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A total of 120 poultry carcasses (chicken, turkey and quail from conventional poultry farms, and chicken from organic farms; 30 samples in each group), collected from eight randomly selected retail outlets in North-Western Spain, was subjected to microbiological examination. Psychrotrophic counts ranged from 4.87 ± 0.83 log₁₀ cfu/cm² skin in quail to 6.01 ± 0.38 log₁₀ cfu/cm² skin in turkey. Higher (P < 0.05) faecal coliform load was found on conventionally produced chicken (2.95 ± 0.48 log₁₀ cfu/cm² skin) than in the other types of sample (from 1.71 ± 0.29 log₁₀ cfu/cm² skin in turkey to 2.19 ± 0.34 log₁₀ cfu/cm² skin in quail). All the samples harboured Escherichia coli. Sixty E. coli strains (15 from each type of sample) were tested for antimicrobial susceptibility using both the conventional agar disc diffusion method (12 antimicrobials) and a commercially available miniaturized test (Sensi Test Gram-negative). The …