Gram-positive, endospore forming rods 💊

Question 1

▪can cause foodborne disease 🍽
▪ can produce extracellular enzymes that hydrolyze 🍞🍗🧈🍕 carbohydrates, proteins, and lipids
▪ rod-shaped, straight cells
▪ vary widely in size and shape
▪ single or in chains
▪ motile or non-motile
▪ mesophiles or psychrotrophic
▪ aerobes or facultative anaerobes
▪ all form endospores that are spherical or oval and large or small
▪ spores are highly heat resistant

Answer 1

Bacillus cereus

Question 2

▪ food spoilage especially in canned products 🥫
▪ can produce extracellular enzymes that hydrolyze 🍞🍗🧈🍕 carbohydrates, proteins, and lipids
▪ rod-shaped, straight cells
▪ vary widely in size and shape
▪ single or in chains
▪ motile or non-motile
▪ mesophiles or psychrotrophic
▪ aerobes or facultative anaerobes
▪ all form endospores that are spherical or oval and large or small
▪ spores are highly heat resistant

Answer 2

Bacillus coagulans, stearothermophilis

Question 3

▪ used in food bioprocessing ❇️
▪ natto 🫘
▪ can produce extracellular enzymes that hydrolyze 🍞🍗🧈🍕 carbohydrates, proteins, and lipids
▪ rod-shaped, straight cells
▪ vary widely in size and shape
▪ single or in chains
▪ motile or non-motile
▪ mesophiles or psychrotrophic
▪ aerobes or facultative anaerobes
▪ all form endospores that are spherical or oval and large or small
▪ spores are highly heat resistant

Answer 3

Bacillus subtilis

Question 4

▪ pathogens 🩹 and are important in food
▪ used as sources of enzymes to hydrolyze 🍞🍗 carbohydrates and proteins in food processing
▪ rod-shaped cells that vary widely in size and shape
▪ motile or non-motile
▪ anaerobes
▪ mesophiles or psychrotrophs
▪ form endospores
▪ some have spores that are heat resistant
▪ found in 🕳️🚧🛢🚰soil, marine sediments, sewage, decaying vegetation, and animal and plant products

Answer 4

Clostridium botulinum, perfringens

Question 5

▪ associated with food spoilage 🍽
▪ used as sources of enzymes to hydrolyze 🍞🍗 carbohydrates and proteins in food processing
▪ rod-shaped cells that vary widely in size and shape
▪ motile or non-motile
▪ anaerobes
▪ mesophiles or psychrotrophs
▪ form endospores
▪ some have spores that are heat resistant
▪ found in 🕳️🚧🛢🚰 soil, marine sediments, sewage, decaying vegetation, and animal and plant products

Answer 5

Clostridium tyrobutyricum, saccharolyticum, laramie

Question 6

▪ slender, medium sized rods
▪ motile
▪ microaerophilic
▪ homolactic fermentators
▪ form endospores but are less heat resistant
▪ found in chicken feed and soil

Answer 6

Sporolactobacillus inulinus

Question 7

▪ rod-shaped, medium-sized motile anaerobic bacteria
▪ thermophilic
▪ produce H2S 🥚
▪ endospores are oval and resistant to heat
▪ found in soil
▪ cause spoilage of canned food 🥫

Answer 7

Desulfotomaculum nigrificans