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1.
鹦鹉是雌雄单态的鸟类之一,从外观上难以直接对它们的性别做出判断。鹦鹉以其靓丽的羽毛以及能够模仿人类语言等特点,被大多数人欣赏和爱护,因而经常被人们作为宠物饲养。鹦鹉性别鉴定,尤其是幼鸟时期的性别鉴定意义重大,是开展鹦鹉育种、濒危鹦鹉物种保护工作以及进化研究的基础。总结了目前鹦鹉性别鉴定的常用技术与方法,在立足于雌雄鸟类自身激素分泌不同的基础之上,为鹦鹉性别鉴定方法提出了新的构想,旨在为鹦鹉性别鉴定以及育种工作提供新的思路。  相似文献   

2.
The hypothesis is advanced that various combinations of aetiologically different events may lead to three different, but common, clinical manifestations of feline lower urinary tract disease. One manifestation, characterised by nonobstructive haematuria, dysuria, pollakiuria, and increased production of proteinaceous and cellular inflammatory reactions occurs as a consequence of urinary tract infections with viruses and occasionally other infectious agents. A second manifestation is that of classical urolithiasis, which occurs in response to oversaturation of urine with different types of calculogenic substances. Naturally occurring feline uroliths containing magnesium ammonium phosphate, calcium oxalate, ammonium urate, calcium phosphate, cystine and xanthine have been observed. A third manifestation, resulting from the concomitant occurrence of urinary tract infections and various types of urine crystals, is characterised by formation of matrix-crystalline plugs that may obstruct the urethra, especially of male cats. Preliminary data suggest that urethral plug matrix contains Tamm-Horsfall mucoprotein, similar to that observed involved in the formation of renal tubular casts.  相似文献   

3.
Silica uroliths were first recognized in dogs in the mid 1970s. Currently available data suggest that dietary factors may play a role in their pathogenesis. Diagnosis is facilitated by their typical jackstone appearance but must be verified by quantitative analysis. Surgery is the only feasible method of treatment.  相似文献   

4.
The aim of this study was to describe the normal ultrasonographic appearance of the iliopsoas muscle and related landmarks. Hind limbs of five dog cadavers with no history of lameness were evaluated. The origin and mid-body of the psoas major and the common insertion of the iliacus and psoas major on the lesser trochanter of the femur were identified and evaluated. New methylene blue was injected under ultrasonographic guidance at the three sites. Dissection was performed to confirm placement of the dye. The L3 origin, mid-body, and insertion of the muscle were identified in all dogs and were consistent in appearance and compatible with the general appearance of muscle and tendons. The L2 origin was consistently difficult to image. The same ultrasound technique was subsequently applied to four healthy dogs, and consistent images of the iliopsoas muscle and associated landmarks were obtained. In this study, the major structures of the iliopsoas could be identified and in all dogs had a similar appearance. Ultrasound is an important tool for the diagnosis of musculotendinous injury and may be useful for identification of ilipsoas injury as a cause of lameness in the dog.  相似文献   

5.
Pancreatic disorders in dogs and cats are recognized with increasing frequency, and abdominal ultrasonography has assumed an important role in their diagnosis. The normal pancreas is a small, inconspicuous organ of comparable echogenicity to surrounding mesentery and may be difficult to identify. Therefore, knowledge of anatomic landmarks such as portal vein and contributing vessels, duodenum, and stomach is necessary to facilitate identification and examination. Pancreatic diseases and abnormalities frequently investigated by means of ultrasonography include pancreatitis, pseudocysts, abscesses, neoplastic lesions, and nodular hyperplasia. Disorders less commonly seen include exocrine pancreatic insufficiency, pancreatolithiasis, congenital anomalies, and pancreatic edema. Unfortunately, ultrasonographic findings in various pancreatic disorders overlap, and incidental findings or age-related changes may mimic pancreatic disease. On the other hand, pancreatic disorders may not cause changes in ultrasonographic appearance. Ultrasonographic findings, therefore, have to be judged in light of signalment, history, and laboratory data. Cytology or histopathology may be needed to establish a definite diagnosis. Despite these limitations, ultrasonography is useful in diagnosing pancreatic disease, guiding aspirates and biopsies, and monitoring response to treatment.  相似文献   

6.
One hundred strains of Corynebacterium equi were examined using standard laboratory procedures. Variations in colonial morphology were noted. The ability to reduce nitrate and to produce urease was shown to be valuable for confirmation of identification of C. equi. Production of hydrogen sulphide was a variable characteristic of C. equi. It is concluded that for those situations where the source of the organism gives no clue as to its identify, positive identification of C. equi may be difficult because of variability in colonial appearance and biochemical reactions.  相似文献   

7.
A number of plants are capable of producing intoxication of sufficient severity as to cause death within 12 hours of the onset of clinical signs. Those most rapid in their lethal effects are the cyanogenic plants and yew. Nitrate-accumulating plants likewise are capable of causing sudden death with only a brief appearance of signs. Most toxic plants, however, typically either require a longer time for the intoxication to develop and become lethal or sudden death is the exception rather than the rule following ingestion. In these cases, diagnosis of the problem may be facilitated by recognition of arrays of clinical signs that appear. Seven major groups of presenting signs can be distinguished: dyspnea and polypnea, hemorrhage, prominent excessive muscular activity, depression and/or weakness, diarrhea and weakness, excessive salivation and/or regurgitation and/or colic, and weakness and incoordination and/or tremors. Based on these and accompanying signs in surviving animals, many of the causes of sudden death can be differentiated. In addition, pathological changes visible on necropsy and identification of plant fragments in the rumen and stomach may be of diagnostic value.  相似文献   

8.
Abdominal vasculature can be evaluated non-invasively using 2-D ultrasound imaging and Doppler ultrasonography.5,6,12 The identification of abdominal vessels using ultrasound is based on knowledge of their normal location, appearance and relationship to specific organs. Because anatomic location of major abdominal vessels is fairly consistent, finding and following vessels is a useful aid when attempting to locate and evaluate juxta-vascular organs. Sonographic vascular evaluation may be beneficial in providing information regarding central cardiovascular abnormalities, detection of abnormalities involving the vessel interrogated, or detection of abnormalities of the parenchymal bed that the vessel supplies,5–12 Knowledge of the location and appearance of the vessels is necessary for this information to be of diagnostic value.
In this paper, abdominal vessels in the dog are reviewed and a sonographic map of major abdominal vessels is described. This includes the sonographic appearance of the aorta, caudal vena cava, and portal vein, their major branches and their anatomic relationship with adjacent organs.
Identification of the medial iliac lymph nodes, mesenteric lymph nodes, abdominal esophagus, duodenum, spleen, kidneys, pancreas, adrenal glands and liver lobes are assisted by recognizing specific vascular landmarks. The locations and appearances of pertinent organs as pertains to abdominal vasculature (caudal vena cava and aorta) are described.  相似文献   

9.
Ultrastructure of canine, feline, and bovine mast cell neoplasms   总被引：1，自引：0，他引：1  
Biopsy specimens were collected from skin or spleen from 8 dogs, 7 cats, and 1 cow with mast cell neoplasms. Following histopathologic grading, the neoplasms were examined by transmission electron microscopy with the intention of reviewing their fine structure and recording new findings. For 2 feline specimens, short-term cell cultures were established, and adherent cells were fixed in situ and examined with the electron microscope. In addition to the usual array of mast cell organelles, including Golgi apparatus, secretory granules, mitochondria, vesicles, tubules, microfilaments, and ribosomes, important findings included coarse interdigitation of cytoplasmic projections between adjacent mast cells; intracytoplasmic parallel stacks of 10 nm diameter filaments as well as parallel arrays of coarse, 120 to 150 nm diameter tubules; the appearance of coated vesicles and caveolae on cell surfaces; the appearance of endocytosed erythrocytes; and the formation of giant secretory granules.  相似文献   

10.
The isolation and identification of Yersinia enterocolitica from minced meat on CIN agar medium is still one of the major problems in food microbiology because of the low selectivity of cefsulodin-irgasan-novobiocin (CIN) agar. A total of 198 minced meat samples were collected from commercial establishments (butcher shops and supermarkets) in seven German cities in order to investigate the sensitivity and specificity of three identification techniques suitable for the differentiation of Y. enterocolitica within the rich background flora on CIN agar plates. As expected isolation of Y. enterocolitica from minced meat on CIN agar medium after 72 h enrichment in peptone, sorbitol and bile salts (PSB) broth was difficult because all plates were abundantly covered with numerous 'typical'Yersinia-like colonies of bull's eye appearance as well as with atypical colonies. Based on the phenotype of the colonies it was possible to detect colonies showing Yersinia-like growth on CIN agar in 52 samples (26%). For identification of Y. enterocolitica the API 20E system (bioMerieux, Nürtingen, Germany), the Yersinia identification kit (Merlin, Bornheim-Hersel, Germany) and a 16S rRNA based PCR assay were compared. Only in one sample (0.5%) a Y. enterocolitica strain was detected by all methods. Of the three identification systems tested for routine laboratory diagnostics the API 20E system was found to be the most suitable tool to identify Y. enterocolitica colonies within the rich background flora from minced meat samples on CIN agar plates.  相似文献   

11.
Objective— To report the diagnosis and treatment of a branchial apparatus anomaly (BAA) associated with a mandibular malformation in a foal.
Design— Clinical report.
Animal— Haflinger foal.
Methods— A 6-day-old foal had a fluctuating cystic mass in the pharyngeal (throatlatch) region, which changed in appearance after ingestion of milk. Upper airway endoscopy and diagnostic imaging (ultrasonography, radiography, computed tomography) permitted identification of the anatomic location of a communicating tract between the lumen of the cystic mass and the pharynx. The mass was surgically removed and communication with the pharynx ligated. Histologic appearance of this mass was consistent with a branchial cyst or sinus. The mandibular malformation was managed conservatively.
Results— Surgical resection of a third branchial sinus resulted in an excellent functional and cosmetic outcome. There was no evidence of any mandibular deformity 2 years later.
Conclusion— BAA may induce secondary mandibular deformation in utero and may cause respiratory compromise postpartum. Careful surgical dissection and removal of BAA resulted in an excellent outcome.
Clinical Relevance— BAAs should be included in the differential diagnosis of a throatlatch region mass in equine neonates. Complete surgical excision is recommended and full recovery of any associated mandibular deformity may be anticipated without additional treatment in very young patients.  相似文献   

12.
Plain and myelographic studies were carried out on 28 dobermanns clinically affected with cervical spondylomyelopathy. The radiographic appearance identified was compared with that found in studies of 24 similar sized dogs of other breeds, and also 115 mature dobermanns clinically normal at presentation. Twenty-eight of these clinically normal dobermanns were considered to possess radiographic changes similar to those identified in the affected animals. During the next five years 20 (71-8 per cent) of the animals developed signs of cervical spondylomyelopathy. The remaining 87 dobermanns are considered by their owners to have remained normal. It is suggested that careful radiographic assessment offers a real basis for the identification of potential ‘wobblers’. It also offers a means of identifying sound breeding stock as one method of reducing the incidence of an increasingly serious multifactorial disease.  相似文献   

13.
Guidelines for the identification of potential legal cases and the correct procedures for recording and handling of information and exhibits are described. Preparation for court appearance as an expert witness is discussed.  相似文献   

14.
The objective of this study was to investigate changes occurring in μ/m‐calpain in post mortem chicken muscles and to determine the origin of the unknown bands found in calpain casein zymography. The unknown bands were reported with slightly greater mobility compared to conventional μ/m‐calpain bands in casein zymography. Identification of these bands was accomplished using native polyacrylamide gel electrophoresis, liquid chromatography tandem mass spectrometry and with protein phosphatase treatment. Results showed that the unknown bands were corresponding to μ/m‐calpain, and dephosphorylation by protein phosphatase did not change their appearance. The calpain samples were then incubated with various concentrations of Ca2+ to determine the relationship between changes in μ/m‐calpain and the appearance of the unknown bands. The products of μ/m‐calpain partial autolysis were found to be consistent with the appearance of the unknown bands. Therefore, the appearance of these bands did not result from phosphorylation of μ/m‐calpain as previously hypothesized, but from partial autolysis of μ/m‐calpain. Also their presence suggests that μ/m‐calpain undergoes partial autolysis during aging which may play certain roles in meat quality improvement.  相似文献   

15.
ULTRASONOGRAPHY OF THE NORMAL CANINE GASTROINTESTINAL TRACT   总被引：1，自引：0，他引：1  
The normal sonographic appearance of stomach, small bowel, and colon was determined in normal dogs of small, medium, and large breeds. In all dogs studied, the stomach wall ranged from 3 mm to 5 mm in thickness, and the small and large bowel wall ranged from 2 mm to 3 mm in thickness. Peristalsis was routinely observed in the stomach and small bowel, but not in the colon. Ultrasonic identification of five gastrointestinal wall layers corresponding to the mucosal surface, mucosa, submucosa, muscularis propria, and subserosa/serosa was possible. Specific segments of the gastrointestinal (GI) tract were isolated and scanned in a water bath. In one dog, ultrasonic and histologic findings were compared and confirmed the anatomical identification found with ultrasound. Similarities and differences between the ultrasonic appearance of the GI tract of humans and small animals are discussed.  相似文献   

16.
The aim of this study was to monitor the postnatal radiographic development of the proximal and distal double contours and the modelling of the shape of the proximal articular border. In mature horses, the proximal and distal contours of the navicular bone on dorsopalmar dorsoproximal-palmarodistal oblique (upright pedal) radiographs are commonly visualised as 2 lines, one being the articular border and the second representing the border of the cortex facing the deep digital flexor tendon (flexor border). The shape of the proximal articular border may be concave, undulating, straight or convex in the mature animal. These shapes have been found to be hereditary and to constitute a predisposing factor in the pathogenesis of navicular disease. This predisposing role may result from a shape dependent distribution of the biomechanical forces exerted on this region. There is no agreement in the literature with respect to the moment when the navicular bone takes its mature radiographic appearance. Upright pedal radiographs of the left front foot of 19 Dutch Warmblood foals were made at age 1 month and subsequently at intervals of 4 weeks, until the age of 11 months. The distal double contour developed soon after birth and the radiographic visibility of the articular border improved from ill-defined at 1 or 2 months to clear manifestation at 3 or 4 months. The proximal double contour developed later. The articular border became usually visible at age 3 or 4 months and was clearly visible from age 9 months. The mature shape of the proximal articular border usually became recognisable from age 7 months and was always obvious between 9 and 11 months. This development was associated with a gradual modelling of the lateral and medial extremities of the navicular bone. It was concluded that the navicular bone adopts its mature radiological appearance during the first year postpartum. Considering this early manifestation of the mature shape of the proximal articular border and its previously demonstrated inheritance, a force-dependent development of this shape, as predicted by the trajectional theory/Wolffs law, is improbable. The predisposing role of this shape in the pathogenesis of navicular disease may therefore be explained by a shape-dependent distribution of the biomechanical forces exerted on the navicular bone. Considering the potential application of these findings, from age 1 year shape determination enables identification of the individual and breed susceptibility for the development of navicular disease.  相似文献   

17.
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18.
A 9-year-old gelding presented with approximately 100 papillomas that covered about 75% of the distal penis. Biopsy was performed, and histology showed evidence of viral cytopathic change and koilocytosis. Polymerase chain reaction using DNA extracted from biopsied tissue amplified equine papillomavirus type 2 (EcPV-2) DNA sequences. Sixteen months later, the horse was re-examined and the appearance of the papillomas was unchanged. Equine papillomavirus type 2 DNA sequences were again amplified from both biopsied tissue and swabs of the penis. Papillomavirus was localized to the lesions by immunohistochemistry and in situ hybridization. An examination 2 years after the initial presentation revealed no detectable change in the appearance of the penis. The large number of papillomas and their failure to regress over an extended period support a clinical classification of papillomatosis. To the authors' knowledge, this is the first report of papillomatosis of the equine penis. This novel clinical manifestation suggests that persistent EcPV-2 infection is possible in horses. As there is evidence that EcPV-2 may promote development of equine penile squamous cell carcinoma, understanding the natural history of EcPV-2 infections may be important in preventing equine penile neoplasia.  相似文献   

19.
Primary cardiac granular cell tumor in a dog   总被引：1，自引：0，他引：1  
The histological, histochemical, and ultrastructural features of a granular cell tumor in the wall of the right atrium of the heart in a nine-year-old dog are described. The histologic appearance of the mass varied from areas of spindle-shaped cells to sheets of globoid cells with foamy granular cytoplasm. The globoid neoplastic cells contained numerous cytoplasmic granules which were variably positive to periodic acid-Schiff staining, with and without disastase digestion. Ultrastructurally, the globoid cells had numerous various-sized, heterogeneous lysosomes with pleomorphic content. A granular cell tumor originating in the heart has not been reported previously in animals. The support for a neural origin of these tumors by the recent identification of several nervous tissue specific proteins in their granular cells is discussed.  相似文献   

20.
从兽用化学药品的命名、红外鉴别、外观性状、有关物质等多个方面对近些年新兽药注册检验中常遇到的问题进行了总结分析,以期对申报企业的注册申请有所帮助。  相似文献   

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