الفعالية التثبيطية لمستخلصات الثمار و الجذور لنبات الكراوية Carum carvi L. في نوعين من البكتيريا الممرضة للإنسان

الملخص EN

The purpose of the present study is to assay the effect of four concentrations 50, 100, 200, 400 mg.ml-1 of the aqueous extract and the extracts of methyl and ethyl alcohol of the fruits and roots of the plant Carum carvi L.

and three concentrations are 25, 50, 100 % of the fruits of the volatile oil In vitro through the two types of the experimental bacteria, first gram negative (Gr-ve) which is Escherichia coli, and the other is gram positive (Gr+ve) Staphylococcus aureus by using filter paper disc diffusion method.

The results showed that the effectiveness of plant extracts toward both qualitative growth of bacteria under study had varied depending on the type of partial and the type of extract and its concentration.

The ethanol extract of the roots of concentration 200gm.ml-1 showed only inhibition of the growth of bacteria E.coli.

The diameter of inhibition reached to 16 mm, while the rest of the extracts did not effect the growth of the bacteria itself.

While the staph.

aureus bacteria was more influenced by vegetable extracts under study methanol extract of the roots of concentration 200 mg.ml-1 showed incorporeal distinction in the inhibition of its growth in diameter of inhibition 25 mm which was not significantly different from the methanol extract of the roots of the concentration 400 mg.ml-1 which gave diameter of inhibition reached 24 mm.Volatile oil of the fruits of Carum carvi L.

in concentration of 100 % only inhibition the growth of E.coli bacteria and the diameter of inhibition reached 20mm, other concentration did not effect the growth of the bacteria itself staph.

aureus bacteria showed resistant to all oil concentrations under study.