Serum complement titers refer to the measurement of the concentration or levels of different components within the complement system found in the blood serum. These components play a crucial role in the body's immune response, helping to identify and eliminate pathogens. However, if you are looking for alternative synonyms for this term, you may consider using phrases like "complement system levels in the blood", "serum complement concentration assessment" or "measurement of serum complement activity". These synonymous expressions can be used interchangeably to describe the evaluation of complement system components within the blood serum, providing valuable insights into an individual's immune function.