Patients | Samples | Infant samples | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Age of infants | VZV IgG (EIU) of infants | VZV IgG (EIU) serum:CSF ratio | VZV IgG antibody index | VZV IgM of infants | Influenza A IgG (EIU) of infants | |||||
S | CSF | S | CSF | S | ||||||
1 | I | 4 d | 82 | 10 | 8.2 | Not done | Not done | Negative | 116 | |
II | 11 d | 59 | 8 | 7.4 | 20.8 | Negative | Negative | 75 | ||
III | 7 m | 38 | Unspecified | < 20 | ||||||
2 | I | 25 d | 65 | 15 | 4.3 | 13.4 | Negative | Not done | 91 | |
II | 62 d | 66 | 8 | 8.3 | Not done | Negative | Negative | 51 | ||
III | 6 m | < 20 | Positive | < 20 | ||||||
3 | I | 9 d | 86 | 11 | 7.8 | 9.3 | Negative | Negative | 103 | |
II | 57 d | 76 | < 5 | Not done | Not done | Negative | Negative | 80 | ||
III | 11 m | 24 | Negative† | < 20 | ||||||
4 | I | 5 d | 58 | 16 | 3.6 | Not done | Positive | Not done | 36 | |
II | 25 d | 111 | 6 | 18.5 | 8.3 | Positive | Unspecified | 28 | ||
Mean | I | 10.8 d | 72.8 | 13 | 6 | 11.4 | ||||
II | 38.8 d | 78 | 5.8 | 11.4 | 14 | |||||
Mean difference | I-II | 28.0 d | −5.3 | 7.3 | −5.4 | −3.0 | ||||
5 | I | 1 d | 88 | < 5 | Negative | Negative | 35 | |||
II | 17 d | 51 | Not done | Negative | Not done | 37 | ||||
6 | I | 11 d | 81 | < 5 | Negative | Negative | 58 | |||
II | 49 d | 87 | Not done | Negative | Not done | 22 | ||||
7 | I | 5 d | 64 | < 5 | Negative | Negative | 100 | |||
II | 21 d | 64 | < 5 | Negative | Not done | 73 | ||||
8 | I | 6 d | 75 | < 5 | Negative | Negative | 75 | |||
II | 21 d | 51 | < 5 | Negative | Not done | 46 | ||||
III | 7 m | < 20 | < 20 | |||||||
9 | I | 2 d | 63 | < 5 | Negative | Negative | 162 | |||
II | 51 d | 31 | < 5 | Negative | Negative | 120 | ||||
III | 8 m | < 20 | Not done | 76 | ||||||
10 | I | 3 d | 81 | < 5 | Negative | Negative | 95 | |||
II | 57 d | 46 | < 5 | Not done | Negative | 70 | ||||
III | 6 m | < 20 | Negative | < 20 | ||||||
Mean | I | 4.7 d | 75.3 | |||||||
II | 36 d | 55.0 | ||||||||
Mean difference | I-II | 31.3 d | 20.3 |
Maternal samples | ||||
---|---|---|---|---|
Gestational weeks/age of infants | VZV iGG (EIU) of mothers | VZV IgM of mothers | Influenza A IgG (EIU) of mothers | |
S | S | S | ||
6 h | 691-150 | Unspecified | Not done | |
16 h | 74 | Negative | 84 | |
62 days | 141 | Positive | 123 | |
8 h | 54 | Negative | 89 | |
57 days | 86 | Negative | 107 | |
14 h | 107 | Not done | Not done | |
25 days | 104 | Not done | Not done | |
11 h | 76 | 87 | ||
48 days | 110‡ | 115 | ||
−32 | −28 | |||
15 h | 45 | Negative | 60 | |
7 h | 22 | Positive | 68 | |
12 h | 72 | Negative | 97 | |
5 days | 73 | Unspecified | 95 | |
15 h | 58 | Negative | 54 | |
5 days | 64 | Negative | 67 | |
10 h | 35 | Negative | 68 | |
2 days | 41 | Negative | 147 | |
14 h | 59 | Negative | 193 | |
3 days | 62 | Negative | 86 | |
12 h | 48.5 | 90 | ||
3, 8 days | 60 | 99 | ||
−11.5 | −9 |
↵1-150 At the gestational age of 16 weeks VZV IgG 102 EIU. †At the age of 5 months VZV IgM weakly positive. ‡ The difference between the groups is significant (p=0.03).
EIU indicates antibody titre and it is obtained when the optical density (OD) of the sample in dilution 1:200 is compared with the OD of the positive control and multiplied by 100. Values ⩾ 100 are considered high and values ⩽20 negative in serum, and <5 negative in CSF.