ABSTRACT
El propóleos es una resina colectada por las abejas Apis mellifera de especies botánicas, próximas a los apiarios. Este material resinoso es ampliamente reconocido por sus propiedades antimicrobianas. El objetivo de este trabajo fue evaluar la actividad antifúngica in vitro de los extractos etanólicos de propóleos (EEP), obtenidos a partir de muestras provenientes de apiarios experimentales de investigación, ubicados en la región del Bajo Cauca antioqueño, sobre dos hongos filamentosos, Botryodiplodia theobromae y Fusarium oxysporum y un hongo levaduriforme, Candida albicans El propóleos fue recolectado por los métodos de malla y de raspado, durante diferentes periodos del año. Mediante la técnica de macrodilución en caldo, se evaluaron seis dosis de EEP, en un rango de156 a 5000µgmL-1 y se determinó la concentración que inhibió el 80 y el 50% del crecimiento del hongo. Los resultados indican que el método de recolección del propóleos presentó diferencias significativas con respecto al crecimiento de C albicans y no para B theobromae y F oxysporum Las CMI80 estuvieron entre 1211 a 4050µgmL-1, 1567 a 5016µgmL-1 y 1529 a 3568µgmL-1 para B theobromae, F oxysporum y C albicans, respectivamente. En conclusión, los extractos evaluados exhibieron un actividad inhibitoria del crecimiento moderada, en comparación con el control y el hongo levaduriforme, C albicans presentó la mayor sensibilidad frente a los EEP analizados. Adicionalmente, el método de recolección del propóleos solo presentó diferencias significativas respecto a la concentración mínima inhibitoria, encontrada para C albicans.
Propolis is a resin collected by the Apis mellifera bees from botanical species surrounding the apiaries. This resinous material is widely renowned by its antimicrobial properties. The aim of this research was to evaluate the in vitro activity of ethanolic extracts from propolis (EEP), obtained from experimental research apiaries located in the Bajo Cauca antioqueño region, against two filamentous fungi, Botryodiplodia theobromae and Fusarium oxysporum, and a yeast, Candida albicans. Propolis were collected in different periods of the year, by methods of scraping and mesh. Using the macrodilution technique, six doses of EEP ranging from 156 to 5000µgmL-1 were evaluated and minimal inhibitory concentration 80 and inhibitory concentration 50 were determined. Results indicated that the harvest method showed a significant effect on C albicans growth, but not for B theobromae and F oxysporum. The MICs80 observed were between 1211 to 4050µgmL-1, 1567 to 5016µgmL-1 and 1529 to 3568µgmL-1 for B theobromae, F oxysporum and C albicans, respectively. In conclusion, the extracts tested showed a moderate inhibitory growth activity, in comparison with the control; the yeast, C albicans, showed the highestsensibility to the EEP evaluated. Additionally, the collection methods only showed significant differences with respect to minimal inhibitory concentration found for C albicans.
ABSTRACT
A total of 46 isolates of Fusarium were isolated from six forest soil samples in Muka Head, Teluk Bahang, Pulau Pinang. Two Fusarium species were identified from the soil samples namely, F. solani (93.5%) and F. oxysporum (6.5%). The present study showed that the diversity and occurrences of Fusarium species in forest soil was low compared to cultivated soils.
ABSTRACT
With the wide and extensive use of immunosuppressive agents and broad-spectrum antibiotics, opportunistic fungla infections have been increased. Fusarium spp. are known to be significant emerging pathogens of opporthunistic local infection. But very rarely it may cause fatalc systemic infection. A 4-year-old boy with acute lymphocytic leukemia develped asymptomatic disseminated purpura with high fever unresponsive to the antibiotics during chemotherapy. The skin lesions gradually increased in size and number, and prgreassed to forming central necrosis. Many septated hyphae and variable sized spore-like fungal elements are found in the epidrmis, dermis and subcuit on histologic sections. The pathogenic fungus was idenified as Fusarium oxysporum by culture and scanning electronic microscopic findings.