Recursos de colección

PubMed Central (PMC3 - NLM DTD) (2,987,483 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 14,191

  1. The effect of gastrointestinal parasitism on blood copper and hemoglobin levels in sheep

    Adogwa, A.; Mutani, A.; Ramnanan, A.; Ezeokoli, C.
    Endoparasitism is a problem in Trinidad, as it is in most tropical countries. Parasite infection has been suspected to contribute to the pathogenesis of swayback disease (which is also prevalent in Trinidad), but the mode of action has not been clearly defined, although it has been suggested that parasites interfere with the absorption of copper from the gastrointestinal tract. The objectives of the study were to assess the effect of endoparasitism on blood copper levels and hemoglobin (Hb) concentration in sheep in Trinidad. Copper was administered intramuscularly to parasite infected and noninfected animals. The results showed that parasitism has a...

  2. Efficacy of vaccination against Fusobacterium necrophorum infection for control of liver abscesses and footrot in feedlot cattle in western Canada

    Checkley, Sylvia L.; Janzen, Eugene D.; Campbell, John R.; McKinnon, John J.
    A randomized and blinded field trial was carried out to evaluate the efficacy of a Fusobacterium necrophorum bacterin for control of liver abscesses and footrot under commercial feedlot conditions in western Canada. Half of the vaccinated and half of the unvaccinated control animals had ad libitum access to a forage-based (ALF) growing diet. The other half of each group was limit-fed a grain-based (LFG) growing diet. The overall prevalence of A and A+ liver abscesses in this trial was 16.7%. A strong association was found between diet group and presence of A or A+ liver abscessation at slaughter. Diet group...

  3. Pemphigus erythematosus in a chow chow

    Gonsalves-Hubers, Taesha
    A 3.5-year-old, spayed female, chow chow presented with a pruritic, ulcerative, butterfly lesion on the nasal planum, typical of the pemphigus complex. Pemphigus erythematosus was diagnosed by histopathologic examination. Treatment consisted of enrofloxacin and immunosuppressive therapy with prednisone and azathioprine. Within 5 wk of treatment, the lesions had resolved almost completely.

  4. Treatment of an ocular squamous cell carcinoma in a stallion with atrial fibrillation

    Scheck, Jaryn L.
    A stallion was presented for surgical treatment of limbal squamous cell carcinoma. Excision with a conjunctival pedicle flap was done to prevent ocular invasion and preserve vision. A complication was the diagnosis of atrial fibrillation, which was not converted to sinus rhythm due to the potential complication of treatment with quinidine sulfate.

  5. Specificity dependence between serological tests for diagnosing bovine brucellosis in Brucella-free farms showing false positive serological reactions due to Yersinia enterocolitica O:9

    Mainar-Jaime, Raúl C.; Muñoz, Pilar M.; de Miguel, María J.; Grilló, María J.; Marín, Clara M.; Moriyón, Ignacio; Blasco, José M.
    When brucellosis false positive serological reactions happen in cattle, the serial use of pairs of specificity-correlated serological tests (rose bengal, complement fixation, competitive ELISA) results in specificities lower than expected. In this situation, highly specific tests, such as the indirect ELISA used alone, may be more adequate than serial testing.

  6. Monensin toxicosis in a dairy herd

    Gonzalez, Marta; Barkema, Herman W.; Keefe, Gregory P.
    An acute onset of illness was reported in a lactating dairy herd in Canada in which monensin had been incorporated in error in its ration at almost 10 times the prescribed level. All of the lactating cows became lethargic, were inappetant, developed diarrhea, and had decreased milk production from 28 kg/cow/day, the day before exposure, to 23 kg/cow/day, 3 d later. Within 9 d, all animals recovered from the incident and milk production returned to previous levels.

  7. Stall dimensions and the prevalence of lameness, injury, and cleanliness on 317 tie-stall dairy farms in Ontario

    Zurbrigg, Kathy; Kelton, David; Anderson, Neil; Millman, Suzanne
    The study objectives were to provide a province-wide description of stall dimensions and the aspects of cattle welfare linked to stall design in the tie-stall industry. Data on stall design; stall dimensions; and the prevalence of lameness, injury, and hind limb and udder cleanliness in lactating dairy cattle were collected from a sample of 317 tie-stall farms across Ontario. The majority of the study farms (90%) had stalls with dimensions (length, width, tie-chain length, and tie rail height) that were less than the current recommendations. This may explain, in part, the prevalence of lameness measured as the prevalence of back...

  8. Feline immunodeficiency virus testing in stray, feral, and client-owned cats of Ottawa

    Little, Susan E.
    Feline immunodeficiency virus (FIV) seroprevalence is evaluated in 3 groups of cats. Seventy-four unowned urban strays were tested, as well as 20 cats from a small feral cat colony, and 152 client-owned cats. Of the 246 cats tested, 161 (65%) were male and 85 (35%) were female. Seroprevalence for FIV was 23% in the urban strays, 5% in the feral cat colony, and 5.9% in the client-owned cats. Ten cats (4%) were also positive for Feline leukemia virus (FeLV) antigen, including 2 cats coinfected with FeLV and FIV. Seroprevalence for FIV in cats from Ottawa is similar to that found...

  9. Histopathologic lesions of diabetes mellitus in a domestic ferret

    Benoit-Biancamano, Marie-Odile; Morin, Michel; Langlois, Isabelle
    A 2-year-old ferret was referred with a diagnosis of diabetes mellitus. The animal died despite insulin therapy and was submitted for necropsy. Light microscopic examination revealed a mild hepatic lipidosis and pancreatic lesions consisting of a diffuse vacuolation of the Langerhans’ islet cells with a periodic acid-Schiff positive material compatible with glycogen.

  10. Sporadic juvenile thymic lymphoma in a 6-month-old Holstein heifer

    Nasir, Karen S.
    A 6-month-old Holstein heifer was presented for recurrent bloat and a firm, primarily left-sided mass in the caudoventral cervical region. Surgical exploration revealed a vascularized, encapsulated mass extending from the submandibular region to the thoracic inlet. Postmortem gross and histopathologic examination and the history enabled a diagnosis of sporadic thymic lymphoma.

  11. Unclassified cardiomyopathy in a geriatric cat

    Wolfson, Rachel
    A 15-year-old, neutered male, domestic shorthair presented with dyspnea. Unclassified cardiomyopathy was diagnosed. Treatment resulted in a profound bradycardia, which was attributed to the administration of a beta-adrenergic blocker. The pathogenesis of unclassified cardiomyopathy is discussed and the side effects of beta-adrenergic blockers and angiotensin converting enzyme inhibitors are reviewed.

  12. Anaplasma phagocytophilum infection (granulocytic anaplasmosis) in a dog from Vancouver Island

    Lester, Sally J.; Breitschwerdt, Edward B.; Collis, Christopher D.; Hegarty, Barbara C.
    A 7-year-old Labrador retriever had nonspecific clinical signs that included lethargy, malaise, and difficult ambulation. The dog was native to Vancouver Island, British Columbia, and had never left this area. Morulae were identified in polymorphonuclear cells. Serologic studies and polymerase chain reaction (PCR) testing confirmed canine anaplasmosis caused by Anaplasma phagocytophilum. The dog recovered after treatment with tetracycline.

  13. Determination of the effect of single abomasal or jejunal inoculation of Clostridium perfringens Type A in dairy cows

    Ewoldt, Jennifer M.; Anderson, David E.
    A randomized study was conducted to determine if inoculation of the abomasum or jejunum with Clostridium perfringens Type A would induce jejunal hemorrhage syndrome in healthy cows. Twelve adult nonlactating dairy cows were inoculated with 10 mL of pure culture broth of C. perfringens type A (beta2 toxin positive) into the abomasum (n = 6) or jejunum (n = 6). On day 6, the cows were euthanized and samples for culture were taken from the abomasum, jejunum, and feces. No cows developed clinical signs of jejunal hemorrhage syndrome during the course of the study. Five of 6 abomasal samples and...

  14. The role of extruded disk material in thoracolumbar intervertebral disk disease: A retrospective study in 40 dogs

    Besalti, Omer; Ozak, Ahmet; Pekcan, Zeynep; Tong, Sait; Eminaga, Salih; Tacal, Tugra
    The objective of the study was to determine the effect of the dispersed or nondispersed form of the extruded disk material (EDM) on the neurological status and surgical outcomes in Hansen thoracolumbar intervertebral disk disease Type I (IVDD-I). Medical records of 40 dogs with IVDD-I were reviewed, including neurologic status on admission, findings on magnetic resonance imaging (MRI), intraoperative findings, and surgical outcomes. In MRI evaluations, EDM was on the right in 16, on the left in 18, and centrally in 6 cases; in all cases, findings were confirmed by surgery. Extruded disk material was localized and classified as dispersed...

  15. Causes of gastrointestinal colic in horses in western Canada: 604 cases (1992 to 2002)

    Abutarbush, Sameeh M.; Carmalt, James L.; Shoemaker, Ryan W.
    The medical records of equine gastrointestinal colic cases presented to the Western College of Veterinary Medicine between 1992 and 2002 are reviewed. There was no breed predisposition to colic. Geldings were more prone to colic than females and stallions. Overall, the 3 most common causes of colic were large colon impaction (20.8%), large colon displacement (16.5%), and spasmodic colic (11.7%), after excluding the 13% of cases in which the diagnosis was undetermined. Of the medical cases, large colon impaction (38.4%) and spasmodic colic (22.5%) were the most common. Of the surgical cases, large colon displacement (24.5%), large colon torsion (14.3%),...

  16. Grass tetany in a herd of beef cows

    O, Odette
    Five cows in a herd of 15 cattle that had just been turned out onto lush pasture after having over-wintered on poor quality hay died suddenly. Biochemical profiles collected from the cadavers revealed reduced serum levels of magnesium, urea, and beta-hydroxybutycate. Classical grass tetany (hypomagnesemia) was diagnosed on postmortem examination.

  17. The use of rutin in a cat with idiopathic chylothorax

    Kopko, Susan H.
    A 9-year-old, male castrated cat was presented with labored breathing and lethargy of 5 d duration. Idiopathic chylothorax was diagnosed based on clinical signs, thoracic radiographs, and thoracentesis. Partial resolution of the pleural effusion followed treatment with rutin, a benzopyrone extracted from plants. The etiology, diagnosis, and treatment of this disease are discussed.

  18. Escherichia coli O157:H7 vaccine field trial in 9 feedlots in Alberta and Saskatchewan

    Van Donkersgoed, Joyce; Hancock, Dale; Rogan, Dragan; Potter, Andrew A.
    A feedlot trial was conducted to assess the efficacy of an Escherichia coli O157:H7 vaccine in reducing fecal shedding of E. coli O157:H7 in 218 pens of feedlot cattle in 9 feedlots in Alberta and Saskatchewan. Pens of cattle were vaccinated once at arrival processing and again at reimplanting with either the E. coli O157:H7 vaccine or a placebo. The E. coli O157:H7 vaccine included 50 ?g of type III secreted proteins. Fecal samples were collected from 30 fresh manure patties within each feedlot pen at arrival processing, revaccination at reimplanting, and within 2 wk of slaughter.

  19. Retrospective study of owners’ perception on home monitoring of blood glucose in diabetic dogs and cats

    Van de Maele, I.; Rogier, N.; Daminet, S.
    Home monitoring of blood glucose (HMBG) concentrations has been recommended in the monitoring of human diabetics for 3 decades. During the last number of years, it also gained popularity in long-term follow-up of diabetic cats and dogs. The aim of this retrospective study was to evaluate the practical feasibility of and identify the major problems encountered with HMBG in diabetic pets. A standard questionnaire was filled in by owners of 9 diabetic pets monitored with HMBG. The need for more than 1 puncture to obtain a blood drop, the creation of a sufficient blood drop, the need for assistance in...

  20. Jejunal hemorrhage syndrome in dairy and beef cattle: 11 cases (2001 to 2003)

    Abutarbush, Sameeh M.; Radostits, Otto M.
    The medical records of 11 cattle with jejunal hemorrhage syndrome were reviewed. Female and male, lactating and pregnant, dairy and beef cattle were affected. Decreased feed intake and milk production, reduced amounts of dark feces, and abdominal discomfort were common historical findings. Common clinical findings included depressed demeanor, a “ping” and fluid-splashing sounds over the right abdomen, melena, and distended loops of intestine on rectal palpation. Surgery was done on 7 cases, 10 cases were euthanized, and 1 died. Clostridium perfringens type A was isolated from the intestinal contents from 7 of 7 cases. At necropsy, the characteristic finding was...

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