Quick answer
The Gram Stain Test costs ₹320 at Live Line Health Care. A quick microscope test that stains a swab or discharge sample to show whether bacteria are present and whether they are Gram-positive or Gram-negative. No fasting is needed. It uses a swab sample and the report is usually ready the same day.
Also known as: Gram Smear, Gram Staining, Smear for Gram Stain, Gram Stain Microscopy, Direct Gram Smear
What is the Gram Stain Test?
A Gram Stain is one of the fastest tests in microbiology. A little of the swab or discharge is smeared on a slide, treated with a series of dyes and examined under a microscope. Bacteria with a thick cell wall hold on to the purple dye and are called Gram-positive. Those with a thin wall lose it, take up a pink dye and are called Gram-negative. The lab also notes their shape, either round cocci or rod-shaped bacilli, and whether pus cells are present, which suggests the body is reacting to an infection.
This gives your doctor an early clue, often before a culture has even started to grow. For example, Gram-negative diplococci inside pus cells in urethral discharge strongly suggest gonorrhoea, and clusters of Gram-positive cocci in a wound point towards staphylococci. A Gram Stain does not, however, name the exact species or test antibiotics. A Swab Culture or Pus Culture does that, so doctors often order the two together. Viruses cannot be seen with this stain, and TB bacteria do not stain well, so they need the AFB smear instead.
What it measures: The presence of bacteria and pus cells in a smear, with the bacteria sorted by Gram reaction and shape.
Parameters included (4)
- Pus Cells
- Gram-positive Organisms
- Gram-negative Organisms
- Organism Shape: Cocci or Bacilli
Why is this test done?
- Getting a first clue about an infection the same day
- Discharge from the urethra or vagina
- Assessing a vaginal smear for bacterial vaginosis
- A wound or skin discharge, usually along with a culture
- Judging whether a sample shows signs of infection
When should you get tested?
- Discharge from the penis or vagina
- Burning urine along with discharge
- Vaginal itching or a fishy odour
- A weeping wound or skin sore
- A discharging ear or eye
How to prepare for the Gram Stain Test
- 1The smear is collected at the centre, so this test cannot be booked for home collection.
- 2For urethral discharge, try not to pass urine for at least an hour or two beforehand, as it can wash the germs away.
- 3Do not use douches or apply antiseptics or non-prescribed creams to the area before the sample.
- 4Tell the staff about any antibiotics taken in the past two weeks.
Gram Stain Test normal range
| Parameter | Typical reference range |
|---|---|
| Expected result | No organisms and no or few pus cells. Normal flora may be noted where expected |
| Organisms seen | Described by type, for example Gram-positive cocci in clusters or Gram-negative bacilli |
| Pus cells | Reported as occasional, few, moderate or many, or as a number per field |
This is a descriptive report, so wording varies by lab and by sample site. Your doctor reads it together with your symptoms. Ranges are typical adult values and vary between labs, age and sex. Always use the range printed on your report and discuss results with your doctor.
Understanding your results
- Pus cells together with organisms suggest a true infection at that site.
- Organisms without pus cells may simply be normal flora or contamination.
- A negative smear does not rule out infection, since a certain number of bacteria must be present to be seen, and earlier antibiotics can lower that number.
- This test cannot tell which antibiotic will work. Only a culture and sensitivity report can do that.
- If a sexually transmitted infection is suspected, your report stays private, and your doctor can advise you about treatment and about telling a partner.
Gram Stain Test – FAQs
What is the price of the Gram Stain Test?
The Gram Stain Test costs ₹320 at Live Line Health Care, at all 45 centres.
What do Gram-positive and Gram-negative mean?
They describe how bacteria react to the stain. Gram-positive bacteria have a thick wall and look purple. Gram-negative bacteria have a thin wall and look pink. The difference gives your doctor an early idea of the likely germ family.
How is a Gram Stain different from a culture test?
A Gram Stain is a direct microscope look and is usually ready the same day. A culture grows the germ over 2 to 3 days, names it and tests antibiotics. The first offers speed, while the second offers detail, so they work well together.
What does Gram-positive cocci in clusters mean?
It means round, purple-staining bacteria were seen in grape-like bunches, a pattern typical of staphylococci. These include common skin germs as well as Staphylococcus aureus. A culture is needed to name the species and to show if it is an infection.
Why are pus cells mentioned on a Gram Stain report?
Pus cells are white blood cells that move to a site of infection or inflammation. Seeing many of them suggests your body is responding to something. They help your doctor decide whether bacteria on the slide are likely to be causing illness.
Can a Gram Stain detect gonorrhoea?
It can give a strong clue, especially in men with urethral discharge, where typical Gram-negative diplococci may be seen inside pus cells. It is less reliable in women, so a doctor may ask for other tests. Your result remains private.
Is a Gram Stain report enough to start an antibiotic?
That is a decision for your doctor. In urgent cases a doctor may begin treatment based on this early clue, then adjust it once the culture report arrives. Please do not start an antibiotic on your own after reading the report.
Where can I get the Gram Stain Test done?
At any of our 45 Live Line Health Care centres in 40 cities across Andhra Pradesh and Telangana, including Hyderabad, Visakhapatnam, Warangal, Kakinada and Nellore. This test is done at a centre, not at home.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.