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Erstellt / Aktualisiert 15.05.2022 / 22.05.2022
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Fenster schliessen

Micrococcaceae 2

part of the normal flora of the mammalian skin

found in water, soil, air, food

weak proteolytic properties - some couse sweet curdling of milk

hygiene microbiological indicators of water, food and technological processes

constant meat microflora: curing (contribution to development of curing colour and flavour in meat products)

Fenster schliessen

Staphylococcus 1

facultative anaerobes, catalase(+), oxidase(-)

facultative anaerobes, catalase(-), oxidase(-)

facultative aerobes, catalase(+), oxidase(-)

facultative anaerobes, catalase(+), oxidase(+)

facultative aerobes, catalase(+), oxidase(-)

Fenster schliessen

Staphylococcus 2

found on the animal and human skin and mucous membranes, in water, soil, air, food

resistant to antibiotics: plasmid encoded antibiotic resistance and transfer

sensitive to disinfectants

constant meat microflora: curing (contribution to development of curing colour and flavour in meat products)

reduction of nitrates, decomposition of proteins or amino acids

Fenster schliessen

Staphylococcus aureus ...

is a caogulase(+) pathogen

produces heat-resistant enterotoxin

is obligate aerobe, oxidase (+)

is a coccus, tetradarranging

is pigmented (carotenoid pigments)

Fenster schliessen

Saprophytic species are used as starter cultures:

S. xylosus

S. carnosus

S. aureus

S. luteus

S. marcescens

Fenster schliessen

Streptococcus 1

nonmotile, sensitive to antibiotics

nonmotile, catalase (+), oxidative metabolism of sugars to water and CO2, reduce nitrates

catalase and oxidase(-), incapable of reducing nitrate

found on oral mucous membranes; in milk

found on the animal and human skin and mucous membranes, in water, soil, air, food

Fenster schliessen

Streptococcus 2

nonmotile, sensitive to antibiotics

produces heat-resistant enterotoxin

facultative anaerobes, catalase(+), oxidase(-)

phatogenic species cause mastitis & pyoderma of skin and wounds

weak proteolytic properties - some couse sweet curdling of milk

Fenster schliessen

What is true about these Streptococci?

S. thermophilus is a thermophile Streptococcus

S. bovis is found in ruminant digestive system

S. pyogenes (a betahemolytic streptococci) is a phatogenic species

S. carnosus is found in raw meat

S. xylosus metabolizes xylose