char = C;code = 67
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = L;code = 76
char = P;code = 80
char = S;code = 83
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = S;code = 83
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = O;code = 79
char = -;code = 45
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = S;code = 83
char = a;code = 97
char = l;code = 108
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = v;code = 118
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = 2;code = 50
char = 1;code = 49
char = a;code = 97
char = :;code = 58
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = m;code = 109
char = u;code = 117
char = n;code = 110
char = o;code = 111
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
result sql = Core-linked LPS expression of Shigella dysenteriae serotype 1 O-antigen in live Salmonella Typhi vaccine vector Ty21a: preclinical evidence of immunogenicity and protection.
Core-linked LPS expression of Shigella dysenteriae serotype 1 O-antigen in live Salmonella Typhi vaccine vector Ty21a: preclinical evidence of immunogenicity and protection.
char = S;code = 83
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = (;code = 40
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = );code = 41
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = o;code = 111
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = b;code = 98
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = g;code = 103
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = S;code = 83
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = -;code = 45
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = O;code = 79
char = -;code = 45
char = p;code = 112
char = o;code = 111
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = O;code = 79
char = -;code = 45
char = P;code = 80
char = s;code = 115
char = );code = 41
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = y;code = 121
char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = f;code = 102
char = b;code = 98
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = f;code = 102
char = p;code = 112
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = i;code = 105
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = g;code = 103
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = g;code = 103
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = P;code = 80
char = C;code = 67
char = R;code = 82
char = -;code = 45
char = a;code = 97
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = ,;code = 44
char = ;code = 32
char = c;code = 99
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = D;code = 68
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = e;code = 101
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = f;code = 102
char = b;code = 98
char = ;code = 32
char = O;code = 79
char = R;code = 82
char = F;code = 70
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = r;code = 114
char = f;code = 102
char = p;code = 112
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = n;code = 110
char = e;code = 101
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = s;code = 115
char = y;code = 121
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = O;code = 79
char = -;code = 45
char = P;code = 80
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = l;code = 108
char = y;code = 121
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = r;code = 114
char = f;code = 102
char = b;code = 98
char = -;code = 45
char = r;code = 114
char = f;code = 102
char = p;code = 112
char = ;code = 32
char = g;code = 103
char = e;code = 101
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char = e;code = 101
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char = c;code = 99
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char = s;code = 115
char = e;code = 101
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char = t;code = 116
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = l;code = 108
char = o;code = 111
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = p;code = 112
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = s;code = 115
char = m;code = 109
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = G;code = 71
char = B;code = 66
char = 2;code = 50
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = S;code = 83
char = d;code = 100
char = 1;code = 49
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = v;code = 118
char = i;code = 105
char = r;code = 114
char = u;code = 117
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = S;code = 83
char = a;code = 97
char = l;code = 108
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = c;code = 99
char = a;code = 97
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = v;code = 118
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = ;code = 32
char = (;code = 40
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = );code = 41
char = ;code = 32
char = T;code = 84
char = y;code = 121
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char = 1;code = 49
char = a;code = 97
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char = h;code = 104
char = a;code = 97
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char = b;code = 98
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char = g;code = 103
char = ;code = 32
char = p;code = 112
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char = d;code = 100
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char = ;code = 32
char = s;code = 115
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char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = ;code = 32
char = 9;code = 57
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 2;code = 50
char = ;code = 32
char = L;code = 76
char = P;code = 80
char = S;code = 83
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = L;code = 76
char = P;code = 80
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = n;code = 110
char = i;code = 105
char = m;code = 109
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char = e;code = 101
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char = t;code = 116
char = h;code = 104
char = ;code = 32
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char = i;code = 105
char = r;code = 114
char = u;code = 117
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
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char = S;code = 83
char = .;code = 46
char = ;code = 32
char = d;code = 100
char = y;code = 121
char = s;code = 115
char = e;code = 101
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char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = s;code = 115
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char = r;code = 114
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
char = 6;code = 54
char = 1;code = 49
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char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
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char = d;code = 100
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = f;code = 102
char = u;code = 117
char = r;code = 114
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = ;code = 32
char = T;code = 84
char = y;code = 121
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char = 1;code = 49
char = a;code = 97
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = e;code = 101
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char = a;code = 97
char = l;code = 108
char = ;code = 32
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char = a;code = 97
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char = c;code = 99
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char = n;code = 110
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
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char = y;code = 121
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
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char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = l;code = 108
char = o;code = 111
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char = o;code = 111
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char = s;code = 115
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char = ;code = 32
char = s;code = 115
char = u;code = 117
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char = p;code = 112
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char = r;code = 114
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char = i;code = 105
char = n;code = 110
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char = ;code = 32
char = t;code = 116
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char = e;code = 101
char = ;code = 32
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char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = s;code = 115
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = f;code = 102
char = u;code = 117
char = n;code = 110
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = c;code = 99
char = c;code = 99
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char = n;code = 110
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = o;code = 111
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char = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = e;code = 101
char = v;code = 118
char = e;code = 101
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char = .;code = 46
char = <;code = 60
char = b;code = 98
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char = /;code = 47
char = >;code = 62
result sql = Shigella dysenteriae serotype 1 (S. dysenteriae 1) causes severe shigellosis that is typically associated with high mortality. Antibodies against Shigella serotype-specific O-polysaccharide (O-Ps) have been shown to be host protective. In this study, the rfb locus and the rfp gene with their cognate promoter regions were PCR-amplified from S. dysenteriae 1, cloned, and sequenced. Deletion analysis showed that eight rfb ORFs plus rfp are necessary for biosynthesis of this O-Ps. A tandemly-linked rfb-rfp gene cassette was cloned into low copy plasmid pGB2 to create pSd1. Avirulent Salmonella enterica serovar Typhi (S. Typhi) Ty21a harboring pSd1 synthesized S. Typhi 9, 12 LPS as well as typical core-linked S. dysenteriae 1 LPS. Animal immunization studies showed that Ty21a (pSd1) induces protective immunity against high stringency challenge with virulent S. dysenteriae 1 strain 1617. These data further demonstrate the utility of S. Typhi Ty21a as a live, bacterial vaccine delivery system for heterologous O-antigens, supporting the promise of a bifunctional oral vaccine for prevention of shigellosis and typhoid fever.

Publication: Vaccine 2007 Aug 14 ;25(33)::6167-75.
Publication Date: 2007 Aug 14
Study Author(s): Xu, De Qi;Cisar, John O;Osorio, Manuel;Wai, Tint T;Kopecko, Dennis J;
Institution: Laboratory of Enteric and Sexually Transmitted Diseases, FDA-CBER, Bethesda, MD 20892, United States. [email protected]
Shortcut link to this study:
Shigella dysenteriae serotype 1 (S. dysenteriae 1) causes severe shigellosis that is typically associated with high mortality. Antibodies against Shigella serotype-specific O-polysaccharide (O-Ps) have been shown to be host protective. In this study, the rfb locus and the rfp gene with their cognate promoter regions were PCR-amplified from S. dysenteriae 1, cloned, and sequenced. Deletion analysis showed that eight rfb ORFs plus rfp are necessary for biosynthesis of this O-Ps. A tandemly-linked rfb-rfp gene cassette was cloned into low copy plasmid pGB2 to create pSd1. Avirulent Salmonella enterica serovar Typhi (S. Typhi) Ty21a harboring pSd1 synthesized S. Typhi 9, 12 LPS as well as typical core-linked S. dysenteriae 1 LPS. Animal immunization studies showed that Ty21a (pSd1) induces protective immunity against high stringency challenge with virulent S. dysenteriae 1 strain 1617. These data further demonstrate the utility of S. Typhi Ty21a as a live, bacterial vaccine delivery system for heterologous O-antigens, supporting the promise of a bifunctional oral vaccine for prevention of shigellosis and typhoid fever.
PMID: 17629369

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