Use of phosphorous organic compounds of general formula (I)
1
wherein B represents either an ether group of the formula (II)
2
or a keto group of the formula (III)
3
is a 5 or 6 membered cyclic compound,
and their use for preparing pharmaceutical compositions for the therapeutic and prophylactic treatment of infections in humans and animals due to viruses, bacteria, fungi, and parasites as well as their use as a fungicide, bactericide and herbicide in plants.