The fecal bacterial microbiota of healthy and sick newborn foals     

Diego E. Gomez  David Wong  Jennifer MacNicol  Katarzyna Dembek 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(1):315-322

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Soil compaction effects on water status of ponderosa pine assessed through 13C/12C composition     

Gomez GA  Singer MJ  Powers RF  Horwath WR 《Tree physiology》2002,22(7):459-467

Soil compaction is a side effect of forest reestablishment practices resulting from use of heavy equipment and site preparation. Soil compaction often alters soil properties resulting in changes in plant-available water. The use of pressure chamber methods to assess plant water stress has two drawbacks: (1) the measurements are not integrative; and (2) the method is difficult to apply extensively to establish seasonal soil water status. We evaluated leaf carbon isotopic composition (delta13C) as a means of assessing effects of soil compaction on water status and growth of young ponderosa pine (Pinus ponderosa var. ponderosa Dougl. ex Laws) stands across a range of soil textures. Leaf delta13C in cellulose and whole foliar tissue were highly correlated. Leaf delta13C in both whole tissue and cellulose (holocellulose) was up to 1.0 per thousand lower in trees growing in non-compacted (NC) loam or clay soils than in compacted (SC) loam or clay soils. Soil compaction had the opposite effect on leaf delta13C in trees growing on sandy loam soil, indicating that compaction increased water availability in this soil type. Tree growth response to compaction also varied with soil texture, with no effect, a negative effect and a positive effect as a result of compaction of loam, clay and sandy loam soils, respectively. There was a significant correlation between 13C signature and tree growth along the range of soil textures. Leaf delta13C trends were correlated with midday stem water potentials. We conclude that leaf delta13C can be used to measure retrospective water status and to assess the impact of site preparation on tree growth. The advantage of the leaf delta13C approach is that it provides an integrative assessment of past water status in different aged leaves.  相似文献   

A lineage of myeloid cells independent of Myb and hematopoietic stem cells   总被引：1，自引：0，他引：1  

Schulz C  Gomez Perdiguero E  Chorro L  Szabo-Rogers H  Cagnard N  Kierdorf K  Prinz M  Wu B  Jacobsen SE  Pollard JW  Frampton J  Liu KJ  Geissmann F 《Science (New York, N.Y.)》2012,336(6077):86-90

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Analgesic and motor-blocking action of epidurally administered levobupivacaine or bupivacaine in the conscious dog     

Ignacio A Gomez de Segura DMV  DrMedVet  Diplomate ECVAA    Antonella Menafro DMV    Paloma García-Fernández DMV  DrMedVet    Silvia Murillo DMV  & Elba M Parodi† MD 《Veterinary anaesthesia and analgesia》2009,36(5):485-494

Objective  To compare the analgesic and motor-blocking effects of epidurally administered levobupivacaine and bupivacaine in the conscious dog.
Study design  Prospective, randomized, cross-over study.
Animals  Six adult female Beagle dogs.
Methods  Each animal received three doses of levobupivacaine or bupivacaine (0.5, 1.0 and 1.5 mg kg⁻¹; concentrations 0.25%, 0.50%, and 0.75%, respectively) in a total volume of 0.2 mL kg⁻¹ by means of a chronically implanted epidural catheter. Onset, duration (through pinch response in the sacral, lumbar and toe areas) and degree of analgesia and motor-blocking status was determined with a scoring system and at regular intervals over 8.5 hours before (baseline) and after drug administration.
Results  Epidurally administered levobupivacaine and bupivacaine had a similar dose-dependent analgesic action with no significant differences in onset (range: 5–8 minutes), duration (bupivacaine: 42 ± 28, 135 ± 68 and 265 ± 68 minutes, and levobupivacaine: 28 ± 33, 79 ± 55 and 292 ± 133 minutes; 0.25%, 0.50%, and 0.75%, respectively) or maximum degree of analgesia. However, levobupivacaine tended to produce a shorter duration of motor block than bupivacaine and the difference in the motor to nociceptive blockade times was significant at the highest dose.
Conclusion  Epidural levobupivacaine produced an analgesic action similar to that of bupivacaine.
Clinical relevance  Epidural levobupivacaine is suitable for clinical use in dogs, mostly at the highest dose if a high degree of analgesia is required.  相似文献   

Effects of food deprivation and particle size of ground wheat on digestibility of food components in broilers fed on a pelleted diet     

Péron A  Bastianelli D  Oury FX  Gomez J  Carré B 《British poultry science》2005,46(2):223-230

The first aim of the experiment was to study the effect of wheat (Triticum aestivum) particle size on the digestibility of starch in a pelleted diet given to broilers. The second aim was to study the consequences of food deprivation before the excreta collection period (from 21 to 24 d). Wheat from a strong hardness cultivar was incorporated at 546.1 g/kg in diets. The other main ingredients were soybean meal (353.5 g/kg) and rapeseed oil (55.0 g/kg). Diets were given as pellets. The experimental design was a 2 x 2 factorial design testing two particle sizes of wheat flour and two procedures of a balance experiment (with or without food deprivation). Birds given diet C (wheat coarse grinding before pelleting) had significantly greater gizzard weight than birds fed on diet F (wheat fine grinding before pelleting). Starch digestibility value was significantly increased when birds were fed on diet F. This effect was halved by food deprivation. No significant effect of grain particle size was observed for protein and lipid digestibility values. However, food deprivation decreased apparent protein digestibility, with an effect which was more pronounced for fine than for coarse grinding. AMEN of the diet was significantly improved by fine grinding of wheat and decreased by food deprivation. However, no significant differences in growth performance were induced by differences in wheat grinding. No significant effect of grinding was observed on the water excretion:feed intake ratio. No significant difference was observed for vent score between treatments. There was over-excretion of starch in the first hours of refeeding following food deprivation.  相似文献   

Outcome and complications associated with treatment of pemphigus foliaceus in dogs: 43 cases (1994-2000)     

Gomez SM  Morris DO  Rosenbaum MR  Goldschmidt MH 《Journal of the American Veterinary Medical Association》2004,224(8):1312-1316

OBJECTIVE: To identify factors affecting prognosis, outcome, and complications associated with pemphigus foliaceus in dogs. DESIGN: Retrospective study. ANIMALS: 43 dogs with pemphigus foliaceus. PROCEDURE: Medical records were reviewed for signalment, age at diagnosis, duration to diagnosis, body area affected, initial immunosuppressive regimens and concurrent use of antimicrobials and sucralfate or histamine receptor 2 blocking agent, adverse effects of treatment, duration of treatment, number of visits for follow-up care, cause of death, and credentials of the veterinarians responsible for continued care. RESULTS: The case fatality rate was 60.5%. Factors significantly correlated with survival time included concurrent use of antimicrobials during initiation of immunosuppressive treatment and a lower number of adverse effects to treatment. Treatment times lasting more than 10 months from diagnosis correlated significantly with survival. CONCLUSIONS AND CLINICAL RELEVANCE: Treatment with or prophylactic use of antimicrobials may be warranted during initial immunosuppressive treatment. The inverse correlation between survival time and number of adverse treatment effects was not unexpected because it was reflective of the owners' decision to euthanatize their dogs and of corticosteroid-related secondary diseases. Survival beyond the tenth month of treatment predicted long-term survival, which suggests that dogs require careful management during the early months of treatment.  相似文献   

Cyanobacterium Cylindro-spermopsis raciborskii as a probable cause of death in cattle in northern Queensland     

AD THOMAS  ML SAKER  JH NORTON  RD OLSEN 《Australian veterinary journal》1998,76(9):592-594

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Efficacy of phosphomycin in the control of Escherichia coli infection of broiler chickens     

A. Fernandez  C. Lara  R. Puyuelo  J. Gomez  J.J. Ramos  A. Loste  M.C. Marca  M.T. Verde 《Research in veterinary science》1998,65(3):201

Seventy-five 25-day-old broilers were divided into three groups: group I unmedicated and challenged with E coli 078:K80; group F infected and treated with 150 ppm of phosphomycin in their drinking water, and group C acted as a control. Their weights, feed intake, clinical signs, macroscopic lesions, E coli reisolation, and serum biochemistry were compared. Group F showed fewer symptoms and gross lesions than those from group I while the average daily gain, bodyweight, and feed intake were similar to the control group. E coli was reisolated in 32 per cent of the livers and spleens from group I, compared with 4 per cent of liver and 8 per cent of spleens from group F. There was an increase in the levels of total protein and globulins in group I but not in group F. These results provide evidence of the therapeutic efficacy of phosphomycin in the control of an experimental E coli infection in broiler chickens.  相似文献   

Trilostane therapy for hyperadrenocorticism in three dogs with adrenocortical metastasis     

Benchekroun G  de Fornel-Thibaud P  Lafarge S  Gomez E  Begon D  Delisle F  Moraillon R  Héripret D  Maurey C  Rosenberg D 《The Veterinary record》2008,163(6):190-192

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Procedure for Obtaining Stable Protein Extracts of Cereal Flour and Whole Meal for Size‐Exclusion HPLC Analysis     

O. R. Larroque  M. C. Gianibelli  M. Gomez Sanchez  F. MacRitchie 《Cereal Chemistry》2000,77(4):448-450

Experiments were conducted to determine the extent of instability of size‐exclusion HPLC extracts prepared from flour, semolina, or whole meal. Procedures to obtain stable extracts were investigated. Whole meal extracts of durum wheat and triticale were the most unstable samples, whereas bread wheat showed smaller changes. Samples prepared from crushed maturing grains, especially during early stages, were greatly influenced by the instability process. By using protease inhibitors, evidence was obtained that endogenous proteases were the source of the instability. Reproducible peak 1 (polymeric protein) results were obtained for a period of at least 72 hr after extract preparation if protein extracts were heated for 2 min at 80°C in a water bath immediately after filtration into the sample vials and before SE‐HPLC analysis. This treatment is a viable solution to avoid sample instability in whole meal and developing grain extracts, particularly when large sample sets are prepared for automatic injection into the HPLC.  相似文献