Standardized, automated procedure for measurement of serum hemolytic complement activity

Area of Science:

• Immunology
• Clinical Chemistry

Background:

• Complement fixation tests are crucial in diagnostics but often lack standardization and automation.
• Existing methods can be time-consuming and labor-intensive.

Purpose of the Study:

• To develop and validate an automated AutoAnalyzer manifold for complement fixation procedures.
• To standardize and streamline the measurement of serum hemolytic complement activity (C').

Main Methods:

• An AutoAnalyzer manifold was designed to mix reagents in proportions similar to the Laboratory Branch Complement Fixation test.
• The fixation stage was bypassed to directly measure serum hemolytic complement activity (C').

Main Results:

• The automated manifold effectively measured serum hemolytic complement activity (C').
• Up to 21 serum samples per hour could be screened using two appropriate dilutions.
• Normal adult C' titers measured by this automated procedure ranged from 58 to 103 C'H(50) units per ml.

Conclusions:

• The developed AutoAnalyzer manifold provides a standardized and automated approach for measuring serum hemolytic complement activity.
• This method offers efficient screening of complement activity, with potential applications in clinical diagnostics and research.