Zoonotic bacterial infections — Flashcards

Flashcard 1: Which spirochete is described as question mark shaped?_____

Answer: Leptospira interrogans

Flashcard 2: What is the shape of Borrelia burgdorferi?_____

Answer: Spirochete

Flashcard 3: Which zoonotic bacteria is oxidase positive?_____

Answer: Pasteurella multocida

Flashcard 4: What is the reservior for Francisella tularensis?_____

Answer: Rabbits

Flashcard 5: How is Pasteurella multocida most commonly transmitted?_____

Answer: Dog or Cat bites

Flashcard 6: Rocky Mountain spotted fever

Answer: Rickettsia rickettsii

Extra: Clinical features: Headache, fever, and rash beginning on wrists and ankles, progressing to trunk, palms, and soles. Treatment: Doxycycline

Flashcard 7: epidemic typhus

Answer: Rickettsia prowazeckii

Extra: rash that begins centrally and spreads but spares palms and solesdoxycycline

Flashcard 8: Ehrlichiosis (Causative agent)

Answer: Ehrlichia chaffeensis

Extra: Monocytes with morula (berry-like) inclusions. Note: Human Monocytic Ehrlichiosis (HME) is caused by E. chaffeensis, while Human Granulocytic Anaplasmosis (HGA) is caused by Anaplasma phagocytophilum.

Flashcard 9: What is the causative agent of Human Granulocytic Anaplasmosis?

Answer: Anaplasma phagocytophilum (carried by Ixodes tick) :: causative agent

Extra: Characteristic finding: Granulocytes with morulae (mulberry-like cytoplasmic inclusions). Note: Human Monocytic Ehrlichiosis (HME) shows morulae in monocytes.

Flashcard 10: Causative agent of Q fever?

Answer: Coxiella burnetii

Extra: Pneumonia and hepatitis are common presentations. Unlike other Rickettsial diseases, it does not cause a rash and is transmitted via aerosol, not an arthropod vector.