Contamination-free sterilization indicating system

Claim 1

A biological indicating system for use in sterilization processes comprising: a container having access means for providing a path of unobstructed fluid communication between the interior of said container and the surrounding environment outside; test spores present within said container; a medium adapted to induce growth of said spores, said medium being present in said container but out of effective contact with said spores; a closure for said container access means, said closure being movable with respect to said access means from a first position, wherein said path of fluid communication is a tortuous path defined by a portion of the body of said container and a portion of the body of said closure, and a second position, wherein said path of fluid communication is blocked by a sealing engagement between portions of said closure and portions of said container; and means for bringing said medium into effective contact with said spores said effective contact being initiated by the movement of said closure to said second position.