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Microorganisms in Food and Factors Affecting Them

Microorganisms in Food and Factors Affecting Them -...

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Harrison FDST7060 Microbial Hazards in Food: Assessment and Control 1 Microorganisms in Food and Factors Affecting Them Microorganisms of Interest (List modified from Jay, 2000) A. Bacteria 1. Acidovorax – Gr- rods; aerobic; related to Pseudomonas ; plant inhabitants 2. Acinetobacter – (a-ci-ne’to-bac-ter) G- rods; strict aerobes; common in soils and waters; common on fresh refrigerated food products 3. Aeromonas – (ae-ro-mo’nas) G- rods; aquatic; gas produce from fermented sugars 4. Alcaligenes – (al-ca-li’ge-nes) G- rods; Produce alkaline products from sugars; widely distributed in nature (e.g., compose material) 5. Alicyclobacillus – Gr+ rods; thermoacidophilic; sporeformers; related to Bacillus species 6. Alteromonas – (al-te-ro-mo’nas) G- rods; strict aerobes; marine inhabitants; found on seafood; require seawater salinity for growth 7. Arcobacter – (ar’co-bac-ter) G- curved rods; similar to Campylobacter except they grow at 15 o C and are aerotolerant; found on poultry, pork and some other animal products 8. Bacillus – (ba-cil’lus) G+ sporeforming rods; aerobic; most species are mesophilic; common in soil and water 9. Brevibacillus – (bre-vi-ba-cil’lus) G+ sporeforming rods; common in soil, water, dust and on plants; formerly classified as Bacillus 10. Brochothrix – (bro-cho-thr’ix) G+ rods; closely related to Lactobacillus and Listeria ; also share characteristics with Microbacterium ; common on refrigerated processed meat and seafood products packaged in gas-impermeable packages 11. Burkholderia – (burkholder-ia) G- rods; formerly classed as Pseudomonas ; found on plants and in raw milk; associated with cystic fibrosis patients
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