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Table 1 Effect on invasion of S. dysenteriae. S. flexneri and S. sonnei of whey, casein, PIS (sIgA), P2S (Lf, SC and albumin, SA), P3S (α-lactoalbumin), P2H (fSC and SA) and P3H (Lf).

From: In vitro adhesion and invasion inhibition of Shigella dysenteriae, Shigella flexneri and Shigella sonnei clinical strains by human milk proteins

 

S. dysenteriae wild type

S. flexneri wild type

S. sonnei wild type

 

Bacteria

n°/Hela cell

% inhibition

p

bacteria

n°/Hela cell

% inhibition

p

bacteria

n°/Hela cell

% inhibition

p

Fraction

control

Tested

  

control

tested

  

control

tested

  

Whey

5.2 ± 0,4

2.2 ± 0,2

58

0.001

0.68 ± 0.2

0.28 ± 0.2

74

0.007

0.49 ± 0.24

0.18 ± 0.15

62

0.008

casein

6.6 ± 1,0

6.5 ± 1,1

-

ns

0.89 ± 0.1

0.83 ± 0.2

-

ns

0.53 ± 0.10

0.52 ± 0.12

-

ns

slgA

6.1 ± 0,1

2.7 ± 0,2

44

0.006

1. 60 ± 0.08

0.56 ± 0.08

58

0.009

1.98 ± 0.60

1.15 ± 0.09

42

0.005

Lf+SC+AS

6.6 ± 0,4

2.7 ± 0,2

59

0.008

0.79 ± 0.04

0.51 ± 0.04

36

0.008

0.70 ± 0.05

0.16 ± 0.05

77

0.007

α-lactoalbumin

7.2 ± 0,4

7.1 ± 0,2

-

ns

0.81 ± 0.05

0.79 ± 0.02

-

ns

0.92 ± 0.60

0.85 ± 0.45

-

ns

fSC

5.8 ± O,5

3.4 ± 0,2

42

0.009

1,3 ± 0.02

0.75 ± 0.04

42

0.003

2.00 ± 0.05

0.84 ± 0.04

58

0.01

Lf

6.2 ± 0,8

3.2 ± 0,1

48

0.002

0.8 ± 0.09

0.42 ± 0.05

48

0.004

1.80 ± 0.02

0.65 ± 0.10

64

0.03

  1. ns = not significative. p = statistical analyses (t-Student independent)