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Table 1 The prevalence of virulence genes, virulence plasmid-associated gene, and antibiotic resistance among S. Enteritidis isolatesa

From: Prevalence, virulence factor and antimicrobial resistance analysis of Salmonella Enteritidis from poultry and egg samples in Iran

  All S. Enteritidis isolates
(n = 63)
S. Enteritidis isolates from poultry samples
(n = 52)
S. Enteritidis isolates from egg samples
(n = 11)
Virulence genes
invA 63 (100) 52 (100) 11 (100)
pagC 47 (74.6) 43 (82.7) 4 (36.4)
cdtB 4 (6.3) 4 (7.7) 0 (0.0)
msgA 63 (100) 52 (100) 11 (100)
spaN 49 (77.7) 41 (78.8) 8 (72.7)
tolC 49 (77.7) 41 (78.8) 8 (72.7)
lpfC 48 (76.1) 40 (76.9) 8 (72.7)
Virulence plasmid-associated gene
spvC 32 (50.8) 25 (48.1) 7 (63.6)
Antibiotic resistance
 Nalidixic acid 55 (87.3) 46 (88.5) 9 (81.8)
 Trimethoprim-sulfamethoxazole 13 (20.6) 12 (23.1) 1 (9.1)
vCephalothin 12 (19.0) 9 (17.3) 3 (27.3)
 Ceftazidime 7 (11.1) 5 (9.6) 2 (18.2)
 Colistin sulphate 15 (23.8) 13 (25.0) 2 (18.2)
 Kanamycin 16 (25.4) 14 (26.9) 2 (18.2)
  1. aValues are shown as number (%)