Paper I — 2024 December (Supplementary) (2019 Scheme) — Qii

Paper I

2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

The etiological agent in the above diagnosis is

• a) Streptococcus pyogenes
• c) Staphylococcus aureus
• b) Streptococcus agalactiae
• d) Staphylococcus epidermidis

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Answer

- [x] a) Streptococcus pyogenes

Streptococcus pyogenes (Group A beta-haemolytic Streptococcus) is the causative agent of the streptococcal pharyngitis that triggers acute rheumatic fever and, with repeated infections, progressive rheumatic heart disease, via molecular mimicry between the streptococcal M protein and cardiac tissue antigens. S. agalactiae (Group B) is associated with neonatal sepsis/meningitis, not rheumatic fever; S. aureus and S. epidermidis are staphylococcal species associated with infective endocarditis and device-related infections respectively, not rheumatic heart disease.

Related Concepts

1. 1Streptococcal Infections

Other Years Asked

1. 1Enumerate four infections produced by streptococcus pyogenes and the virulence factors.2022 July (Supplementary) (2019 Scheme)Short Answer · 4 marks
2. 2Non-suppurative diseases of streptococcus pyogenes2021 February (Supplementary) (2010 Scheme)Short Note · 2 marks
3. 3Group B streptococci2017 August (Supplementary) (2010 Scheme)Short Note · 2 marks
4. 4Two non-suppurative sequelae of streptococcus pyogenes infection.2021 December (Supplementary) (2010 Scheme)Short Note · 2 marks
5. 5CAMP reaction2016 October (Supplementary) (2010 Scheme)Short Note · 2 marks