• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 971
  • 413
  • 56
  • 30
  • 18
  • 17
  • 11
  • 8
  • 6
  • 4
  • 4
  • 4
  • 4
  • 4
  • 4
  • Tagged with
  • 1721
  • 789
  • 230
  • 156
  • 137
  • 127
  • 122
  • 118
  • 112
  • 111
  • 106
  • 93
  • 91
  • 79
  • 77
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
221

Sperm abnormalities in the dog : a light and electron microscopic study

Oettlé, Edmund Eric January 1990 (has links)
This thesis is a systematic description of normal and abnormal dog spermatozoa by means of bright field light and transmission electron microscopy, and an investigation into the effect that abnormal sperm have on canine fertility. A total of 101 ejaculates were collected from 88 dogs, of 34 different breeds. Sperm samples were examined macroscopically for volume, colour, consistency, and pH. Microscopic evaluation of sperm motility was conducted on all samples. Morphological evaluation using light microscopy was conducted on 71 of the samples. Samples from 10 of the dogs were examined ultrastructurally. A novel classification for abnormal dog sperm is presented. Abnormal sperm were classified into one of the following groups: Acrosomal defects, head defects, midpiece defects, tail defects and other abnormalities. Abnormalities were further sub-divided into major and minor defects. The most common abnormalities encountered were major sperm head defects. The abnormalities are compared with those described for other species, in particular the bull and man. The association between the percentage abnormal sperm in the ejaculate and the fertility of the dog was statistically evaluated. On this basis, the dogs were divided into normal and sub-normal groups. The percentage normal morphology below which fertility was adversely affected was found to be sixty percent. The fertility of dogs with greater than or equal to 60 percent normal morphology was 61 percent, while the fertility of dogs with · less than 60 percent normal morphology was 13 percent. There was no statistical difference between the ages of the dogs in the two groups; from this it was concluded that sub-fertility may affect a dog at any age. A means of evaluating dogs for reproductive potential is discussed.
222

Haemostatic abnormalities in canine spirocercosis

Pazzi, Paolo 26 June 2013 (has links)
Spirocerca lupi (S. lupi) is a nematode that infects the dog’s oesophagus resulting in an inflammatory fibroblastic nodule that progresses to a sarcoma in approximately 25% of cases. Inflammation, coagulation and cancer are exquisitely intertwined and inflammatory changes are known to lead to coagulation abnormalities. The nature and degree of haemostatic alterations in canine spirocercosis are unknown. Evidence of inflammation in dogs with clinical spirocercosis is provided by pyrexia, leucocytosis, increased serum interleukin 8 and C-reactive protein as well as severe inflammatory infiltrates on histopathology of nodules. This study aimed to determine if haemostatic abnormalities exist in canine spirocercosis, and hypothesised that the severity of abnormalities could be used to differentiate non-neoplastic from neoplastic spirocercosis. Thirty-nine client-owned S. lupi-infected dogs and 15 healthy age- and sex-matched control dogs were included in this study. Blood samples were collected at the time of diagnosis. A complete blood count, prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen concentration, antithrombin (AT) activity, D-dimer concentration and thromboelastography (TEG) analysis were performed. Hypercoagulability was based on the maximum amplitude (MA) value derived from TEG. Inflammatory parameters were also determined and included C-reactive protein (CRP) and fibrinogen concentrations. The S lupi-infected dogs were divided into a non-neoplastic group (n=24) and a neoplastic group (n=15). Data were compared using the Kruskal-Wallis Test and Dunn’s multiple comparisons applied post-hoc. Correlation was determined using Spearman’s correlation. Hypercoagulabilty was found in the neoplastic and non-neoplastic spirocercosis cases. In addition, the neoplastic group was significantly more hypercoagulable than the non-neoplastic group, and the non-neoplastic group was significantly more hypercoagulable than the control group. The median fibrinogen concentration was significantly higher in the neoplastic group compared to the non-neoplastic group, but there was no significant difference between the non-neoplastic and control group. The median CRP concentration was significantly higher in the neoplastic group compared to the non-neoplastic group, with no significant difference between the non-neoplastic and control group. Compared to the control group the median AT activity was significantly decreased in both the non-neoplastic and neoplastic groups. No significant difference was found between the infected groups. Across the non-neoplastic and neoplastic groups, MA showed positive linear correlation with CRP and fibrinogen. The study showed that spirocercosis is associated with a hypercoagulable state that becomes progressively more severe with neoplastic transformation. Overlap did exist between the median MA values of the non-neoplastic and neoplastic groups, but an MA of >76 mm provided a specificity of 96% and sensitivity of 73% for the differentiation of disease state. Thromboelastography might therefore be used as an adjunctive assay to support the suspicion of neoplastic transformation of the oesophageal nodule as well as to determine the overall haemostatic status of the patient. The MA correlated positively with the indicators of inflammation (CRP&fibrinogen) supporting the hypothesis that an inflammatory state induced by the S. lupi nodule is at least partly responsible for the hypercoagulability. The link between inflammation, coagulation and neoplastic transformation in spirocercosis warrants further investigation to elucidate the exact factors resulting in the hypercoagulable state, whether clinically relevant complications develop and whether or not specific therapy should be instituted to prevent thrombotic sequelae. / Dissertation (MMedVet)--University of Pretoria, 2012. / Companion Animal Clinical Studies / unrestricted
223

An experimental study of position and object discrimination in the dog.

Clarke, Ronald Scott. January 1951 (has links)
No description available.
224

A neurogenic component in the capacitance vessel pressure-volume response of the dog

Drees, John Allen January 1972 (has links)
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
225

A physical chemical study of serum lipoproteins of the dog /

Leet, Richard Hale January 1952 (has links)
No description available.
226

Toxic and therapeutic evaluation of stilbamidine and hydroxystilbamidine in canine blastomycosis /

Lagacé, André January 1957 (has links)
No description available.
227

Investigations on naturally occurring and experimentally induced lymphocytic thyroiditis in dogs /

Gosselin, Sylvie Jacqueline January 1980 (has links)
No description available.
228

An epidemiologic study of canine multiple primary neoplasia /

Bender, Alan Paul January 1980 (has links)
No description available.
229

Anatomical, ultrastructural and biochemical features of the canine uterine tube (oviduct) /

Del Campo, Carlos Humberto January 1980 (has links)
No description available.
230

Investigations on the pathogenesis of hypercalcemia and malignancy in dogs.

Meuten, Donald John January 1981 (has links)
No description available.

Page generated in 0.0389 seconds