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PubMed Central (PMC3 - NLM DTD) (2,912,109 recursos)
Archive of life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM).

The Canadian Veterinary Journal

Mostrando recursos 13,281 - 13,300 de 14,128

13281. Evaluation of gastrointestinal activity patterns in healthy horses using B mode and Doppler ultrasonography - Mitchell, Colin F.; Malone, Erin D.; Sage, Abby M.; Niksich, Katie
Healthy adult horses were examined by using transabdominal ultrasonography to quantitatively and qualitatively evaluate activity of the jejunum, cecum, and colon with B mode and Doppler techniques. Doppler ultrasound was used to assess jejunal peristaltic activity. Examinations were performed on multiple occasions under imposed colic evaluation conditions, including fasting, nasogastric intubation, and xylazine sedation.

13282. Bile duct carcinoma and nasal adenocarcinoma in a guinea pig - Vannevel, Janice; Wilcock, Brian
A guinea pig with a low grade bile duct carcinoma and nasal papillary adenocarcinoma also had a collagen nevus or lipoma that was considered insignificant in the overall management of the case. The bile duct carcinoma was treated successfully through surgery. The clinical presentation of the adenocarcinoma, which was not treated, is described.

13283. Ovarian remnant syndrome in a 5-year-old bitch - Sangster, Cheryl
A 5-year-old German shepherd bitch was presented with a 3-week history of vaginal bleeding. Ovarian remnant syndrome was diagnosed on vaginoscopy, vaginal cytology, serum progesterone levels, ultrasonography, and exploratory laparotomy. The condition resolved following surgical excision of the remaining ovarian tissue.

13284. Polioencephalomalacia in adult sheep grazing pastures with prostrate pigweed - Ramos, Juan José; Ferrer, Luis Miguel; García, Laura; Fernández, Antonio; Loste, Araceli
Polioencephalomalacia was diagnosed in 2 animals from different farms. In apparently healthy animals from same farms, fecal thiaminase and a significant reduction in erythrocyte transketolase activity was observed. The presence of thiaminase in Amaranthus blitoides could have contributed to the development of polioencephalomalacia in sheep grazing on natural pastures.

13285. Seroprevalence of antibodies against bovine leukemia virus, bovine viral diarrhea virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in dairy cattle in Saskatchewan - VanLeeuwen, John A.; Forsythe, LeeAnn; Tiwari, Ashwani; Chartier, Renee
Blood was drawn from 1530 dairy cows in 51 herds. For antibodies against bovine leukemia virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum, 37.4%, 2.7%, and 5.6% of cows were test positive, respectively, while 29.2% of herds had unvaccinated animals with ? 1:64 for bovine viral diarrhea virus.

13286. Prevalence of Giardia and Cryptosporidium in beef cows in southern Ontario and in beef calves in southern British Columbia - McAllister, Tim A.; Olson, Merle E.; Fletch, Andy; Wetzstein, Merv; Entz, Toby
In 1998 and 1999, fecal samples were collected from 669 beef cows on 39 farms located within 10 counties of Ontario. Overall prevalences of Giardia, Cryptosporidium muris, and Cryptosporidium parvum in cows were 8.7%, 10.6%, and 18.4%, respectively. Of the 39 farms sampled, Giardia was detected on 64%, Cr. muris on 72%, and Cr. parvum on 90%. Cryptosporidium parvum was detected in 28% of the cows in 1998 and in 5.2% in 1999. Differences between the 2 y were attributed to sampling during calving in 1998 and during gestation in 1999. In 1998, Giardia, Cr. muris, and Cr. parvum were...

13287. Effect of administrating oxytocin or prostaglandin F2? on characteristics of the canine ejaculate - Traas, Anne M.; Root Kustritz, Margaret V.
To test the hypothesis that male dogs treated with smooth muscle contracting drugs have an increase in the total number of spermatozoa in the ejaculate but no change in all other ejaculate characteristics, such as progressive motility of spermatozoa or percentage morphologically normal spermatozoa, dogs were treated with oxytocin or prostaglandin F2? (PGF2?) and compared to saline treatments. Semen was collected from each of the 3 dogs once every 3 to 4 d for a total of 6 collections per dog. Ten minutes before each collection, 1 of 3 injections (oxytocin 10 IU [0.5 mL], IM; PGF2? 2.5 mg [0.5...

13288. Myiasis in pet animals in British Columbia: The potential of forensic entomology for determining duration of possible neglect - Anderson, Gail S.; Huitson, Niki R.
Results of a survey of veterinarians in British Columbia included 25 past cases of myiasis and 10 active cases. Most respondents received at least 5 to 10 cases per year, with some as high as 30 per year. This study revealed some advantages and disadvantages of using forensic entomology in living animals.

13289. Unusual vascular ring anomaly in a foal - Smith, Trinity R.
A 2.5-month-old filly was presented with signs of esophageal obstruction. The filly was euthanized and postmortem examination revealed a vascular ring anomaly. The vascular ring anomaly was not caused by a persistent right aortic arch, which is the only vascular ring anomaly reported to occur in horses.

13290. Demographics, management, and welfare of nonracing horses in Prince Edward Island - Christie, Julie L.; Hewson, Caroline J.; Riley, Christopher B.; McNiven, Mary A.; Dohoo, Ian R.; Bate, Luis A.
There are no detailed, representative, horse-level data about equine management practices in different parts of Canada. To help address this, the demographics, management, and welfare of 312 nonracing horses in Prince Edward Island were examined in a randomized, horse-level survey during summer 2002. Owners completed a pretested questionnaire, and a veterinarian examined each horse. Owners were experienced caregivers and the horses were generally in good condition. Areas for improvement included parasite control, dental and hoof care, and tail docking. The mean fecal egg count was 428 eggs per gram; 76% of owners never removed manure from the pasture. Sixty-two percent...

13291. Metastatic anal sac adenocarcinoma in a dog presenting for acute paralysis - Brisson, Brigitte A.; Whiteside, Douglas P.; Holmberg, David L.
A 4-year old, female spayed terrier was referred for hind end paresis that rapidly progressed to paralysis. Spinal radiographs revealed vertebral collapse and bony lysis. Myelography confirmed spinal cord compression and surgical exploration found an extradural soft tissue mass. Metastatic anal sac adenocarcinoma was diagnosed at postmortem examination.

13292. Alimentary lymphosarcoma in a 4-year-old Labrador retriever - Lowe, Andrew D.
Lymphosarcoma, a common canine hematopoietic neoplasm, occurs in multicentric, alimentary, mediastinal, and extranodal forms. Alimentary lymphoma accounts for approximately 5% of cases and is less easily diagnosed than the more common multicentric form. Chemotherapy is often effective, but recent therapeutic advances hold great promise for success in treating canine lymphoma. A 4-year-old, black Labrador retriever was presented (day 1) with a 2-day history of vomiting, polyuria/polydipsia, lethargy, and anorexia. The heart and respiratory rates were within normal limits, and the rectal temperature was 38.9°C. Abdominal splinting was noted on palpation, which elicited urination. No obvious additional abnormalities were detected.

13293. Calcium oxalate urolithiasis in the canine: Surgical management and preventative strategies - Dolinsek, Dana
A 4-year-old, neutered male Chihuahua was presented with inappetance, lethargy, and a tense abdomen attributed to pain. Abdominal radiographs revealed a large cystic calculus and small urethral calculi. Urethral hydropulsion followed by cystotomy were performed successfully. Dietary management was initiated as the primary means of preventing recurrence.

13294. Antibiotic resistance among enterotoxigenic Escherichia coli from piglets and calves from piglets and calves with diarrhea - Hariharan, Harry; Coles, Mada; Poole, Doris; Page, Robert
In vitro resistance to 8 antimicrobials among enterotoxigenic Escherichia coli from piglets and calves over a 13-year period was evaluated. Least resistance occurred against ceftiofur for all, followed by apramycin and gentamicin for porcine and florfenicol for bovine isolates. No significant differences were found between the first 8 and last 5 years.

13295. Idiopathic prolapse of 1 uterine horn in a yearling filly - Schambourg, Morgane A.; Spriet, Mathieu; Piccot-Crézollet, Cyrille; Vaillancourt, Denis
A yearling filly was presented for protrusion of a mass at the vulvar margins. A diagnosis of prolapse of the right uterine horn was made after vaginoscopy, transrectal palpation, and ultrasonography. It was confirmed later by biopsy of the tissue. Recovery was uneventful after easy replacement of the uterine horn.

13296. Treatment of inflammatory airway disease in young standardbreds with interferon alpha - Moore, Ian; Horney, Barbara; Day, Kendra; Lofstedt, Jeanne; Cribb, Alastair E.
The effect of oral treatment with natural or recombinant human interferon alpha (HIA) on inflammatory airway disease in young standardbreds was assessed in a double-blind, randomized clinical trial. A total of 34 horses with nasal discharge, excess mucus in the trachea, and a persistent cough of at least 2 weeks’ duration that interfered with training completed the trial. Horses were rested for 1 week and received oral treatment with either a saline placebo, recombinant human interferon alpha (rHIA; 90 U/horse/day), or natural human interferon alpha (nHIA: 50 U/horse/day) for 5 days. There was a significant decline in nasal discharge and...

13297. Characteristics of the bovine claw associated with the presence of vertical fissures (sandcracks) - Clark, Chris R.; Petrie, Lyall; Waldner, Cheryl; Wendell, Autumn
Vertical fissures (sandcracks) affect approximately 20% of adult beef cattle in western Canada. The risk factors associated with the formation of these lesions are not well understood. This paper describes a case-control study that identifies the role of increased claw size (claw volume >390 cm3, odds ratio 7.8) in the formation of the lesion. No connection was found between vertical fissures and horn hydration status. However, horn hydration was found to vary significantly between samples collected in the summer and winter, the latter samples having significantly reduced moisture content. The importance of these findings and the implications for the prevention...

13298. Heat stroke in a Great Pyrenees dog - Bosak, Jackie K.
A 2-year-old, male Great Pyrenees presented with a history and clinical signs suggesting heat exhaustion. Treatment with intravenous fluids, antibiotics, and surface cooling was unsuccessful, and euthanasia was elected. Histological evaluation of the dog’s tissues revealed lesions consistent with severe hyperthermia and shock.

13299. Fatal Trichuris spp. infection in a Holstein heifer persistently infected with bovine viral diarrhea virus - Wideman, Greg N.
Whipworms (Trichuris spp.) were identified in the colon of a recently purchased, 10-month-old dairy heifer that died suddenly. A skin test was positive for bovine viral diarrhea virus (BVDV). Signs of BVDV occurred in other heifers in the group, but fecal flotations were negative for whipworm eggs.

13300. Challenging diagnosis — Icterus associated with a single perforating duodenal ulcer after long-term nonsteroidal antiinflammatory drug administration in a dog - Duerr, Felix M.; Carr, Anthony P.; Bebchuk, Trevor N.; Pople, Neil C.
A dog developed icterus, vomiting, and anorexia 2 wk after orthopedic surgery and treatment with meloxicam for approximately 1 y. Exploratory laparotomy revealed a single perforated duodenal ulcer. The most likely cause of the hyperbilirubinemia was intrahepatic cholestasis resulting from peritonitis associated with the perforation.


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