A 6-month-old previously healthy boy is brought to you for fever (38.5-39.5°C) of three
days. Physical examination on him does not reveal any apparent signs of infection. (15%)
【題組】⑶ His urinalysis reveals numerous white cell count and urine culture grows single pathogen
with colonies >100,000/ml. What further tests will be most useful in further determining
the cause and severity of urinary tract infection?