Rubella Test - IgM

Rubella is a virus that creates a rash on the skin and causes joint discomfort. Rubella is a minor infection in most adults, but it can be fatal to an unborn child. If a pregnant woman has Rubella, her baby is in danger of birth abnormalities or death. Rubella is also commonly referred to as “German Measles.” However, the Rubella virus is not the same as measles.

Rubella virus produces a moderate infection that lasts two to three days. The disease is very infectious, but a vaccination can help avoid it. The body's immune system creates Rubella antibodies in response to immunisation or illness with the Rubella virus.

A Rubella IgM test identifies and analyses Rubella antibodies in the blood. This antibody testing is the most usual way to confirm that you have been infected with Rubella recently.

A Rubella IgM antibody test is generally performed on a pregnant woman or a woman planning to become pregnant to see if she is at risk for the disease. Rubella antibodies in the blood can be detected using a variety of scientific procedures. However, the enzyme-linked immunosorbent assay is the most widely utilised approach ELISA, EIA.

Approximately half of the Rubella cases are so mild that no symptoms are present. If symptoms do arise, they generally do so two to three weeks following the illness. The following are a few symptoms of Rubella:

• Runny Nose
• Mild Fever
• Sore Eyes
• Headache
• Skin Rash
• Joint Pain
• Swollen Lymph Nodes

When a pregnant woman acquires Rubella for the first time during the first three months of her pregnancy, it is the most severe issue. At this stage, the virus is most dangerous to the growing infant (foetus).

Rubella can cause miscarriage, stillbirth or Congenital Rubella Syndrome (CRS). CRS is a collection of catastrophic birth problems that will afflict the kid for the rest of their life. Studies show that CRS is a critical public health problem in India and the country is determined to tackle it with immunisation, targeting children aged 9 months to 14 years.

CRS can result in intellectual and developmental difficulties and deafness, cataracts, minimal head, liver issues and heart anomalies.

Rubella is usually transferred when someone ingests (swallows) or inhales an infected person's cough or sneeze droplets. For months or even years, infants having CRS will shed the Rubella virus in their nasal and throat secretions, as well as in their urine.

Symptoms generally appear between 14 and 17 days (and up to 21 days) after being exposed to the virus. Rubella-infected people are contagious for about a week before the rash appears and at least four days afterwards.

Rubella is a contagious disease that affects children. Because the symptoms of Rubella are vague and non-specific, it can be challenging to diagnose. Fever is caused by various infections other than Rubella and the rash looks similar to other forms of rashes. Rubella is analysed using a variety of methods, including:

• Medical history, including immunisations & travel history
• Blood tests as part of the physical examination

Rubella has no particular medical therapy and the symptoms are typically minor. Because the infection is viral, antibiotics are ineffective. The goal of this treatment is to alleviate symptoms while lowering the risk of consequences. Among the possible treatments are:

• A period of bed rest
• High water intake
• Paracetamol, a pain reliever & fever reducer

To limit the danger of infecting others, an individual should isolate themself for at least four days after the rash appears.

If a woman gets Rubella while pregnant, consult the doctors for better treatment options.

The results of the Rubella IgM test depend on the blood samples of an adult’s vein, and for a newborn, it is from the umbilical cord or heel prick.

Congenital Rubella Syndrome, Cataracts & a few other Eye Problems, Heart Disease, Hearing Impairment, Miscarriage and Stillbirth.

The Rubella IgM test detects antibodies in the blood that form due to a Rubella infection or vaccination. Rubella testing can be used for a variety of purposes, including:

• Determining if you are safe against the Rubella virus (immunity).
• Finding out if an individual had an infection recently.
• Determining who has never been exposed to the virus and who has not received a vaccine.
• Check if a pregnant woman or those wanting to get pregnant have enough Rubella antibodies to protect them from infection.

An IgM Rubella test may be prescribed when a pregnant woman exhibits symptoms that might indicate a Rubella infection. The IgM Rubella test is also taken because of the following symptoms:

• Mild fever
• A pink rash shows up on the face and extends downhill to the body, legs and arms; once the rash goes to the body, it may vanish from the beginning
• Stuffy or runny nose
• Eyes that are red or inflamed
• Joints that hurt
• Swollen lymph nodes

When an infant is born with birth problems such as hearing loss, heart issues or hazy lenses of the eyes (cataracts) caused by Congenital Rubella Syndrome (CRS), a Rubella IgM test may be done.

The IgM Rubella antibody is the first to develop in the blood following exposure. The protein increases and peaks in the blood within approximately 7 to 10 days after infection. It is an exception in an infected infant, when it may be observed for many months to almost a year.

So, if the initial Rubella IgM test is negative, suspected cases should be checked as soon as possible after delivery and again at one-month post-delivery. Around 50% of patients would still have detectable Rubella IgM in their blood after three months.

Before the Test

Usually you don't need specific preparation for an  IgM Rubella antibody test. However, if your doctor has recommended other tests that require specific preparation, your doctor may advise you to fast for a few hours. It's best to consult your doctor before any test for guidance specific to your needs.

During the Test

During the IgM Rubella antibody test, a small amount of blood will be taken from a vein in your arm. Here's what you can expect:

• An antiseptic solution will be used to thoroughly cleanse the puncture site.
• A tourniquet will be placed around your arm tightly to make the veins more visible.
• A needle will be gently inserted into the vein selected for the test for drawing blood. It may cause a pinching sensation for a few seconds.
• The collected blood will be placed into a vial or small tube, labeled with your information.

After the Test

Consequent to the blood draw, expect the following:

• A bandage will be applied to the puncture site to prevent further bleeding.
• Slight bruising is common, but feeling dizzy is not. In that case, sit down for a few minutes.
• In case of bleeding, pain, or a rash at the needle site, please contact your doctor promptly.

IgM and IgG antibodies are the two kinds of Rubella antibodies. The IgM Rubella antibody is the first to develop in the blood following exposure.

The Rubella IgM test is the fast and standard test for detecting the Rubella virus. It is taken from blood samples when a person is acutely unwell and later as they begin to recover (convalescent phase). It is possible to confirm past infection by looking for an increase in IgG Rubella.

The Rubella IgM test gives you a result of the presence or absence of IgM antibodies.

The ranges for the Rubella IgM test are as follows. The ranges will vary during pregnancy.

The normal values and reference ranges of the test may vary from lab to lab. Please refer to the ranges mentioned in the report and consult a doctor to understand the interpretation of lab reports

A negative IgM test indicates that an individual is not infected or not detected with the Rubella virus. However, individuals having a weakened immune system may be infected and unable to produce enough antibodies to show up in the test.

A positive IgM test indicates a current or recent infection detection. For example, a Rubella vaccine has been given to a person or the person has been exposed to the virus naturally. The presence of IgG antibodies shows immunity acquired by vaccination or a previous illness. Rubella is carried by health workers who come in touch with pregnant women.

Testing soon after exposure is useless. In addition, while IgM antibodies indicate current or recent illness, low levels of IgM antibodies can sometimes remain for more than a year after infection or vaccination.