ROUND TABLE DISCUSSION ON ANTIBIOTICS
Because the participants have covered their assignments so well, a complete summary is not necessary, though it seems fair to hazard a few tentative conclusions based on our discussions. (1) No more than the broadest kind of generalizations for dosage schedules of penicillin or streptomycin are permissible at present. To serve the best interests of patients, therapy directed against any infectious agent must be individualized. Specific means for such individualization are available, and deserve wider application. (2) Probably all pathogenic micro-organisms have a number of similar mechanisms for combatting the injurious effects of antibiotic agents; some of these mechanisms have been discussed, others undoubtedly remain to be elucidated. The greatest single limiting factor for effective use of streptomycin is emergence of resistance. Some resistant organisms are probably present in any bacterial population; it is important that these be eradicated by adequate therapy at the earliest possible moment. (3) Toxic effects of penicillin are relatively minor in contrast to those of streptomycin; the danger of streptomycin therapy should be very carefully weighed against the patient's need before this agent is used. (4) Means for increasing and prolonging effective levels of antibiotic agents in body fluids at present have limited practical value, but may be of value in specific situations. (5) Clinically, "the trend" in the treatment of most infections with antibiotic agents is to increase the individual and total dosage, increase the interval between doses, reduce the number of doses and the total duration of therapy. By the very mechanism of their action, these agents should never be used to "taper off" an effective clinical response. They are rarely justified for minor infections or for an all too common indication, "just in case."