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Table 1 Growth of six bacterial species in egg white of GF, SPF and conventional hens

From: Passive maternal exposure to environmental microbes selectively modulates the innate defences of chicken egg white by increasing some of its antibacterial activities

Bacterial species Germ free hens Specific pathogen free hens Conventional hens P value
Staphylococcus aureus** 7.4 ± 0.7 a* 6.4 ± 0.7 b 6.1 ± 0.5 b <0.001
Streptococcus uberis 7.3 ± 0.3 a 5.0 ± 0.6 b 4.7 ± 0.8 b <0.001
Listeria monocytogenes 3.1 ± 0.1 3.0 ± 0.2 3.0 ± 0.1 0.91
Salmonella Enteritidis 7.5 ± 0.2 7.7 ± 0.3 7.4 ± 0.2 0.11
Salmonella Gallinarum 3.2 ± 0.2 3.3 ± 0.2 3.1 ± 0.1 0.18
Escherichia coli 10.6 ± 0.6 10.6 ± 0.6 10.4 ± 0.3 0.48
  1. *mean areas under the growth curves ± standard deviation, n = 10 Means with different letters are different (p < 0.05). Data were analysed using one-way ANOVA followed by the Bonferroni-Dunn test.
  2. **Staphylococcus aureus D8 618.29, Streptococcus uberis 3029C MC, Listeria monocytogenes strain EGDe, Salmonella Gallinarum 229 K and Salmonella enterica. Enteritidis ATCC 13076 were provide d by INRA (Nouzilly) and Avian Escherichia coli CIRMBP-0096 was provided by the International Center of Microbial Resources dedicated to Pathogenic Bacteria (Nouzilly).