The characteristic features of Measles (Rubeola) that differentiate it from German measles (Rubella) are–

Correct option is A

Sol. Measles (Rubeola) is a viral illness marked by high fever, cough, coryza, conjunctivitis, and Koplik spots (tiny white lesions inside the cheeks), which appear before the typical rash. These features differentiate it from Rubella (German measles), which is milder, with low-grade fever and no Koplik spots.
Explanation of each option:
· (a) A high fever and Koplik spots – Correct Answer. Pathognomonic sign of measles. These spots are absent in rubella. Fever in measles is higher and more pronounced.
· (b) A rash on the trunk with pruritus – Common in rubella and not exclusive to measles. Measles rash typically starts at the hairline and moves downward.
· (c) Nausea, vomiting and abdominal cramps – Not typical of either measles or rubella. These symptoms are more related to GI infections.
· (d) Signs similar to cold with rash – Found in both illnesses, making this a nonspecific feature that doesn’t differentiate them clearly.