Texas Cosmetology Operator Written ExamSanitation, Disinfection, and SafetyMedium
Which type of bacteria are rod-shaped and can cause diseases such as tetanus, tuberculosis, and diphtheria?
- ABacilli
- BSpirilla
- CCocci
- DStreptococci
Show answer & explanationAnswer & explanation
Correct answer: A. Bacilli
Bacilli are rod-shaped bacteria and are responsible for many common and serious diseases including tetanus, typhoid fever, tuberculosis, and diphtheria.
Why the other options are wrong
- B. Spirilla are spiral or corkscrew-shaped bacteria.
- C. Cocci are round-shaped bacteria, often appearing in clusters or chains.
- D. Streptococci are a specific type of cocci (round bacteria in chains), not rod-shaped.
Bacilli Bacteria
Bacilli are rod-shaped bacteria, many of which are pathogenic and can cause serious diseases.
- Rod-shaped morphology.
- Can be motile (flagella).
- Includes bacteria causing tetanus, TB, typhoid.
Memory trick: Rod-shaped 'bats' cause 'bad' diseases, like tetanus that brings you to your knees.