A Fast-Pass, Desorption Electrospray Ionization Mass Spectrometry Strategy for Untargeted Metabolic Phenotyping.

Desorption electrospray ionization mass spectrometry imaging (DESI-MSI) provides direct analytical readouts of small molecules that can be used to characterize the metabolic phenotypes of genetically engineered bacteria. In an effort to accelerate the time frame associated with the screening of mutant libraries, we have developed a high-throughput DESI-MSI analytical workflow implementing a single raster line-scan strategy that facilitates the collection of location-resolved molecular information from engineered strains on a subminute time scale. Evaluation of this "Fast-Pass" DESI-MSI phenotyping workflow on analytical standards demonstrated the capability of acquiring full metabolic profiling information with a throughput of ∼40 s per sample.

Ion mobility spectrometry and ion mobility-mass spectrometry in clinical chemistry.

Advancements in clinical chemistry have major implications in terms of public health, prompting many clinicians to seek out chemical information to aid in diagnoses and treatments. While mass spectrometry (MS) and hyphenated-MS techniques such as LC-MS or tandem MS/MS have long been the analytical methods of choice for many clinical applications, these methods routinely demonstrate difficulty in differentiating between isomeric forms in complex matrices. Consequently, ion mobility spectrometry (IM), which differentiates molecules on the basis of size, shape, and charge, has demonstrated unique advantages in the broad application of stand-alone IM and hyphenated IM instruments towards clinical challenges.

Herpes simplex virus presenting as an oropharyngeal mass.

Objectives: Present a clinically challenging case of an immunocompetent 74-year-old male who presented with marked dyspnea and hemoptysis. After the airway was secured, direct laryngoscopy revealed a large, fungating, hemorrhagic mass of the left lateral pharyngeal wall and surrounding structures.

Methods: Chart review of a single patient.

Changes to provision of childbirth education during COVID-19 and its implications for ongoing service delivery - An Australian Survey.

Background: Childbirth and parenting education (CBPE) programs provide participants with information about pregnancy and labour and have a multitude of positive health impacts. During COVID-19, many CBPE classes ceased or transitioned to an online format, significantly impacting pregnant women across Australia. Little is known about the provision and delivery of CBPE in Australia during the COVID-19 pandemic from the perspective of CBPE educators and hospital managers, regarding its impact on staff and implications for ongoing service delivery.