Bacteria US Medical PG Flashcards - Medical Study Cards
Master Bacteria with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.
Bacteria Flashcard Deck - 10 Cards
Flashcard 11: Clinical presentation and transmission of Pasteurella multocida?
Answer: Cellulitis, Osteomyelitis after animal bites (cats, dogs)
Extra: Pasteurella multocida is a Gram-negative coccobacillus. It is famously associated with wound infections following cat or dog bites. Treatment is typically Penicillin or Amoxicillin-clavulanate.
Flashcard 12: What disease is caused by Ehrlichia chaffeensis?
Answer: Human Monocytic Ehrlichiosis (HME)
Extra: Vector: Lone Star tick (Amblyomma americanum)\nHost: White-tailed deer\nCharacteristic: Morulae (mulberry-like inclusions) in monocytes
Flashcard 13: Disease and transmission of Chlamydophila psittaci?
Answer: Psittacosis (atypical pneumonia); transmitted via inhalation of infected bird droppings (e.g., parrots).
Extra: Psittacosis is characterized by high fever, headache, and a dry cough. It is an occupational hazard for bird owners, pet shop employees, and veterinarians.
Flashcard 14: What disease is caused by Borrelia recurrentis?
Answer: Epidemic relapsing fever
Extra: Transmission: Human body louse (Pediculus humanus corporis).
Characteristic: Antigenic variation leads to recurrent fever.
Flashcard 15: Common clinical condition associated with **Bartonella henselae**?
Answer: Cat scratch disease
Extra: Bartonella henselae is transmitted via cat scratches or bites. In immunocompromised patients, it (and B. quintana) can cause Bacillary Angiomatosis.
Flashcard 16: Jarisch-Herxheimer reaction
Answer: dying bacteria release pyrogens following abx administration
Extra: flu-like symptoms shortly after beginning antibiotic regimen
Flashcard 17: syphilis
Answer: Treponema pallidum
Extra: painless chancre on genitals RPR or VDRL penicillin G
Flashcard 18: Treponema pallidum is not readily visible on which common microbiological stain?
Answer: Gram stain (too thin to be seen) :: Why is it not readily stainable?
Extra: Treponema pallidum is a spirochete. It is typically visualized using dark-field microscopy or immunofluorescence. It causes Syphilis and is treated with Penicillin G.
Flashcard 19: Describe the staining and morphological characteristics of Borrelia burgdorferi.
Answer: Gram-negative spirochete (poorly staining), visualized with Wright or Giemsa stain.
Extra: Borrelia burgdorferi:
• Disease: Lyme disease
• Vector: Ixodes tick (deer tick)
• Reservoir: White-footed mouse
• Treatment: Doxycycline (early), Ceftriaxone (late/disseminated)
• Note: While Gram-negative, spirochetes are often too thin to be seen with standard Gram staining and require Giemsa/Wright stains or Darkfield microscopy.
Flashcard 20: bacterial vaginosis
Answer: Gardnerella vaginalis
Extra: gray vaginal discharge, fishy smell clue cells (bacteria covering edges of vaginal epithelial cell)
sexual activity (but not an STI!)
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