drswapna
Forum Senior
Topics: 52
Posts: 129
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A previously healthy 18-month-old girl is brought to the office with
2 days of irritability, poor appetite, and pulling at her left ear. She
has no known allergies, and her vaccinations are up-to-date. On
examination, the child's temperature is 102.8 F. She is easily
consoled by the mother and moves her neck spontaneously without
discomfort. There is a clear discharge from the nares. The left
tympanic membrane is erythematous, dull, and bulging. Which of
the following virulence factors is generally absent in the
strains of the causative organism that produce otitis media,
compared with those that produce epiglottitis or meningitis?
A. b-Lactamase
B. IgA protease
C. Lipopolysaccharide
D. Nonpilus adhesins
E. Pili
F. Pneumolysin
G. Polyribitol phosphate
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| reet
Forum Fanatic
Topics: 152
Posts: 1,411
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G.. Polyribitol po4
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| sarika
Forum Guru
Topics: 195
Posts: 1,200
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this question is so difficult...i hope these kind dont appear in exam
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| Natasa
Forum Elite
Topics: 9
Posts: 291
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Encapsulated strains of Haemophilus influenzae are typable strains-it's the type B and has polyribitol phosphate capsule.It causes more VIOlent diseases-meningitis,epiglotitis,sepsis etc.
Nontypeable strains of Haemophilus(thus not having polyribitol phosphate) are causing otitis media.
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