Abstract: A disposable microsyringe, whose tubular body is attached by its rear end into the front starting point of a longitudinal void of an intermediate housing, has located in the longitudinal void a moving head movable upon an axis and, which is connected to the rear end of the syringe plunger. The moving head is also connected, by a longitudinal rod, to a moving carriage movable upon an axis along the same direction as the moving head, and being said moving carriage guided within an elongated tube connected to at the rear end of the intermediate housing, as a continuation thereof, incorporating to said elongated tube a motor element, whose actuation drives the plunger via a moving head, a longitudinal rod and a moving carriage.

Abstract: It is done by means of a device inoculating the sample onto the gel of a Petri capsule, the application pressure of the outlet being very light in order not to harm the gel.It includes a syringe or microsyringe whose ram totally invades the chamber in order not to administer air. After inoculating the sample, the syringe is thrown away and thus conventional washing and rinsing are eliminated. It is mounted in an easily removable manner in a support frame fastened to a swing arm, there being a balancing counterweight.The syringe is remote controlled, preferably by cable and with an electric motor, by means of bearings, the cable advantageously passing through the swing axis.