Antifungal activity of bacterial strains from the rhizosphere of Stachytarpheta crassifolia

This study evaluated the antifungal action of biomolecules produced from the secondary metabolism of bacterial strains found in the rhizosphere of semi arid plants against human pathogenic Candida albicans. Crude extracts were obtained using ethyl acetate as an organic solvent and the bioactivity was assessed with a bioautography technique. The results showed that bacterial strains, Alcaligenes faecalis MRbS12 and Bacillus cereus MRbS26, had compounds with antifungal bioactivity. The largest inhibition zones for both compounds were located on spots with Rf values below 0.500, indicating that the molecules possibly had polar characteristics. These results suggested that microorganisms found in the environment could have bioprospecting potential.Key words: Biomolecules, bioautoghaphy, antifungal activity, Alcaligenes faecalis, Bacillus cereus, Candida albicans

Indiens du Mozambique et d'Afrique orientale

Lusotopie é uma revista comparatista internacional cujo objectivo é o desenvolvimento da investigação política sobre os espaços contemporâneos provenientes da história e da colonização portuguesas. Propõe-se abordar os problemas gerais da análise política (nacionalismo, etnicidade, neoliberalismo, reforma do Estado, federalismo, relações de género, guerras civis, media, eleições, etc.) : a originalidade da revista é a de tratar aqueles problemas no seio do espaço pós-colonial e plural, presente em quatro continentes e em numerosas diásporas. Sa indo desde 1994 Lusotopie publicou trabalhos de autores de mais de trinta nacionalidades, muitos dos quais naturais de países do Sul, e instituiu um espaço de diálogo egalitário graça s ao uso sistemático de três línguas internacionais (francês, inglês e português). Lusotopie is an international comparatist journal devoted to political analysis of contemporary spaces stemming from Portuguese history and colonization. It deals with general issues in political analysis (nationalism, ethnicity, neo-liberalism, State reform, federalism, gender, civil war, media, civil society, election, etc.): it provides an original approach within this heterogeneous postcolonial space on the four continents and in numerous Diasporas. Founded in 1994, Lusotopie has published a wide range of contributions from researchers of over 30 different nationalities, often from Southern countries. It has brought up an egalitarian dialogue space thanks to use of three international languages (French, Portuguese and English). Lusotopie est une revue comparatiste internationale, dont le but est le développement de la recherche politique sur les espaces contemporains issus de l’histoire et de la colonisation portugaises. Elle entend poser tous les problèmes généraux de l’analyse politique (nationalisme, ethnicité, néolibéralisme, réforme de l’État, fédéralisme, relations de genre, guerres civiles, médias, société civile, élections, etc.) : son originalité est de les “traiter” au sein de cet espace postcolonial et composite, présent sur quatre continents et dans de nombreuses diasporas. Paraissant depuis 1994, Lusotopie a publié des travaux d’auteurs de plus de trente nationalités, souvent originaires de pays du Sud et institué un espace de dialogue égalitaire grâce à son usage systématique de trois langues internationales (français, portugais et anglais)