2 replies to this topic

[Tindarra]

Has anybody come across this ?  Likelihood of spores surviving 90 degree C for 20 seconds ?

Possible source? Only found in one batch.

 

Visible floating mass in bottle and causing fermentation.

[Evans X.]

Greetings Tindarra,

 

It is highly unlikely, but not impossible. Ascomycetes spore-forms have been found to survive extreme heat temperatures (90^oC for 10 minutes or 20 minutes a couple of species) and some of them also managed to germinate when they were returned to optimal conditions.

You are facing two scenarios:

First is that you are extremely unlucky and the Fusarium strain had already formed spores before the heat treatment, thus explaining the survival, and also it managed to germinate afterwards.

Second case if that your specific batch might have been contaminated from another source after your heat treatment process.

 

Regards!

[Tindarra]

Greetings Tindarra,

 

It is highly unlikely, but not impossible. Ascomycetes spore-forms have been found to survive extreme heat temperatures (90^oC for 10 minutes or 20 minutes a couple of species) and some of them also managed to germinate when they were returned to optimal conditions.

You are facing two scenarios:

First is that you are extremely unlucky and the Fusarium strain had already formed spores before the heat treatment, thus explaining the survival, and also it managed to germinate afterwards.

Second case if that your specific batch might have been contaminated from another source after your heat treatment process.

 

Regards!

 

Many thanks for the reply. I am thinking it may be the first as the bottles are filled into PET bottles at 70 C  immediately after pasteurizing @ 98 C.