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Howard Mold Set-Up Agricultural/Cold Pressed Juice

mold raw ingredients howard mold sop cold pressed juice

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#1 mcgumaur


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Posted 15 December 2017 - 08:47 PM

I work for an agricultural company using fruit that is not fresh market quality to make cold pressed juices. We've been doing this for about 6 months and have isolated mold as a key factor in quality. With some research I discovered the Howard Mold screening process. I would like to see if this can be used to test incoming fruit mold levels and also post-pressing mold levels to make sure that we won't end up with a mold count above 4 logs. Does anyone have any insight into the viability of this as a "leading indicator" and how it might be set up? I can't find an SOP online except for this : hausserscientific.com/products/howard_mold_counter.html That link is helpful and all, but I don't really know what the filaments are supposed to look like or what how to set up a correlation of length or density of filaments to total mold count. Maybe someone knows of some standards that could be applied in this application? 


My microscope will be arriving in a week or so which I magically got for free from a lab that got new equipment. I'm hesitant to order the Howard mold counting chamber (pretty pricey) until I have an SOP based on some basic understanding. Any tips or suggested reading would be greatly appreciated.

#2 JWHarris


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Posted 28 December 2017 - 01:05 AM

The Howard Mold test requires training and practice to develop the skill necessary for accuracy, and even though you have a microscope, it may not be the best one for this application.


I suggest you contact the lady below to receive proper onsite training and validation of your equipment selection. She is associated with UC Davis (California) and is a very good instructor, trusted by many of us in the tomato industry as the "final word" on Howard Mold counts.




Best of luck to you!

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