Disclosed is a semi-automatic adjustable-dose syringe, including a syringe cylinder, an adjustment cylinder, a piston sleeve rod, a T-shaped piston adjustment rod, a first spring, an outer pull cap, second springs and a needle break-proof buffer cap. An exterior of a left side of the syringe cylinder is threadedly connected to the adjustment cylinder through mutual engagement; and the adjustment cylinder is internally housed within the outer pull cap, with a sliding connection between an outer wall of the adjustment cylinder and an inner wall of the outer pull cap. The present disclosure can prolong the service life of the syringe by changing and adjusting structures and component combinations of the syringe itself, which effectively reduces wear and waste of components, ensures safe operation and saves time and labor, significantly minimizing physical harm and energy consumption of epidemic prevention personnel.

The present invention relates to a method and apparatus for delivering droplets of fluids onto an open tray (15) containing poultry. According to the invention, the apparatus comprises a stationary working surface, a single arm (16) supporting a plurality of fluid dispensing nozzles, a drive unit for driving the translation of said arm (16), said plurality of dispensing nozzles being connected to at least one fluid supply circuit comprising a fluid reservoir and a pumping unit, a control unit configured to control the drive unit of the arm and to define at least one duration T of travel of the arm (16) above said working surface. The travel time T includes a period of gradual acceleration of said arm (16) outside an area of said working surface occupied by said tray and bringing said arm to a first end of said tray (15) along the first direction at a travel velocity V, a period of constant velocity V when the arm (16) moves above said tray (15), and a period of gradual deceleration of said arm (16) when the latter has passed a second end of the tray (15) along the first direction. The control unit is also configured to control each pumping unit and activate each pumping unit only when said arm is above said tray.

The invention relates to a liquid applicator, for administering liquids, including vaccines, to animals. In particular, the applicator is useful for delivering liquids to mouths of animals.

The present disclosure provides systems and methods for disrupting the outer membrane of an oocyst in solution and delivering the solution to an animal. The system includes a vessel containing unbroken oocysts in solution, an oocyst processing chamber, and a delivery outlet. The unbroken oocysts are moved from the vessel through the processing chamber and a portion of the oocyst membranes are disrupted releasing sporocysts, the resulting solution is moved from the processing chamber into the delivery outlet where the solution is delivered to an animal. Methods of vaccination, including vaccination against an Eimeria infection, are also provided.

The invention relates to a liquid applicator, for administering liquids, including vaccines, to animals. In particular, the applicator is useful for delivering liquids to mouths of animals.