Whooping cough (pertussis) is a serious, contagious, respiratory infection caused by the bacterium Bordetella pertussis. It is particularly serious in young children. One in every 200 babies who contract the infection will die. Immunisation is the best way to reduce the risk of whooping cough. Serious side effects or allergic reactions to the vaccine are rare.
Whooping cough (pertussis) is a serious, contagious, respiratory infection caused by the bacterium Bordetella pertussis. The disease begins like a cold and then the characteristic cough develops. This cough may last for months, even after antibiotic treatment is completed and the person is no longer infectious.
The 'whoop' (which is not always obvious) is due to a deep breath at the end of a bout of coughing. Vomiting after coughing is common.
Whooping cough is particularly dangerous for babies less than six months of age. They are affected more seriously by the disease than older children or adults and are more likely to develop complications.
One in every 200 babies who contract whooping cough will die. Immunisation is the best way to reduce the risk of whooping cough.
Symptoms of whooping cough
Whooping cough begins with symptoms similar to those of a cold. These can rapidly progress to include:
- severe cough – occurs in bouts
- characteristic 'whooping' sound on inhalation
- vomiting at the end of a bout of coughing
- apnoea – the child stops breathing for periods of time and may go blue.
Complications of whooping cough
Whooping cough is most serious in babies under 12 months of age. In young babies less than six months of age, the symptoms can be severe or life threatening. Seek urgent medical attention if your child's lips or skin go blue (cyanosis) or if they are having breathing difficulties associated with the coughing.
Some of the complications of whooping cough in young babies include:
- haemorrhage (bleeding)
- apnoea (stopping breathing for periods of time)
- inflammation of the brain
- convulsions (fits) and coma
- permanent brain damage
Causes of whooping cough
The Bordetella pertussis bacterium is spread by airborne droplets from the upper respiratory tract (when the infected person coughs or sneezes) and is highly infectious. The time from infection to appearance of symptoms (incubation period) is between six and 20 days.
A person is infectious for the first 21 days of their cough or until they have had five days of a 10-day course of antibiotics. In countries where immunisation rates are high, the risk of catching whooping cough is low.
In Victoria, most reports of whooping cough currently occur in adults over 20 years of age. Recent research has shown that parents and family members are the main source of whooping cough infection in babies.
Diagnosis of whooping cough
Whooping cough should be diagnosed and treated immediately. There are a number of tests for whooping cough, but they are not always reliable and the results may take some time. Treatment should not be withheld while waiting for these results.
Tests used to diagnose diphtheria may include:
- medical history including immunisation status
- physical examination
- blood tests
- swabs of the nose and throat for laboratory testing.
Treatment for whooping cough
In its early stages, the symptoms of whooping cough can be reduced by taking antibiotics. If treatement is given in the first 21 days of the illness, the risk of passing the infection to others might be reduced.
Members of the infected person's household are at increased risk of acquiring the disease and are usually prescribed a strong antibiotic as a preventative measure, even if they are fully immunised.
Immunisation against whooping cough
In Victoria, the whooping cough vaccine is available in a number of combined vaccines that also contain vaccines against other serious and potentially fatal diseases. The type of combined vaccine used for immunisation will depend on the person’s age group. Children need to follow the full schedule of vaccines to be fully protected.
Protection against whooping cough is available under the National Immunisation Program Schedule. In Victoria, immunisation against whooping is free of charge for:
- children at two, four and six months of age – in the form of a diphtheria, tetanus, whooping cough, hepatitis B, polio and Haemophilus influenzae type b (Hib) vaccine (six-in-one vaccine)
- children at four years of age – in the form of a diphtheria, tetanus, whooping cough and polio vaccine (four-in-one vaccine)
- students in year 10 of secondary school – a booster dose of diphtheria, tetanus and whooping cough vaccine (three-in-one vaccine)
- children up to and including nine years – catch-up immunisations are available for children who have not been fully vaccinated.
- Aboriginal and Torres Strait Islander people, refugees and asylum seekers ten years and over – catch-up immunisations are available for people who have not been fully vaccinated.
Childcare, healthcare workers and some adults should also be vaccinated, especially those who are, or will be, in close contact with babies. The whooping cough vaccine for adolescents and adults also contains diphtheria and tetanus protection in a combination vaccine. Immunity provided by the vaccine decreases after six to 10 years.
Pregnancy and whooping cough immunisation
Combination vaccines against diphtheria, tetanus and whooping cough are not recommended for pregnant women although they can be given in some circumstances. Immunisation against whooping cough is recommended as part of your pre-pregnancy planning or as soon as possible after the birth of your baby. Women who are breastfeeding can receive the combination vaccines. Speak with your doctor for more information.
Where to get help
- Your doctor
- In an emergency, always call triple zero (000)
- Emergency department of your nearest hospital
- Your local government immunisation service
- Maternal and Child Health Line (24 hours) Tel. 132 229
- NURSE-ON-CALL Tel. 1300 60 60 24 – for expert health information and advice (24 hours, 7 days)
- Immunisation Program, Department of Health, Victorian Government Tel. 1300 882 008
- National Immunisation Information Line Tel. 1800 671 811
- Your local pharmacist
Things to remember
- Whooping cough (pertussis) is a very contagious respiratory infection caused by the bacterium Bordetella pertussis.
- The major symptom of whooping cough is the characteristic cough, which is often followed by a 'whooping' sound on inhalation.
- One in every 200 babies who contract whooping cough will die.
- Immunisation is the best way to reduce the risk of whooping cough.
You might also be interested in:
- Coughing and wheezing in children.
- Immunisation - childhood.
- Immunisation - DTP, polio, hep B, and Hib.
- Immunisation - facts and misconceptions.
- Immunisation in secondary schools.
- Immunisation status certificates.
- Immunisations - catch-ups.
- Infections - bacterial and viral.
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Last reviewed: September 2013
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