Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Microbiology > Enterobacteriacae > Flashcards

Enterobacteriacae Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is the major cell wall antigen in Enterobacteriacae

A

LPS - lipopolysaccharide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the three major components in the LPS?

A

Outer somatic polysaccharide, Core polysaccharide, and Lipid A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the common antigen that all Enterobacteriacae possess?

A

Core polysaccharide (in LPS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What part of LPS is important for epidemiologic classification of strains within a species?

A

O polysaccharide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the function of Lipid A?

A

Endotoxin - virulence factor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The serologic classification of Enterobacteriacae are based on what three major antigens?

A

Somatic O polyssaccharides, K (capsule) antigens, and H (flagellar) antigens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What diseases (two main ones) does E.coli O:157 H:7 cause?

A

Hemorrhagic colitis and hemolytic uremic syndrome (HUS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the two toxins that ETEC possesses that cause watery diarrhea?

A

STa and LT-I (heat stable toxin and heat labile toxin)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the pathogenesis of EPEC?

A

Attachment/Effacentment (A/E) – Attachment to intestinal epi cells and destruction of microvilli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

EPEC causes what symptoms and primary affects what age of people?

A

Watery diarrhea; infants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the cluster of genes called that causes virulence in EPEC and STEC?

A

locus of enterocyte effacement (LEE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What ECOL? Most infections are attributed to the consumption of undercooked ground beef or other meat products, water, unpasteurized milk or fruit juices (e.g., cider made from apples contaminated with feces from cattle), uncooked vegetables such as spinach, and fruits.

A

STEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

VTEC and EHEC are subgroups of what type of ECOL

A

STEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The diagnosis of STEC is made based on the production of what two toxins?

A

Stx1 and Stx2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What type of ECOL can cause hemorrhagic colitis and hemolytic uremic syndrome?

A

STEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What disease causes traveler’s diarrhea; infant diarrhea in developing countries; watery diarrhea, vomiting, cramps, nausea, low-grade fever

A

ETEC

17
Q

_____ is essentially identical to the Shiga toxin produced by Shigella dysenteriae

A

Stx1

18
Q

True or False: STEC strains with both Shiga toxins and attaching and effacing activity are more pathogenic than strains producing only one Shiga toxin

A

TRUE

19
Q

HUS is more closely associated with what Stx toxin?

A

Stx2

20
Q

What are the two most common organisms that cause meningitis in infants younger than one month? (1 Enterobacteriaceae and 1 non-Enterobacteriaceae )

A

ECOL and BHSB

21
Q

What serovars of Salmonella are adapted to ONLY human hosts?

A

Salmonella Typhi and Salmonella Paratyphi

22
Q

Salmonella Typhi causes a febrile illness called____?

A

Typhoid Fever

23
Q

What bacteria does this: The bacteria responsible for enteric fever pass through the cells lining the intestines and are engulfed by macrophages. They replicate after being transported to the liver, spleen, and bone marrow

A

Salmonella Typhi

24
Q

Shigella _____ strains produce an exotoxin called Shiga toxin

A

Shigella dysenteriae

25
Q

What species of Shigella is responsible for most cases in the US?

A

Shigella sonnei

26
Q

What species of Shigella predominates in developing countries?

A

Shigella flexneri

27
Q

Shigellae cause disease by invading and replicating in cells lining the __________

A

Colon

28
Q

_____ is characterized by abdominal cramps, diarrhea, fever, and bloody stools.

A

Shigellosis

29
Q

The cardinal feature of ______ is lower abdominal cramps and tenesmus (straining to defecate), with abundant pus and blood in the stool.

A

shigellosis

30
Q

What organism can grow at 4C?

A

Yersinia

31
Q

What color colonies would STEC, particularly 0157:H7, produce on sorbitol MAC plates?

A

Colorless

32
Q

What method is this and what organism is it used to isolate: by mixing the fecal specimen with saline
and then storing the specimen at 4° C for 2 weeks or more before subculturing it to agar media.

A

Cold Enrichment for Yersinia

33
Q

Y. pestis grows best at what temperature?

A

22-25C

34
Q

This organism mimics appendicitis

A

Yesinia enterocolitica

35
Q

Yersinia enterocolitica is urea ___ and indole ____ (pos/neg)

A

Positive; positive

36
Q

This organism can grow at 4C

A

Yersinia enterocolitica

37
Q

Aeromonas hydrophilia is oxidase ____, ____ (motile/nonmotile), and _____ hemolytic

A

positive, motile, beta hemolytic

Microbiology (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions