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What is diphtheria?

Diphtheria is an acute bacterial disease that can infect the body in the tonsils, nose, or throat (respiratory diphtheria) and/or the skin (skin or cutaneous diphtheria). A common childhood disease in the 1930s, a vaccine against diphtheria has made it very rare in the US and other developing countries.

How is diphtheria transmitted?

The diphtheria bacterium can enter the body through the nose and mouth. However, it can also enter through a break in the skin. It is transmitted from person to person by respiratory secretions or by breathing in droplets that contain diphtheria bacteria from an infected person when he/she is coughing, sneezing, or laughing. After being exposed to the bacterium, it usually takes 2 to 4 days for symptoms to develop.

What are the symptoms of diphtheria?

The following are the most common symptoms of diphtheria. However, each individual may experience symptoms differently. Symptoms may include:

  • Respiratory diphtheria. When a person is infected with diphtheria, the bacterium usually multiplies in the throat, leading to the respiratory version of diphtheria. A membrane may form over the throat and tonsils, causing a sore throat. Other common symptoms of respiratory diphtheria may include:

    • Breathing difficulty

    • Husky voice

    • Enlarged lymph glands

    • Increased heart rate

    • Stridor (a shrill breathing sound heard on inspiration)

    • Nasal drainage

    • Swelling of the palate (roof of the mouth)

    • Sore throat

    • Low-grade fever

    • Malaise

    Persons may die from asphyxiation when the membrane obstructs breathing. Other complications of respiratory diphtheria are caused by the diphtheria toxin released in the blood, leading to heart failure.

  • Skin (cutaneous) diphtheria. With this type of diphtheria, the symptoms are usually milder and may include yellow spots or sores (similar to impetigo) on the skin.

The symptoms of diphtheria may resemble other medical conditions. Always consult your physician for a diagnosis.

What is the treatment for diphtheria?

Specific treatment for diphtheria will be determined by your physician based on:

  • Your overall health and medical history

  • Extent of the condition

  • Your tolerance for specific medications, procedures, or therapies

  • Expectations for the course of the condition

  • Your opinion or preference

Penicillin is usually effective in treating respiratory diphtheria before it releases toxins in the blood. An antitoxin can be given in combination with the penicillin if diphtheria is suspected. Sometimes a tracheostomy (a breathing tube surgically inserted in the windpipe) is necessary if the patient has severe breathing difficulties.

How is diphtheria be prevented?

In their first year of life, children in the US are routinely given a triple vaccine that includes diphtheria. Because diphtheria still prevails in underdeveloped countries, the vaccine remains necessary in case of exposure to a carrier (a person with diphtheria) who is visiting from another country.

The CDC recommends that children need five DTaP shots. A DTaP shot is a combination vaccine that protects against three diseases: diphtheria, tetanus, and pertussis. The first three shots are given at 2, 4, and 6 months of age. Between 15 and 18 months of age, the fourth shot is given, and a fifth shot when a child enters school at 4 to 6 years of age. At regular checkups for 11- or 12-year-olds, a preteen should get a dose of Tdap. The Tdap booster contains tetanus, diphtheria, and pertussis. If an adult did not get a Tdap as a preteen or teen, then he or she should get a dose of Tdap instead of the Td booster. Adults should get a Td booster every 10 years, but it can be given before the 10-year mark. Always consult your physician for advice.

Online Resources

Centers for Disease Control and Prevention  http://www.cdc.gov/vaccines/pubs/vis/downloads/vis-dtap.pdf
Centers for Disease Control and Prevention  http://www.cdc.gov/vaccines/vpd-vac/diphtheria/in-short-both.htm
National Foundation for Infectious Diseases  http://www.nfid.org/pdf/factsheets/diphtadult.pdf
NIH Medline Plus  http://www.nlm.nih.gov/medlineplus/diphtheria.html

© 2000-2011 Krames StayWell, 780 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.