共查询到20条相似文献，搜索用时 31 毫秒
1.
C Uhlinger C Johnstone 《Journal of the American Veterinary Medical Association》1985,187(12):1362-1366
A survey was conducted to determine the prevalence of benzimidazole (BZ)-resistant small strongyles in horses in a southeastern Pennsylvania practice. Resistant parasites were found in 291 of 342 horses surveyed. Anthelmintic practices and pasture management factors in use for 3 to 6 years did not correlate with the presence of resistant small strongyles. Benzimidazole-resistant small strongyles were recovered in horses that had been treated alternately with BZ and non-BZ products and in horses receiving BZ products as infrequently as twice a year. However, inasmuch as the horses may have been infected with resistant small strongyles before the various anthelmintic schedules were implemented, it was not possible to attribute BZ-resistance to any particular pattern of drug use. Fifty-one (14.9%) horses had BZ-susceptible small strongyles: these horses were on poor overall parasite control programs and had received BZ products no more than once a year. Benzimidazole-piperazine and non-BZ drugs were effective in herds infected with BZ-resistant small strongyles. 相似文献
2.
Poorly differentiated rectal carcinoid in a cow 总被引：1，自引：0，他引：1
Michishita M Takahashi K Moriya H Nakamura S Koyama H Sako T 《Veterinary pathology》2007,44(3):414-417
3.
Dozens of red, raised nodules scattered along the serosal surface of the small intestine and the right and left ovaries were observed as incidental findings on gross examination in a 21-year-old Thoroughbred mare euthanatized for severe lameness. Histologically, these nodules were composed of numerous, variably sized, redundant vascular profiles filled with red blood cells and fibrin thrombi. Based on the presence of multiple nodules composed of benign vascular channels scattered within the small intestine and ovary, a diagnosis of angiomatosis is proposed. To the authors' knowledge, this is the first report of small intestinal and ovarian angiomatosis in a horse. 相似文献
4.
J P Held P Prater M Stettler 《Journal of the American Veterinary Medical Association》1991,199(12):1760-1761
A 9-year-old Arabian stallion with a 3-year history of infertility was evaluated for breeding soundness. Both testes were small. Ultrasonography revealed a small amount of free fluid between the tunics of both testes. Results of cytologic examination of the fluid were unremarkable. On semen examination, progressive motility was 10%, and total number of spermatozoa in the ejaculate was 6.6 x 10(9), of which 92% were abnormal. Predominant abnormalities were head defects (75%): 57% of the heads had single or multiple vacuoles, and 60% also had midpiece swelling or bending. 相似文献
5.
H D Lehmkuhl R C Cutlip B M DeBey 《Journal of veterinary diagnostic investigation》1999,11(6):485-490
Virus isolated from the lung, liver, kidney, and small intestine of a 3-month-old Holstein heifer with a clinical history of pneumonia and lesions in multiple organs was identified as an adenovirus on the basis of morphological and physicochemical characteristics. The adenovirus was determined to be a serotype 10 bovine adenovirus and represents the first reported isolation of this serotype in the United States. Inoculation of calves with this isolate resulted in mild to moderate clinical response consisting of fever, inappetence, increased respiratory rate, cough, and listlessness. Gross lesions were minimal in the respiratory tract and consisted of fibrin in the airways and small areas of consolidation in the cranial lobes of the lung. Mucofibrinous foci were present on the mucosa of the upper small intestine. 相似文献
6.
Sections of the small intestine were taken under general anaesthesia from a normal calf and from a calf with enteric colibacillosis and examined by scanning electron and light microscopy. In the normal calf villi were long and oval throughout the intestine and in the challenged calf there was villous stunting and fusion in the distal small intestine. 相似文献
7.
Van Dijk AJ Niewold TA Nabuurs MJ Van Hees J De Bot P Stockhofe-Zurwieden N Ubbink-Blanksma M Beynen AC 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2002,49(2):81-86
The purpose of this study was to test whether dietary spray-dried porcine plasma (SDPP) in early-weaned piglets prevents small intestinal villus atrophy by trophic or protective activity. Fifty-four weaned, 18-day-old piglets were used to determine the effect of dietary SDPP on small intestinal villus length, crypt depth, enterocyt mitotic activity and brush border enzyme activities during the first week after weaning. The piglets were offered a diet containing either 8% SDPP or 8% casein. At 2 and 7 days after weaning, piglets were anaesthetized to provide samples of the small intestinal wall and killed immediately afterwards. There were no differences in daily gain and daily feed intake between the two dietary treatments. At day 2 after weaning, all piglets showed a marked reduction in villus height when compared with baseline values. In all piglets, small intestinal enterocyte mitotic activity had decreased by day 2 and was increased again on day 7. There were no significant effects of dietary SDPP on small intestinal villus length, crypt depth and enterocyt mitotic activity. This indicates that SDPP has no trophic effect on the small intestinal mucosa and that it does not protect against the damaging effect on the small intestinal villi that is associated with the process of weaning. There was no effect of SDPP on lactase-, sucrase- or maltase-specific activities that are a measure of the digestive function of the small intestine. It can be concluded that SDPP versus casein has no effect on small intestinal morphology and disaccharidase activities in early weaned piglets kept under low infection pressure. 相似文献
8.
A 6-week-old Staffordshire Bull Terrier cross was presented with a 4-week history of vomiting and small bowel diarrhoea. Abdominal ultrasound showed thickening of the distal jejunum and ileum. The dog underwent two exploratory laparotomies, during which grossly abnormal sections of intestine were resected. The patient developed septic peritonitis 48 h after the second surgery, caused by dehiscence of an intestinal anastomosis, and was euthanased. All intestinal tissue samples were examined histopathologically and a diagnosis of gastrointestinal ganglioneuromatosis was made. Intestinal ganglioneuromatosis is rare and this case represents a novel occurrence in the small intestine of a dog. 相似文献
9.
MICHELLE L. HAVEN DVM JAMES B. ROTTMAN DVM KARL F. BOWMAN DVM MS Dipiomate ACVS 《Veterinary surgery : VS》1991,20(5):320-322
A leiomyoma of the small colon was discovered incidentally in a 4-year-old Thoroughbred gelding during colic surgery to correct large colon displacement. The mass and 20 cm of small colon were resected, and an end-to-end anastomosis was performed. A postoperative fecal impaction proximal to the anastomosis responded after 5 days to administration of intravenous fluids, analgesics, and stool softeners. 相似文献
10.
The clinical, radiological, and pathological features of a polyostotic cystic bone lesion in a 9-month-old Doberman Pinscher are described. The patient was diagnosed as having nutritional secondary hyperparathyroidism at 6 weeks of age and after dietary correction it remained clinically normal until 9 months when there was sudden left hind-limb lameness due to a pathological fracture through a cystic lesion in the distal femur. Radiography revealed additional cystic structures in the metaphyses of the left radius, and left and right tibia. Pseudofractures were associated with two of the cystic lesions.
In some areas the cysts were crossed by trabeculae and in others there were bony ridges on the inner cystic wall. The cavities were lined with flesh-coloured fibrillar material which formed a lacy network extending into cavities. Histologically, multiple small cysts were present adjacent to the larger cavities noted radiographically. The secondary spongiosa and the metaphyseal periosteum were the major abnormal tissue sites. The small cysts appeared to arise in an oedematous and congested metaphyseal spongiosa. The cysts were accompanied by small foci of intense osteoclasis but unattended by compensatory bone production, and the consequent possibility of pseudofractures is an important clinical consideration. Earlier reports demonstrated that resolution of the lesions will follow surgical drainage and curettage of the cystic cavity. Of six cases of polyostotic cystic bone lesions observed in the dog, five were in the Doberman Pinscher breed. 相似文献
In some areas the cysts were crossed by trabeculae and in others there were bony ridges on the inner cystic wall. The cavities were lined with flesh-coloured fibrillar material which formed a lacy network extending into cavities. Histologically, multiple small cysts were present adjacent to the larger cavities noted radiographically. The secondary spongiosa and the metaphyseal periosteum were the major abnormal tissue sites. The small cysts appeared to arise in an oedematous and congested metaphyseal spongiosa. The cysts were accompanied by small foci of intense osteoclasis but unattended by compensatory bone production, and the consequent possibility of pseudofractures is an important clinical consideration. Earlier reports demonstrated that resolution of the lesions will follow surgical drainage and curettage of the cystic cavity. Of six cases of polyostotic cystic bone lesions observed in the dog, five were in the Doberman Pinscher breed. 相似文献
11.
Pelt DR Fowler JD Leighton FA 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(7):259-263
A spayed female yellow Labrador Retriever was presented to the small animal clinic at the Western College of Veterinary Medicine with an ulcerated, draining mass on the caudal aspect of the right thigh. Multiple small, hairless masses were also present on the thorax and in the flank folds. Fine-needle aspiration and cytological examination revealed well-differentiated mast cells and numerous eosinophils. A diagnosis of multiple cutaneous mast cell tumors was made. The clinical and cytological findings of this case are discussed, as well as the treatment and prognosis for mast cell tumors in general. 相似文献
12.
A 9-year-old Tennessee Walking Horse gelding was presented for diagnosis of the cause of extensive alopecia. Complete hair loss was noted over the head, neck, shoulder, thigh, and proximal limbs, but the trunk, distal limbs, pelvic area, mane, and tail were unaffected. The alopecic areas were visually noninflammatory with no exudate or crust except on the shoulder and along the back, where multifocal patchy areas of alopecia with scales and crust were evident. The horse was slightly pruritic. Microscopically, the hair bulbs, inner and outer root sheaths of inferior segments, and perifollicular regions were infiltrated by small to moderate numbers of small lymphocytes. Similar inflammation was occasionally evident in isthmus follicular walls as well as some apocrine glands. No sebaceous glands were affected. Immunohistochemistry confirmed that the small lymphocytes were CD3(+) T lymphocytes. The epidermis from the skin with scale and crusts along the horse's back exhibited mild to moderate hyperplasia, mild lymphocytic exocytosis, mild eosinophilic dermatitis, and diffuse parakeratosis with numerous budding yeasts, consistent with Malassezia spp. The final disease diagnosis was made as alopecia areata with Malassezia dermatitis. Alopecia areata could be a contributing underlying factor for Malassezia dermatitis. 相似文献
13.
14.
K Jimma Y Wada Y Ishikawa K Kadota 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1999,61(5):577-580
An embryonal rhabdomyosarcoma was found in the pleura of a 2-year-old Holstein cow after first delivery. The most predominant cells in the tumor were relatively small in size, but considerable numbers of more differentiated cells of larger sizes mingled with the small cells. The most differentiated cells were characterized by multinucleation, abundant cytoplasm containing cross-striated fibrils, intense immunoreactivity for desmin, and weak or negative reactivity for vimentin. Such cells, lacking mitotic activity and displaying weak or no reactivity for proliferating cell nuclear antigen, were considered to be malignant counterparts of myotubes or muscle fibers. This neoplasm seems to follow normal skeletal muscle embryogenesis, and to be capable of differentiation into the final stage of muscle development. 相似文献
15.
Morphological and immunological findings of three dogs with primary lymphangiectasia are described and compared with three normal dogs. Scanning electron microscopy showed distended and fused intestinal villi in dogs with intestinal lymphangiectasia, and morphometric evaluation revealed deeper crypts in the small intestine of dogs with intestinal lymphangiectasia. Although plasma cells of all classes were diminished in the cranial parts of the small intestine, there was an absolute and relative increase of immunoglobulin G-containing plasma cells in the caudal small intestine in dogs with intestinal lymphangiectasia. 相似文献
16.
A 12-year-old Appaloosa gelding was referred to the Texas Veterinary Medical Center with a history of chronic diarrhea and weight loss. At necropsy, numerous oval, craterlike ulcers were observed throughout the small intestine. Histologically, these lesions were composed of a neoplastic proliferation of round cells with intracytoplasmic phosphotungstic acid-hematoxylin-positive granules. The tumor cells stained positively for the CD3 antigen and negatively for a B-cell marker. A diagnosis of large granular lymphoma was based on the morphologic and immunohistochemical characteristics of the neoplasm. The postmortem presentation of this case depicted unusual multifocal, ulcerative lymphomatous lesions throughout the small intestine without involvement of the regional lymph nodes. The histologic and ultrastructural morphology of the neoplastic lymphocytes was similar to that in previously reported cases of abdominal equine large granular lymphomas, but in this case the neoplasm was restricted to the small intestine. 相似文献
17.
Lesions of gnotobiotic calves experimentally infected with a calicivirus-like (Newbury) agent 总被引：5，自引：0，他引：5
Fourteen gnotobiotic calves were killed 0.5 to ten days after infection with Newbury agent SRV-1 and the changes in small intestinal structure and function were assessed, qualitatively and quantitatively, by light microscopy, scanning and transmission electron microscopy, enzymology and xylose absorption. The first enterocytes detected as infected by immunoperoxidase were those on the sides of villi at the base. Subsequently exfoliation of degenerate enterocytes resulted in stunted villi; mucosal beta-galactosidase activity fell and there was xylose malabsorption. Small intestinal damage, first detected at 12 hours after infection but almost repaired by ten days, was restricted to the anterior half of the small intestine. In the distal small intestine, where no virus-induced damage occurred, villi lengthened--possibly due to increased mitosis of crypt cells stimulated by enteroglucagon release. 相似文献
18.
Mucopolysaccharidosis VII was diagnosed in a domestic shorthair cat from California. The cat was small and had multiple abnormalities, including a small body disproportionate to the size of the skull, angular deformities of the ribs, abnormally short forelimbs, luxating patellas, generalized epiphyseal dysplasia involving the vertebrae and long bones, cuboidal vertebrae, pectus excavatum, subluxation of both hips, osteosclerosis of the tentorium cerebelli and left petrous temporal bone, tracheal hypoplasia, and corneal clouding. Beta-glucuronidase activity was markedly decreased in peripheral blood leukocytes. The cat died at 21 months of age, and a complete necropsy was performed. Tissues were examined by light and transmission electron microscopy. Large clear, round vacuoles representing distended lysosomes were present in many epithelial and connective tissue cells, including fibrocytes, chondrocytes, smooth muscle cells, hepatocytes, astrocytes, and macrophages. 相似文献
19.
Dopamine was infused intravenously (1, 5 and 10 micrograms/kg/min) for 60 min in three fasted ponies. A dose-dependent increase in heart rate occurred that was rapid in onset and termination at the start and end of the infusions, respectively. Dose-dependent changes in gastric and small intestinal motility were observed. An initial marked inhibition of gastric contraction amplitude was followed by a secondary prolonged period of activity. At the same time the small intestine showed a prolonged period of irregular activity (phase II) and a marked increase in the interval between successive phase IIIs. The left dorsal colon and small colon exhibited variable responses. The normal fasting motility pattern was therefore disrupted by dopamine biphasically, an initial inhibition of the stomach being followed by a period of increased activity in the stomach and small intestine which resembled the postprandial motility pattern. Although the cardiovascular effects of dopamine were transient, the increases in gastrointestinal motility persisted long after the infusion was terminated. 相似文献
20.
Hereditary myopathy in Labrador retrievers: a morphologic study 总被引：6，自引：0，他引：6
Skeletal muscle and peripheral nerve were obtained over several years from 12 Labrador retrievers with signs of hereditary myopathy. Biopsy and necropsy samples were examined by histology and histochemistry. Despite normal findings in peripheral nerves, a wide range of morphologic changes were observed in muscle including features generally considered characteristic of neurogenic disease. These included small and large muscle fiber group atrophy, presence of small angular fibers, and occasional fiber type grouping. Other prominent changes in muscle were increased numbers of internal nuclei, architectural disturbances, type II fiber deficiency, necrosis, regeneration, and fibrosis--all of which are more usually associated with destructive myopathies or muscular dystrophies. The pathology of this condition, therefore, includes features of both neurogenic and myopathic disease, while the underlying pathophysiology remains unclear. 相似文献