[Detection of anti-Azotobacter antibodies in sera from tumor patients].

: Employing the agar-gel double immunodiffusion technique, the authors describe the presence of antibodies to a protein fraction existing in the supernatant of Azotobacter chroococcum cultures in a high percentage of blood sera from cancer patients. The small number of false positive results makes them think of the convenience of increasing the sensitivity of the procedure to valorate its usefulness for the early diagnosis of malignant tumors.