In the WHO case classification for polio surveillance, an 'AFP case with virologically confirmed poliovirus' constitutes which category?
- A Compatible poliomyelitis
- B Confirmed poliomyelitis ✓
- C Discarded AFP case
- D Vaccine-associated paralytic polio (VAPP)
Correct answer: B. Confirmed poliomyelitis
Explanation
WHO AFP case classification: a case with two stool specimens collected ≥24 hours apart, within 14 days of onset, that tests positive for wild poliovirus or cVDPV is 'confirmed poliomyelitis'. A case with residual paralysis at 60-day follow-up but no virological confirmation is 'compatible'. A case that does not meet confirmed or compatible criteria and has an alternative diagnosis is 'discarded'. VAPP is a sub-category with specific epidemiological and virological criteria.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.