Publications by authors named "A Niehaus"

There is limited information on rationale for the current training structure within combined Pediatrics-Medical Genetics and Genomics Residency (MGG) residency programs. This study addresses the benefits and drawbacks of different training structures. Program Directors (PDs) and Associate PDs of combined Pediatrics-MGG residency programs were surveyed to evaluate perceived benefits of different structures and the relative importance of particular pediatric rotations for combined training.

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Here, we report an individual, eventually diagnosed with HMG-CoA synthase deficiency, who presented with a cyclic vomiting phenotype. HMG-CoA synthase deficiency is a rare disorder affecting ketone body synthesis in which affected individuals typically present at a young age with hypoketotic hypoglycemia, lethargy, encephalopathy, and hepatomegaly, usually triggered by catabolism (e.g.

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Article Synopsis
  • Osteoarthritis is a significant health issue in geriatric gazelles, and a case study highlights a male sand gazelle suffering from progressive osteoarthritis of the right tarsus, resulting in chronic lameness.
  • Serial biopsies and diagnostic imaging revealed the presence of pyogranulomatous dermatitis and a bacterial infection that is typically associated with cattle but had not been documented in other species, including gazelles.
  • Despite various treatments, the condition worsened, leading to the animal's euthanasia, where postmortem analysis showed extensive tissue damage and revealed a new possibly infectious bacterium that could be a factor in chronic osteoarthritis in gazelles.
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The state of California (CA) added X-linked adrenoleukodystrophy (X-ALD) to newborn screening (NBS) in 2016 via the measurement of C26:0-lysophosphatidylcholine (C26:0-LPC) in a two-tier fashion, followed by sequencing of the gene. This has resulted in the identification of individuals with genetic conditions beyond X-ALD that can also result in elevated C26:0-LPC by NBS. We describe the biochemical, molecular, and clinical characteristics of nine patients from two metabolic centers in California who screened positive by NBS for elevated C26:0-LPC between 2016 and 2022 and were ultimately diagnosed with a genetic condition other than X-ALD.

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Anthelmintic resistance to Haemonchus contortus creates increasing management challenges with small ruminants and camelids. The commercial vaccine, Barbervax®, contains H11 and H-gal-GP antigens, derived from gut mucosal membrane enzymes of H. contortus involved in digesting blood.

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