Table 2 Number of colostrum, mature milk, and maternal blood samples and proportions with anti-SARS-CoV2 virus or antibodies detected by semiquantitative analysis (reported as a ratio)
Analysis | Colostrum | Mature milk | Maternal blood at birth |
|---|---|---|---|
IgA | |||
Indeterminate (0·8 to 1·1) | 4 (2.14%) | 0 (0%) | 15 (12.5%) |
Negative (< 0·8) | 29 (15.5%) | 51 (75.0%) | 42 (35.0%) |
Positive (> 1·1) | 129 (69.0%) | 15 (22.1%) | 62 (51.7%) |
Insufficient sample | 25 (13.4%) | 2 (2.94%) | 1 (0.833%) |
Missing | 2 (1.1%) | 121 (64.0%) | 69 (36.5%) |
Total simples analysed | 187 | 68 | 120 |
IgG | |||
Indeterminate (0·8 to 1·1) | 3 (1.60%) | 0 (0%) | 9 (6.47%) |
Negative (< 0·8) | 155 (82.9%) | 63 (92.6%) | 61 (43.9%) |
Positive (> 1·1) | 5 (2.67%) | 3 (4.41%) | 68 (48.9%) |
Insufficient sample | 24 (12.8%) | 2 (2.94%) | 1 (0.719%) |
Missing | 2 (1.1%) | 121 (64.0%) | 50 (26.5%) |
Total simples analysed | 187 | 68 | 139 |
IgM | |||
Indeterminate (0·9 to 1·1) | 0 (0%) | 0 (0%) | 4 (4.26%) |
Negative (< 0·9) | 61 (60.4%) | 52 (96.3%) | 59 (62.8%) |
Positive (> 1·1) | 15 (14.9%) | 0 (0%) | 30 (31.9%) |
Insufficient sample | 25 (24.8%) | 2 (3.70%) | 1 (1.06%) |
Missing | 88 (46.6%) | 135 (71.4%) | 95 (50.3%) |
Total simples analysed | 101 | 54 | 94 |
rRT-PCR | |||
Negative | 73 (90.1%) | ||
Positive | 0 (0%) | ||
Inhibited | 3 (3.70%) | ||
Insufficient sample | 5 (6.17%) | ||
Missing | 108 (57.1%) | ||
Total simples analysed | 81 | ||