International Journal of Microbiology

Research Article

Growth and Survival of Acid-Resistant and Non-Acid-Resistant Shiga-Toxin-Producing Escherichia coli Strains during the Manufacture and Ripening of Camembert Cheese

Table 1

Virulence factors and acid resistance of the STEC strains used for the artificial contamination of milk.
STEC strains Virulence factors Acid-resistance Reference
Strains Serotypesa Origins eae 𝑔 𝑒 𝑛 𝑒 c 𝑠 𝑡 𝑥 1    𝑔 𝑒 𝑛 𝑒 c 𝑠 𝑡 𝑥 2    𝑔 𝑒 𝑛 𝑒 c Shiga-toxin producingb AR1 AR2 AR3 AR4
rate of survival (%) rate of survival (%) rate of survival (%) rate of survival (%)
AR STEC strainsANR O6:H10Raw milk NPPP960,500 Vernozy-Rozand et al. [34]
415ASpeccheese
ANR OntH8Raw milk NPPP607600 Vernozy-Rozand et al. [34]
245A1Rifcheese
ANR O166:H28EnvironmentNNPP80100 Vernozy-Rozand et al. [54]
V1Spec
ANR O11:H43EnvironmentNPNP67000 Vernozy-Rozand et al. [54]
V10Nal
NAR STEC strainsANR O6:H1Raw milk NPPP0000 Vernozy-Rozand et al. [34]
360BRifcheese
ANR O6:H1Raw milk NPPP0,7000,2 Vernozy-Rozand et al. [34]
42ANalcheese
ANR O6:H10Raw milk NPNP0000 Vernozy-Rozand et al. [34]
418ARifcheese
ANR O174:H8Raw milk PPPP0000 Vernozy-Rozand et al. [34]
346ASpeccheese
aOnt: O type not corresponding to any serogroup between O1 and O 174.bP production.cP, positive.N, negative.AR1: oxidative system (glucose-repressed system), AR2: system depending on the presence of glutamate, AR3: system depending on the presence of arginine, AR4: system depending on the presence of lysine.Rif: Rifampicin resistance, Spec: Spectinomicin resistance, Nal: Nalidixic acid resistance.