[Immunological methods in influenzavirus-infections (author's transl)].

Immunological methods for detection of specific antibodies after viral infections are described. The counterimmunoelectrophoresis detects various precipitating antibodies in serum and sputum (against organic dusts, p.e. bird proteins, aspergillus and viral antigens) and is suitable for routine-work due to its sensitivity and simplicity. The sepharose-fluorescence-test is very sensitive and only small quantities of test reagents are required (detection of IgA-, -M, -G-antibodies). The LN-Test (lectin-neuraminidase-test) is well suitable to detect virus-neuraminidase activities as well as antibodies against neuraminidase in human sera.