Ecological and Phytochemical Studies on Euphorbia retusa (Forssk.) from Egyptian Habitat

Table 6

Antimicrobial activities of Euphorbia retusa extract and pure compounds (1–4) in the agar diffusion test (mm diameter).

Ext./compound	Conc. (mg/mL)	EC^a	BS^b	Psa^c	Ml^d	Stw^e
Euphorbia retusa extract	40.0	7	—	—	—	8
1	1.0	—	—	—	—	—
2	1.0	—	—	—	—	—
3	1.0	—	—	—	—	—
4	1.0	—	—	—	—	—
Gentamicin	0.5	24	24	25	24	19

^aE. coli DSMZ 1058; ^bBacillus subtilis DSMZ 704; ^cPseudomonas agarici DSMZ 11810; ^dMicrococcus luteus DSMZ 1605; ^eStaphylococcus warneri DSMZ 20036; (—) = no activity.