Question

which of the following statements about biological transmission is false?
the pathogen may require the vector as a host
the pathogen may be injected by the bite of the vector
houseflies are an important vector
the pathogen may enter the host in the vectors feces
the pathogen reproduces in the vector
question 2 (1 point)
a healthcare - associated infection (traditionally known as a nosocomial infection) is
always present, but is inapparent at the time of hospitilization
always caused by pathogenic bacteria
always caused by medical personnel
only a result of surgery
acquired during the course of hospitalization

Explanation:

• Question 1: Houseflies are mechanical vectors (carry pathogens on their bodies) rather than important biological vectors (where pathogen requires vector as host, reproduces in vector, etc.).
• Question 2: Healthcare - associated infections are defined as those acquired during the course of hospitalization. They are not always present at admission (that would be a pre - existing infection), not always caused by bacteria (can be viruses, fungi etc.), not always due to medical personnel (can be from hospital environment), and not only from surgery (can occur in non - surgical patients too).

Answer:

• Question 1: Houseflies are an important vector
• Question 2: acquired during the course of hospitalization