Answer to Question 1
ANS: C
Urinary stasis is the single most important host factor that influences the development of UTIs. Urine is usually sterile but at body temperature provides an excellent growth medium for bacteria. Poor hygiene can be a contributing cause, especially in females because their short urethras predispose them to UTIs. Urinary stasis then provides a growth medium for the bacteria. Intermittent constipation contributes to urinary stasis. A full rectum displaces the bladder and posterior urethra in the fixed and limited space of the bony pelvis, causing obstruction, incomplete micturition, and urinary stasis. Congenital anomalies can contribute to UTIs, but urinary stasis is the primary factor in many cases.
Answer to Question 2
ANS: C
Girls between the ages of 2 and 6 years are considered high risk for UTIs. This child is showing signs of a UTI, including incontinence in a toilet-trained child and possible urinary frequency or urgency. A physiologic cause should be ruled out before psychosocial factors are investigated. Glomerulonephritis usually manifests with decreased urinary output and fluid retention. ADHD can contribute to urinary incontinence because the child is distracted, but the first manifestation was incontinence, not distractibility.