Atividade antibacteriana e antifúngica, in vitro e in situ, do extrato etanólico de própolis verde, frente a micro-organismos presentes em bebedouros avícolas

摘要

The use of natural products for medicinal purposes for treatment, cure and prevention of diseases is one of the most antique forms of medical practice of humanity. Propolis is a natural resinous substance produced by honeybees from exudates collected of different parts of the plant and has been used as a therapeutic compound since antiquity in the popular medicine both human and veterinary due to its therapeutics properties. The antimicrobial activity is mentioned in various studies applying different genus of viruses, fungus, bacterias and parasites as a experimental model. An ethanolic extract from green propolis was evaluated as to the sanitizer capacity in situ over drinking fountains used for broilers in comparison with a commercial disinfectant based on quaternary ammonia. The extract was also evaluated in vitro against bacterias isolated from the drinking fountains used in the experiment. At 28 days of broiler age when the microbial challenge was greater the action of the extract as a disinfectant was similar to the action of the commercial disinfectant based on quaternary ammonium. In the same age of the birds both the propolis extract as well as the commercial disinfectant the fungal growth was completely inhibited in the drinking fountains. The extract presented action in vitro against gram positive bacteria Staphylococcus sp. negative coagulase, S. aureus, Corynebacterium sp. isolated from swabs collected from the drinking fountains and also the gram negative bacteria Escherichia coli.