Torch Complex Notes

Torch Complex

The acronym ‘TORCH’ complex refers to the development of a common complex of symptoms in infants due to infection with different microorganisms that include:

1. Toxoplasma
2. Others
3. Rubella

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Toxoplasmosis Pregnancy

Cytomegalovirus, and Herpes simplex virus; category of ‘Others’ refers to infections such as hepatitis B, coxsackievirus B, mumps, and poliovirus. The infection may be acquired by the fetus during intrauterine life, or perinatally and damage the fetus or infant.

Since the symptoms produced by the TORCH group of organisms are indistinguishable from each other, it is a common practice to test for all the four main TORCH agents in a suspected pregnant mother or infant.

Rubella Pregnancy

It has been estimated that TORCH complex infections have an overall incidence of 1-5% of all live-born children. All the microorganisms in the TORCH complex are transmitted transplacentally and, therefore, infect the fetus from the mother.

Toxoplasmosis Pregnancy

• Herpes and cytomegalovirus infections are common intrapartum infections acquired venereally.

• Toxoplasmosis is a protozoal infection acquired by contact with cat’s faeces or by ingestion of raw uncooked meat.
• Rubella or German measles is teratogenic in pregnant mothers. Cytomegalovirus and herpesvirus infections are generally transmitted to fetus by chronic carrier mothers.

An infectious mononucleosis-like disease is present in about 10% of mothers whose infants have Toxoplasma infection. Genital herpes infection is present in 20% of mothers whose newborn babies suffer from herpes infection.

Rubella infection during the acute stage in the first 10 weeks of pregnancy is more harmful to the fetus than at the later stage of gestation.

Rubella Pregnancy

Symptoms of cytomegalovirus infection are present in less than 1% of mothers who display antibodies to it. The classic features of the syndrome produced by the TORCH complex are seen in congenital rubella.

The features include:

1. Ocular defects
2. Cardiac defects
3. CNS manifestations
4. Sensorineural deafness
5. Thrombocytopenia and
6. Hepatosplenomegaly.

The fetal damage caused by TORCH complex infection is irreparable and, therefore, prevention and immunization are the best modes of therapy.

TORCH Complex:

Torch complex refers to development of symptoms in infants due to infection with Toxoplasma, Others, Rubella, Cytomegalovirus, and Herpes simplex virus; the category of ‘Others’ refers to infections such as hepatitis B, coxsackievirus B, mumps, and poliovirus