David L. Diehl

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The objective of this research was to investigate the ability of anaerobic and aerobic digesters to reduce the quantity of antibiotic resistant bacteria in wastewater solids. Lab-scale digesters were operated at different temperatures (22 °C, 37 °C, 46 °C, and 55 °C) under both anaerobic and aerobic conditions and fed wastewater solids collected from a(More)
NBI and MBI may enhance the diagnosis and characterization of mucosal lesions in the GI tract, particularly as adjunctive techniques to magnification endoscopy. Standardization of image characterization, further image-to-pathology correlation and validation, and the impact of these technologies on patient outcomes are necessary before endorsing the use of(More)
The American Society for Gastrointestinal Endoscopy (ASGE) Technology Committee provides reviews of new or emerging endoscopic technologies that have the potential to have an impact on the practice of GI endoscopy. Evidence-based methodology is used, with a MEDLINE literature search to identify pertinent preclinical and clinical studies on the topic and a(More)
Varices of the lower GI tract, although rare, are a known cause of hematochezia. They are usually found in a segmental distribution and are often associated with cirrhosis, portal hypertension, or portal vein obstruction. We present the case of a 43-year-old male with no personal or family history of liver disease, who experienced recurrent rectal bleeding(More)
BACKGROUND Patients who complain of constipation can be divided into those who have lost the natural call to stool, but develop abdominal discomfort after several days without a bowel movement (no urge); and those who experience a constant sensation of incomplete evacuation (urge). AIMS To determine whether the two groups differ in symptoms, colonic(More)
The ASGE Technology Committee provides reviews of existing, new, or emerging endoscopic technologies that have an impact on the practice of GI endoscopy. Evidence-based methodology is used, performing a MEDLINE literature search to identify pertinent clinical studies on the topic and a MAUDE (U.S. Food and Drug Administration Center for Devices and(More)
The ASGE Technology Committee provides reviews of existing, new, or emerging endoscopic technologies that have an impact on the practice of GI endoscopy. Evidence-based methodology is used, by using a MEDLINE literature search to identify pertinent clinical studies on the topic and a MAUDE (U.S. Food and Drug Administration Center for Devices and(More)
We determined the prevalence of hemorrhage within 1 disc diameter of the optic nerve head by masked examination of stereoscopic color and red-free fundus photographs in a multilayer study of 1123 patients. At the first (baseline) examination, disc hemorrhages were present in none of the normal subjects (0 of 661), 0.44% (6/1377) of "glaucoma suspect"(More)