Humoral response in neonatal calves following immunization with Escherichia coli (strain J5): the effects of adjuvant, age and colostral passive interference   总被引：1，自引：0，他引：1  

J W Tyler  J S Cullor  M C Thurmond  V L Douglas  J D Dellinger 《Veterinary immunology and immunopathology》1989,23(3-4):333-344

Serologic responses in 61 calves 3 to 34 days of age following immunization with bacterins containing a heat-killed rough mutant, Escherichia coli 0111:B4 (strain J5) were determined by an enzyme-linked immunosorbent assay specific for the IgG isotype. Administration of either heat-killed bacteria or oil-based adjuvants alone failed to enhance serologic recognition of common core antigens when comparing to nonvaccinate controls. Increased titers were uniquely and specifically limited to calves receiving the antigen in an oil emulsion. In a second experiment, age and initial, passively acquired titer recognizing the vaccinal antigen were not found to have any effect on the magnitude of the humoral response of 57 calves following immunization.  相似文献   

A multi-scale analysis of landscape statistics   总被引：23，自引：2，他引：21  

Cain  Douglas H.  Riitters  Kurt  Orvis  Kenneth 《Landscape Ecology》1997,12(4):199-212

It is now feasible to monitor some aspects of landscapeecological condition nationwide using remotely-sensed imagery andindicators of land cover pattern. Previous research showedredundancies among many reported pattern indicators andidentified six unique dimensions of land cover pattern. Thisstudy tested the stability of those dimensions and representativepattern indicators across different types of land cover maps. Themaps were derived from Landsat Thematic Mapper images of theTennessee River and Chesapeake Bay watersheds, and they differedin resolution, number of attributes, and method of delineatinglandscape unit boundaries. A multivariate analysis of patternmetrics was conducted separately for each map, and the resultswere then compared among types of maps. Measures of land coverdiversity, texture, and fractal dimension were more consistentthan measures of average patch shape or compaction among the landcover maps.  相似文献   

Founding Horses          下载免费PDF全文

Douglas Mitchell 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(3):180

  相似文献   

Cytologic and endoscopic findings after intrapulmonary blood inoculation in horses     

Douglas L. Step DVM  Kathy P. Freeman DVM  PhD  Robin D. Gleed BVSc  Richard P. Hackett DVM 《Journal of Equine Veterinary Science》1991,11(6):340-345

The bronchial trees of 8 horses were inoculated with citrated autologous blood, and subsequent observations were compared with those from 3 controls. Free blood was observed at the external nares of six of the eight horses after inoculation. Changes in the appearance of the trachea and changes in the cytologic properties of tracheal wash aspirates, stained using a rapid Papanicolaou method, were followed over time. The cell types found after blood inoculation included free red blood cells, erythrophages, and siderophages. Erythrophages were found only in the few days after inoculation while siderophages persisted until at least 4 weeks. Finely stippled "early" siderophages were distinguished from granular "aged" siderophages. Direct visual assessment ceased to detect blood after 7 days. Ten percent of the tracheal wash samples contained insufficient cells to permit interpretation. In the 4 weeks after blood inoculation, cytologic evaluation was diagnostic of intrapulmonary blood in 20 out of 21 tracheal washes with sufficient cells for evaluation; that is a false negative rate of 1 in 21. Cytologic interpretation gave 1 false positive diagnosis in 20 tracheal washes in the period up to 4 weeks. This protocol could be modified to study the effects of exercise, drug administration or other variables on the clearance of blood from the pulmonary tree. Comparison of such studies with results from horses with exercise-induced pulmonary hemorrhage (EIPH) may improve our understanding, diagnosis, treatment and monitoring of naturally occurring EIPH in horses.  相似文献   

Synovioma in a cat     

J. Douglas Davies  N. R. F. Little 《The Journal of small animal practice》1972,13(3):127-133

A synovial tumour arose from tendon sheath in the right hind paw of an 8-year-old British short-hair tabby cat. Four months after excision the tumour recurred locally but no metastasis was demonstrable at necropsy. Three cases of synovioma in the cat are now on record; they are characterized by a distal site in the limbs, intimate attachment to tendon sheaths, proclivity to local recurrence without metastasis, and prominent tumour giant cells.
Résumé. Une tumeur synoviale s'est formée sur l'enveloppe tendineuse de la patte postérieure droite d'un chat anglais moucheté à poils ras, de 8 ans. Quatre mois après l'excision de la tumeur, on a noté une rechute locale mais pas de métastase à l'autopsie. On connaît trois cas de synoviomes chez le chat, les tumeurs sont caractérisées par leur situation distale sur les membres, leur adhérence intime aux enveloppes du tendon, leur tendance à des rechutes locales sans métastase et la prédominance de cellules géantes dans la tumeur.
Zusammenfassung. Ein Synovialtumor entstand aus der Sehnenscheide in der rechten Hinterpfote einer acht Jahre alten kurzhaarigen britischen Tabby-Katze. Vier Monate nach der Exzision kehrte der Tumor örtlich wieder, aber bei der Autopsie war keine Metastase nachweisbar. Es sind jetzt drei Fälle von Synovialom bei der Katze verzeichnet; sie sind charakterisiert durch distales Auftreten an den Gliedmassen, enge Verbundenheit mit Sehnenscheiden, Neigung zum örtlichen Wiederauftreten ohne Metastase und prominente Tumorriesenzellen.  相似文献   

Transparent emulsions of pyrethroids     

Bernard B. Brown  Joseph B. Jaus  Douglas R. Calsetta 《Pest management science》1977,8(3):274-278

When the absence of organic solvents or halogenated/hydrocarbon propellants are desirable or mandatory in applying pyrethroids for typical institutional or household disinsection, emulsifiable concentrates are available that permit aqueous dilution in all proportions to provide transparent, indefinitely stable compositions suitable for non-pressurised delivery. The system is equally applicable to synergised natural pyrethrins and typical synthetic pyrethroids. The compositions can accommodate additives to provide economic residual action against crawling insects when desirable. Typical products registered in the United States will be discussed as will development activities on the new long residual pyrethroids.  相似文献   

Preferential decay of passively acquired immunoglobulins recognizing shared gram-negative core antigens in neonatal swine     

J W Tyler  J S Cullor  V L Douglas  W L Smith  K M Parker 《American journal of veterinary research》1989,50(4):480-482

Serum immunoglobulins of the IgG isotype recognizing common gram-negative cell core epitopes were serially measured by use of a direct ELISA on blood obtained from 10 neonatal swine. An R-mutant Escherichia coli (strain J5) was used as a plate antigen. Total serum IgG was measured by use of radial immunodiffusion. Half-lives of core antigen-specific IgG (6.81 days) and total serum IgG (14.85 days) were dramatically different (P less than 0.01).  相似文献   

Estimates of Additive Genetic Effects, Maternal Genetic Effects, Individual Heterosis, Maternal Heterosis, and Egg Cytoplasmic Effects for Growth in Tilapia nilotica     

Douglas  Tave  R. Oneal  Smitherman  V. Jayaprakas  Daryl L.  Kuhlers 《Journal of the World Aquaculture Society》1990,21(4):263-270

Lengths and weights of Auburn University-Egypt and Auburn University-Ivory Coast strains of Tilapia nilotica and their F₁ F₂, and backcross hybrids were analyzed by multiple regression to estimate strain additive genetic effects, strain maternal genetic effects, individual heterosis (specific combining ability), maternal heterosis, and strain egg cytoplasmic effects for growth to determine why heterosis of the F₂ and backcross hybrids was greater than that of the F_I hybrids. Individual heterosis and maternal heterosis made the greatest contributions to growth. The F₂ and backcross hybrids were larger than the F₁ hybrids because of maternal heterosis. Regression coefficients were used to predict growth for any possible hybrid combination. Egypt ♀× Ivory Coast ♂ F_I hybrid females backcrossed to Egypt males and Egypt ♀× Ivory Coast ♂ F₂ hybrids were the largest groups evaluated in this study and were also predicted to have faster growth rates than any other possible Egypt-Ivory Coast hybrid.  相似文献   

Infraspinatus contracture associated with suprascapular paralysis in a dog     

Ghery D. Pettit  Douglas H. Slatter 《The Journal of small animal practice》1972,13(12):699-702

The clinical signs, diagnosis and surgical treatment of a case of lameness due to contracture of the infraspinatus muscle in a 5-year-old dog are described. Although the cause of the contracture remains unknown, concurrent atrophy of this muscle and the supraspinatus suggest that trauma to the suprascapular nerve was involved.
Résumé. On décrit les symptômes cliniques, le diagnostic et le traitement chirurgique d'un cas de claudication dû à la contracture du muscle infraspinal chez un chien âgé de cinq ans. Bien que la cause de la contracture reste inconnue, l'atrophie coexistante de ce muscle et celle du muscle susépineux suggèrent l'implication de trauma au nerf susscapulaire.
Zusammenfassung. Die klinischen Symptome, Diagnose und chirurgische Behandlung in einem Fall von Lahmheit, zuzuschreiben der Kontraktur des Musculus infraspinatus in einem fünfjährigen Hund, sind beschrieben. Obwohl die Ursache der Kontraktur unbekannt bleibt, gleichzeitige Abzehrung dieses Muskels und des Musculus supraspinatus, deutet an, dass Trauma des suprascapular Nervs mit einbegriffen war.  相似文献   

Inhibition of elastase by canine serum: demonstration of an acute phase response     

J G Conner  P D Eckersall  T A Douglas 《Research in veterinary science》1988,44(3):391-393

Canine serum alpha 1-proteinase inhibitor is not a major acute phase reactant in the dog, unlike the equivalent protein in humans. The possibility that an alternative protease inhibitor system is stimulated during the acute phase response in the dog was investigated. alpha 2-macroglobulin was not an acute phase reactant, but an inhibitor of elastase was identified in canine serum which could be separated from proteinase inhibitor by gel filtration and which was shown to be an acute phase reactant. This protein has been named canine elastase inhibitor.  相似文献