NIC Nail Technician Written ExamScientific ConceptsMedium
A client presents with a localized bacterial infection on their finger, characterized by pus, redness, and swelling. Microscopic examination reveals spherical-shaped bacteria occurring in grape-like clusters. This morphology is characteristic of:
- AStreptococci
- BStaphylococci
- CBacilli
- DSpirilla
Show answer & explanationAnswer & explanation
Correct answer: B. Staphylococci
Staphylococci are spherical-shaped bacteria that grow in irregular, grape-like clusters. They are commonly associated with skin infections, abscesses, and boils, which aligns with the client's symptoms.
Why the other options are wrong
- A. Streptococci are spherical bacteria arranged in chains, not clusters.
- C. Bacilli are rod-shaped bacteria.
- D. Spirilla are spiral or corkscrew-shaped bacteria.
Bacterial Morphology (Cocci)
The study of the shapes of bacteria, particularly spherical forms known as cocci, and their arrangements.
- Cocci are spherical or oval-shaped bacteria.
- Staphylococci form grape-like clusters.
- Streptococci form chains.
Memory trick: Staph = clusters like 'grapes', Strep = 'strips' like a chain, Bacilli = 'rods', Spirilla = 'spirals'.