Is impetigo contagious? And what are the ways to prevent its spread?

Yes, impetigo is a skin infection that spreads from one person to another, as the Staphylococcus aureus or Streptococcus bacteria causing it are contagious [1] [2]. This infection spreads primarily through direct contact with the open sores of an infected person or nasal secretions. The bacteria can also spread by touching contaminated personal items, such as towels, clothing, or tools that have come into contact with the infected skin [1] [2]. Because the bacteria need a break in the skin to enter, wounds, scratches, or insect bites act as entry points that make infection more likely to occur [1].

How does impetigo spread among individuals?

The infection occurs more easily in environments with close physical proximity or crowded conditions, such as daycare centers, schools, sports facilities, and camps [2]. Symptoms usually appear after an incubation period of approximately 10 days from the time of exposure to the bacteria [2]. It often begins as red sores or blisters surrounded by irritated skin, which fill with pus and then rupture to form a yellow or "honey-colored" crust [1] [2]. Because the sores are itchy, scratching them leads to contamination of the patient's fingers and spreads the bacteria to other parts of their body or to other people upon contact [1].

Measures to prevent the spread of infection

Careful hygiene practices are the primary means of reducing the spread of infection and protecting others around you:

• Regular hand washing: This is the most important measure, especially after touching sores or before and after caring for any wound [2].
• Covering sores: All open sores must be covered with clean bandages to prevent bacteria from reaching the surrounding environment or shared items [2].
• Avoiding the sharing of personal items: Towels, clothing, bed sheets, or children's toys should never be shared with an infected person during the period of contagion [2].
• Treating wounds immediately: Washing any wound, scratch, or insect bite immediately with soap and water significantly reduces the likelihood of the bacteria developing into an impetigo infection [3].

For more information about this condition, you can view our article on Impetigo: A Common Skin Infection in Children and its Prevention (Arabic).

When is it safe to return to school or work?

Infected individuals do not need to isolate completely for long periods. People with impetigo can return to school, work, or daycare as soon as treatment with antibiotics prescribed by a doctor has begun, provided that all sores are properly covered with bandages to prevent the transmission of bacteria [2]. Diagnosis is made through a clinical examination by a doctor, who will determine the appropriate antibiotic, whether it is a topical cream for limited cases or oral medication for more widespread cases [2]. It is essential to fully adhere to the prescribed duration of treatment, even if the sores begin to heal, to ensure the complete elimination of the bacteria and avoid any rare but serious complications that could affect the kidneys or heart [2].

Medical references

• Impetigo
• About Impetigo
• Ecthyma