Out of the pathogens in the roadmap, which ones cause characteristic symptoms that include chronic sore throat (without other flu-like symptoms)? I have tested negative for CMV and HHV-6. I should get Echovirus and Coxsackievirus B results next week. In the absence of an obvious infectious agent, I think we can continue searching for a pathogen. Would Parvovirus B19 cause a sore throat? I also have a positive result for EBV VCA-IgM, but we suspect it to be a false positive because retested moths later, other antibodies haven't appeared. Are there any throat swab tests that could be useful in identifying a pathogen or eliminating pathogens from suspicion?