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Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire

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https://www.readbyqxmd.com/read/28725116/towards-an-improved-estimate-of-antimicrobial-use-in-animals-adjusting-the-population-correction-unit-calculation
#1
Brian R Radke
International comparisons of animal antimicrobial use (AMU) have typically been based on total national estimates of antimicrobials sales standardized by the national animal biomass calculated as the population correction unit (PCU). The objective of this paper was to compare the currently accepted PCU calculation with that of the adjusted population correction unit (APCU), which re-evaluates the standard animal weights used in the calculation and accounts for animal lifespan. The APCU calculation resulted in substantial changes to the 2009 national biomass estimates for cattle, pigs, and poultry in 8 European countries and Canada...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725115/maternal-and-fetal-arterial-blood-gas-data-in-normotensive-singleton-isoflurane-anesthetized-sheep-at-124-126-days-of-gestation
#2
Claire M Loughran, Matthew W Kemp, Gabrielle C Musk
The aim of this case series was to describe the differences between maternal and fetal blood-gas results during anesthesia. Sixteen singleton adult merino ewes weighing 60.1 ± 5.1 kg at 125.7 d (124 to 126 d) gestation were anesthetized. Maternal (radial) and fetal (umbilical) arterial blood gas samples were collected 79 ± 6 min after the start of anesthesia if maternal mean arterial pressure (MAP) was stable and > 65 mmHg. Fetal pH, partial arterial pressure of oxygen (PaO2), glucose, arterial hemoglobin oxygen saturation (SaO2), sodium, and chloride were significantly lower and fetal partial arterial pressure of carbon dioxide (PaCO2), lactate, hematocrit, total hemoglobin, potassium, and calcium were significantly higher than maternal blood-gas values...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725114/evaluation-of-serum-symmetric-dimethylarginine-in-dogs-with-heartworm-infection
#3
Bom-Sul Choi, Hyeongsun Moon, Sang-Il Suh, Changbaig Hyun
This study evaluated the circulating levels of serum symmetric dimethylarginine (SDMA) in 12 dogs with different severities of heartworm disease (HWD) and assessed the biochemical renal markers (blood urea nitrogen, creatinine). Dogs were classified into 2 groups based on the severity of clinical signs. Group A - asymptomatic to mild clinical signs, group B - moderate to severe clinical signs. The serum SDMA levels were higher in dogs in group B. Although the serum SDMA levels in dogs in group A were also higher than those of the control dogs, the difference was not statistically significant...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725113/cystic-duct-pressures-after-ligation-with-a-novel-absorbable-device-in-an-ex-vivo-caprine-cholecystectomy-model
#4
Andrea J Sundholm Tepper, Odd V Höglund, Bonnie G Campbell, Chi-Ya Chen, Boel A Fransson
Laparoscopic cholecystectomy is the standard of care in human medicine for gall bladder disease. Although infrequently reported in veterinary literature, laparoscopic cholecystectomy is an option for uncomplicated gall bladder disease in canine patients. Due to the risk of cystic duct ligature slippage or clip dislodgement, we wanted to explore the use of a LigaTie; a novel absorbable medical device modeled after a cable tie. Our object was to describe the use of the LigaTie in a caprine cadaveric study of cholecystectomies as a model for canine patients and demonstrate the leak pressure of the cystic duct compared with cholecystectomies performed with 2 large endoscopic hemoclips...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725112/evaluation-of-transmission-infrared-spectroscopy-and-digital-and-optical-refractometers-to-identify-low-immunoglobulin-g-concentrations-in-alpaca-serum
#5
Ibrahim Elsohaby, Jennifer J Burns, Christopher B Riley, J Trenton McClure
This study aimed to evaluate the digital Brix and optical serum total protein (STP) refractometers for measuring concentrations of serum immunoglobulin G (IgG) in alpacas and compare them to IgG concentrations measured by the reference method of radial immunodiffusion (RID) assay. The appropriate cutoff point for Brix and STP refractometers and the transmission infrared (TIR) spectroscopy method was determined for low IgG concentrations (< 10 g/L). Serum samples were collected from alpacas (N = 169) and tested by both refractometers...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725111/oxidative-stress-and-food-supplementation-with-antioxidants-in-therapy-dogs
#6
Sara Sechi, Filippo Fiore, Francesca Chiavolelli, Corrado Dimauro, Anna Nudda, Raffaella Cocco
The objective of this study was to evaluate the ability of a long-term antioxidant-supplemented diet to regulate the oxidative stress and general health status of dogs involved in animal-assisted intervention (AAI) programs. Oxidative stress is a consequence of the accumulation of reactive oxygen species (ROS). Exercise-induced oxidative stress can increase muscle fatigue and fiber damage and eventually leads to impairment of the immune system. A randomized, placebo-controlled, crossover clinical evaluation was conducted with 11 healthy therapy dogs: 6 females and 5 males of different breeds and with a mean age of 2...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725110/the-impact-of-carboplatin-and-toceranib-phosphate-on-serum-vascular-endothelial-growth-factor-vegf-and-metalloproteinase-9-mmp-9-levels-and-survival-in-canine-osteosarcoma
#7
Tracy L Gieger, Julie Nettifee-Osborne, Briana Hallman, Chad Johannes, Dawn Clarke, Michael W Nolan, Laurel E Williams
In this pilot study, 10 dogs with osteosarcoma (OSA) were treated with amputation and subsequent carboplatin chemotherapy (300 mg/m(2) IV q3wk × 4 doses) followed by toceranib phosphate (2.75 mg/kg PO q48h starting at day 14 post carboplatin). Monthly clinical monitoring and serum measurements of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-9 (MMP-9) were acquired. No dogs were removed from the study due to toxicity. Levels of VEGF and MMP-9 did not change over time. Seven dogs died related to local recurrence and/or pulmonary or bone metastasis and the remainder died of other causes...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725109/direct-repeat-unit-dru-typing-and-antimicrobial-resistance-of-methicillin-resistant-staphylococcus-pseudintermedius-isolated-from-dogs-in-atlantic-canada
#8
Matthew E Saab, J Scott Weese, J T McClure
There are few reports investigating the characterization of methicillin-resistant Staphylococcus pseudintermedius (MRSP) in dogs in Canada and none from Atlantic Canada. The objectives of this study were to strain type MRSP isolates cultured at a regional diagnostic laboratory using direct repeat unit (dru) typing and to describe their antimicrobial resistance profiles. Ninety-four isolates recovered from dogs between 2010 and 2012 had dru typing, cluster analysis, and antimicrobial susceptibility testing done...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725108/identification-of-the-linear-ligand-epitope-on-classical-swine-fever-virus-that-interacts-with-porcine-kidney-15-cells
#9
Yin Mei, Feng Yue, Hong-Mei Ning, Juan-Juan Zhou, Xuan-Nian Wang
Binding of the viral ligand to a specific receptor is the first step of virus entry into target cells. The envelope proteins E(rns), E1, and E2 of classical swine fever virus (CSFV) are involved in the interaction with host cell receptors to mediate CSFV infection. The aim of this investigation was to identify epitopes that bind to porcine kidney (PK)-15 cells to prevent CSFV infection. Ten peptides representing E(rns), E1, and E2 were synthesized. Immunohistochemical study showed that the SE24 peptide, which is derived from the E2 amino acid sequence, could effectively bind to PK-15 cells...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725107/retrospective-study-of-the-relationship-of-torque-teno-sus-virus-1a-and-torque-teno-sus-virus-1b-with-porcine-circovirus-associated-disease
#10
Alejandro Vargas-Ruiz, Hugo Ramírez-Álvarez, José I Sánchez-Betancourt, Víctor Quintero-Ramírez, Ignacio C Rangel-Rodríguez, Joel A Vázquez-Perez, Lucia A García-Camacho
Genus Iotatorquevirus consists of 2 species, Torque teno sus virus 1a and Torque teno sus virus 1b, which are ubiquitous in swine populations, and are widely reported in association with porcine circovirus associated disease (PCVAD). To evaluate the relationship with PCVAD, 100 formalin-fixed paraffin-embedded tissue samples were used to detect both Iotatorquevirus species by nested PCR and sequencing. Sixty-eight PCVAD cases were selected as well as 32 porcine circovirus type 2 (PCV2) non-affected cases. Overall, 33 of the 100 cases were positive for Torque teno sus virus 1a and 8 of 100 were positive for Torque teno sus virus 1b...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725106/development-of-porcine-circovirus-2-pcv2-open-reading-frame-2-dna-vaccine-with-different-adjuvants-and-comparison-with-commercial-pcv2-subunit-vaccine-in-an-experimental-challenge
#11
Changhoon Park, Jiwoon Jeong, Kyuhyung Choi, Su-Jin Park, Ikjae Kang, Chanhee Chae
The objective of this study was to compare the protection against challenge with porcine circovirus 2 (PCV2) induced by an experimental vaccine based on open reading frame (ORF) 2 of PCV2 DNA plus an adjuvant (aluminum hydroxide, cobalt oxide, or liposome) and a commercial PCV2 subunit vaccine. A total of 35 colostrum-fed, cross-bred, conventional piglets were randomly divided into 7 groups. The commercial vaccine was more efficacious against PCV2 challenge than the 4 experimental vaccines according to immunologic, virologic, and pathological outcomes...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28725105/porcine-reproductive-and-respiratory-syndrome-virus-prrsv-in-pig-meat
#12
Philippe Raymond, Christian Bellehumeur, Malliga Nagarajan, Diane Longtin, Alexandra Ferland, Peter Müller, Rachel Bissonnette, Carole Simard
Porcine reproductive and respiratory syndrome, caused by the porcine reproductive and respiratory syndrome virus (PRRSV), is an economically important disease in the swine industry. Previous studies demonstrated the presence of the virus in pig meat and its transmissibility by oral consumption. This study further analyzed the infectivity of PRRSV in commercial pig meat. Fresh bottom meat pieces (n = 1500) randomly selected over a period of 2 y from a pork ham boning plant located in Quebec, Canada, were tested by reverse transcriptase polymerase chain reaction (RT-PCR)...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408784/prevalence-of-small-ruminant-lentivirus-and-mycobacterium-avium-subsp-paratuberculosis-co-infection-in-ontario-dairy-sheep-and-dairy-goats
#13
Nancy Stonos, Cathy Bauman, Paula Menzies, Sarah K Wootton, Niel A Karrow
Infection with small ruminant lentiviruses (SRLV) causes a variety of chronic inflammatory conditions that limit production. Mycobacterium avium subsp. paratuberculosis (MAP) is also a major production-limiting disease of sheep and goats, which causes severe inflammation of the small intestine. Previous studies have indicated that both SRLV and MAP are widespread in small ruminants in Ontario. This study estimated the prevalence of SRLV and MAP co-infection. Serum samples that were previously tested for MAP infection were re-tested for SRLV...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408783/prokaryotic-expression-of-the-extracellular-domain-of-porcine-programmed-death-1-pd-1-and-its-ligand-pd-l1-and-identification-of-the-binding-with-peripheral-blood-mononuclear-cells-in-vitro
#14
Yan-Ping Zhu, Feng Yue, Yong He, Peng Li, Yuan Yang, Yu-Ting Han, Yan-Fang Zhang, Guo-Peng Sun, Dong-Guang Guo, Mei Yin, Xuan-Nian Wang
Programmed cell death protein 1 (PD-1), a costimulatory molecule of the CD28 family, has 2 ligands, PD-L1 and PD-L2. Our previous studies showed that the expression of PD-1 and PD-L1 is up-regulated during viral infection in pigs. Extensive studies have shown that blockade of the PD-1/PD-L1 pathways by anti-PD-L1 antibody or soluble PD-1 restores exhausted T-cells in humans and mice. In the present study the extracellular domains of PD-1 and PD-L1 were used to evaluate the binding of PD-1 and PD-L1 with peripheral blood mononuclear cells (PBMCs)...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408782/assessment-of-regional-left-ventricular-systolic-function-by-strain-imaging-echocardiography-in-phenotypically-normal-and-abnormal-maine-coon-cats-tested-for-the-a31p-mutation-in-the-mybpc3-gene
#15
Arine Pellegrino, Alexandre G T Daniel, Guilherme G Pereira, Paula H Itikawa, Maria Helena M A Larsson
Myocardial dysfunction occurs in cats with hypertrophic cardiomyopathy (HCM), but little is known about the early stages of the disease. Strain imaging echocardiography is a method that enables the quantitative assessment of myocardial function and deformity, allowing the characterization of systolic dysfunction. The objective of this study was to assess systolic function using strain imaging echocardiography in Maine coon cats genetically tested for the A31P mutation in the MYBPC3 gene, with and without ventricular hypertrophy...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408781/inflammatory-bowel-disease-affects-density-of-nitrergic-nerve-fibers-in-the-mucosal-layer-of-the-canine-gastrointestinal-tract
#16
Andrzej Rychlik, Slawomir Gonkowski, Marcin Nowicki, Jaroslaw Calka
The objective of this study was to determine the effect of inflammatory bowel disease (IBD) on the density of nitrergic nerve fibers in the mucosal layer of different sections of the gastrointestinal tract of dogs. Twenty-eight German shepherd hybrid dogs of both sexes, weighing from 15 to 25 kg and aged 6 to 10 y, were studied. The dogs were divided into 4 groups with 7 animals in each group: healthy animals, as well as dogs suffering from mild, moderate, and severe IBD. Immunoreactivity to neuronal isoform of nitric oxide synthase, which is a marker of nitrergic neurons, in samples of the mucosal layer in the duodenum, jejunum, and descending colon was studied using the single immunofluorescence method and the number of nerve fibers was evaluated in each observation field...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408780/lactobacillus-casei-regulates-differentiation-of-th17-treg-cells-to-reduce-intestinal-inflammation-in-mice
#17
Kai Wang, Hao Dong, Yu Qi, Zhihua Pei, Shushuai Yi, Xiaojie Yang, Yanli Zhao, Fanxing Meng, Shouping Yu, Tiezhong Zhou, Guixue Hu
In order to study the ability of Lactobacillus casei to ameliorate murine enteritis, 18 mice were randomly divided into 3 groups: the enteritis group, intervention group, and control group. The interleukin (IL)-6 and transforming growth factor-β (TGF)-β content in mouse peripheral blood and duodenum was detected using an enzyme-linked immunosorbent assay (ELISA). The number of CD4(+)CD25(+)Foxp3(+) T-regulatory cells (Tregs) and CD4(+)IL-17A(+) Th17 cells in the mesenteric lymph nodes (MLN) and spleen were detected using flow cytometry, and quantitative reverse transcription polymerase chain reaction (PCR) and western blot analysis were used to measure Foxp3 and retinoid-related orphan receptor-γ (RORγt) mRNA and protein expression in the MLN...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408779/effect-of-the-probiotic-lactobacillus-murinus-lbp2-on-clinical-parameters-of-dogs-with-distemper-associated-diarrhea
#18
Luis Delucchi, Martín Fraga, Pablo Zunino
The objective of this study was to assess the effect of the probiotic Lactobacillus murinus native strain (LbP2) on general clinical parameters of dogs with distemper-associated diarrhea. Two groups of dogs over 60 d of age with distemper and diarrhea were used in the study, which was done at the Animal Hospital of the Veterinary Faculty of the University of Uruguay, Montevideo, Uruguay. The dogs were treated orally each day for 5 d with the probiotic or with a placebo (vehicle without bacteria). Clinical parameters were assessed and scored according to a system specially designed for this study...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408778/concurrent-vaccination-of-boars-with-type-1-and-type-2-porcine-reproductive-and-respiratory-syndrome-virus-prrsv-reduces-seminal-shedding-of-type-1-and-type-2-prrsv
#19
Jiwoon Jeong, Changhoon Park, Ikjae Kang, Su-Jin Park, Chanhee Chae
The objective of the present study was to determine the effect of concurrent vaccination of boars with type 1 and type 2 porcine reproductive and respiratory syndrome virus (PRRSV) on seminal shedding of both genotypes. The boars tolerated well concurrent administration of 2 commercial PRRSV vaccines, and no adverse reactions were observed. No interference in the humoral immune response (measured as the level of anti-PRRSV antibodies) or the cell-mediated immune response (measured as the level of PRRSV-specific interferon-γ-secreting cells) was observed after concurrent administration compared with single administration of the same vaccines...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408777/efficacy-of-an-accelerated-hydrogen-peroxide-disinfectant-to-inactivate-porcine-epidemic-diarrhea-virus-in-swine-feces-on-metal-surfaces
#20
Derald J Holtkamp, Jacqueline Myers, Paul R Thomas, Locke A Karriker, Alejandro Ramirez, Jianqiang Zhang, Chong Wang
In May of 2013, porcine epidemic diarrhea virus (PEDV) was detected in swine for the first time in North America. It spread rapidly, in part due to contaminated livestock trailers. The objective of this study was to test the efficacy of an accelerated hydrogen peroxide disinfectant for inactivating PEDV in the presence of feces on metal surfaces, such as those found in livestock trailers. Three-week-old barrows were inoculated intragastrically with 5 mL of PEDV-negative feces for the negative control, 5 mL of untreated PEDV-positive feces for the positive control, and 5 mL or 10 mL of PEDV-positive feces that was subjected to treatment with a 1:16 or 1:32 concentrations of accelerated hydrogen peroxide disinfectant for a contact time of 30 min at 20°C...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
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