A Practical Review of Cytomegalovirus in Gastroenterology and Hepatology
Table 1
Definitions and risk factors of the described CMV clinical entities in the general, IBD, and liver transplant patient populations.
Disease manifestation
Definition
Risk factors
General population
Latent CMV
Asymptomatic, no clinically detectable active replication
Female sex, older age, high crowding index, and low household income or education [2]
Mononucleosis-like syndrome
Predominant constitutional, mononucleosis-like symptoms with intact immune system
Blood transfusions, second or third decades of life, exposure to bodily fluids of infected host [14]
Tissue-invasive CMV
Predominant symptoms localizable to a specific tissue site
Critical illness (especially with sepsis or intubation at time of admission), active malignancy (especially with low BMI, lymphopenia, or steroid use), hematologic malignancy, blood transfusion [27]
Inflammatory bowel disease
Tissue-invasive CMV
Predominant symptoms typically localizable to the GI tract, mimicking IBD flare
Positive CMV serum PCR with 2 of the following: (i) for at least 2 days (ii) New fatigue or malaise (iii) Leukopenia or neutropenia (iv) ≥5% atypical lymphocytes (v) cell/μL or >20% decrease (vi) >2 xULN ALT or AST
Predominant symptoms localizable to a specific tissue site
Latent CMV and mononucleosis-like syndrome definition and risk factors are as with the general population. Latent CMV definition and risk factors are as with the general population.