Lung tumour incidence in mice treated with hydrazine sulphate.

Lung tumour incidence in mice fed with hydrazine sulphate (1.1 mg/day/mouse) was studied in male and female mice of Swiss, Strong "A" and F1 cross of ICRC (female) X C3H (Jax) (male), as well as in C17 males. Swiss strain mice showed 100% lung adenocarcinomas. None of the treated mice of different strains had liver tumours. Hydrazine sulphate also induced adenocarcinomas of lung in Strong "A" and F1 cross of ICRC females X C3H (Jax) males but it produced lymphomas of lung in C17 strain. Female mice of Swiss strain and F1 hybrids showed greater susceptibility to hydrazine sulphate than the males. It was interesting to observe that protein and vitamin B deficiency in the diet shortened the tumour induction period in Swiss strain mice.