Robert H. Hall

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Isogenic mutant strains of V. cholerae O1 lacking elements of a genetic regulon controlled by toxR and implicated in virulence were tested in volunteers. A deletion mutation in ctxA, the gene encoding the A subunit of cholera toxin, markedly attenuated disease symptoms without affecting intestinal colonization. Deletion of toxR, the gene encoding the(More)
The views and conclusions contained in this document are those of the author and should not be interpreted as representing the official policies, either expressed or implied, of any sponsoring institution, the U.S. government or any other entity. Abstract In many real-world applications of supervised learning, only a limited number of labeled examples are(More)
Important biomedical information is often recorded, published or archived in unstructured and semi-structured textual form. Artificial intelligence and knowledge discovery techniques may be applied to large volumes of such data to identify and extract useful metadata, not only for providing access to these documents, but also for conducting analyses and(More)
The International Federation of Societies of Toxicologic Pathologists (IFSTP) proposes a common global framework for training future toxicologic pathologists who will support regulatory-type nonclinical toxicology studies. Trainees optimally should undertake a scientific curriculum of at least 5 years at an accredited institution leading to a clinical(More)
b W e were disappointed to read the Journal of Clinical Microbiology (JCM) editor in chief's recent editorial " An Obituary for the Case Report in Journal of Clinical Microbiology " (1). Despite the steady increase in the number of case reports published , the editorial board reportedly decided that case reports seldom add truly significant information to(More)
Carnegie Mellon University does not discriminate and if required not to discriminate in violation of federal, state, or local laws or executive orders. Inquiries concerning the application of and compliance with this statement should be directed to the vice president for campus affairs, The views and conclusions contained in this document are those of the(More)
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