[Agglutinins in the diagnosis of pertussis]. / Aglutinini u dijagnostici pertussisa.

The performed investigation showed that the results of agglutination test in diagnostics must be explained with reserve as a supplement to the clinical picture and the other laboratory findings. Titre must be followed at least for 20 days on many blood samples. The more reliable diagnosis according to agglutination test can be given only if we know in question is a nonimmunized child and titre is > or = 1:80. The negative and lower titres cannot exclude or confirm the disease.