The present work was conducted to investigate the drug susceptibility of microorganisms isolated from canine external ear canals. Antifungal susceptibility test of M pachydermatis (17 strains) was perfomed by agar dilution method, using 11 antifungal drugs including amphotericin B(A), nystatin(N), pimaricin(P), griseofulvin(G), bifonazole(B), clotrimazole(C), miconazole(M), econazole(E), ketoconazole(K), tolnaftate(T), 5-fluorocytosine(F). All isolates were highly sensitive to K, M, T(geometric mean MIC ; GM MIC≤0.16㎍/㎖) but they weren´t sensitive to P, F and G(GM MIC≥92.37㎍/㎖∼≥128㎍/㎖).
Antibacterial susceptibility test against 119 isolates of bacteria was performed by agar dilution method, using 9 antibacterial drugs including erythromycin(ET), chloramphenicol(CP), gentamycin(G), vancomycin(V), ampicillin(AP), amoxacillin(AX), chlortetracycline(CT), ciprofloxacin(CF), enrofloxacin(EF). All isolates of Staphylococcus spp(101 strains) were highly sensitive to EF, CF, G (GM MIC 0.33∼1.47㎍/㎖). In other gram positive cocci(4 strains), they were highly sensitive to EF, CF, V(GM MIC 1∼4.76㎍/㎖) and CT(GM MIC 1 UFL unit/㎖). In gram positive rods(13 strains), they were highly sensitive to EF, CF, G(GM MIC ≤0.19∼1㎍/㎖). In Pseudomonas aeruginosa(1 strain), it was highly sensitive to AX, EF, ET, CF(GM MIC 0.06∼1㎍/㎖) and CT (GM MIC 1 UFL unit/㎖). All isolates weren´t sensitive to AP(GM MIC 16∼$gt;32㎍/㎖).
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