The effect of feeding rats with varying doses of benomyl, methyl-1-(bu
tyl carbamoyl)-2-benzimidazole carbamate, for seven days on the enlarg
ement of the liver, kidney and spleen and the functional capacity of w
eanling albino rats was studied. The doses fed in rat chow were 0, 40,
80, 125, 165, 200, 240, 280, 320, 360, 400, 440, 480, 520, 560, and 6
00mg/kg body weight. The results showed that all the rat organs were e
nlarged to different degrees. The liver shaved the highest enlargement
and the spleen the least. These enlargements were dose dependent and
positively correlated with the amount of the fungicide administered to
the rats. The serum enzymes, SGOT, SGPT and BUN increased significant
ly while the SALP showed only a slight increase above the control valu
es. Benomyl, a membrane pertubent caused morphological damage to the r
at organs, especially the liver resulting in necroticised cells, oedem
a and enlargement and the resultant increase in some serum enzymes.