Explain About the Pathogen test in MLT?

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Detecting and quantifying specific microorganisms that may be present in pharmaceutical
products, including bacteria, fungi, and pathogens.

๐’๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ ๐—”: Take 10 g of sample and add to SCDM 90 ml 1:10 (TAMC and TYMC).

๐’๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ ๐: Take 10 ml from sample A and add it to 90 ml SCDM at a 1:100 ratio (pathogen
test).

๐’๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ ๐‚: Add 90 ml of SCDM to a 10g/ml sample (for the salmonella test).
Discard Sample A

Samples B and C incubate at 30-35ยฐC for 24 hours.

๐๐š๐ญ๐ก๐จ๐ ๐ž๐ง ๐“๐ž๐ฌ๐ญ

๐„.๐œ๐จ๐ฅ๐ข ๐ญ๐ž๐ฌ๐ญ
Add 1ml of sample B to the MCB and incubate at 42-44 ยฐC for 48 hours. Then, streak on an
MCA plate and incubate for 72 hours.
Color indication: brick red

๐’๐š๐ฅ๐ฆ๐จ๐ง๐ž๐ฅ๐ฅ๐š ๐ญ๐ž๐ฌ๐ญ
Add 0.1ml of sample C to the 10mL RVSEB and incubate at 30-35ยฐC for 48hrs. Then, streak
on an XLDA plate and incubate for 48 hours at 30-35ยฐC.
Indication with or without black center.

๐๐ฌ๐ž๐ฎ๐๐จ๐ฆ๐จ๐ง๐š๐ฌ ๐ญ๐ž๐ฌ๐ญ
Incubate the sample B streak on a CA plate at 30-35 degrees Celsius for 72 hours.
Indication: fluorescent green color.

๐’๐ญ๐š๐ฉ๐ก๐ฒ๐ฅ๐จ๐œ๐จ๐œ๐œ๐ฎ๐ฌ ๐ญ๐ž๐ฌ๐ญ
Incubate the sample B streak on an MSA plate at 30-35 degrees Celsius for 72 hours.
Indication golden yellow color colonies.

All the test according to specification.
Refer
USP <62>

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