Nelson - Ch. 194 H. influenza Flashcards

1
Q

H influenza ? Gram staining ? shape

A

Gram neg, pleomorphic coccobacillus

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

Requirements of H influenza for growth

A

Factor X (hematin), Factor V (phosphopyridine nucleotide)

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

H influenzae ? capsule

A

Yes, serotyped in 6 distinct types designated a,b,c,d,e,f

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

T/F Humans are the only natural hosts of H. influenzae

A

T

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

T/F H influenza is part of the normal respiratory flora of healthy children

A

T, in 60-90% of healthy children

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

T/F Asymptomatic colonization with H influenzae type b occurs at a much lower rate in immunized populations

A

T

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

Socioeconomic factors for invasive G. influenzae type b disease

A

1) Childcare outside the home 2) Siblings of elementary school age or younger 3) Short duration of breastfeeding 4) Parental smoking

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

In Hib infection, history of ___ is associated with risk for invasive disease

A

Otitis media

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