Avaliação da sensibilidade in vitro de bactérias isoladas de infecções do conduto auditivo de cães atendidos no HV-UFCG-Patos/PB frente ao óleo-resina de copaíba (Copaifera langsdorffii).

Abstract

External otitis is an acute or chronic inflammatory disease that affects the outer ear of dogs and cats, causing inflammation, erythematous plaque, discomfort, head agitation, pain, secretion, unpleasant odor and moist dermatites, representing up to 20% of dogs and 7% of cats in the clinical routine. The main bacterias isolated are Staphylococcus intermedius, Pseudomona aeruginosa, Proteus spp., Streptococcus spp, Escherichia coli and Corynebacterium spp. Copaiba oil is a clear liquid obtained through the Copaiba tree and has several uses in popular medicine, some of which have already been proven in several studies. Considering the abundance of resistance of the microorganisms to the different antimicrobials, it is necessary the constant search for new therapies. Copaiba oil was tested against 16 bacterial samples isolated from animals with external otitis, including Staphylococcus spp., Pseudomonas aeruginosa, Escherichia coli and Enterobacter., using the Minimum Inhibitory Concentration (MIC) in Macrodilution in tubes. For the Staphylococcus spp. bacteria, the oil showed efficacy between 10% to 0.3% concentrations in 90% of the strains tested. For the other bacterias, Gram negative, oil showed no efficacy in any of the samples tested. Concluding that the oil shows efficacy against the Gram positive bacteria tested, but ineffective for the Gram negative, requiring further in vivo studies, in order to obtain products as support tools for treatments of infections in animals.