Arbovirus Antibodies

What is an Arbovirus Antibodies Test?

The Arbovirus Antibodies Test screens for exposure to a group of viruses transmitted primarily through mosquito bites, collectively known as arboviruses (arthropod-borne viruses). These include Dengue virus (DENV), Zika virus (ZIKV), Chikungunya virus (CHIKV), and West Nile virus (WNV).

Arboviral infections are prevalent in tropical and subtropical regions, but imported cases are increasingly seen in the UK due to international travel. Symptoms often resemble mild flu-like illness but can, in some cases, lead to severe complications such as neurological involvement, joint inflammation, or haemorrhagic fever.

The test works by detecting IgM and IgG antibodies in your blood. IgM indicates a recent or current infection, while IgG suggests past exposure or immunity. At London Blood Tests, we use ELISA and immunofluorescence assays (IFA) performed in UKAS-accredited laboratories, ensuring clinical accuracy and rapid turnaround.

Benefits of the Arbovirus Antibodies Test

• Comprehensive Arbovirus Detection
  Detects antibodies to multiple mosquito-borne viruses, including Dengue, Zika, Chikungunya, and West Nile virus, from a single sample.

• Differentiates Recent from Past Infection
  Identifies both IgM (recent) and IgG (past) antibodies, helping clinicians determine when infection occurred.

• Essential for Travel-Related Illnesses
  Particularly recommended for patients returning from tropical areas with fever, joint pain, or rash.

• Supports Pregnancy and Fertility Care
  Critical for individuals who are pregnant or planning pregnancy, since Zika virus can affect foetal development.

• Useful for Public Health & Occupational Screening
  Valuable for healthcare workers, researchers, or travellers potentially exposed to vector-borne infections.

• Early Diagnosis Prevents Complications
  Early detection allows timely intervention, supportive care, and monitoring for neurological or systemic complications.

• Optional GP Consultation for Review
  You can book an optional GP consultation to review your results and discuss any required medical follow-up or travel advice.

Why Do I Need an Arbovirus Antibodies Test?

You may need this test if you’ve travelled to or lived in regions with known mosquito-borne infections, particularly Asia, Africa, South America, or the Caribbean, and are experiencing symptoms such as:

• Fever or chills
• Headache and muscle pain
• Rash or joint pain
• Eye pain or conjunctivitis
• Fatigue and weakness
• Swollen lymph nodes
• Nausea or vomiting

The test is also recommended for:

• Pregnant women who have travelled to Zika-endemic areas
• Healthcare professionals or lab workers exposed to infected blood or mosquitoes
• Travellers returning with unexplained fevers or rashes
• Patients with suspected viral encephalitis where arboviral infection is possible

Prompt detection helps differentiate arbovirus infections from other tropical illnesses like malaria, leptospirosis, or typhoid.

Step-by-Step: How the Test Works

In-Clinic Testing at London Blood Tests

1. Book Your Appointment
• Schedule online or by phone, no GP referral needed.
• Pre-travel or post-travel symptom screening is optional but recommended.
2. Pre-Test Preparation
• No fasting required.
• Bring travel history details (countries visited, dates, any insect bites or illness onset).
3. Sample Collection
• A trained phlebotomist collects a small venous blood sample (typically 1–2 serum tubes).
• The procedure takes about 5–10 minutes.
4. Laboratory Analysis
• The sample is sent to a UKAS-accredited infectious disease laboratory.
• Testing is performed using ELISA and immunofluorescence assays (IFA) to detect both IgM and IgG antibodies.
5. Quality Control & Verification
• All positive or borderline results are confirmed using secondary immunoblot testing for accuracy.
6. Results Delivery
• Results are typically available within 10 business days via our secure online portal.
7. Optional GP Consultation
• You can book an optional GP review to interpret your results and discuss next steps if exposure or infection is confirmed.

At-Home Blood Draw (UK-Wide Service)

1. Book Your Appointment
• Schedule your at-home or hotel phlebotomy visit online or by phone.
• Choose a date and time that suits your schedule, same-day or next-day appointments are often available in London and surrounding areas.
2. Professional Phlebotomist Visit
• A trained and certified phlebotomist arrives at your location equipped with sterile, single-use medical supplies.
• The service is discreet, convenient, and follows strict infection-control standards.
3. Sample Collection
• The phlebotomist draws a small venous blood sample (1–2 serum tubes) from your arm, the same as in-clinic.
• The process takes approximately 10 minutes and is comfortable, hygienic, and minimally invasive.
4. Sample Handling and Transport
• Your sample is labelled, sealed, and placed in a temperature-controlled biohazard container.
• It is then couriered directly to our UKAS-accredited laboratory the same day for analysis.
5. Laboratory Testing
• The lab performs the ELISA and immunofluorescence (IFA) assays to detect IgM and IgG antibodies for multiple arboviruses.
• All testing follows ISO 15189 quality standards to ensure precise results.
6. Results Delivery
• Results are typically available within 10 business days after lab receipt.
• You will be notified by email once your digital report is ready in your secure online account.
7. Optional GP Consultation
• If your test is positive or you have ongoing symptoms, you can book an optional GP consultation (via phone or video) for expert interpretation, travel advice, and next-step recommendations.

Your Arbovirus Antibodies Test Results – Explained

Results are expressed as IgM and IgG antibody values for each virus tested (e.g., Dengue, Zika, Chikungunya, West Nile).

Typical Interpretation:

• IgM Negative / IgG Negative:
  No evidence of infection or exposure. If symptoms persist, repeat testing in 2–3 weeks to rule out early infection.
• IgM Positive / IgG Negative:
  Indicates recent or active infection. Further confirmatory testing (e.g., PCR) may be recommended to identify the specific virus.
• IgM Positive / IgG Positive:
  Suggests recent infection or reinfection. IgM usually declines within weeks, while IgG remains elevated long-term.
• IgM Negative / IgG Positive:
  Indicates past infection or long-term immunity.

Reference Values (may vary by lab):

• Negative: < 0.9 Ratio or Index
• Equivocal: 0.9–1.1
• Positive: > 1.1

Follow-up testing:

• Repeat after 10–14 days to assess antibody rise if acute infection is suspected.
• Confirm positive IgM results using RT-PCR during early infection (especially for Zika or Dengue).

All results are analysed under UKAS-accredited ISO 15189 standards, ensuring diagnostic accuracy and compliance with UK infectious disease protocols.