A multiple-syringe repeating bacteriophage applicator is described. It is constructed chiefly of stainless steel, to be cleaned or sterilized as a complete unit. Suspensions of phage used in it are contained and protected from contamination during use. They may be retained in it for use during extended periods. Application of 26 phages to 160 inoculated agar plates (up to 300 plates/hour), at 1 filling is possible, far faster than by hand, and with more accuracy and uniformity. There is more certainty of applying the phage to the correct square. Using the technic described, no bacteria are transferred from agar plate to agar plate during typing.