Biomedical subjects
Publications and source records attributed to D L Dalton.
Elevated serum prostate-specific antigen secondary to acute bacterial prostatitis occurred in 2 patients. This cause of increased PSA has not been documented previously.
Two experiments were conducted to study digestion and utilization of dry and high moisture barley. Dry matter yield of dry barley was 2.99 tonnes/ha in contrast to 3.58 tonnes/ha for high moisture barley. In Experiment 1, 38 cows in early to midlactation were assigned to two diets (40% alfalfa hay; 9.4% supplement and 50.6% barley, DM basis) that differed only in the type of barley fed: diet 1, rolled dry barley, and diet 2, rolled high moisture barley. Although DM intake, milk yield, and 4% FCM were not significantly influenced by diet, cows fed diet 2 had higher milk persistency than those fed diet 1. In Experiment 2, three lactating cows fitted with ruminal and duodenal cannulae were assigned to three dietary treatments in a Latin square design. Diets 1 and 2 were as in Experiment 1, whereas diet 3 contained ground high moisture barley. Digestibility coefficients tended to be lower and duodenal starch percent higher for cows fed diet 3 than those fed diets 1 or 2. No significant dietary differences were observed in ruminal pH, VFA, or ammonia concentrations. Although ensiling and processing influenced the rate and extent of DM and CP degradation in situ, treatment did not influence effective degradability. Results suggest that the feeding value of high moisture barley for lactating cows is equivalent to dry barley on a DM basis.
Administration of progesterone (P4, .55 mg/kg) and estrone (E1, .275 micrograms/kg) during discrete periods in early gestation was found to have beneficial effects on conceptus development in gilts. Three trials were conducted, with each trial examining two hormone treatment groups and one control group. In all trials, P4-E1 supplementation for either one or both of the time periods examined resulted in larger (P less than .05) placentas at d 50 of gestation. Administration of exogenous P4-E1 from either d 20 to 30 (trial 1) or d 25 to 30 (trial 3) of gestation resulted in the greatest augmentation in placental development. In all three trials, exogenous P4-E1 elicited beneficial effects on areolae formation and development. In all nine groups examined (both P4-E1-treated and controls), a positive uterine artery minus uterine vein difference in progesterone concentration was found. This suggests that the conceptus is metabolizing progesterone to metabolites that may have a local effect within the pregnant uterus. It is suggested that augmentation of placental growth, as demonstrated in this study, may reduce secondary fetal death losses in latter gestation (i.e., post-d 70) due to placental insufficiency.
An example of a blind-ending branch of a bifid ureter in a woman presenting with a urinary tract infection is reported. Definition, diagnosis, and treatment of this anomaly are discussed.
The authors add an additional case to the 13 cases of malignant interstitial cell tumor of the testis previously reported in the literature. It has been thought that the hallmark of metastatic interstitial cell tumor of the testis is endocrinopathy secondary to production of hormones by the tumor. In the case reported here there were no clinical or chemical manifestations of any endocrinopathy, making this case unique.
Experimental and clinical aspects of calculogenesis about foreign bodies are reviewed. Factors such as infections, urine dilution, urinary pH, and suture materials are discussed from an investigative point of view. The various kinds of clinical foreign body stones reported are categorized according to the manner of introduction into the urinary tract and anatomic locations.
Two recent patients presenting with anuria due to abdominal aortic aneurysm and metastatic retroperitoneal tumor and illustrating this dramatic aspect of obstructive uropathy, provide the basis for this paper. Other reported causes of ureteral compression resulting in anuria are mentioned; these include billharzial strictures, iatrogenic ligatures, idiopathic retroperitoneal fibrosis, primary retroperitoneal tumors, and perirenal lymphocele.