TASK DEFINITION: In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.
PROBLEM:  Allergen and particle dose - response experiments in BALB / cA and NIH mice Levels of serum OVA - specific IgE ( A , D ) , IgG1 ( B , E ) and IgG2a ( C , F ) on day 26 after injection into one hind footpad of 100 ( open columns ) , 50 ( gray ) or 10 ( black ) mug OVA combined with 100 , 40 , 10 or 0 mug PSP , or buffer ( HBSS ( hatched ) ) , in BALB / cA ( A , B , C ) and NIH ( D , E , F ) mice .

SOLUTION: serum

PROBLEM:  Furthermore , significant increases in fecal cholesterol , neutral sterols and bile acid excretion along with an increase in hepatic HMG - CoA reductase activity and bile acid production were observed in these animals .

SOLUTION: fecal

PROBLEM:  Bacterial killing was normal in the two patients studied , and chemotaxis was diminished in response to zymosan - activated plasma and to high concentrations of chemotactic peptides in the patients studied .

SOLUTION:
plasma