Koplik spots is a feature of -
Presence of Koplik&;s spot is pathognomic of measles. They are like table salt crystals appear on buccal mucosa opposite the first and second lower molars. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition pg 147
Rubella
Measles
Tetanus
Mumps
Communicable diseases