Thursday, December 19, 2019

Microbial spoilage of various foods

Below is the list of microbial spoilage of meat, poultry, fish, egg, honey, confectionery, bakery. This list will help you in ASRB NET 2019 exam as at least 2 questions are asked every time related to spoilage of milk, meat, poultry, fish, egg, bakery, confectionery. The milk and milk product spoilage and spoilage microorganisms will be uploaded in the second post as soon as possible.


Food
Spoilage/contamination  type
microorganism
1.Bread
Bread Mold
Rhizopus stolonifer
Moldy
Rhizopus, Penicillium species
Pinky or reddish
Monilla sitophilla
Chalky Bread
Endomycopsis fibuligera, Trichosporon variable
Ropiness
Bacillus licheniformis
Bacillus Subtillis
Bloody bread or red bread
Serratia marcescens
Red Crumb
Geotrichum aurantiacum
2. sugar products & syrups
candy
Ropy
Enterobacter aerogenes
Yeasty
Saccharomyces
Zygosaccharomyces
Honey Spoilage
Zygosaccharomyces richteri
Pink
Micrococcus roseus
Moldy
Aspergillus, Penicillium
Salmonoellosis
salmonella
3. Fruits & Vegetables
Bacterial Soft rot
Rhizopus, Erwinia cartovora
Grey mold rot

Botrytis
Rhizopus soft rot
Rhizopus nigricans
Black mold rot
Aspergillus niger
Watery Soft rot
Sclerotinia sclerotiorum
Pink Mold rot
Trichothecium roseum
Souring
Saprophytic bacteria
Blue mold rot
Penicillium digitatum
Black rot
Alternaria, Physalospora
Green mold rot
Cladosporium
Anthracnose
Colletotrichum linedemuthianum
4.Pickles, Saurekraut
Film Yeasts & Pink Yeasts
Rhodotorula
Black pickle
Bacillus nigricans
Undesirable Odour in saurekraut
Padeococcus cerevisae
Pickle Softening
Penicillium
Pectolysis
Aeromonas
Slimy Kraut
Lactobacillus cucumeris
Bloats
Lactobacillus plantarum

5. Meats
Red Spot
Serratia marcescens
Blue color
Pseudomonas syncyanea
Earthy flavor
Actinomycetes
Souring
Pseudomonas, Micrococcus, Bacillus
Moldy
Aspergillus, Rhizopus, Penicillium
Putrefaction and canned meat spoilage
Clostridium
Green patches
Penicillium expansum
Whiskers
Thamnidium
Slimy
Leuconostoc
6. Fish
Discoloration
Pseudomonas
Smoked fish spoilage
Molds
Pink discoloration of salted fish
Helicobacterium, Helicococcus, Pseudomonas salineria
Dun spoilage
Wallemia sebi
7. Egg
Green rot
Pseudomonas fluorescens
Fungal red rot
Sporotrichum
Black rot(opaque egg)
Proteus
Red rot
Serratia marcescens
Colorless rot
Pseudomonas, Alcaligenes
8. Poultry
Slime, Odour
Pseudomomas, Alcaligenes

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Below are the books I recommend them to study food microbiology

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