immu-q - ggccjj

[ArchivalUser]

15. A 24-year-old woman is brought to the emergency department because of a 3-day history of migratory polyarthritis. Over the past 24 hours, she has become unable to walk because of a tenosynovitis of the right patella. Examination of fluid from the right knee joint shows 50,000 leukocytes/mm3. A Gram stain of this fluid and a cervical exudate show gram-negative diplococci. Analysis of her serum for complement activity indicates that a total hemolytic complement activity is only 5% of normal. A deficiency in which of the following complement proteins enhanced the likelihood of this infection in this patient?

A. Activating enzymes (C1r, C1s, C2b, Bb, D)
B. Complement receptors (CR1, CR2, CR3, CR4, C1qR)
C. Membrane attack complex (C5b, C6, C7, C8, C9)
D. Membrane-binding proteins (C4b, C3b)
E. Peptide mediators of inflammation (C5a, C3a, C4a)

[ArchivalUser]

defeciency of membrane attack complex would increase the incidence of neisseria septeciemias..
CCCC..

[ArchivalUser]

i mean defeciency of one of the complement proteins involved in the membrane attack complex..
or the final complement pathway proteins..

[ArchivalUser]

eeeee?