Microbiology

Notes

  • TORCH screens may be performed in cases of intrauterine growth retardation, intrauterine death and suspected congenital infection.
  • TORCH stands for toxoplasma, Rubella, CMV, herpes. However, this acronym is now outdated, as all these tests are not necessarily performed. HSV serology is no longer performed in this circumstance.
  • The tests performed depend on the clinical details provided.
Clinical situation Source of sample Tests performed
Viable pregnancy (e.g. IUGR) Blood from mother Rubella IgM and Rubella IgG
Toxoplasma
CMV
Parvovirus
Foetal loss Blood from mother Rubella IgM and Rubella IgG
Toxoplasma
CMV
Parvovirus
Post-natal Blood from baby * Rubella IgM and Rubella IgG
Toxoplasma
CMV

* Tests will also be performed on the mother's ante-natal blood if this is available.

Sample requirements

Serum - paired samples not required

8.5ml of blood taken into a plain gel tube

Gold top with cap

Neonatal samples into a 1 mL serum tube

1ml serum tube

Required information

  • Relevant clinical details
  • Pregnancy gestation

Storage/transport

Store at fridge temperature

Transport as soon as possible at ambient temperature

Turnaround time

Up to 8 days

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