Indoor Air sciences CSMI Practice Exam

According to Bioaerosols and Field Guide, how quickly should bacteria samples reach the lab?

1. Within 24 hours

2. Within 72 hours properly refrigerated

3. Within 48 hours

4. Timing isn't important

The correct answer is: Within 24 hours

The correct answer indicates that bacteria samples should reach the lab within 24 hours to ensure their viability and the accuracy of testing results. Timeliness is critical in microbiological analysis because bacteria can change rapidly due to various environmental factors. If samples are not processed swiftly, the bacterial populations may grow, die, or change in composition, potentially leading to misleading results. While some choices suggest longer time frames, such as 48 or 72 hours, these extended periods could compromise the integrity of the sample and the reliability of the testing. Proper refrigeration does help slow down the growth of bacteria but may not fully preserve the sample's original state over extended delays. Therefore, the emphasis on a 24-hour timeframe is critical for maintaining the quality of the samples and obtaining accurate laboratory results.