The nurse who removes an indwelling catheter is preventing infection by interrupting which link in the chain of infection?
A) Portal of entry
B) Infectious agent
C) Portal of exit
D) Reservoir
A) Portal of entry
Explanation: A) The means by which a pathogen enters the host is called the portal of entry. By removing the indwelling urinary catheter, the portal of entry of pathogens into the bladder has been removed.
B) Infectious agents cause disease and include bacteria, viruses, fungi, prions, protozoa, and helminths.
C) The portal of exit is how a pathogen exits a reservoir, such as by coughing or sneezing.
D) To transmit disease, a pathogen must leave its reservoir or host through a port of exit and must be conveyed by a mode of transmission to a susceptible host through a portal of entry.
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