Q- Prophylaxis in HIV patients with TMP-SMX should be initiated at which of the following CD4 counts?
A- Under 300
B- Under 200
C- Under 100
D- Under 50
B- Under 200- TMP-SMX prophylaxis is started when the CD4 count falls below 200 cells/µL to prevent Pneumocystis jirovecii pneumonia (PCP), a common opportunistic infection in HIV patients.
Q- Which one of the following tests is diagnostic for acromegaly?
A- Fasting blood glucose level
B- Serum cortisol level
C- Serum growth hormone level
D- Serum insulin-like growth factor-1 (IGF-1)
D- Serum insulin-like growth factor-1 (IGF-1)- IGF-1 is the best diagnostic test for acromegaly because it is persistently elevated and does not fluctuate during the day. Growth hormone levels vary widely and are not reliable for diagnosis.
Q- Which one of the following types of cells myelinates the axons of neurons of the CNS?
A- Astrocytes
B- Microglia
C- Oligodendroglia
D- Schwann cells
C- Oligodendroglia- Oligodendroglia (oligodendrocytes) produce myelin in the central nervous system. Schwann cells myelinate peripheral nerves. Astrocytes and microglia serve different supportive and immune functions.
Many thanks for sending questions
I will appreciate if send explanations as well.
Regards
Mahesh