Culture Water: Presumptive Coliform Count Test
Short Name: Presumptive Coliform Count Test
Also known as: Coliform Bacteria Test, Water Coliform Test, Presumptive Coliform Detection
Culture Water: Presumptive Coliform Count Test test available at DNA Labs India for ₹1,112. Uses Multiple tube test on Potable water samples. Results in Report available in 3 days after sample receipt.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Kothari Ramesh Shantilal
Consultant Microbiologist · Reg: 27670
Last reviewed: September 7, 2026
Overview
To determine the presence of coliform bacteria in water, indicating potential contamination and assessing water safety for consumption.
- Test Code
- 402
- Price
- ₹1,112
- Sample Type
- Potable water
- Result Time
- Report available in 3 days after sample receipt.
- Fasting Required
- No
- Method
- Multiple tube test
Sample Collection
Ensure water sample is collected from the source to be tested. Use sterile containers provided or obtained from the lab.
Method: Home collection or walk-in
Laboratory Analysis
Collect water aseptically into three 60 mL sterile screw capped containers, totaling 180 mL. Label each container with water source and date.
Report Delivery
Ship sample refrigerated immediately. Avoid freezing. Complete test request form with source details.
Timeline: Report available in 3 days after sample receipt.
Patient Instructions
About This Test
Who Should Get This Test
To determine the presence of coliform bacteria in water, indicating potential contamination and assessing water safety for consumption.
How to Prepare
- Submit total 180 mL potable water in three 60 mL sterile screw capped containers.
- Ship sample refrigerated; do not freeze.
- Specify water source on containers and test request form.
- Strictly adhere to requested volumes for accurate results.
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"Regular testing of water for coliform bacteria is essential to prevent waterborne diseases and ensure public health safety."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Insufficient sample volume (less than 180 mL)
- Non-sterile or contaminated containers
- Sample not refrigerated during transport
- Missing or incorrect labeling of water source
Understanding Your Results
Positive (Gas production observed)
Presence of coliform bacteria detected. This indicates possible contamination and requires further testing, such as confirmatory MPN or MF tests, to identify specific bacteria.
Action: Avoid consumption of water; consult a healthcare provider if symptoms arise. Treat or disinfect water source.
Negative (No gas production)
No coliform bacteria detected. Water is likely safe for consumption based on this test.
Action: Continue regular monitoring as part of water quality management.
Consult a doctor if you experience symptoms like diarrhea, vomiting, or fever after consuming water, especially if the test is positive or if you suspect water contamination.
Limitations
- ⚠This is a presumptive test; positive results require confirmatory testing for specific bacterial identification.
- ⚠Does not detect all types of pathogens; other tests may be needed for comprehensive analysis.
- ⚠Results may be affected by sample quality and handling conditions.
Risks & Considerations
- ●No direct health risks to the individual from the test itself.
- ●Risk of inaccurate results if sample collection or handling guidelines are not followed.
Interfering Factors
- ●Improper sample collection or storage
- ●Contamination during handling
- ●Delays in sample processing beyond stability period
- ●Incorrect incubation temperature or time
Compare With Similar Tests
| Test | Culture Water: Presumptive Coliform Count Test | Most Probable Number (MPN) Test | Membrane Filter (MF) Test | Total Coliform Count Test | E. coli Detection Test |
|---|---|---|---|---|---|
| Comparison | Culture Water: Presumptive Coliform Count Test |
Frequently Asked Questions
What is the Presumptive Coliform Count Test?
Why is this test important for water safety?
How is the water sample collected for this test?
What does a positive result mean?
What are the symptoms of coliform contamination?
How long does it take to get results?
Is fasting required for this test?
What is the cost of the Presumptive Coliform Count Test?
How accurate is this test?
Can this test detect E. coli specifically?
What should I do if my water tests positive?
How often should water be tested for coliforms?
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