In this episode, I discuss HY information relating to all the gram negatives highlighted in the gram negative algorithm in First Aid For The USMLE Step 1 (2019). I integrate a lot of HY basic science disciplines along the way. I also discuss the zoonotics (brucella, pasteurella, Ehrlichia, Rickettsia), chlamydia species, syphilis, and lyme disease (B. Burgdorferi). Between Episodes 77 and 78 and a good knowledge of antibiotics (earlier podcasts), you should be able to crush a large number of “bacteria” questions with the notable exception of Mycobacterial Species which are discussed in an older podcast. There are no attached slides.