Diphtheria is a serious bacterial infection that mainly affects the respiratory tract and sometimes the skin. It is caused by a bacterium Corynebacterium diphtheriae, which produces a toxin with potentially fatal complications if not treated in time. This article will cover the identification, diagnosis, and treatment of diphtheria, as well as symptoms, prevention methods, and risk factors.

What is diphtheria?

Diphtheria is an infectious disease that causes inflammation in the throat or nose caused by bacteria Corynebacterium diphtheriae. This bacterium releases a toxin that can damage tissue and, if left untreated, can affect the heart, nerves, and other organs, causing life-threatening conditions. Diphtheria is especially dangerous for children, but adults are not immune either. Due to the introduction of vaccination, the prevalence of the disease has decreased, but it still exists in regions with low levels of immunization.

Risk factors

Risk factors that may increase susceptibility to diphtheria include:

• Age: children under 5 and adults over 60 are at higher risk
• The state of the immune system: immunosuppression increases the risk of infection
• Vaccination status: Unvaccinated or incompletely vaccinated individuals are particularly susceptible
• Living conditions: Densely populated and unsanitary areas contribute to the spread of infection

Diphtheria is transmitted by airborne droplets or direct contact, which makes it highly contagious. Vaccination, known as the diphtheria shot, is an effective protection against the disease and is recommended in childhood and periodically repeated in adults to maintain immunity.

Symptoms of diphtheria

The symptoms of diphtheria can be different and depend on the severity and location of the infection. In general, symptoms appear 2 to 5 days after infection.

Early Symptoms

Early symptoms of diphtheria are often non-specific and may resemble the common cold or flu. These include:

• Fever: increased body temperature, usually mild to moderate
• Fatigue: general weakness and fatigue, which may be due to exposure to the toxin
• Pain in the neck: Soreness and discomfort in the throat, which increases when swallowing
• Loss of appetite: nausea or aversion to eating
• Snot: watery or mucous runny nose, which may be associated with a respiratory infection

Late symptoms

If diphtheria is not treated in time, more specific and severe symptoms appear:

• Pseudomembrane formation: a thick, grayish membrane on the throat or tonsils that can block the airway and make breathing difficult
• Swollen lymph nodes: Neck lymph nodes may be swollen and painful
• Respiratory disorders: due to the obstruction in the throat, the patient may experience labored breathing and stridor
• Skin lesions: Sometimes diphtheria also causes skin sores that are painful and infected
• Nerve damage: In severe cases, the toxin can cause neuropathy, which affects motor functions and reflexes

Causes and spread of diphtheria

Diphtheria is caused by a bacterium Corynebacterium diphtheriae, which can survive in moist places, such as on the mucous membranes of the throat or in the skin. The infection is spread by airborne droplets produced when a sick person coughs or sneezes, as well as by direct contact with contaminated surfaces or infected persons. Diphtheria is especially common in densely populated or unsanitary areas where vaccination rates are low. Thanks to vaccination, the prevalence of the disease has decreased significantly in many countries, but it remains a problem in low immunization areas. Parents and unvaccinated children are most at risk. The risk also increases for travelers visiting regions where diphtheria is endemic.

Diagnostic methods

Diagnosis of diphtheria is critical to ensure prompt and effective treatment. It includes several approaches to help determine the infection and its severity.

• Laboratory tests: laboratory tests are essential in the diagnosis of diphtheria. A sample is usually taken from the patient's throat or nose for bacterial culture. The sample is inoculated into the growth medium and, if detected Corynebacterium diphtheriae presence, confirms the diagnosis of diphtheria. In addition, tests are carried out to determine the toxin production of the bacterium.
• Physical examination: physical examination is important to assess for symptoms and clinical signs that may suggest diphtheria. The doctor examines the patient's throat to detect the presence of pseudomembrane and observes swelling in the throat area, as well as enlarged lymph nodes. The test also includes an assessment of respiratory function to detect respiratory problems.
• Additional examinations: additional tests such as an electrocardiogram (ECG) and neurological tests may be necessary to evaluate cardiac and nervous system function, as diphtheria toxin can cause myocarditis and neuropathy. These tests help identify possible complications and determine the need for more intensive treatment.

Treatment options

Diphtheria treatment should be started immediately to reduce the risk of complications. Several approaches are used in the treatment process.

• Complementary therapies: additional therapies may be necessary to prevent complications and relieve symptoms. These include respiratory support for patients with severe respiratory distress and intensive care if cardiorespiratory problems occur. In some cases, surgical intervention may be required to remove obstructions in the throat. Patients may also require cardiovascular supportive therapy to reduce the risk of myocarditis.
• Long-term care: after the acute phase of diphtheria, patients may require prolonged rehabilitation, especially if there has been neuropathy or other types of complications. Physiotherapy and occupational therapy can help restore movement functions and improve quality of life.

Prevention and vaccination

Prevention is the most effective way to prevent the spread of diphtheria. Vaccination against diphtheria is the main preventive measure and includes the diphtheria shot, or DTP vaccine, which protects against diphtheria, tetanus and whooping cough. Vaccination usually begins in childhood and is followed by revaccination throughout life. Vaccination is very effective and significantly reduces the incidence of diphtheria. In addition to vaccination, it is important to observe hygiene norms, as well as to avoid contact with infected persons, especially when traveling to regions with a high risk of disease.

Immunization programs

Maintaining a high level of immunization in the community is important to control diphtheria. Health authorities often organize vaccination campaigns, especially in regions with low vaccination coverage. These programs include education about the importance of vaccination and its positive impact on public health.

Epidemiological surveillance

Epidemiological surveillance is essential for timely identification of diphtheria outbreaks and prevention of their spread. This includes surveillance of disease cases, data collection and analysis, and public awareness of potential risks and preventive measures.

Travel tips

Caution is important for travelers to regions where diphtheria is endemic. Before traveling, it is recommended to check your vaccination status and revaccinate if necessary. In addition, it is essential to observe hygiene norms, such as washing hands frequently and avoiding direct contact with people who have respiratory symptoms.

Public education

Education about diphtheria and its prevention is essential to reduce the risk of contracting the disease. Health organizations and educational institutions can promote awareness of diphtheria symptoms, modes of transmission and the importance of vaccination. Public awareness of this disease can help prevent panic and encourage timely medical assistance.

Conclusions