Final answer:
Doctors must determine the bacterial load in Pseudomonas infections to assess the severity and guide treatment intensity.
Step-by-step explanation:
It is important for doctors to determine the bacterial load before treating an infected patient with a Pseudomonas infection to estimate the severity of the infection. Knowing the bacterial load can help in understanding the progression of the infection and how aggressively it needs to be treated. It is not directly related to identifying the strain of Pseudomonas, measuring the patient’s immune response, or determining the source of the infection, even though those are also important considerations in managing an infection.