Enterobacteriales Flashcards
Enterobacteriales
Gram (positive or negative?) _____
Motile by ___________; some are non motile
Negative rods
peritrichous flagella
Enterobacteriales
Form endospores or microcysts
T/F
F
Do not form endospores or microcysts
Enterobacteriales
Are not acid-fast.
T/F
T
Enterobacteriales
In terms of oxygen, are either ______ or _______
aerobes/facultative anaerobes
Enterobacteriales
grow well on standard lab media at 19-22
None grow on D glucose as the sole source of carbon
some require vitamins and/ or amino acids.
Have both oxidative and fermentative metabolism
T/F
F. 22–35
F. Some do
T
T
An endospore is a _____,______, and _________ structure produced by certain bacteria
dormant, tough, and non-reproductive
Enterobacteriales
produce _____ and ______ during fermentation of d-glucose, other carbohydrates and polyhydroxyl alcohols.
acid and visible gas bby
Enterobacteriales
Flourishes in a salty environment
T/F
F
Not halophilic
Enterobacteriales
Most are catalase-(positive or negative?) , except for __________ O group 1 and _______.
Most are oxidase (positive or negative?) , except for ________.
Most reduce _____ to _____, except _________
positive
Shigella dysenteriae; Xenorhabdus
Negative; Plesiomonas
nitrate to nitrite; Saccharobacter fermentatus
Enterobacteriaceae- family
Small or Large ?
(Homo or Hetero?) geneous group
Habitat:_______
The family includes the following genius:( ___,____,____,____,_____,____,______and others
Large
Hetero
gut of man and animals
Escherichia, Shigella, Salmonella, Enterobacter, Klebsiella, Serratia, Proteus,
Enterobacteriaceae- family
Some such as _________, are part of the normal microbiota and incidentally cause disease
others e.g. the ___ and ______ , are regularly pathogenic for humans.
Escherichia coli
salmonellae and shigellae
Enterobacteriaceae- family
possess a (simple or complex?) antigenic structure
produce a variety of toxins and other virulence factors
Complex
E.coli
In terms of oxygen is __________.
Aerobic and facultatively anaerobic
E. coli
Motile or non motile?
Motile by peritrichous flagella
Ecoli is motile by ______ flagella
Motile by peritrichous flagella
E.coli
Catalase _______
Oxidase _______.
Positive
negative
Ecoli
______________ are formed from most fermentable carbohydrates
When Lactose is fermented, it Usually (do or do not ?) produce H2S.
Occur naturally in the (upper or lower?) part of the ______ of warm-blooded animals
Both acid and gas
Do not
Lower; intestine
E.coli can ferment glucose
E.coli can ferment lactose
T/F
T
T
Diseases caused by E. coli
Diarrhoea
• ___________
•__________
•______________
•____________
•________
•____________
shiga toxin-producing E. coli (STEC)
Enterotoxigenic E. coli (ETEC)
Enteroaggregative E. coli (EAEC)
Enteroinvasive E. coli (EIEC).
Enteropathogenic E. coli (EPEC)
Diffusely adherent E. coli (DAEC).
Diseases caused by E. coli
Diarrhoea
• Shiga toxin-producing E. coli (STEC): This is the bacteria most commonly known for E. coli _______________
E.g E. coli _______
food contamination.
O157:H7
shiga toxin-producing E. coli (STEC): AKA ______________ and _________
enterohemorrhagic E. coli (EHEC) and verocytotoxin-producing E. coli (VTEC).
Shiga-like toxin (STEC ) has been associated with __________, a severe form of diarrhea, and with ___________
hemorrhagic colitis
hemolytic uremic syndrome
Enterotoxigenic E. coli (ETEC): This strain is commonly known as a cause of ____________
Enteroaggregative E. coli (EAEC) causes __________ diarrhea.
travelers’ diarrhea.
acute and chronic
Entero_______ E. coli is an important cause of diarrhea in infants.
pathogenic