A mass flow of air through open stomata on leaves  could internalize floating aerosol-sized particles including bacteria and viruses. Such aerosols can disperse long distances from sources. Fattal et al.  detected aerosolized enteric bacteria and viruses as far as 730 m downwind of wastewater sprinkler irrigated field plots (note that the authors did not attempt detection at greater than 730 m). Gottwald et al.  concluded that in the spread of citrus canker, the pathogenic bacteria could be dispersed as an aerosol, in leaf debris, or wind-driven rainfall more than 5 miles by a single severe rainstorm.
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