Untreated victims of severe combined imunodificiency usually die from

Options

A. infections that in other people are minor
B. anaphylactic shock
C. congested lungs
D. unusualy high fever.

Answer

**Step-by-Step Solution:**

1. **Understanding Severe Combined Immunodeficiency (SCID):**
- SCID is a genetic disorder characterized by the disturbed development of functional T cells and B cells caused by numerous genetic mutations. This leads to a severely compromised immune system.

2. **Identifying the Risks Associated with SCID:**
- Individuals with SCID lack effective immune responses, making them highly susceptible to infections. They cannot produce adequate immune responses to pathogens, including bacteria, viruses, and fungi.

3. **Common Infections in SCID Patients:**
- Untreated SCID patients are particularly vulnerable to opportunistic infections. Common pathogens that can cause severe illness in these individuals include:
- Pneumocystis jirovecii (a fungus that causes pneumonia)
- Cytomegalovirus (a virus that can cause severe disease)
- Various bacterial infections (e.g., from common skin bacteria)

4. **Conclusion on Cause of Death:**
- Due to the inability to fight off infections, untreated victims of severe combined immunodeficiency usually die from severe infections that their body cannot combat effectively.

**Final Answer:**
Untreated victims of severe combined immunodeficiency usually die from severe infections due to their compromised immune system.

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