Cat-Scratch Disease Causative Agent
Cat-scratch disease is a bacterial infection primarily transmitted to humans through bites or scratches from infected cats, most commonly kittens.
The specific organism responsible for Cat-scratch disease is:
- Bartonella henselae
This Gram-negative bacterium is the confirmed etiological agent.
Analysis of Options
Let's examine why the other options are incorrect:
- Chlamydia trachomatis: Causes infections like trachoma (an eye infection) and sexually transmitted infections.
- Coxiella burnetii: The agent responsible for Q fever, a febrile illness often associated with livestock.
- Trypanosoma cruzi: Causes Chagas disease, prevalent in Central and South America.
Therefore, Bartonella henselae is the correct cause of Cat-scratch disease.
Important Questions from Bacterial Infections
Which of the following are major criteria under the Jones Criteria for Acute Rheumatic Fever?
1. Chorea
2. Erythema Marginatum
3. Subcutaneous Nodules
4. Polyarthralgia
Select the correct answer using the code given below:
- Whipple's disease is characterized by the infiltration of small intestinal mucosa by 'foamy' macrophages. Which one of the following histological stains is characteristically used to stain them?
- A young male presented with recent onset urethral discharge and dysuria. On examination, the discharge was profuse and purulent. Microscopy of smears from the discharge revealed Gram-negative diplococci. What is the likely diagnosis?
Which of the following drugs is/are useful in the treatment of Listeria monocytogenes infection?
1. Ceftriaxone
2. Gentamicin
3. Ampicillin
4. Sulfamethoxazole
Select the correct answer using the code given below.
Which of the following statements are correct regarding brucellosis?
1. Fever may develop into an undulating pattern that persists for weeks.
2. Associated musculoskeletal symptoms are a feature of the disease.
3. Brucellae behave as facultative intracellular parasites.
Select the correct answer using the code given below.
