- Viral, eg, adenovirus, herpes simplex virus (HSV)
- Group A streptococci
- Infectious mononucleosis
- Gonorrhea
- Mycoplasma
- Chlamydia pneumoniae
- Influenza
- Diphtheria
- Necrotizing gingivostomatitis (Vincent’s angina, trench mouth)
- Arcanobacterium haemolyticum
Other causes of sore throat
- Peritonsillar abscess
- Oral candidiasis
- Epiglottitis
- Acute HIV infection
- Dry mouth (xerostomia)
- Nasopharyngeal carcinoma
- Glossopharyngeal neuralgia
- With rash: meningococcemia, toxic shock syndrome, drug eruption, viral exanthem