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Table 3 Antibiotic resistance test of 16 Escherichia coli isolates collected from 8 birds (two isolates per bird)

From: High genetic diversity among extraintestinal Escherichia coli isolates in pullets and layers revealed by a longitudinal study

Antibiotics Isolates
L1/III-B-2-ovary1 L1/III-B-2-ovary2 L1/III-B-3-ovary L1/III-B-3-oviduct L1/III-B-4-oviduct1 L1/III-B-4-oviduct2 L2/IV-B-1-ovary L2/IV-B-1-liver L1/V-A-4-oviduct L1/V-A-4-ovary L2/V-B-5-ovary L2/V-B-5-heart L1/VI-B-1-ovary L1/VI-B-1-oviduct L2/VI-B-2-ovary L2/VI-B-2-oviduct
Ampicillin I I I R R S S S I I S S I I I I
Amoxycillin I R I R R I S I I I I I I I R I
Ceftiofur S S S S S S S S S S S S S S S S
Colistin S S S S S S S S S S S S S S S S
Doxycycline I I S R R S S S S S S R S S I S
Enrofloxacin S S S S S S S S S S S I S S S S
Gentamicin S S S S S S S S S S S S S S S S
Neomycin S S S S S S S S S S S R S S S S
Oxolinic acid S S S S S S S S S R R R R S S S
Tetracycline S S S R R S S S S S S I S S S S
Tylosin R R R R R R R R R R R R R R R R
Spectinomycin S S S S S S S S S S S S S S S S
Sulphamethoxazole + trimethoprim S S S R R S S S S S S S S S S S
  1. Each isolate ID is designated with letter “L” along with the number of layer flock and rearing farm – A (sampling at the peak of production) or B (sampling at the end of production) – number of sampled bird – organ of isolation – isolate number (in case when two isolates were collected from the same organ). Antibiotic resistance pattern of two isolates from the same bird are in bold letter and highlighted if they showed different sensitivity to antimicrobials used. S: sensitive, I intermediate, R: resistant