Apr 10, 2020

Nonmedical Masks in Public for Respiratory Pandemics: Droplet Retention by two-layer Textile Barrier Fully Protects Germ-free Mice from Bacteria in Droplets

BioRxiv : the Preprint Server for Biology
Alexander Rodriguez-PalaciosF. Cominelli


Due to the shortage of masks during the pandemic, we recently demonstrated that household textiles are effective environmental droplet barriers (EDBs) with identical droplet retention potential as medical masks. To further promote the implementation of a universal community droplet reduction solution based on a synchronized encouragement/enforcement of mask utilization by the public based on widely available textiles (mask fabrication without the need for sewing machines), here we conducted a study using germ-free mice to determine to what extent textiles were effective in vivo. Using a bacterial-suspension spray simulation model of droplet ejection (mimicking a sneeze), we quantified the extent by which 100% cotton textile prevented the contamination of germ-free animals on the other side of the textile-barrier (simulating a properly worn mask). Of relevance, all mice protected with textiles remained germ-free after two sprays (inoculation dose: >600 bacterial droplet units per 56.75cm2) compared to the contamination of mice not protected by a textile (0/12 vs 6/6, Fisher`s exact, p<0.0001). In a second phase of the experiment with 12 germ-free mice exposed again to 10-fold more droplets remained germ-free, while 100% of mice ...Continue Reading

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Mentioned in this Paper

Genome-Wide Association Study
Immune Effector Cell
Inflammatory Disorder
Chronic Inflammation
Study of Epigenetics
Inflammatory Bowel Diseases
Crohn Disease
Genotype Determination
Gene Mutant

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