The types of tests that are needed for diphtheria include:
- Throat culture: A swab is taken from any visible throat sores and the sample is put onto a culture to see if the diphtheria bacteria is present.
- Gram stain: This test gives the bacteria a color so it can be seen under a microscope, although it cannot confirm diphtheria.
- Toxin detection: These tests are used to confirm whether the bacteria is producing toxins.
- Serology: Blood tests that help the doctor understand how the body is responding to the infection.
- Chest x-ray: This may be done if there are breathing problems or concerns about complications like pneumonia.
- Echocardiogram: This may be done if there is suspicion that the infection has affected the heart.
- Total white blood cell count: This test can indicate if the body is fighting off an infection.
- Troponin assessment: This test can give a clue about the severity of the infection and any potential heart damage.