Figure 3

Kaplan-Meier survival plots of contact-infected R1 and R2 turkeys. Hours post contact denotes the time (hours) after introduction of the contact turkey groups into the two pens, i.e. at 4 and 7 dpi for the R1 and R2 contacts respectively (Fig. 1). The R1 turkeys were housed between 1–7 dpi, i.e. for a total of 144 hrs (6 days) maximum, with one death occurring in the 8log₁₀EID₅₀ pen at 136 hpc (5.67 dpc). The R2 turkeys were introduced at 96 hpc (4 dpi) and housed to the end of the study at 15 dpi, i.e. for 264 hrs maximum. However, R2 turkey deaths occurred between 100–172 hpc (mean death time (MDT): 140 hrs (5.83 days)) and 88–184 hpc (MDT: 144 hrs (6.0 days)) in the 6log₁₀EID₅₀ and 8log₁₀EID₅₀ pens respectively. No deaths occurred in any of the D0 turkeys directly-infected with either dose during their 4-day housing, i.e. prior to their removal at 4 dpi (not shown).