Niacin Detection Kit, Modified w/ Syringe K047

To study the accumulation of Niacin for differentiation of Mycobacterium species especially Mycobacterium
tuberculosis / for (presumptive) identification of Mycobacterium tuberculosis . Kit contains: 1. Part A: Reagent (1ml):
10vials 2. Part B: Reagent (1ml): 10vials 3. R055: Reagent P (4ml): 1 vial 4. Sterile syringe (1ml capacity): 2nos.
Composition**
Ingredients Gms / Litre
Part A: Reagent (1 ml) 10.000
Part B : Reagent (1 ml) 10.000
R055 : Reagent P (4 ml) 1.000
Sterile syringe (1 ml capacity) 2.000
**Formula adjusted, standardized to suit performance parameters

Directions
Test Sample Preparation:
1. Use only > 3 week old Mycobacterial culture grown on Lowenstein-Jensen Medium Slants showing heavy growth. Cultures
grown on other types of media do not produce enough niacin to yield a positive result by this method. Note: False-negative
test results, from the use of cultures, with too few organisms or from cultures grown on media other than Lowenstein-Jensen.
Do not use this test on cultures that are mixed with other mycobacteria.
2. Add 2 ml of sterile distilled water to the slant.
3. Cut or stab the slant with a spade or needle.
4. Incubate the slant upright at 370C for 2 hrs. in a water bath. OR The bottle may be just kept horizontally for 20 minutes
at room temperature to allow extraction. OR Place the bottle horizontally in the autoclave at 121°C for 30 minutes to allow
extraction of niacin into the distilled water.
5. Retain the slant in an upright position for 5 minutes.
6. Use 1 ml of this solution as a test sample.
Test :
1. Transfer content of Part A (1ml) to Part B (1 ml). Use this as a reagent solution for further test.
2. Transfer test sample (1 ml) to reagent solution (Part A + Part B) using a syringe.
3. Positive reaction- Development of yellow colour within 5 minutes.
4. Negative reaction- No development of yellow colour within 5 minutes. Reagent solution remains colourless.
Positive control :
1. Transfer content of Part A (1ml) to Part B(1ml). Use this as a reagent solution for further test.
2. Transfer 1 ml of R055 Reagent P to reagent solution ( Part A + Part B) using syringe.
3. Observe for development of yellow colour within 5 minutes.
Negative Control:
1. Transfer content of Part A ( 1 ml) to part B (1 ml) . Use this as a reagent solution for further test.
2. Transfer 1 ml of sterile distilled water or saline into reagent solution ( Part A + Part B) using syringe.
3. Colour of solution remains colourless after 5 minutes.
Precautions :
1. The reagents being photosensitive should not be exposed to light.

Please refer disclaimer Overleaf.

HiMedia Laboratories Technical Data

2. The reagents in Part A and B are toxic and form poisonous gas. Be careful while handling. It is advisable to cover nostrils
with a face mask.
3. Do not allow this reagent to come in contact with acid.
4. Part A is carcinogenic. Handle with care. Do not inhale fumes or allow to come in contact with skin.
5. Neutralize tubes by adding 10% NaOH to each tube before discarding.
6. Ensure that the syringe is thoroughly washed with sterile distilled water after each use.
Perform all work in biological safety cabinet

Principle And Interpretation

Mycobacterium tuberculosis and some isolates of Mycobacterium simiae and Mycobacterium chelonae produce
niacin during growth. These strains do not metabolize niacin further and therefore accumulate niacin which is excreted into the
agar or slant. Niacin detection test kit detects the accumulated niacin and thus helps in the confirmation of M. tuberculosis .

Quality Control
Storage and Shelf Life
Store between 2-8°C. Use before expiry date on the label.

Reference
1. Koneman, W.E. etal.1992. Color Atlas and textbook of Diagnostic Microbiology, 4th ed., J.B. Lippincott company,
Philadelphia.
2. Clinical Microbiology Procedures Handbook: Henry D. Isenberg, ASM.

Revision : 1 / 2011

Disclaimer :
User must ensure suitability of the product(s) in their application prior to use. Products conform solely to the information contained in
this and other related HiMedia™ publications. The information contained in this publication is based on our research and development
work and is to the best of our knowledge true and accurate. HiMedia™ Laboratories Pvt Ltd reserves the right to make changes to
specifications and information related to the products at any time. Products are not intended for human or animal or therapeutic use but
for laboratory,diagnostic,research or further manufacturing use only, unless otherwise specified. Statements contained herein should not
be considered as a warranty of any kind, expressed or implied, and no liability is accepted for infringement of any patents.

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