| antimicrobial, antitumor and antileishmania screening of medicinal plants from guinea-bissau. | following an ethnobotanical search carried out in guinea-bissau, eighteen extracts derived from sixteen medicinal species were screened for antimicrobial, antitumor and antileishmania activity. significant antitumor activity was found for holarrhena floribunda against kb (squamous carcinoma), sk-mel 28 (melanoma), a 549 (lung carcinoma) and mda-mb 231 (mamma carcinoma) cell lines, with corresponding ic50 values of 7.9, 9.0, 3.4 and 9.9 micrograms/ml. khaya senegalensis and anthostema senegalense ... | 1999 | 10439484 |