Oesophageal hiatal hernia in two cats     

D. R. Waldron  M. Moon  M. S. Leib  D. Barber  K. Asbury Mays 《The Journal of small animal practice》1990,31(5):259-263

Sliding oesophageal hiatal hernia was diagnosed radiographically in two domestic short-haired cats. The hernias were corrected by hiatal tightening, modified Nissen fundoplication and permanent gastropexy. One cat recovered without complication, and the other developed severe necrotic gastritis following surgery. Both cats were asymptomatic and had normal radiographic studies nine months and one year after surgery.  相似文献   

Assortative mating as a mechanism for rapid evolution of a migratory divide     

Bearhop S  Fiedler W  Furness RW  Votier SC  Waldron S  Newton J  Bowen GJ  Berthold P  Farnsworth K 《Science (New York, N.Y.)》2005,310(5747):502-504

There have been numerous recent observations of changes in the behavior and dynamics of migratory bird populations, but the plasticity of the migratory trait and our inability to track small animals over large distances have hindered investigation of the mechanisms behind migratory change. We used habitat-specific stable isotope signatures to show that recently evolved allopatric wintering populations of European blackcaps Sylvia atricapilla pair assortatively on their sympatric breeding grounds. Birds wintering further north also produce larger clutches and fledge more young. These findings describe an important process in the evolution of migratory divides, new migration routes, and wintering quarters. Temporal segregation of breeding is a way in which subpopulations of vertebrates may become isolated in sympatry.  相似文献   

Assessment of Meiotic Spindle Configuration and Post‐Warming Bovine Oocyte Viability Using Polarized Light Microscopy     

JN Caamaño  C Díez  B Trigal  M Muñoz  R Morató  D Martín  S Carrocera  T Mogas  E Gómez 《Reproduction in domestic animals》2013,48(3):470-476

The objectives of this study were to assess the efficiency of polarized light microscopy (PLM) in detecting microtubule‐polymerized protein in in vitro‐matured bovine oocytes; to examine its effects on oocyte developmental competence; and to assess the meiotic spindle of in vitro‐matured oocytes after vitrification/warming and further assessment of oocyte developmental competence. In the first experiment, the presence of microtubule‐polymerized protein (MPP) was confirmed as a positive PLM signal detected in 99.1% of analysed oocytes (n = 115), which strongly correlated (r = 1; p < 0.0001) with the presence of MPP as confirmed by immunostaining. In the second experiment, oocytes (n = 651) were exposed or not (controls) to PLM for 10 min and then fertilized and cultured in vitro. Oocytes exposed to PLM did not significantly differ from controls with regard to cleavage, total blastocyst and expanded blastocyst rates and cell numbers. In the third experiment, meiotic spindles were detected in 145 of 182 oocytes (79.6%) following vitrification and warming. Interestingly, after parthenogenetic activation and in vitro culture, oocytes that displayed a positive PLM signal PLM(+) differed significantly from PLM(?) in cleavage and Day 8 blastocyst rates. These results suggest that polarized light microscopy is an efficient system to detect microtubule‐polymerized protein in in vitro‐matured bovine oocytes and does not exert detrimental effects on bovine oocyte developmental competence. Moreover, PLM could be used as a tool to assess post‐warming viability in vitrified bovine oocytes.  相似文献   

Suspected Lythrum hyssopifolia (lesser loosestrife) poisoning of cattle     

JN Tran  P‐J Yang  AG Morton  AA Todd  JG Boulton  AW Philbey 《Australian veterinary journal》2013,91(11):474-476

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Evaluation of homologous and heterologous protection induced by a virulent field strain of orf virus and an orf vaccine in goats     

Musser JM  Waldron DF  Taylor CA 《American journal of veterinary research》2012,73(1):86-90

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Vegetation structure and the habitat specificity of a declining North American reptile: A remnant of former landscapes     

Jayme L. Waldron  Shane M. Welch 《Biological conservation》2008,141(10):2477-2482

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Gastric squamous cell carcinoma in three horses     

EC McKENZIE  JN MILLS  JR BOLTON 《Australian veterinary journal》1997,75(7):480-483

Gastric squamous cell carcinoma was diagnosed in three horses. Clinical signs observed in all cases were weight loss, anorexia and lethargy. Respiratory signs were prominent in one case. All three horses had depressed albumin and elevated globulin and fibrinogen concentrations. Two horses were mildly anaemic. Inflammatory exudates were present in peritoneal cavities in all cases, and cytological evaluation provided a positive diagnosis of squamous cell carcinoma in two cases. Pleural fluid samples taken from two cases were also classified as inflammatory exudates, but no neoplastic cells were detected on initial examination. In all cases the neoplasms had arisen from the oesophageal region of the stomach, and had metastised throughout the abdomen. Two cases had metastatic lesions within the pleural cavity.  相似文献   

Factors associated with the development of equine degenerative myeloencephalopathy     

S G Dill  M T Correa  H N Erb  A deLahunta  F A Kallfelz  C Waldron 《American journal of veterinary research》1990,51(8):1300-1305

A case-control study was done to identify factors associated with the development of equine degenerative myeloencephalopathy (EDM). Questionnaires were mailed to the owners of 146 horses admitted to the New York State College of Veterinary Medicine between November 1978 and June 1987 and diagnosed as having EDM by histologic examination. Questionnaires also were sent to owners of 402 clinically normal horses admitted to the college during the same period. Data were compared between the EDM-affected and control groups (56 and 179 questionnaires returned, respectively). Risk factors identified included the use of insecticide applied to foals, exposure of foals to wood preservatives, and foals frequently spending time on dirt lots while outside. Foals spending time outside on green pastures was a protective factor. Foals from dams that had had an EDM-affected foal were at higher risk of developing EDM than were foals from other dams.  相似文献   

Intermittent gastroesophageal intussusception in a cat with idiopathic megaesophagus     

Martínez NI  Cook W  Troy GC  Waldron D 《Journal of the American Animal Hospital Association》2001,37(3):234-237

An adult female domestic shorthair cat was evaluated for chronic upper respiratory disease and vomiting. A diagnosis of idiopathic megaesophagus with intermittent gastroesophageal intussusception (GEI) was made based on radiographic and endoscopic examinations. The GEI was manually reduced by use of a stomach tube during the endoscopic procedure. An incisional gastropexy was performed to prevent recurrence. Gastroesophageal intussusception is a rare condition in cats. In dogs it is usually associated with rapid progression of clinical signs, culminating in death. In this cat, the condition was associated with chronic signs, probably due to the intermittent nature of the GEI.  相似文献   

Different in-planta and ex-planta activities of 7-chloro-4-(2-[trifluoromethyl]phenoxy)quinoline against Pyricularia grisea due to volatilization     

Mark A. Schneegurt  Clive Waldron 《Pest management science》1991,33(2):177-188

7-Chloro-4-[2-(trifluoromethyl)phenoxy]quinoline (L Y248908) strongly inhibits mycelial growth of Pyricularia grisea in ex-planta assays but, when applied to the foliage of rice seedlings, its protective and curative properties against P. grisea are poor. The principal cause for this difference was found to be volatilization of LY248908 from treated foliage. Variations in fungal sensitivity (due to strain or development stage) and compound loss due to translocation, sequestration, metabolism, or degradation were shown not to be significant.  相似文献