Fungal Susceptibility Testing: Booking, Price, and Results
About Fungal Susceptibility Testing: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Antifungal Sensitivity Testing, Antifungal Susceptibility Assay, Fungal Culture and Sensitivity (C&S), Mycology Susceptibility Testing, Antimycotic Susceptibility Test, AFST |
| Sample Type | Varies by infection site: blood, urine, sputum, cerebrospinal fluid (CSF), skin scrapings, nail clippings, tissue biopsy, wound swab, or other body fluids |
| Fasting Required | No |
| Report Time | 4 to 14 days (yeasts typically 2 to 7 days; moulds may take longer) |
| Recommended For | All genders and ages; particularly immunocompromised individuals, those with invasive fungal infections, or patients not responding to standard antifungal treatment |
| Price | Starting at ₹600 |
What is Fungal Susceptibility Testing?
Fungal Susceptibility Testing, also called Antifungal Sensitivity Testing or Antifungal Susceptibility Assay, is a laboratory test that determines how well different antifungal medicines work against a specific fungus identified in a patient's sample. Doctors typically order it when a patient has a confirmed or suspected fungal infection, especially one that is not responding to initial treatment. The sample collected depends on where the infection is thought to be and may include blood, urine, sputum, skin scrapings, or other body fluids.
What Does Fungal Susceptibility Testing Measure?
Mycology Susceptibility Testing works by growing the identified fungus in the laboratory and exposing it to various antifungal drugs at different concentrations. The two key values it produces are described below.
The test reports results for several antifungal agents. The following parameters are typically assessed:
| Parameter | What It Means |
|---|---|
| Minimum Inhibitory Concentration (MIC) | The lowest drug concentration that stops the fungus from growing |
| Minimum Effective Concentration (MEC) | Used for certain drugs against moulds; shows the lowest concentration causing visible changes in fungal structure |
| Susceptibility Category | Final interpretation: Susceptible, Intermediate, Susceptible-Dose Dependent (SDD), or Resistant |
Antifungal agents commonly tested include amphotericin B, fluconazole, voriconazole, itraconazole, posaconazole, isavuconazole, caspofungin, micafungin, and anidulafungin, particularly when the infecting organism is a Candida species.
Why is Fungal Susceptibility Testing Done?
This test guides doctors in selecting the most appropriate antifungal treatment for a patient's specific infection.
Common Symptoms That May Require This Test
A doctor may request this test when a patient presents with one or more of the following:
- Persistent fever that does not improve with standard treatment
- Headache, facial pain, or swelling associated with a suspected fungal cause
- Skin rashes or lesions that are not responding to antifungal therapy
- Respiratory symptoms such as cough or shortness of breath in at-risk individuals
- Unexplained weight loss alongside signs of infection
- A known fungal infection that is failing to clear with the current medication
Conditions This Test Can Help Detect
The Fungal Culture and Sensitivity (C&S) test can assist in identifying and managing a range of fungal infections. These include:
- Invasive candidiasis (infection caused by Candida species)
- Aspergillosis (infection caused by Aspergillus species)
- Cryptococcal infections, such as cryptococcal meningitis
- Mucormycosis (a serious infection previously known as zygomycosis)
- Dermatophyte infections not clearing with standard therapy
- Resistant organisms such as Candida auris or fluconazole-resistant Candida species
Fungal Susceptibility Testing for Chronic Disease Monitoring
Patients with conditions such as chronic pulmonary aspergillosis, recurrent vaginal candidiasis, or long-term immunosuppression due to HIV/AIDS, cancer chemotherapy, or organ transplantation may require repeated Antimycotic Susceptibility Testing. Timely results from this test help clinicians make informed decisions about ongoing antifungal therapy and detect the emergence of drug resistance before it becomes a clinical problem.
How to Prepare and What to Expect
No significant preparation is needed for this test, but a few practical steps will help ensure accurate results.
Do You Need to Fast?
No fasting is required before Fungal Susceptibility Testing. You can eat and drink normally before your sample is collected. If you are having additional tests alongside this one, check with your doctor whether any of those require fasting.
Practical Tips Before Your Test
A few simple steps before your appointment will support accurate sample collection:
- Tell your doctor about any antifungal medicines you are currently taking, as these may influence results
- Share your history of previous fungal infections and any treatments you have received
- Follow the specific collection instructions your doctor or lab provides, particularly for specialised samples such as urine or wound swabs
- Ensure the collection site is as clean as possible to minimise bacterial contamination of the sample
Step-by-Step Procedure
Here is what typically happens from the moment your test is requested to when your sample reaches the laboratory:
- Your doctor identifies the site of the suspected infection and decides which type of sample is needed (for example, blood, urine, sputum, or a swab).
- A trained phlebotomist or healthcare professional collects the sample using the correct technique for that specimen type.
- The sample is placed in a controlled environment in the laboratory to encourage any fungi present to grow into a culture.
- Once sufficient growth is observed, the fungus is examined and identified, then exposed to a panel of antifungal drugs at varying concentrations.
- The laboratory measures which concentrations inhibit fungal growth, producing MIC or MEC values.
- Results are reported with susceptibility interpretations (Susceptible, Intermediate, SDD, or Resistant) and sent to your doctor.
Factors That Can Affect Accuracy
Several factors can influence the reliability of your results. These include:
- Poor sample collection technique, such as contamination with bacteria
- Incorrect storage or delayed transport of the sample to the laboratory
- Prior antifungal treatment at the time of sample collection
- Prolonged incubation periods are required for slow-growing moulds
- Certain automated testing systems, which may occasionally produce inaccurate MIC readings
Understanding Your Fungal Susceptibility Testing Results
Results from this test are not reported as a simple normal or abnormal value. Instead, they describe how the identified fungus responds to each antifungal agent tested. Always discuss your results with your treating doctor.
The table below shows the standard susceptibility categories used to report results:
| Category | Interpretation |
|---|---|
| Susceptible (S) | The fungus is likely to respond to standard doses of the antifungal agent |
| Susceptible-Dose Dependent (SDD) | A higher dose of the antifungal may be needed for effective treatment |
| Intermediate (I) | Response is uncertain; higher doses or alternative agents may be considered |
| Resistant (R) | The fungus is unlikely to respond to the antifungal at achievable concentrations |
As an example, CLSI guidelines for fluconazole tested against Candida species use the following breakpoints:
| Interpretation | MIC Value (µg/mL) |
|---|---|
| Susceptible | 8 or below |
| Susceptible-Dose Dependent | 16-32 |
| Resistant | 64 or above |
Note that breakpoints differ by fungal species and drug. Your laboratory report will apply species-specific guidelines.
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 patient circumstances can affect susceptibility patterns and how results should be read. Immunocompromised patients, including those with HIV, haematologic cancers, or those undergoing bone marrow or solid organ transplantation, may carry fungal strains with altered susceptibility profiles. Prior or prolonged antifungal exposure can select for resistant strains, making the results in these patients more complex to interpret.
How to Maintain Healthy Levels
While this test is specific to treating an active infection, a few general habits support overall fungal health:
- Keep skin clean and dry, as fungi thrive in warm, moist environments
- Manage underlying conditions such as diabetes or immune disorders that increase the risk of fungal infections
- Complete the full course of any prescribed antifungal treatment, even if symptoms improve before it is finished
Lupin Diagnostics Fungal Susceptibility Testing Price and Home Collection
Fungal Susceptibility Testing at Lupin Diagnostics starts at approximately ₹600, with prices varying by city, sample type, and whether susceptibility testing is combined with a fungal culture. Home sample collection is available for eligible specimen types.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1,200 |
| Bengaluru | ₹1,200 |
| Hyderabad | ₹1,200 |
| Chennai | ₹1,200 |
| Kolkata | ₹1,200 |
| Pune | ₹1,200 |
| Ahmednagar | ₹1,200 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your Antifungal Sensitivity Testing is straightforward. Follow these steps:
- 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
Home collection is available across cities for specimen types such as blood, urine, sputum, and wound swabs. Samples are processed in NABL-accredited laboratories by experienced microbiologists. Note that certain specialised samples, such as tissue biopsies or cerebrospinal fluid, must be collected at a clinical facility. Reports are delivered digitally for easy access and sharing with your doctor.
Frequently Asked Questions
Fungal Susceptibility Testing helps determine which antifungal medicines are effective against a specific fungus identified in a patient's sample. Doctors use it to identify drug resistance and select the most appropriate treatment when a fungal infection is not improving.
This test is most relevant for immunocompromised patients, those with invasive fungal infections such as candidiasis or aspergillosis, and patients who are not responding to their current antifungal therapy. Your doctor will advise whether this test is appropriate for your situation.
Results typically take 4 to 14 days, depending on the type of fungus involved. Yeasts such as Candida species usually produce results within 4 to 7 days. Moulds generally require a longer incubation period before susceptibility results are available.
No special preparation is required. You do not need to fast before the Antifungal Susceptibility Assay. Simply follow your doctor's instructions for sample collection, and inform them of any antifungal medicines you are currently taking.
The Mycology Susceptibility Testing process can use a wide range of specimen types. These include blood, urine, sputum, bronchoalveolar lavage fluid, cerebrospinal fluid, skin scrapings, nail clippings, tissue biopsies, and wound swabs. The appropriate sample depends on where the infection is located.
A resistant result indicates that the fungus is unlikely to respond to a particular antifungal drug at doses that are safely achievable in the body. Your doctor will review the full panel of results and consider alternative agents or dosing strategies based on your clinical situation.
Yes, home collection is available for specimen types such as blood, urine, sputum, and wound swabs through Lupin Diagnostics. Samples requiring more specialised collection, such as cerebrospinal fluid or tissue biopsies, need to be obtained at a healthcare facility by a trained clinician.
Fungal Susceptibility Testing: Booking, Price, and Results
