作者对26个結核患兒的吡多醇缺乏的发病情况进行研究。其中20个接受不同时期的異烟脛治疗,吡多醇缺乏的临床症状如抽搐、貧血或体重减低皆未見到。作者用变色氨酸为N~1——甲烟醯胺的能力作为吡多醇缺乏之生化試驗。除一例外,其他病人在給色氨酸后皆显示尿中N~1——甲烟醯胺排泄之增加,証 The authors studied the incidence of pyrethroid deficiency in 26 tuberculosis children. Twenty of these were treated with different lengths of shin, and no clinical symptoms such as convulsions, anemia, or weight loss were seen with the absence of pyridoxine. The author uses the ability of the tryptophan to be N ~ 1-methylarsylamine as a biochemical test for the lack of pyridine. Except for one case, all other patients showed increased urinary excretion of N-1-methylselenol after giving tryptophan