Culture and Sensitivity, Aerobic- VITEK Test
About Culture and Sensitivity, Aerobic- VITEK Test
| Field | Value |
|---|---|
| Also Known As | C&S Aerobic (VITEK) Test, Aerobic Bacterial Culture with AST, Antimicrobial Susceptibility Testing, Antibiotic Sensitivity Test |
| Sample Type | Varies by infection site — urine, pus, sputum, wound swabs, body fluids, tissue, and many others |
| Fasting Required | No |
| Report Time | 3 days |
| Recommended For | All genders and age groups with suspected bacterial infection |
| Price | Starting at ₹950 |
What is a Culture and Sensitivity, Aerobic- VITEK Test?
The culture and sensitivity, aerobic- VITEK test is a laboratory test that identifies bacteria causing an infection and determines which antibiotics can effectively treat it. A sample is collected from the suspected infection site and analysed using the VITEK 2 automated system, a machine that rapidly identifies bacteria and tests their response to a range of antibiotics. Doctors prescribe this test when they need to confirm a bacterial infection and choose the right antibiotic. It is also known as the C&S aerobic (VITEK) test, aerobic bacterial culture with AST, antimicrobial susceptibility testing, or antibiotic sensitivity test.
What Does a Culture and Sensitivity, Aerobic- VITEK Test Measure?
This test analyses a patient's sample using aerobic culture combined with automated minimum inhibitory concentration (MIC) testing. The VITEK system runs biochemical and metabolic assessments to provide two key pieces of information.
The key results this test provides are listed below:
| Component | What It Tells You |
|---|---|
| Bacterial Identification | Identifies whether bacteria are present in the sample and names the specific organism |
| Antimicrobial Susceptibility Testing (AST) | Shows which antibiotics are effective, intermediate, or ineffective against the identified bacteria |
| Minimum Inhibitory Concentration (MIC) | Measures the lowest antibiotic concentration needed to stop bacterial growth |
Why is a Culture and Sensitivity, Aerobic- VITEK Test Done?
A doctor may order this test when a bacterial infection is suspected but the exact cause is unknown or when a known infection is not responding to initial treatment.
Common Symptoms That May Require This Test
The following symptoms are common reasons a doctor may request this test:
- Fever, chills, or unexplained exhaustion
- Burning or pain when urinating, or increased urge to urinate
- Wound discharge, redness, or swelling at an injury site
- Persistent cough with discoloured or blood-tinged sputum
- Headache with stiff neck or sensitivity to light
- Pus or discharge from the ear, eye, or skin
- Signs of sepsis such as high fever, rapid breathing, and low blood pressure
Conditions This Test Can Help Detect
This test can help identify several types of bacterial infections, including:
- Urinary tract infections (UTIs) caused by bacteria such as Escherichia coli
- Blood infections, including bacteraemia and sepsis
- Respiratory infections such as pneumonia (from sputum samples)
- Skin and soft tissue infections from wound swabs or pus
- Infections in body fluids such as cerebrospinal fluid, pleural fluid, or synovial fluid
- Hospital-acquired infections caused by bacteria like Staphylococcus aureus or Pseudomonas aeruginosa
- Antibiotic-resistant infections such as MRSA (methicillin-resistant Staphylococcus aureus)
How to Prepare and What to Expect
No special preparation is needed for this test, but following a few steps will help ensure that the sample collected is not contaminated and that results are accurate.
Do You Need to Fast?
No, fasting is not required before this test. You may eat and drink normally. However, inform your doctor about any antibiotics or other medications you are currently taking, as these can affect the test results.
Practical Tips Before Your Test
The following tips will help ensure your sample gives accurate results:
- Bring a detailed clinical history including your symptoms, previous test results, and family history, as this is required for the test.
- If possible, provide your sample before starting any antibiotic treatment, as antibiotics already in your system can affect the results.
- Inform the collection staff about any antibiotics or other medications you are currently taking.
- The sample must be collected using sterile technique to prevent contamination from skin or surrounding areas.
- For swab samples, transport to the lab should ideally happen within 4 hours of collection.
Step-by-Step Procedure
Here is what you can expect during sample collection for the culture and sensitivity, aerobic- VITEK test procedure:
- A sample is collected from the suspected infection site; this could be urine in a sterile container, a swab from a wound, sputum, body fluid, or another specimen depending on where the infection is.
- The sample is handled using aseptic (germ-free) techniques throughout collection to avoid contaminating it with bacteria from the skin or environment.
- In the laboratory, the sample is placed on culture media that support the growth of aerobic (oxygen-requiring) bacteria and kept at body temperature (37°C) for 24 to 48 hours.
- Once bacterial colonies form, they are loaded onto VITEK 2 identification cards, which carry out a series of biochemical tests to identify the exact species.
- Simultaneously, antimicrobial susceptibility testing (AST) cards are used to measure how the bacteria respond to a panel of antibiotics, producing MIC values for each.
- The system generates a final report, usually within 3 days.
Factors That Can Affect Accuracy
Several factors can influence how reliable your results are:
- Taking antibiotics before sample collection, which may suppress bacterial growth and cause a false-negative result
- Sample contamination with skin bacteria, which can cause a false-positive result
- Delay in transporting the sample to the laboratory
- Improper storage temperature during transit
- Some slow-growing or fastidious (hard-to-grow) bacteria may not be detected by standard aerobic culture methods
Understanding Your Culture and Sensitivity, Aerobic- VITEK Test Results
Your results will show whether bacteria were found and, if so, which antibiotics are likely to work. Always review your report with your treating doctor, who will interpret the findings in the context of your symptoms and overall health. The table below shows the interpretation of test results:
| Result | Interpretation |
|---|---|
| No Growth | No bacteria were detected; the result is negative |
| Growth Detected | Bacteria were found; further identification and sensitivity testing follows |
| Susceptible (S) | The antibiotic is likely to be effective at a standard dose |
| Intermediate (I) | The antibiotic may be effective at a higher dose or more frequent schedule |
| Resistant (R) | The antibiotic is unlikely to work against the identified bacteria |
Disclaimer: These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain circumstances can affect how your results should be read:
Prior antibiotic use can suppress bacterial growth in the sample, which may lead to a false-negative result or an altered pattern of antibiotic sensitivity. If you have already started antibiotics, inform your doctor so they can factor this into the interpretation.
Sample contamination is another possibility. If bacteria found in the culture came from the skin or collection equipment rather than the actual infection site, the result may appear falsely positive. Your doctor will consider the clinical picture alongside the laboratory findings.
How to Maintain Healthy Levels
These general wellness habits can help reduce the risk of bacterial infections and support antibiotic effectiveness:
- Practise regular hand hygiene, especially before eating and after using the bathroom.
- Always complete the full course of any prescribed antibiotic, even if you feel better sooner, to prevent resistance.
- Seek prompt medical attention if you notice signs of infection such as persistent fever, localised pain, or wound discharge.
Lupin Diagnostics Culture and Sensitivity, Aerobic- VITEK Test Price and Home Collection
The culture and sensitivity, aerobic- VITEK test cost starts at ₹950 at Lupin Diagnostics, and home sample collection is available for eligible sample types. The following table shows indicative prices across cities:
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 1150 |
| CHENNAI | 790 |
| HYDERABAD | 750 |
| KOLKATA | 750 |
| NAVI MUMBAI | 950 |
| PUNE | 950 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps for culture and sensitivity, aerobic- VITEK test online booking:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers culture and sensitivity, aerobic- VITEK test home collection across cities for eligible sample types such as urine, wound swabs, and sputum. All samples are processed in NABL-accredited laboratories by trained microbiologists. Your digital report is accessible via email or WhatsApp once ready.
Frequently Asked Questions
The VITEK 2 is a fully automated machine that identifies bacteria through biochemical analysis and tests their response to antibiotics simultaneously. It produces results faster and with greater consistency than traditional manual culture methods, helping doctors make quicker treatment decisions.
Reports are typically ready within 3 days at Lupin Diagnostics. The test results are shared directly via email or WhatsApp.
Ideally, the sample should be collected before you start any antibiotic course. Antibiotics already in your system can slow or stop bacterial growth in the laboratory, which may lead to a false-negative result or alter the sensitivity pattern. Tell your doctor and the collection staff if you have already started treatment.
A "No Growth" result means no bacteria were detected in your sample. This is considered a negative result and generally suggests no bacterial infection was present at the sampled site. Your doctor will assess this alongside your clinical symptoms before drawing any conclusions.
The test detects aerobic bacteria, meaning organisms that grow in the presence of oxygen. These include common pathogens such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella species. The test does not detect viruses, fungi, Chlamydia, or mycobacteria (the bacteria causing tuberculosis).
If bacteria appear resistant to all antibiotics on the panel, your doctor may consider combining two or more medicines that may work better together. This decision will be based on your full medical history, infection severity, and the advice of a specialist. Do not adjust or stop any medication without consulting your doctor.
The aerobic VITEK method can be used on a variety of sample types, including urine, blood, pus, wound swabs, sputum, stool, and tissue samples. Your doctor will decide which sample is most appropriate based on where the infection is suspected.
Culture and Sensitivity, Aerobic- VITEK Test
