Evaluation of urea dilution as a technique for estimating body composition of beef steers in vivo: validation of published equations and comparison with chemical composition     

D C Rule  R N Arnold  E J Hentges  D C Beitz 《Journal of animal science》1986,63(6):1935-1948

Urea dilution equations for prediction of empty body water in live cattle, developed by three separate groups of investigators, were evaluated by comparing empty body water calculated by these equations with that measured chemically in 6-, 12- and 18-mo-old crossbred beef steers (n = 10, 9 and 9, respectively). Of four equations for prediction of percent empty body water, one derived from mixed-breeds of steers overestimated empty body water in the 6-mo-old steers by 7.59% (P less than .05). For the 12- and 18-mo-old steers, calculated and measured percent empty body water did not differ (P greater than .05). Of seven equations for calculation of empty body water volume, two derived from Angus steers with an without live weight in the equation, and one derived from a combination of Angus and mixed-breeds of steers overestimated empty body water (P less than .05) in the 6-mo-old steers. No differences (P greater than .05) between calculated and measured empty body water volume were observed for either the 12- or 18-mo-old steers. When calculated empty body water values were regressed against that measured directly, all regression slopes were not different from 1 (P greater than .05). Intercepts from regressions involving percent empty body water (four equations) were not different from 0. Three of the seven equations for calculation of empty body water volume, one derived from bulls and the others from Angus steers had intercept estimates not different (P greater than .05) from 0. Validity required that these regressions have slopes not different from 1 and intercepts not different from 0. Empty body water calculated from equations that combined live weight and urea space were more highly correlated with directly measured empty body water than that calculated from equations derived only from urea space. Urea space correlations with body composition of our steers also were improved when live weight was included with urea space in multiple regression models. Results of this study suggest that before using any prediction equation for calculating body composition of cattle in vivo, equations should be tested with a sub-sample of cattle from the population for which its use is intended.  相似文献   

Chronic Idiopathic Neutropenia in a Cat     

Cheryl L. Swenson DVM    Gary J. Kociba DVM  Pierre Arnold DVM 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1988,2(2):100-102

Persistent neutropenia (0-0.6 X 10(9) neutrophils/l) was documented during a 10-month period in a 4-year-old spayed female domestic shorthair cat that was presented for anorexia and depression. Salient abnormalities detected on physical examination were fever (40.3 degrees C), dehydration, and gingivitis. The cat was neutropenic (0.5 X 10(9) neutrophils/l) and enzyme-linked immunosorbent assay (ELISA) test for feline leukemia virus was negative. A bone marrow aspirate showed decreased numbers of mature granulocytic cells. In vitro bone marrow cultures for colony-forming units-granulocyte/macrophage (CFU-GM) were performed comparing bone marrow from the patient with that of a normal cat. The patient had fewer CFU-GM than the control. The number of CFU-GM increased when bone marrow mononuclear cells were cultured in the presence of 10(-5) and 10(-6) mol/l of hydrocortisone, but the cat did not respond to oral prednisolone therapy. The pathogenesis of the neutropenia in this cat remains obscure, but resembles the chronic idiopathic neutropenia syndrome of man.  相似文献   

Animal model for genetic evaluation of multibreed data.     

J W Arnold  J K Bertrand  L L Benyshek 《Journal of animal science》1992,70(11):3322-3332

Extension of beef cattle genetic evaluation procedures to multibreed data sets is proposed as a way to allow inclusion of crossbred animals into current analyses and to provide comparisons between purebred animals of different breeds. Previous papers dealing with multibreed BLUP have proposed sire or sire-maternal grandsire models. Because current models used in the beef industry are predominantly of the reduced animal model form, models were developed for animal model and reduced animal model mixed-model evaluations that would account for fixed and random additive genetic effects, along with fixed and random nonadditive genetic effects for populations with heterogeneous means and variances.  相似文献   

Parasitological and immunological progress control during and after chemotherapy of canine leishmaniasis]     

P Deplazes  P Arnold  J Skaggs  M Gessler 《Schweizer Archiv für Tierheilkunde》1992,134(2):85-93

Promastigote Leishmania-organisms were diagnostically cultivated in vitro from popliteal lymph node aspirates obtained from 32 of in total 36 dogs returning from endemic areas. Isoenzyme analysis (glucosephosphate-isomerase (GPI), phosphoglucomutase (PGM) and glutamate-oxaloacetate-transaminase (GOT) resulted in the identification of Leishmania infantum (syn. Leishmania (L.) infantum) for all 18 isolates investigated. Parasites were still able to be cultivated in vitro in 79% of 28 biopsies (from 15 dogs) even following chemotherapy by Glucantime, independent of the time of sampling and the course of disease after treatment. Dogs with a progressive form of disease (despite chemotherapy) showed only a minor or no reduction (between 0 and 4.8%) of the relative antibody concentration (determined by ELISA), whereas regressive forms of disease (without recurrences observed in the period of 10 to 37 months after therapy) demonstrated a marked reduction of the relative antibody concentration (between 6.7 and 16.2%) within the first 5 to 8 months; thereafter the decrease diminished and changed to a persistent low relative antibody concentration.  相似文献   

Studies on Neurotropic Distemper in Foxes: IV. Inclusion Bodies in Neurotropic Distemper     

Arnold H. Kennedy 《Canadian journal of veterinary research》1948,12(8):218

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An Azoturia-like Condition in Mares: Eating Guango (Pithecolobium Saman,Benth) Pods in Jamaica     

G. R. Carter  R. M. Arnold 《Canadian journal of veterinary research》1948,12(9):255-259

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Neurotropic Distemper of Foxes Part II: Paper II The Symptoms observed in Foxes Affected with a Neurotropic Type of Fox Distemper     

Arnold H. Kennedy 《Canadian journal of veterinary research》1948,12(6):168

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Viral testing of 18 consecutive cases of equine serum hepatitis: A prospective study (2014‐2018)     

Joy E. Tomlinson  Amit Kapoor  Arvind Kumar  Bud C. Tennant  Melissa A. Laverack  Laurie Beard  Katie Delph  Elizabeth Davis  Harold Schott II  Kara Lascola  Todd C. Holbrook  Philip Johnson  Sandra D. Taylor  Erica McKenzie  Jessica Carter‐Arnold  Emilie Setlakwe  Lisa Fultz  Jeff Brakenhoff  Rebecca Ruby  Sheetal Trivedi  Gerlinde R. Van de Walle  Randall W. Renshaw  Edward J. Dubovi  Thomas J. Divers 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(1):251-257

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Effect of Ozone Treatment on Cultures of Nannochloropsis oculata, Isochrysis galbana, and Chaetoceros gracilis     

Nasir  Kuresity  D. Allen  Davis C. R. Arnold 《Journal of the World Aquaculture Society》1999,30(4):473-480

This research evaluated ozone treatment of three unicellular algal species commonly used in the culture of marine larvae. Isochrvsis galbana and Nannochloropsis oculata were found to be resistant to total residual oxidants (TRO); whereas, Chaetoceros gracilis was relatively sensitive to TRO. Isochrvsis galbana remained in log-phase growth after treatment with 0.05 mg/L to 0.50 mg/L TRO, and N. oculata exhibited strong growth after being exposed to TRO levels up to 0.67 mg/L. Only TRO levels of 0.92 mg/L and 0.90 tng/L reduced cell counts of N. oculata and I. galbana , respectively. Furthermore, algal cultures having higher concentrations at the time of ozone treatment may respond more favorably to the treatment. Initially, C. gracilis was reduced in cell count at TRO levels above 0.06 mg/L, but log-phase growth was resumed 2 d after exposure to TRO levels as high as 0.31 mg/L. It is concluded that I. galbana and N. oculata can be successfully treated with ozone in the mass production stages without hampering the timely production of concentrated cultures. Although C. gracilis was found to be relatively sensitive, ozone treatment of starter cultures can be performed routinely with this species. We have demonstrated that ozone treatment of algal cultures is a feasible technique, but studies need to be conducted on ozone treatment of other species of unicellular algae and on ozone treatment of varying concentrations of algae in order to enhance the applications of this technique. Also, in order to determine the extent of disinfection of algal cultures, bacterial and viral composition of the cultures should be evaluated in future studies.  相似文献   

Zustand und zielvorstellungen für die Erhaltung der Wacholderheiden auf der Schwäbischen Alb     

W. Arnold  B. Bösch  H. Schmid 《European Journal of Forest Research》1982,101(1):311-346

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