two types of commercial products for feeding zoo animals ( a frozen meat product , referred to as zoo food , and a dry product , referred to as dry food ) were microbiologically examined for spoilage organisms ( aerobic , psychrotrophic , coliform , escherichia coli , mold , and yeasts ) and pathogens ( salmonella spp. , listeria monocytogenes , and campylobacter jejuni ) .
C0029235
organisms
C0450254
pathogens