A subacute toxicity study of a potent tetanus toxoid (250 Lf) was carried out in guinea pigs.The toxoid was injected subcutaneously at the nape of the neck at d
Sprague-Dawley male rats were divided into groups and maintained on a semipurified diet containing either 5 or 40 ppm of zinc or 2 or 8 ppm of copper. Half of t