Methods: to detect peripheral blood t lymphocyte adn in the patients with liver failure treated with MARS and the normal control by flow cytometer, observer the regular pattern was observed.

The T cells subgroup absolute count and the NK activity of malignant tumor patient's PBMC can be obviously elevated by transfusing CD3AK cell.

Conclusion: There no diagnosis value of WBC and lymphocyte to infant diarrhea disease, but neutrophilic band form and B/N value are important for the infant diarrhea diagnosis.