TABLE 4.

In vitro invasiveness of and persistence in chicken kidney cells by serovar Typhimurium C5 and mutants

Time (h) after infectionLog10 viable bacterial number (geometric mean ± standard error) of strain recovered from chicken kidney cellsa
Serovar Typhimurium (parent)Serovar Typhimurium (nuoG)Serovar Typhimurium (cyoA)Serovar Typhimurium (cydA)Serovar Typhimurium (atpB)E. coli K12 proto
14.55 ± 0.034.54 ± 0.024.26 ± 0.113.19 ± 0.08*3.61 ± 0.16*1.91 ± 0.06
24.51 ± 0.274.90 ± 0.034.57 ± 0.014.57 ± 0.034.09 ± 0.062.32 ± 0.11
245.41 ± 0.145.61 ± 0.135.77 ± 0.115.88 ± 0.035.24 ± 0.032.15 ± 0.09
  • a Mean of three replicates carried out on two separate occasions, with standard error of mean. The asterisk indicates significant difference (P < 0.05) from the parental strain as determined by t test.