These videos are newer additions and are critical for the increasing number of parasitology questions on Step 1.
| Video # | Title | Key Organisms | | :--- | :--- | :--- | | 47.1 | Plasmodium (Malaria) | Falciparum, Vivax, Ovale, Malariae | | 48.1 | Toxoplasma gondii | Congenital infection (Cat feces) | | 49.1 | Giardia lamblia | Beaver fever (Fatty stool) | | 50.1 | Entamoeba histolytica | Flask-shaped ulcers (Liver abscess) | | 51.1 | Trichomonas vaginalis | Strawberry cervix (Flagellated) | | 52.1 | Tapeworms (Cestodes) | T. solium (Neurocysticercosis) | | 53.1 | Nematodes (Roundworms) | Ascaris, Hookworm, Pinworm | | 54.1 | Trematodes (Flukes) | Schistosoma (Swimmer's itch) |
Number of videos: ~25
This is where the magic started. You’ll memorize Staph and Strep first. Sketchy Micro Videos List-
These organisms do not Gram-stain well. Sketchy covers them in the "Mansion of Horrors."
| Video # | Title | Key Organisms | | :--- | :--- | :--- | | 21.1 | Mycobacterium tuberculosis | TB (Cavitary lesions, Pott disease) | | 21.2 | Mycobacterium leprae | Leprosy (Hansen's disease) | | 22.1 | Treponema pallidum | Syphilis (Primary, Secondary, Tertiary) | | 23.1 | Borrelia burgdorferi | Lyme disease (Erythema migrans) | | 24.1 | Rickettsia (Group) | Rocky Mountain Spotted Fever, Typhus | | 25.1 | Chlamydia (Group) | Trachoma, LGV, Pneumonia | | 26.1 | Mycoplasma pneumoniae | Walking pneumonia (Cold agglutinins) |
| Video Name | Key Organism / Topic | High-Yield Takeaway | | :--- | :--- | :--- | | Rhinovirus | Common cold | Acid labile; >100 serotypes. | | Polio | Poliomyelitis | Flaccid paralysis; Salk/Sabin vaccines. | | Coxsackie A & B | HFMD/Myocarditis | A: Herpangina; B: Pleurodynia. | | Hepatitis A & E | Enteric hepatitis | Fecal-oral; no chronic form. | | Rubella | German measles | Congenital: PDA, cataracts, deafness. | | Measles (Rubeola) | Measles | Koplik spots; 3 Cs (Cough, Coryza, Conjunctivitis). | | Mumps | Parotitis | Orchitis (risk of sterility). | | Respiratory Syncytial Virus (RSV) | Bronchiolitis | Fusing cells (syncytia); palivizumab. | | Parainfluenza | Croup | "Barking cough" (Parainfluenza 1 & 2). | | Influenza | Flu | Antigenic drift/shift; Oseltamivir (neuraminidase inhibitor). | | Rotavirus | Pediatric diarrhea | "Wheel" shape; vaccine. | | Norovirus | Cruise ship virus | Winter vomiting disease. | | Coronavirus (SARS, MERS, COVID-19) | SARS/Severe respiratory | Enveloped; RNA dependent RNA polymerase. | These videos are newer additions and are critical
For medical students, navigating the vast sea of microbiology for the USMLE Step 1 is often a nightmare. With hundreds of bacteria, viruses, fungi, and parasites to memorize, traditional flashcards and lectures frequently fail to cement long-term recall.
Enter SketchyMicro.
By pairing visual memory triggers (symbols, colors, and stories) with high-yield facts, SketchyMicro has revolutionized how students learn bugs and drugs. However, with over 100 videos across the main and supplemental series, keeping track of what to watch—and in what order—is challenging. Number of videos: ~25 This is where the magic started
This article provides the complete, categorized Sketchy Micro videos list for 2025. Whether you are an M2 preparing for dedicated or an M1 trying to survive your ID block, use this guide to track your progress.
| Video Name | Key Organism / Topic | High-Yield Takeaway | | :--- | :--- | :--- | | Staphylococcus Aureus | Staph aureus | Catalase positive, coagulase positive; abscesses, food poisoning, TSS. | | Staphylococcus Epidermidis | Staph epi | Coagulase negative; sticky slime layer on catheters/prosthetics. | | Saprophyticus | Staph saprophyticus | UTI in young sexually active women; novobiocin resistant. | | Streptococcus Pyogenes | Group A Strep (GAS) | Bacitracin sensitive; pharyngitis, rheumatic fever, glomerulonephritis. | | Streptococcus Agalactiae | Group B Strep (GBS) | Neonatal meningitis/sepsis; Camp test positive. | | Streptococcus Pneumoniae | Strep pneumo | Alpha hemolytic, optochin sensitive; vaccine-preventable. | | Viridans Group | Strep viridans | Alpha hemolytic; dental caries; subacute endocarditis. | | Enterococcus Faecalis/Faecium | Enterococcus | PYR positive; VRE (Vancomycin resistant). |
Often neglected, these are "make or break" points for a high score.