Haemophilus

Question 1

Are both statements true?

Fastidious organisms requires nutritional supplement and need special growth requirements. Fastidious organisms are also fast growers

Answer 1

No, only 1st statement is true.
Ratio: Fastidious organisms are slow growers

Question 2

True or false
Haemophilus spp that need X factor as growth requirement have positive results in Porphyrin test

Answer 2

False
Ratio: The haemophilus spp that will have positive results in Porphyrin test are the ones that do not need X factor for growth requirement because they already have it.

Question 3

Drug choice for Haemophilus ducreyi

Answer 3

Erythromycin

Question 4

Drug of choice for other haemophilus spp

Answer 4

Ceftriaxone

Question 5

Haemophilus spp that only needs X factor as growth requirement

Answer 5

H. ducreyi

Question 6

Haemophilus spp that do not need both factors for growth requirement

Answer 6

H. aphrophilus

Question 7

Haemophilus spp that causes soft chancre

Answer 7

H. ducreyi

Question 8

MOT for H. ducreyi

Answer 8

Sexual intercourse

Question 9

causes Brazilian purpuric fever

Answer 9

H aegypticus

Question 10

Clinical manifestations causes by Haemophilus influenzae

Answer 10

Meningitis
Epiglottitis
Bacterial tracheitis
arthritis
Septicemia
pneumonia

Question 11

causes contagious conjunctivitis or “pink eye”

Answer 11

Haemophilus aegypticus

Question 12

Leading cause of meningitis in children

Answer 12

Serotype B

Question 13

Encapsulated strain usually involved in ______ infection

Answer 13

invasive

Question 14

Nonencapsulated strain usually involved in ______ infection

Answer 14

localized

Question 15

True or False
Nonencapsulated strains usually cause more severe type of disease than encapsulated strains

Answer 15

False

Question 16

Painful lesion with an irregular edge

Answer 16

Chancroid

Question 17

causes bite wound infections and endocarditis

Answer 17

Haemophilus aphrophilus

Question 18

Non-hemolytic
Translucent, tannish, moist, smooth, and convex
“Mousy” or bleach-like odor in CHOC agar
Encapsulated strains are larger and mucoid

Answer 18

Haemophilus influenzae

Question 19

Done for routine identification or differentiation of Haemophilus spp.

Answer 19

SATELLITISM TEST

Question 20

True or False
All Haemophilus species are oxidase and catalse positive that can ferment carbohydrates.

Answer 20

False
H.ducreyi does not ferment carbohydrates