Question

Which of the following microorganisms is the most common cause of urinary tract infections?

A. Bacteroides fragilis
B. Escherichia coli
C. Proteus vulgaris
D. Streptococcus pneumoniae

Answer 1

Escherichia coli (E. coli) is the most common cause of urinary tract infections.

Step-by-step explanation:

The most common cause of urinary tract infections (UTIs) is Escherichia coli (E. coli), a gram-negative bacterium.

E. coli is a normal part of the digestive tract microbiota, but it can cause infection when it enters the urethra, usually through fecal contamination.

Good hygiene practices can help reduce the risk of UTIs caused by E. coli.