Medicine
Pathophysiology of Infection
Quick fact
Infections begin with pathogens invading host cells and multiplying to cause damage.
Why this is interesting
Did you know that a single bacteria can multiply into billions in just hours? This is the start of an infection, but how does it take over your body?
Read the full explanation
Understanding Pathophysiology of Infection
When a pathogen enters the body, it starts by attaching to and penetrating host cells. Once inside, it begins replicating itself, using the cell's resources. This causes the cell to malfunction or die, which can lead to tissue damage and symptoms like fever or inflammation. The immune system tries to fight back, but sometimes the infection spreads or becomes severe.
A deeper explanation
The pathophysiology of infection involves a complex interaction between the host and the invading pathogen. Pathogens enter through portals such as the respiratory tract, skin, or bloodstream, then multiply within host cells. This leads to cellular damage, inflammation, and immune activation. The body's response can be effective in clearing the infection, but sometimes it results in chronic disease or systemic complications like sepsis.