Gram +ve cocci in clusters - daisy187

[ArchivalUser]

Gram +ve cocci in clusters are seen in purulent fliud drained from a skin abcess.Rapid identification of these org will be facilitated by evaluation of the clumping of latex beads with which of the ff?

A IgG and fibrinogen
B IL-1 and factor 8
C Properdin and platelet factor 3
D Prothrombin and C3b
E Transferin and plasminogen

[ArchivalUser]

i think its A.not sure though.

[ArchivalUser]

sure its A

[ArchivalUser]

daisy,
can you explain the ans please?

[ArchivalUser]

hi Rumi i wish i could ut it didnt come with explanations.
they are part of the usmle 150 practise questions USMLE put out.U shld do them too

[ArchivalUser]

hello.. I am thinking A because one of the enzyme of saph a. is coagulase that has to interfere with firbinogen?? I think so!

[ArchivalUser]

i thot so too but not so certain

[ArchivalUser]

go to kaptest.com and when u register fr the free 2 week trial of their latest q bank ,u can also download the explanations to these 150 usmle cd qs

[ArchivalUser]

Daisy187

T he point to that question is basically asking where staph aureus bind, which is the FC FRAGMENT OF IgG Molecule

[ArchivalUser]

OK Dr Tigana.Thanks so much