A 3-year-old girl is brought to the clinic because of a 3-day history of high fever, cough, and difficulty breathing. Several other children at her daycare have had similar symptoms over the past week. She has no history of major medical illness. Her temperature is 39.1°C (102.4°F), pulse is 118/min, and respirations are 32/min. Physical examination shows scattered rhonchi bilaterally without focal consolidation. Laboratory studies show a positive rapid influenza test for influenza A.
Which of the following pattern recognition receptors is most likely responsible for detecting this pathogen's genetic material?