Twenty-one plants were identified through preliminary field surveys and seven were selected for
in vitro anti-helminthic activity against
Ascaris suum
. Of the seven plants that were initially screened, five gave appreciable positive results while two did not. The ED
50s obtained were: 1.62mg/ml (
Tetradenia riparia
), 4.13mg/ml (
Cassia occidentalis
), 12.50 mg/ml (
Carica papaya
) and 16.75mg/ml (
Momordica foetida). The research findings showed that
Tetradenia riparia
,
Cassia occidentalis
,
Carica papaya
,
Momordica foetida
and
Erythrina abysinnica
may be of value in the treatment of helminthiasis; whereas
Moringa oleifera
and
Cannabis sativa
are probably ineffective or of limited value for the same purpose.