in which the specific interaction between an immunoglobulin and its homologous antigen is visualized on histological sections by a microscopically detectable label. Generally, the label consists of an enzyme, such as peroxidase, alkaline phosphatase, or glucose oxidase that reacts with an appropriate substrate-chromogen solution to produce a specific color at the site of reaction. Several immunohistochemical techniques have been developed and the most important are schematically represented in Fig. 1. In the direct method, the primary antibody is directly labeled with the enzyme. In the indirect method, an enzyme-labeled secondary antibody is directed against the immunoglobulin type of the animal species in which the primary antibody has been raised. Both methods have a relatively low sensitivity and are therefore not frequently used
Gastric Neoplasia
No full textGastric tumors are rare in dogs and cats but should always be considered, particularly in older dogs with chronic vomiting. The most common gastric tumor in dogs is carcinoma, although lymphoma is rare. Breeds that seem to be predisposed to gastric carcinoma are the Rough Collie, Staffordshire Terrier, and Belgian Shepherd. Lymphoma is the most common gastric malignancy in cats. Contrast radiographic examination and endoscopy are the elective procedures of choice for the diagnosis of these conditions. Biopsy is essential to confirm the diagnosis. Surgery is the only potentially curative modality for localized gastric carcinoma. Chemotherapy alone or following surgery is the elective treatment of choice for gastric lymphoma in dogs and cats. The prognosis is poor for both types of tumor, but prolonged survival times in individual animals are possibl
Identificazione immunoistochimica di Mycoplasma Mycoides subsp. Mycoides - osservazioni preliminari
No full textImmunohistochemical detection of papillomavirus structural antigens in animal hyperplastic and neoplastic epithelial lesions
No full textOne hundred and seventy-two hyperplastic and neoplastic epithelial lesions from 8 different mammalian and 1 avian species have been tested with an immunohistochemical technique to detect papillomavirus structural antigens. Selected lesions were diagnosed histologically as papilloma, fibropapilloma, equine sarcoid, squamous cell carcinoma, basalioma, epulis, keratoacanthoma, trichoepithelioma, pilomatrixoma, epidermal inclusion cyst, and hyperkeratotic or acanthotic epidermal lesions. Positive nuclear staining was detected in 14 out of 23 papillomas, 8 out of 32 fibropapillomas and in 1 out of 3 hyperplastic epidermal lesions. Positive samples were found in 5 of 8 mammalian species. Selected samples were also examined by transmission electron microscopy. In 4 samples papillomavirus was seen. In two other samples, negative with immunoperoxidase technique, papovavirus-like particles were observed
Expression of Vimentin in tubular epithelium of bovine kidneys with interstitial nephritis
No full text- …
