Invasive bacterial infections occur when the bacteria get past the defenses of the person who is infected. This may occur when a person has sores or other breaks in the skin that allow the bacteria to get into the tissue, or when the person’s ability to fight off the infection is decreased because of chronic illness or an illness that affects the immune system.
Although healthy people can get invasive bacterial disease, people with chronic illnesses like cancer, diabetes, and chronic heart or lung disease, and those who use medications such as steroids have a higher risk. Persons with skin lesions (such as cuts, chicken pox, surgical wounds), the elderly, and adults with a history of alcohol abuse or injection drug use also have a higher risk for disease.
Some invasive bacteria include:
Group A Streptococcus
Group B Streptococcus
Haemophilus influenzae
Neisseria meningitides
Streptococcus pneumoniae
Methicillin-resistant Staphylococcus aureus (MRSA)
