Hi MES12,
Further to my previous post, from the Guidance for Industry: Juice Hazard Analysis Critical Control Point Hazards and Controls Guidance the main pathogens of concern are:
For example, Salmonella species have been the cause of several illness outbreaks related to orange juice and may be considered the "pertinent microorganism" for orange juice products. E. coli O157:H7, a bacterial pathogen, and Cryptosporidium parvum, a protozoan parasite, have both been the cause of outbreaks in untreated apple juice, and both should be identified as potential hazards in a hazard analysis for apple juice.
Although Listeria monocytogenes has not been linked specifically to an illness outbreak from juice, it is ubiquitous in nature. For this reason, we recommend that Listeria monocytogenes be considered as a possible "pertinent microorganism" for juices that have not been associated with illness outbreaks caused by Salmonella species, E. coli O157:H7, or Cryptosporidium parvum.
Low-acid juices, such as carrot juice, that are distributed under refrigeration, and are not subject to the Low Acid Canned Foods regulation (21 CFR Part 113) may pose hazards associated with spore forming pathogens, specifically, toxins of non-proteolytic and proteolytic strains of Clostridium botulinum.
Note Section 5.0 Process Validation:
You must ensure that the process you will use has been validated, i.e., that at all times it will deliver, at a minimum, the required 5-log pathogen reduction (21 CFR 120.24(a)).
As jam has considerable less available water, considering the amount of sugar content, the process parameters suggested for juice may be a lot more stringent than what is required.
Kind regards,
Tony