FASTIDIOUS GRAM NEGATIVE RODS.3.AEGYPTUS

Question 1

what diseases are caused by haemophilus aegyptius

Answer 1

1. Acute contagious conjunctivitis
2. Brazilian purpuric fever

Question 2

Haemophilia aegyptius is a normal flora of which part

Answer 2

Upper respiratory tract

Question 3

difference between H. influezae and H. aegyptus

Answer 3

resembles each other except that colonies of H. aegyptus are smaller at 48hrs

Question 4

what are the signs and symptoms of acute contagious conjunctivitis caused by Haemophilus influezae

Answer 4

1. Itchy eyes
2. Tearing
3. Redness
4. Light sensitivity

Question 5

what is the mode of transmission of haemophilus aegyptus

Answer 5

1. Person to person spread by contaminated droplets
2. Certain infections may be caused by persons endogenous strains (normal flora)

Question 6

what are common specimens for haemophilus egyptus

Answer 6

Conjuctivae swabs

Question 7

what are the special media used for haemophilus aegyptus

Answer 7

1. CHOC agar w/ 1% IsoVitaleX or Vitox (required due to fastidious nature).
2. Requires both X (hemin) and V (NAD) factors

Question 8

Explain the microscopic morphology of haemophilus aegyptus

Answer 8

Varies from small, gram negative coccobacilli to long filaments, and often stains faint pink

Question 9

Explain the colony morphology of haemophilus aegyptus

Answer 9

H. egyptius resembles H. influenzae on CHOC with a small, translucent,
tannish, moist, smooth, and convex appearance, accompanied by a “mousy”
or bleach-like odor

Question 10

What is the treatment of haemophilus aegyptus

Answer 10

1. Idoxuridine solution and ointment,
2. Vidarabine ointment
3. Trifluridine solution