Week 5: Infections in immunocompromised hosts Flashcards
When to think immune deficiency?
Common evaluation
Examples of infections in innate immune deficiency
- Chronic granulomatous disease
- Terminal complement deficiency (C5-9)
- Netropenia
- Leukocyte adhesion defects
- Job’s Syndrome
Innate immune deficiency causes
Decreased chemotaxis, diminished phagocytic capacity & defective intracellular killing
Infective etiologies of innate immune deficiency
Hepatic abscesses
Skin infections
Gingivitis
Recurrent pyrogenic infections
Infectious organisms in innate immune deficiency
- S. aureus
- CoNS
- viridans strep
- enterococcus
- E. coli
- P. aeruginosa
- Serratia
- Aspergillus
- Nocardia
Examples of humoral antibody deficiency
- X-linked agammaglobulinemia
- CVID
- CLL
- MM
- Extensive RxTx
- Chemo
humoral antibody deficiency Dx
Failure to make Ab to new Ag or even Ab after vaccines
Infectious etiologies of humoral antibody deficiency
- Recurrent sinopulmonary infections with encapsulated organisms
- Chronic diarrhea
- Aseptic meningitis
- Echoviruses
Infectious organisms of humoral antibody deficiency
- Strep pneumo
- H. influenzae
- Giardia
- Enteroviruses
- Campylobacter
- Shigella
Causes of Cellular immune deficiency
- Digeorge Syndrome
- Extensive irradiation
- Immunosuppressives (Corticosteroids, cyclosporine, tactrolimus, monoclonal Ab)
- Hoggkin’s Lymphoma
- AIDS
- CD4 lymphopenia
Infectious etiologies of Cellular immune deficiency
- Intracellular organisms
- viruses
Infectious agents of Cellular immune deficiency
- Listeria
- PJP
- Nocardia
- Mycobacteria
- Histoplasma
- Coccidiodomycosis
- Aspergilius
- Toxoplasma gondii
- HSV
- CMV
Causes of Asplenia immune deficiency
- Splenectomy
- Cirrhosis
Asplenia immune deficiency caused by
Reduced properdin so suboptimal opsonization
Low levels of circulating IgM
Infectious etiologies of Asplenia immune deficiency
Encapsulated organisms
Infectious agents of Asplenia immune deficiency
- Strep pneumo
- H. influenzae
- N. meningiditis
- Captocytophaga
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C.
E. coli
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B. Pseudomonas
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