Better than Sketchy, and completely free. Watch our entire microbiology library right here on YouTube, for free, forever. Come check out the rest of our Step 1 library at https://physeo.com/ for a truly comprehensive approach to USMLE prep. Covered in this video: Clostridium tetani, bacteria, gram positive, bacilli, spore-forming, obligate anaerobe, spasms, arched back, exotoxin, lock jaw, tetanospasmin, motor neuron, risus sardonicus, SNARE proteins, GABA, glycine, renshaw cells, rusty nails