11-06-2006, 11:56 PM
A 22-year-old female has had malaise with pharyngitis
for a couple of weeks. She has Raynaud phenomenon, and
she is diagnosed with infectious mononucleosis. Her direct
and indirect Coombs tests are positive at 4°C, although not
at 37°C. Which of the following substances in her red
blood cells (RBCs) can account for these findings?
A Immunoglobulin E (IgE)
B Complement C3b
C Histamine
D Immunoglobin G (IgG)
E Fibronectin
for a couple of weeks. She has Raynaud phenomenon, and
she is diagnosed with infectious mononucleosis. Her direct
and indirect Coombs tests are positive at 4°C, although not
at 37°C. Which of the following substances in her red
blood cells (RBCs) can account for these findings?
A Immunoglobulin E (IgE)
B Complement C3b
C Histamine
D Immunoglobin G (IgG)
E Fibronectin