What should you know about diphtheria differential diagnosis?

A clinician considers the onset and pattern of sore throat, fever, hoarseness, swollen neck glands, breathing or swallowing difficulty, and any coating over the throat. They also ask about vaccination, travel, contact with a suspected case, and previous antibiotics. Other bacterial or viral throat infections can look similar, so appearance alone cannot confirm diphtheria. A sample from the throat may be collected for laboratory testing.

Arrange prompt medical advice if diphtheria is possible, and tell the service before you arrive so precautions can be arranged. Do not scrape a throat coating or start leftover medicine. Clinicians may begin treatment before all laboratory information returns when the pattern and exposure make diphtheria a concern. Antibiotic Treatment explains the role of prescribed treatment. Review vaccination status through Childhood Immunisation.

Seek emergency help for difficulty breathing, noisy breathing, inability to swallow saliva, drooling, rapidly expanding neck swelling, fainting, or severe weakness. Arrange same-day assessment for a worsening sore throat with fever, hoarseness, or a thick throat coating, especially after close contact or when vaccination is incomplete. Do not wait for a home test.

Ask which diagnoses are being considered, whether a throat sample is needed, when results may guide treatment, and whether you should isolate. Ask what symptoms should trigger emergency help while you wait.