Gram-positive, non-sporulating rods 🌡

Question 1

▪ similar characteristics to lactobacilli
▪ facultative anaerobes
▪ homofermentative
▪ non-motile
▪ found in meat 🍗
▪ can grow in 🧊🫙 refrigerated vacuum-packaged meat and meat products

Answer 1

Brochotrix thermosphacta

Question 2

▪ similar in many characteristics of lactobacilli cells
▪ found in meat and fish 🐟🍗
▪ facultative anaerobes
▪ heterofermentative
▪ non-motile
▪ can grow in meat products 🍗

Answer 2

Carnobacterium piscicola

Question 3

▪ short, motile facultative anerobic rods that occur singly or in short chains
▪ can grow at 1°C
▪ cells killed by pasteurization
▪ widely distributed in the environment
▪ isolated from different types of foods
▪ important foodborne pathogens 🍽

Answer 3

Listeria monocytogenes

Question 4

▪used in food bioprocessing ❇️
▪ rod-shaped, non-motile facultative anaerobes that vary in shape and size
▪ appear in single or in small and large chains
▪ mesophiles
▪ homo- or heterofermentors
▪ found in plant sources, milk, meat, and feces

Answer 4

Lactobacillus delbreuckii, bulgaricus, helviticus, plantarum

Question 5

▪used as probiotics 🧪
▪ rod-shaped, non-motile facultative anaerobes that vary in shape and size
▪ appear in single or in small and large chains
▪ mesophiles
▪ homo- or heterofermentors
▪ found in plant sources, milk, meat, and feces

Answer 5

Lactobacillus lactis, casei, reuteri

Question 6

▪can grow in products stored at refrigerated temperature 🧊
▪ rod-shaped, non-motile facultative anaerobes that vary in shape and size
▪ appear in single or in small and large chains
▪ mesophiles
▪ homo- or heterofermentors
▪ found in plant sources, milk, meat, and feces

Answer 6

Lactobacillus sake, curvatus

Question 7

▪ used as probiotics 🧪
▪ rods of various shapes that are present singly or in chains
▪ arranged in V or star-like shape ☮️✡️ (Irreg)
▪ non-motile, anaerobic mesophiles
▪ metabolize carbohydrates to lactate and acetate 🍞
▪ found in colons of humans, animals, and birds

Answer 7

Bifidobacterium bifidum, infantis, adolescentis

Question 8

▪ implicated in the development of the aroma in several cheese varieties 🧀
▪ rod or coccoid shape
▪ aerobes
▪ non-motile
▪ mesophiles
▪ can cause spoilage in fish
▪ found in cheeses and raw milk 🧀🥛

Answer 8

Brevibacterium linens, casei

Question 9

▪ slightly curved rods
▪ facultative anaerobes
▪ non-motile
▪ mesophiles
▪ found in the environment, plants, and
animals
▪ some species causes food spoilage
▪ used to produce glutamic acid 🍬

Answer 9

Corynebacterium glutamicum

Question 10

▪ pleomorphic, non-motile anaerobic rods
▪ can be coccoid, bifid, or branched
▪ present singly or in short chains
▪ mesophiles
▪ used in dairy food fermentation
▪ produce proline and propionic acid
▪ found in raw milk, Swiss cheese, and silage

Answer 10

Propionibacterium freudenreichii