Opportunistic infections (OIs) are infections that occur more often or are more severe in people with weakened immune systems than in people with healthy immune systems.
People with weakened immune systems include people living with HIV.
OIs are caused by a variety of germs (viruses, bacteria, fungi, and parasites).
What is the most common opportunistic infection in people living with human immunodeficiency virus?
Some of the most common OIs in people living with HIV in the U.S. are: Herpes simplex virus 1 (HSV-1) infection—a viral infection that can cause sores on the lips and mouth. Salmonella infection—a bacterial infection that affects the intestines.
What is an opportunistic disease?
An opportunistic infection is an infection caused by pathogens (bacteria, viruses, fungi, or protozoa) that take advantage of an opportunity not normally available, such as a host with a weakened immune system, an altered microbiota (such as a disrupted gut microbiota), or breached integumentary barriers.
What is an example of an opportunistic pathogen?
Opportunistic Pathogens. Mostly these pathogens do not cause disease in a healthy individual that has a normal immune system but in immunocompromised patients. Examples include malnutrition, ageing, leukopenia, HIV, immunosuppressing agents and genetic predisposition.
What is an opportunistic organism?
Opportunistic microorganisms are typically non-pathogenic microorganisms that act as a pathogen in certain circumstances. They lay dormant for long periods of time until the host ‘s immune system is suppressed and then they take that opportunity to attack.