Definitions in Infectious Diseases
DEFINITIONS
- Bacteria = single celled prokaryotic organism.
- Eukaryote = organism that possess a cell nucleus and other organelles.
- Fungi = eukaryotic organisms that absorb their food from other living or dead organisms.
- Parasite = an organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host organism.
- Prokaryote = organisms that lack a cell nucleus (= karyon), or any other membrane-bound organelles.
- Protozoa = A single-cell organism that can only divide within a host organism.
- Rickettsiae = non-motile, Gram-negative, non-spore forming, highly pleomorphic bacteria (it is an obligate intracellular parasite as it reproduction depends on being inside a eukaryotic cell).
- Spirochaetes = spiral-shaped gram negative bacteria
- Virus = ultramicroscopic, metabolically inert infectious agent that replicates within the cells of living hosts – composed of RNA or DNA core, protein coat +/- surrounding envelope.

Critical Care
Compendium
Chris is an Intensivist and ECMO specialist at The Alfred ICU, where he is Deputy Director (Education). He is a Clinical Adjunct Associate Professor at Monash University, the Lead for the Clinician Educator Incubator programme, and a CICM First Part Examiner.
He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives. He was one of the founders of the FOAM movement (Free Open-Access Medical education) has been recognised for his contributions to education with awards from ANZICS, ANZAHPE, and ACEM.
His one great achievement is being the father of three amazing children.
On Bluesky, he is @precordialthump.bsky.social and on the site that Elon has screwed up, he is @precordialthump.
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