Evaluation of EBV-B lymphocytes viability incubated with Pseudomonas aeruginosa by Lactate Dehydrogenase (LDH) activity. LDH activity was evaluated in the incubation medium after 90 min incubation of EBV-B lymphocytes with Pseudomonas aeruginosa or not. Unit represents the number of µmol of substrate transformed per min in 200 µl of contact medium. (DOC)