Campylobacter jejuni US Medical PG Flashcards - Medical Study Cards
Master Campylobacter jejuni 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.
Campylobacter jejuni Flashcard Deck - 10 Cards
Flashcard 1: What is the shape and stain of Campylobacter jejuni?_____
Answer: Gram negative curved rod
Flashcard 2: Mesenteric adenitis is most commonly associated with _____
Answer: Yersinia enterocolitica (bug)
Flashcard 3: What are the common reservoirs and the vector for Yersinia pestis?
Answer: Reservoirs: Rats and prairie dogs; Vector: Fleas (Xenopsylla cheopis)
Extra: Yersinia pestis is a Gram-negative coccobacillus showing bipolar staining (safety-pin appearance). It causes the plague. \nReservoirs in the US: Prairie dogs. \nVector: Rat flea.
Flashcard 4: What disease is caused by Rickettsia typhi?
Answer: Endemic typhus (Murine typhus) :: vector?
Extra: Vector: Rat flea (Xenopsylla cheopis)
Flashcard 5: Name the disease caused by Francisella tularensis.
Answer: Tularemia
Extra: Reservoir: Rabbits
Vector: Ticks, deer flies
Route: Dermally via bite or handling infected carcass; also inhalation (potential bioterrorism agent).
Flashcard 6: What disease is caused by Coxiella burnetii?
Answer: Q fever
Extra: Coxiella burnetii is an obligate intracellular Gram-negative bacterium. Its primary reservoirs are cattle, sheep, and goats. It is transmitted via inhalation of contaminated aerosols from birthing products (amniotic fluid, placenta).
Flashcard 7: What disease is caused by Brucella spp. and what is its most common mode of transmission?
Answer: Brucellosis; Consumption of unpasteurized dairy products (e.g., goat milk, cheese)
Extra: Brucella is a Gram-negative aerobic coccobacillus. It is a facultative intracellular organism that survives in macrophages. Clinical features include undulant fever, hepatosplenomegaly, and lymphadenopathy.
Flashcard 8: Characteristics and clinical presentation of Yersinia enterocolitica?
Answer: Gram-negative coccobacilli; causes mesenteric adenitis (pseudoappendicitis), enterocolitis.
Extra: Transmission: Pet feces (e.g., puppies), contaminated milk, or pork.
Clinical: Can mimic Crohn's disease or appendicitis (mesenteric adenitis).
Key feature: Cold enrichment (grows at 4°C).
Flashcard 9: What is the causative agent of Cholera?
Answer: Vibrio cholerae
Extra: Profuse \"rice-water\" diarrhea. Treatment: Oral or IV rehydration.
Mechanism: Cholera toxin (choleragen) increases cAMP, leading to secretion of Cl- and H2O into the gut lumen.
Flashcard 10: What is the characteristic shape and preferred growth media (pH) for Vibrio cholerae?
Answer: Comma-shaped; Alkaline media (pH 8.5–9.5)
Extra: Vibrio cholerae characteristics:
- Gram-negative, comma-shaped bacilli
- Highly motile (darting motility)
- Oxidase positive
- Grows on alkaline media like TCBS (Thiosulfate Citrate Bile Salts Sucrose) agar
- Causes Cholera (rice-water stools)
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