Which statement is accurate about infection origin?

Which statement is accurate about infection origin?

• A. Endogenous infections originate from within the host's body, while exogenous infections originate from outside sources.
• B. Endogenous infections originate from outside the host's body.
• C. Endogenous infections originate from vaccines.
• D. Endogenous infections originate from dietary sources.

Answer: (B)

Endogenous infections originate from inside the host’s own body. The invading organism comes from the person’s normal flora or from a latent infection that becomes active, often when immunity is weakened. Exogenous infections, in contrast, arise from external sources such as contaminated equipment, the environment, or other people. So the accurate statement is that endogenous infections originate from within the host’s body, while exogenous infections originate from outside sources. Concepts saying infections come from vaccines or dietary sources do not describe the typical endogenous/exogenous distinction.

Endogenous infections originate from inside the host’s own body. The invading organism comes from the person’s normal flora or from a latent infection that becomes active, often when immunity is weakened. Exogenous infections, in contrast, arise from external sources such as contaminated equipment, the environment, or other people. So the accurate statement is that endogenous infections originate from within the host’s body, while exogenous infections originate from outside sources. Concepts saying infections come from vaccines or dietary sources do not describe the typical endogenous/exogenous distinction.