HomeLab TestsRespiratory Syncytial Virus (RSV) Tests
Back to Lab Tests
Respiratory Syncytial Virus (RSV) Tests
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Lab Tests

Respiratory Syncytial Virus (RSV) Tests

RSV tests identify the presence of respiratory syncytial virus in the respiratory tract to help manage moderate to severe infections.

Overview

RSV is a contagious viral infection affecting the respiratory tract. While it typically causes mild, cold-like symptoms that resolve in 1–2 weeks, it can lead to serious breathing complications in infants, older adults, and those with weakened immune systems or heart/lung disease.

Types of Tests

  • Rapid RSV antigen tests: Detect viral proteins (antigens). These provide results in an hour or less.
  • Molecular tests (RT-PCR): Detect genetic material from the virus. These are more sensitive than antigen tests and are often used for older children and adults.

Why do I need an RSV test?

Healthy adults and older children usually do not require testing. However, testing may be necessary for infants or adults over 65 who exhibit symptoms of a moderate or serious infection, such as:

  • Fever
  • Wheezing
  • Serious cough
  • Difficulty breathing or rapid breathing
  • Blue skin color

Procedure

Samples are collected from the nose, most commonly via a nasal aspirate or wash, where saline is used to flush and collect fluid. A nasal swab may also be used, though it is less preferred for collecting sufficient viral material.

Understanding Results

  • Negative result: No signs of the virus were found. This does not definitively rule out RSV, as the sample may not have contained enough of the virus to detect.
  • Positive result: Indicates an RSV infection.

Treatment for severe cases may include oxygen or IV fluids in a hospital setting. Most healthy individuals recover with over-the-counter symptom relief and fluids.

Prevention

Preventative measures include practicing good hygiene, covering your mouth when sneezing, and discussing vaccination or preventative antibody medications (such as nirsevimab or palivizumab) with your health care provider.

Frequently Asked Questions

Testing is recommended if a baby under 12 months develops fever, wheezing, a persistent cough, or rapid breathing, especially if they have trouble feeding, appear unusually sleepy, or have a bluish tint around the lips. High‑risk infants (premature, congenital heart or lung disease, or immunocompromised) should be evaluated promptly at the first sign of respiratory distress.
healthcare provider will either perform a nasal aspirate/wash—where a small amount of saline is gently flushed into the nostril and suctioned back—or use a nasopharyngeal swab. The procedure may cause brief discomfort, similar to a routine nasal swab for COVID‑19, but it is quick (under a minute) and does not cause lasting pain.
Rapid antigen tests detect viral proteins and give results in 15–60 minutes, but they are less sensitive, especially in older children and adults. RT‑PCR detects viral RNA, is more sensitive, and can identify lower viral loads; results usually take a few hours to a day. For infants with severe symptoms, clinicians often start with a rapid test for speed, then confirm with PCR if the rapid result is negative or if precise diagnosis is needed for infection control.
negative result does not rule out RSV—sampling error or low viral load can cause false‑negatives. Continue supportive care (hydration, fever control) and monitor for worsening breathing. If symptoms persist or worsen, ask the clinician for a repeat test (preferably PCR) and consider evaluation for other viruses or bacterial infections.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

kontakt@hittavard.se

Ⓒ 2024. Alla rättigheter förbehålls av juxt ab

Sök
Om ossVillkor och policyVanliga frågorKontakta oss