How can a specimen container be rendered biohazardous?

A specimen container is rendered biohazardous primarily when it is contaminated with potentially infectious materials. This contamination can occur through various means, such as improper handling, spillage, or if it collects blood, bodily fluids, or tissue samples that may contain pathogens. The presence of these infectious agents poses a risk not only to laboratory personnel but also to anyone who might come into contact with the container later on.

While leaving a specimen container open in the lab, storing it incorrectly, or using it beyond its expiration date may lead to safety issues or erroneous test results, these actions do not inherently render the container biohazardous in the same way that contamination with infectious materials does. Contamination directly relates to the risk of transmission of diseases and infections, which is the primary concern when determining whether a specimen container is classified as biohazardous.