Brachycephalic airway syndrome.     

J C Hendricks 《Veterinary Clinics of North America: Small Animal Practice》1992,22(5):1145-1153

The range of clinical syndromes and the pathophysiology of respiratory disorders in brachycephalic animals are presented. The problem of deciding which patients require surgical management is reviewed in the light of recent studies and the author's clinical experience. Newer information from related disorders in humans suggests that serious problems can be subclinical and difficult to diagnose. The index of suspicion and guidelines for providing surgical relief to veterinary patients may need to undergo revision.  相似文献   

Frequency of superantigen-producing Staphylococcus intermedius isolates from canine pyoderma and proliferation-inducing potential of superantigens in dogs     

Hendricks A  Schuberth HJ  Schueler K  Lloyd DH 《Research in veterinary science》2002,73(3):273-277

This preliminary study investigated the potential role of staphylococcal superantigens in the pathogenesis of canine pyoderma. The staphylococcal enterotoxins A (SEA), SEB, SEC and SED, and the toxic shock syndrome toxin-1 (TSST-1) were assayed in isolates from skins of dogs with pyoderma. Culture supernatants from 25 of 96 isolates were positive for multiple superantigens, with SEA and SEC being the most frequently detected. In in vitro stimulation of canine peripheral blood mononuclear cells and quantitative flow cytometry revealed that low concentrations of SEA and SEB were potent stimulators of blastogenesis of T cells.  相似文献   

Investigators relate experience with bovine somatotropin     

B F Jenny  M Moore  D F Hendricks  M Hopkins  P Reid 《Journal of the American Veterinary Medical Association》1990,196(10):1562-1563

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QUANTIFICATION OF CEREBRAL VENTRICULAR VOLUME IN ENGLISH BULLDOGS     

Charles H.  Vite  DVM  Erik K.  Insko  PhD  MD  Helena M.  Schotland  MD  Karen  Panckeri  BA  Joan C.  Hendricks  PhD  VMD 《Veterinary radiology & ultrasound》1997,38(6):437-443

Quantitative measurement of cerebral ventricle volume of eight English bulldogs was performed using magnetic resonance (MR) imaging. The mean ventricular volume was 14.8 ml. with a range of 8.6 m1.-38.1 ml. The mean ventricular volume of two beagles was 2.2 ml with a range of 0.7 m1.3.7 ml. The percent of intracranial volume occupied by ventricle was found to be significantly larger in bulldogs (14.0%; S.D. = 7.9%) than in beagles (Range = 1.048%). The relationship between the percent of intracranial volume occupied by ventricle and measurements of body weight, age, sex, and various measures of skull anatomy of the bulldog was also determined. The relationship between ventricular volume and neurologic dysfunction was examined. There was a possible trend between high percent of intracranial volume occupied by ventricle and low body weight. This study will serve as a pilot study for examining the relationship between ventricular volume and neurologic disease in bulldogs.  相似文献   

Deformational mass transport and invasive processes in soil evolution     

Brimhall GH  Chadwick OA  Lewis CJ  Compston W  Williams IS  Danti KJ  Dietrich WE  Power ME  Hendricks D  Bratt J 《Science (New York, N.Y.)》1992,255(5045):695-702

Soils are differentiated vertically by coupled chemical, mechanical, and biological transport processes. Soil properties vary with depth, depending on the subsurface stresses, the extent of mixing, and the balance between mass removal in solution or suspension and mass accumulation near the surface. Channels left by decayed roots and burrowing animals allow organic and inorganic detritus and precipitates to move through the soil from above. Accumulation occurs at depths where small pores restrict further passage. Consecutive phases of translocation and root growth stir the soil; these processes constitute an invasive dilatational process that leads to positive cumulative strains. In contrast, below the depth of root penetration and mass additions, mineral dissolution by descending organic acids leads to internal collapse under overburden load. This softened and condensed precursor horizon is transformed into soil by biological activity, which stirs and expands the evolving residuum by invasion by roots and macropore networks that allows mixing of materials from above.  相似文献   

A POSSIBLE PHYSIOLOGICAL INTERPRETATION OF THE LAW OF THE DIMINISHING INCREMENT     

Hendricks WA  Jull MA  Titus HW 《Science (New York, N.Y.)》1931,73(1894):427-429

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Adsorption of bacteria on soils: Experiments,thermodynamic rationale,and application     

David W. Hendricks  Frederick J. Post  Deorao R. Khairnar 《Water, air, and soil pollution》1979,12(2):219-232

A model for the adsorption of bacteria to soil particles is described using the physical-chemical Langmuir isotherm and the van't Hoff equation. An example of the use of the model for assessing bacterial movement through soil is provided.Staphylococcus aureus was the sorbate with sorbents of activated charcoal, kaolinite clay, Mendon silt loam, and silica sand. Competitive agents sodium lauryl sulfate, sodium chloride, and peptone were also studied. Peptone was the most successful competitor with the bacteria for sites on the sorbent.  相似文献   

Idiopathic hemorrhagic pericardial effusion with organized thrombi in a dog     

E de Madron  C Prymak  J Hendricks 《Journal of the American Veterinary Medical Association》1987,191(3):324-326

A dog was examined because of cardiac tamponade secondary to pericardial effusion. Masses adjacent to the right atrial and ventricular walls were revealed by echocardiography. Pericardectomy and biopsies of the masses established the diagnosis of idiopathic hemorrhagic pericardial effusion with organized thrombi. The dog was healthy 3 months after surgery. These organized thrombi mimicked cardiac neoplasia echocardiographically, and such a possibility should be included in the list of differential diagnoses of cardiac masses.  相似文献   

Response of dogs to corticotropin measured by 17-hydroxycorticosteroid excretion     

R B Wilson  L J Kleine  T J Clarke  E C Hendricks  M S Grossman 《American journal of veterinary research》1967,28(123):313-322

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Visceral leishmaniasis in the German shepherd dog. II. Pathology   总被引：2，自引：0，他引：2  

C M Keenan  L D Hendricks  L Lightner  A J Johnson 《Veterinary pathology》1984,21(1):80-86

Three German shepherd dogs were inoculated with Leishmania chagasi and three with Leishmania donovani and the infection was followed for 82 days. All infected dogs developed splenomegaly and lymphadenomegaly. In lymph nodes there was a reduction in lymphocyte population in paracortical areas, extensive proliferation of macrophages in paracortical areas and medullary cords, follicular hyperplasia, and increased numbers of plasma cells. The spleen had decreased numbers of lymphocytes in periarteriolar lymphoid sheaths, proliferation of macrophages in these regions, follicular hyperplasia, and enlargement of the red pulp with clusters of macrophages and plasma cells. The morphology of the tonsil was similar to the lymph nodes. Clusters of macrophages, often containing Leishmania spp, were present in liver, bone marrow, lung, and the intestines. The morphologic changes in lymph nodes and spleen were suggestive of a suppressed cell-mediated immunity and an active humoral immunity. The German shepherd dog may be a useful laboratory model for the study of immunopathologic changes in visceral leishmaniasis.  相似文献