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Chickensplash: splash trial videos

Citation

Carmody, Caitlin et al. (2022), Chickensplash: splash trial videos, Dryad, Dataset, https://doi.org/10.5061/dryad.4xgxd25bz

Abstract

The Food and Drug Administration (FDA) recommends against washing raw chicken due to the risk of transferring dangerous food-borne pathogens through splashed drops of water. Many cooks continue to wash raw chicken despite this warning, however, and there is a lack of scientific research assessing the extent of microbial transmission in splashed droplets.  Here we use large agar plates to confirm that bacteria can be transferred from the surface of raw chicken through splashing. We also identify and create a phylogenetic tree of the bacteria present on the chicken and the bacteria transferred during splashing. While no food-borne pathogens were identified, we note that organisms in the same genera as pathogens were transferred from the chicken surface through these droplets. Additionally, we show that faucet height, flow type, and surface stiffness play a role in splash height and distance. Using high-speed imaging to explore splashing causes, we find that increasing faucet height leads to a flow instability that can increase splashing. Further, splashing from soft materials such as chicken can create a divot in the surface, leading to splashing under flow conditions that would not splash on a curved, hard surface. Thus, we conclude that washing raw chicken does risk pathogen transfer and cross-contamination through droplet ejection, and that changing washing conditions can increase or decrease the risk of splashing.

Methods

A high-speed camera (VEO 710L, Phantom) was placed between 0.5-1m away from the splash point, and videos were taken at 1500 fps. Floodlights were used to illuminate the surface. A cue ball was used to simulate a solid surface, and a stress ball was used to study splashing from a soft surface. Trials were run for 15 to 30 seconds. Videos were saved as .avi files. 

Funding

National Science Foundation, Award: # 1813654

Army Research Office, Award: W911NF - 19 - 1 - 0288

National Institute of General Medical Sciences of the National Institutes of Health through Montana INBRE, Award: P20GM103474

Montana State University Undergraduate Scholars Program

National Science Foundation, Award: DMR-1455247