Jump to content

  • Quick Navigation
Photo

Pathogen limits per gram and per 10 grams

Share this

  • You cannot start a new topic
  • Please log in to reply
2 replies to this topic
- - - - -

Nuttawut.s

    Grade - Active

  • IFSQN Active
  • 1 posts
  • 0 thanks
0
Neutral

  • Thailand
    Thailand

Posted 07 June 2022 - 04:52 AM

Hi everyone

  I have some question about the limit of pathogen in defference unit like 

some standard is  S. auresu = Not deteced in 0.1 g , another is  S. aureus = Not detected in 10 g 

 

I understand that not detected in 10 g is tighten (cover) 0.1 g , am i right ? 

 

Not detected in 10 g  > Not deteced in 0.1 g 


  • 0

Tony-C

    Grade - FIFSQN

  • IFSQN Fellow
  • 4,856 posts
  • 1450 thanks
791
Excellent

  • Earth
    Earth
  • Gender:Male
  • Location:World
  • Interests:My main interests are sports particularly football, pool, scuba diving, skiing and ten pin bowling.

Posted 07 June 2022 - 04:58 AM

Hi Nuttawut.s,

 

:welcome:

Welcome to the IFSQN forums.

I think I’ve got the gist of your question. Not detected in 10g is a test that is 100 times more sensitive than not detected in 0.1g

 

Kind regards,

Tony


Edited by Tony-C, 07 June 2022 - 04:58 AM.

  • 2

IFSQN Implementation Packages, helping sites achieve food safety certification since 2009: 

IFSQN BRC, FSSC 22000, IFS, ISO 22000, SQF (Food, Packaging, Storage & Distribution) Implementation Packages - The Easy Way to Certification

 

Practical Internal Auditor Training for Food Operations - Available via the previous webinar recording. 

Suitable for Internal Auditors as per the requirements of GFSI benchmarked standards including BRCGS and SQF.

 

Practical HACCP Training for Food Safety Teams available via the recording until the next live webinar.

Suitable for food safety (HACCP) team members as per the requirements of GFSI benchmarked standards including BRCGS and SQF.


Thanked by 2 Members:

moskito

    Grade - SIFSQN

  • IFSQN Senior
  • 412 posts
  • 85 thanks
21
Excellent

  • Germany
    Germany
  • Gender:Male

Posted 13 June 2022 - 12:12 PM

Hi Nuttawut,

 

for assessment you need some more information e.g. the sampling plan etc.

example:

Salmonella-"free" is often written as n.d. in 25 g

The result can be based on

a) one sample of 25 g is taken from a large batch

b) 30x 25g samples are taken in a representative mode from the same batch -> is often written as n.d. in 25 g too
    (we have performed such sampling by automatic valve during loading e.g. for chocolate)

From statistical point of view there is a huge difference for a risk assessment. 

Example b is sometimes written as n..d in 750 g. But it will not become clear whether the result is based on one sample of 750 g or 30 samples of 25g.

The better way to write e.g. micro specs as n, c, m , M as described here on p 15

microbiological-specifications-nestle.pdf

 

Rgds

moskito


  • 1

Thanked by 1 Member:


Share this

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users