Down Syndrome is caused by which additional chromosome?
20
21
22
19
The Correct Answer is B
A. 20. Trisomy 20 is not associated with Down syndrome.
B. 21. Down syndrome results from an extra copy of chromosome 21, called Trisomy 21.
C. 22. Trisomy 22 leads to other syndromes but not Down syndrome.
D. 19. Trisomy 19 is incompatible with life and does not cause Down syndrome.
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Correct Answer is D
Explanation
A. CBC: A CBC can indicate infection (elevated white blood cell count), but it is not specific for meningitis.
B. Urinalysis: Urinalysis is not relevant for diagnosing meningitis.
C. CT scan: A CT scan can detect complications like increased intracranial pressure but does not diagnose meningitis directly.
D. Lumbar puncture: A lumbar puncture allows direct analysis of CSF for glucose, protein, white blood cells, and organisms, which is definitive for diagnosing meningitis.
Correct Answer is D
Explanation
A. Pneumococcal conjugate vaccine (PCV): This vaccine is generally completed before the age of 5, so it is not typically administered at this stage.
B. Hepatitis B (HBV): The HBV series is usually completed during infancy and early childhood, so it is not needed at 5 years if the child is up to date.
C. Haemophilus influenzae type B (Hib): Hib is typically completed by 18 months of age and is not required for pre-kindergarten.
D. Measles, mumps, and rubella (MMR): A second dose of MMR is typically required at 4-6 years, aligning with pre-kindergarten vaccination schedules.