Texas Cosmetology Operator Written ExamSanitation, Disinfection, and SafetyMedium
Which of the following terms describes bacteria that grow in pairs and can cause diseases such as pneumonia and gonorrhea?
- ASpirilla
- BDiplococci
- CStaphylococci
- DStreptococci
Show answer & explanationAnswer & explanation
Correct answer: B. Diplococci
Diplococci are spherical bacteria that grow in pairs. The prefix 'Di-' means two, and 'cocci' refers to their round shape, hence 'two cocci'. These are known to cause diseases like pneumonia and gonorrhea.
Why the other options are wrong
- A. Spirilla are spiral or corkscrew-shaped bacteria, causing diseases like syphilis and Lyme disease.
- C. Staphylococci are pus-forming bacteria that grow in clusters, like bunches of grapes.
- D. Streptococci are pus-forming bacteria arranged in curved lines resembling a string of beads, causing strep throat and blood poisoning.
Diplococci
Spherical bacteria that grow in pairs and can cause diseases such as pneumonia and gonorrhea.
- Round shape (cocci).
- Arranged in pairs (di-).
- Examples: Neisseria gonorrhoeae (gonorrhea), Streptococcus pneumoniae (pneumonia).
Memory trick: Di- means two, like a pair of dice.