Abstract: A vial adaptor is disclosed. The vial adaptor can include a cap member and a piston. The cap member can removably couple to a vial storing, for example, liquid constituent for facilitating sample collection for detecting pathogens. The piston can distally translate through the cap member and into the vial to generate volume displacement and positive pressure, which can cause the liquid constituent stored in the vial to flow out from the vial via a channel formed within the piston. The piston can include a cover that creates a water-tight seal with an inner surface of the vial.

Abstract: A vial adaptor is disclosed. The vial adaptor can include a cap and a piston. The cap can removably couple to a vial storing, for example, liquid constituent for facilitating sample collection for detecting pathogens. The piston can distally translate through the cap and into the vial to generate volume displacement and positive pressure, which can cause the liquid constituent stored in the vial to flow out from the vial via a channel formed within the piston. The piston can include a seal that creates a water-tight barrier with an inner surface of the vial. In certain approaches, the piston may translate as a result of rotating the piston.