General investigations for a patient with suspected infection

Assalamualaikum. In the Name of Allah the Most Beneficent the Most Merciful.

I've always wanted to share this with everyone. I know some of you have this book, but I think not all of you are aware of this table. It's interesting.

General investigations for a patient with suspected infection

(You can see it as a general interpretation of the lab investigation results)

Investigation	Possible cause
Full Blood Count
Neutrophilia	Bacterial infection
Neutropenia	Viral infection Brucellosis Typhoid Thyphus Overwhelming sepsis
Lymphocytosis	Viral infection
Lymphopenia	HIV infection (not specific)
Atypical lymphocytes	Infectious mononucleosis
Eosinophilia	Invasive parasitic infection
Thrombocytopenia	Overwhelming sepsis Malaria
ESR or C-reactive protein	Elevated in all
Urea and electrolytes	Potentially deranged in severe illness from any cause
Liver enzymes
Minor elevation of transferases	Non-specific feature of many infections Mild viral hepatitis (LOL)
High transferases, elevated bilirubin	Viral hepatitis (usually A, B or E)
Coagulation	May be deranged in hepatitis, and in overwhelming infection of any type

From: pg 88, Kumar&Clarks Clinical Medicine