Publications by authors named "L H du Preez"

Background: Teaching medical students in the clinical setting is frequently perceived as a demanding commitment by attending physicians. There is a paucity of data measuring the duration and efficacy of teaching during clinical rounds.

Aim: The aim of this study was to assess both the quantity and quality of clinical teaching time dedicated to medical students on hospital ward rounds.

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The African savanna elephant (Loxodonta africana) is the largest terrestrial animal on Earth and is found primarily in Southern and Eastern Africa. It is a hindgut, colonic fermenter and subsists on a diet of raw plant materials found in its grazing area. In this study the bacterial, archaeal and fungal populations of seven African savanna elephant fecal metagenomes were first characterized using amplicon sequencing.

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A 67-year-old female underwent a computed tomography angiogram (CTA) of the head in the setting of acute, short-term memory loss. Two lobulated hyperattenuating lesions were incidentally discovered at the base of the tongue and the hyoid bone. Upon further investigation in the outpatient setting including further imaging and ultrasound-guided biopsy, the lesions were confirmed to be ectopic thyroid tissue with dual ectopy.

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Article Synopsis
  • A study on Common River Frogs in South Africa revealed the presence of microplastics (MPs) in various tissues, indicating potential environmental exposure.
  • Researchers analyzed five sample types and found a total of 1128 MPs, with fibers being the most common, mostly made of polyester and polyvinyl alcohol.
  • The research suggests that microplastics could move up the food chain and highlights the need for further studies on their impact on frog health and ecosystems.
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The COVID-19 pandemic has highlighted our reliance on biocides, the increasing prevalence of resistance to biocides is a risk to public health. Bacterial exposure to the biocide, benzalkonium chloride (BAC), resulted in a unique transcriptomic profile, characterised by both a short and long-term response. Differential gene expression was observed in four main areas: motility, membrane composition, proteostasis, and the stress response.

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