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Table 1 IgG titers at 1, 3, 5, and 7 weeks after the last immunization

From: Recombinant PAL/PilE/FlaA DNA vaccine provides protective immunity against Legionella pneumophila in BALB/c mice

Group 1 week 3 weeks 5 weeks 7 weeks
pcDNA3.1 0 ± 0 0 ± 0 0 ± 0 0 ± 0
PAL 14,933 ± 5226*** 27,733 ± 12585***/## 25,600 ± 14022***/# 7467 ± 2613**/#
PiLE 5867 ± 1306### 11,733 ± 2613### 10,667 ± 3305### 3467 ± 1573###
FLaA 5867 ± 1306### 10,667 ± 3305### 10,133 ± 4253### 2933 ± 653###
PAL/PiLE/FLaA 20,267 ± 8507*** 46,933 ± 10451*** 42,667 ± 13220*** 13,867 ± 6292***
  1. **, p < 0.01. ***, p < 0.001 versus the pcDNA3.1 group. #, p < 0.05, ##, p < 0.01, ###, p < 0.001 versus the PAL/PiLE/FLaA group