title: Bacterial spores survive electrospray charging and desolvation.
abstract: The survivability of Bacillus subtilis spores and vegetative Escherichia coli cells after electrospray from aqueous suspension was tested using mobility experiments at atmospheric pressure. E. coli did not survive electrospray charging and desolvation, but B. subtilis did. Experimental conditions ensured that any surviving bacteria were de-agglomerated, desolvated, and electrically charged. Based on mobility measurements, B. subtilis spores survived even with 2,000-20,000 positive charges. B. subtilis was also found to survive introduction into vacuum after either positive or negative electrospray. Attempts to measure the charge distribution of viable B. subtilis spores using electrostatic deflection in vacuum were inconclusive; however, viable spores with low charge states (less than 42 positive or less than 26 negative charges) were observed.
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Sara N
authors.initials: SN
authors.lastname: Pratt
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Austin
mesh_terms: D001274:Atmospheric Pressure; D001412:Bacillus subtilis / Q000254:growth & development / Q000502:physiology*; D001422:Bacterial Adhesion; D055664:Electrochemical Techniques / Q000295:instrumentation; D004926:Escherichia coli / Q000254:growth & development / Q000502:physiology; D050296:Microbial Viability; D008954:Models, Biological; D009330:Nebulizers and Vaporizers; D012997:Solvents / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000295:instrumentation; D013171:Spores, Bacterial; D055672:Static Electricity; D013499:Surface Properties; D014618:Vacuum; D014835:Volatilization
chemical_list: D012997:Solvents