Process for reducing pathogens in a biological sample and removing a sample pellet from a sample tube
The present invention is directed towards an apparatus and method for disinfecting biological samples, including semen and the like, and for removing a biological sample pellet from surrounding media while reducing the risk of recontamination of the pellet with said media. An insert receptacle includes a receiving cylinder having a drain in a floor which allows the fluids to decant slowly down the side of a tube. The insert receptacle further includes an aspiration channel which allows an aspiration device, such as a modified micro-pipette, to be utilized for extracting a sample pellet from the bottom of the tube. Utilizing the novel apparatus, a method for reducing pathogens in a biological sample includes decanting the biological sample through the receiving cylinder and into a tube where it passes through a multi-layer gradient including an enzyme suitable for removal of at least one pathogen from the biological sample. Centrifuging of the insert receptacle, tube, and sample, isolates a sample pellet of the biological sample from the surrounding at least one pathogen. After the sample pellet is isolated it is aspirated via the aspiration device without re-contaminating the sample pellet through contact with the surrounding at least one pathogen.
1. A method for removing a biological sample pellet from surrounding media of a biological sample while reducing the risk of recontamination of the pellet with surrounding media, comprising:
decanting the biological sample through a receiving cylinder into a tube, the receiving cylinder facilitating the slow release of the biological sample into the tube;
passing the biological sample through a multi-layered gradient in the tube, the multi-layered gradient for removing at least one pathogen from the biological sample; and
aspirating through an aspiration device a biological sample pellet formed from passing the biological sample through the multi-layered gradient, wherein the aspiration device is inserted into the sample pellet through an aspiration channel integrally related to the receiving cylinder to provide a non-contaminated environment from which to remove the biological sample pellet.
2. The method of claim 1 , wherein the step of passing the biological sample through a multi-layered gradient includes centrifuging the receiving cylinder, tube, and biological sample.