TABLE 1.

Advantages and disadvantages of the three methods for obtaining urine specimens from infants

	Suprapubic aspiration	Urethral catheterization	Perineal bag specimen
Advantages	Most accurate	Very accurate	Simple, noninvasive
Disadvantages	Invasive, technical expertise needed, variable yield	Invasive, risk of urethral trauma	High contamination rates, unnecessary investigations and high overall cost