Is overgrowth of pathogens on storage acceptable in bacterial collection media?

No, it is not acceptable for bacterial collection media to exhibit overgrowth of pathogens on storage. This overgrowth can compromise the integrity of the sample, leading to inaccurate diagnostic results. To mitigate this issue, it is recommended to store bacterial collection media under conditions that minimize the growth of bacteria, such as refrigeration at 4°C, and to process the samples as soon as possible. If storage for an extended period is unavoidable, the use of transport media that inhibit the growth of contaminants can be considered. Additionally, implementing strict quality control measures, including regular monitoring of storage conditions and the use of controls to detect contamination, can help ensure the reliability of the samples. In cases where overgrowth is suspected, it may be necessary to repeat the sample collection and analysis to ensure accurate results. Second-line interventions could include the use of selective media that inhibit the growth of certain bacteria or the application of molecular diagnostic techniques that are less susceptible to the effects of overgrowth. Ultimately, the goal is to ensure that diagnostic results are accurate and reliable, guiding appropriate patient care and minimizing the risk of adverse outcomes.