From: Congenital transmission of Trypanosoma cruzi in Argentina, Honduras, and Mexico: study protocol
Time of extraction | Source | Blood sample | Tests to perform | Storage requirements |
---|---|---|---|---|
Birth | Umbilical cord | 15 ml EDTA | Stat-Pak. | - |
T. Detect, | ||||
ELISA*, | Filter paper 4°C, Plasma -20°C* | |||
PCR* | 10 ml Guanidine 4°C* | |||
Umbilical cord | 5 ml heparinized | Parasitological examination* | Max 6 hours at 4°C | |
Before hospital discharge* | Maternal, venous in all (+) subjects | 15 ml EDTA | Stat-Pak, | - |
T. Detect, | ||||
ELISA, | Filter paper 4°C, Plasma -20°C, | |||
PCR | 10 ml Guanidine 4°C | |||
Follow-up visit at 4–8 weeks after birth* | Infant, venous, or heel stick | 2 ml heparinized, 6 capillary tubes (ideally), or at least one capillary tube | Parasitological examination | Max 6 hours at 4°C |
Siblings, finger prick | 10 μl | Stat-Pak | - | |
100 μl | ELISA | Filter paper 4°C | ||
Follow-up visit at 10 months after birth* | Infant, venous or heel stick or digital puncture | 3 ml EDTA, or at least one Eppendorf EDTA tube and one filter paper | Stat-Pak, | - |
T. Detect, | ||||
ELISA | Filter paper 4°C, Plasma -20°C |