Whooping Cough (Pertussis)

Whooping cough (pertussis) is named for the persistent cough that can last up to 100 days, and is known as an acute respiratory infectious disease caused by the bacterium Bordetella pertussis. It primarily affects infants and young children and is characterized by severe coughing fits. In recent years, incidence rates among adults have also been increasing, making it a condition that requires attention.

1. Key Points

The most prominent feature of whooping cough is its severe, paroxysmal cough. A characteristic symptom is the distinctive "whoop" sound made when breathing in after a coughing fit, produced as air is rapidly inhaled following a bout of coughing. In infants and young children, these symptoms can be especially severe. Early symptoms are very similar to those of a common cold. Runny nose, sneezing, and low-grade fever appear, and this stage typically lasts about one to two weeks. It is also noted that whooping cough is difficult to suspect at this stage, which often leads to delayed diagnosis. However, this period is also when the disease is most contagious. When the paroxysmal stage begins, severe coughing starts. Coughing fits can occur more than 10 times in succession, and vomiting may accompany the cough.

2. Detailed Description

In severe cases, the face may turn red or cyanosis may appear, and particularly in infants, apnea (cessation of breathing) can occur, posing a life-threatening risk. In adults, symptoms are known to be relatively mild. They often present simply as a persistent cough, making it easy to mistake for a common cold or bronchitis. However, these adult patients can transmit the disease to infants and young children, so caution is necessary. Whooping cough is known to spread through droplet transmission. It is transmitted through droplets expelled when an infected person coughs or sneezes, making the risk of infection high among close contacts. The incubation period is typically about 7 to 10 days, and the disease is contagious even before symptoms appear.

3. How to Apply

In South Korea, the DTaP vaccine is provided free of charge through the National Immunization Program, with vaccination starting at 2 months of age. It is important to complete a total of 5 doses, and booster vaccinations are also recommended for adults. Treatment involves the use of antibiotics. Starting antibiotic treatment in the early stage can reduce the severity of symptoms and decrease contagiousness. Macrolide antibiotics are commonly used, and a 14-day course is the standard treatment. Infants and young children with whooping cough may require hospitalization. Infants under 6 months of age are at high risk of complications and require intensive monitoring and treatment. In cases of severe vomiting from coughing, intravenous fluid therapy may also be administered to prevent dehydration.

4. Additional Information

Pneumonia is known to be the most common complication of whooping cough. Pneumonia caused by secondary bacterial infection can occur, and in severe cases, this can lead to respiratory failure. Persistent coughing can also cause rib fractures or hernias. Neurological complications can also occur. Encephalopathy or seizures may develop, and in rare cases, permanent brain damage can result. This occurs primarily in infants and young children and is one of the main reasons whooping cough is classified as a dangerous disease. Pregnant women require special caution. If whooping cough is contracted during pregnancy, there is a risk of transmission to the fetus, and if a newborn is infected after birth, it can be life-threatening. Therefore, vaccination against whooping cough between 27 and 36 weeks of pregnancy is recommended.

5. In-Depth Information

If a family member develops whooping cough, prophylactic antibiotic treatment should be considered for all close contacts. This is especially important when infants, young children, or pregnant women are present. Additionally, patients should be isolated for up to 5 days after starting antibiotic treatment. Healthy adults are also advised to receive a booster whooping cough vaccination every 10 years, as the effectiveness of the vaccine diminishes over time. In particular, those who frequently come into contact with infants and young children, as well as healthcare workers, are strongly encouraged to get vaccinated. Recently, the incidence of whooping cough appears to be on the rise. This is understood to be the result of multiple factors acting in combination, such as declining vaccination rates and decreasing vaccine effectiveness. Therefore, it is important to adhere to the vaccination schedule.

6. Notes

Diagnosis is primarily made through PCR testing or culture tests. In the early stages, nasopharyngeal secretions are collected for testing, and antibody tests can also aid in diagnosis. However, diagnosis can become more difficult as time passes after symptom onset. During home treatment, adequate rest and fluid intake are important. It is helpful to avoid irritants that may trigger coughing and to use a humidifier to maintain appropriate indoor humidity. Eating small, frequent meals is also known to be effective in preventing vomiting. In group settings such as schools or daycare centers, a swift response is required when a case of whooping cough is identified. Contact tracing and preventive measures must be implemented immediately, and temporary closure should also be considered if necessary.

7. 7th Information

Full recovery from whooping cough can take several months. Even after the acute symptoms improve, a mild cough may persist for several weeks, and symptoms that seem to recur may also appear during this period. Personal hygiene management is also important for prevention. Practicing regular handwashing and observing proper cough etiquette are necessary. When coughing or sneezing, the inside of the elbow or a tissue should be used to cover the mouth and nose, and used tissues should be discarded immediately. Caution is also required when traveling abroad. If you plan to visit an area where whooping cough is prevalent, you should check your vaccination status before travel and receive a booster if necessary. This is especially important when traveling with infants and young children.

8. 8th Information

Communication with healthcare providers is also important. If a persistent cough continues for more than 2 weeks, or if the nature of the cough is unusual, it is essential to see a doctor. Early diagnosis and treatment are key to preventing complications and stopping the spread of the disease. Whooping cough is a preventable disease. It can be sufficiently prevented simply by getting vaccinated and following basic hygiene practices. If we all recognize the dangers of whooping cough and actively participate in prevention, we can keep our children safe from this disease. Health management is much like long-term investing. Just as ETF investors manage risk through consistent, diversified investing, our health must also be continuously managed through vaccination and healthy habits. Whooping cough vaccination is the most reliable way to protect the portfolio of our health.