Discussion
Match the pathogen with the appropriate disease.
| Pathogen | Disease |
|---|---|
| (P) Streptococcus pyogenes | (i) Scarlet fever |
| (Q) Brucella species | (ii) Pott's disease |
| (R) Mycobacterium tuberculosis | (iii) Traveler's diarrhea |
| (S) Escherichia coli | (iv) Undulant fever |
Answer: C
The correct match is (P)-(i), (Q)-(iv), (R)-(ii), (S)-(iii).
- Streptococcus pyogenes, group A streptococcus, causes scarlet fever through its erythrogenic (pyrogenic) toxins (i).
- Brucella species cause brucellosis, known as undulant fever for its rising and falling temperature (iv).
- Mycobacterium tuberculosis infecting the spine causes Pott's disease, tuberculous spondylitis (ii).
- Enterotoxigenic Escherichia coli is the commonest cause of traveler's diarrhea (iii).
Options A and B give scarlet fever to the wrong pathogen and Pott's disease to S. pyogenes, and option D swaps the diseases of M. tuberculosis and E. coli.
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