Ricerc@Sapienza

An aerosol study was carried out in a test room measuring particulate matter (PM) with
an aerodynamic diameter smaller than 10, 4, 2.5 and 1 m (PM10, PM4, PM2.5, PM1) before and
during the use of electronic alternatives to tobacco cigarettes (EATC) IQOS®, GLO®, JUUL®, with
dierent kinds of sticks/pods, as well as during the smoking of a conventional tobacco cigarette.
The aerosol was mainly in the PM1 size range (>95%). All studied EATCs caused lower indoor PM1

Legionella spp. is a ubiquitous intracellular microorganism in aquatic environments both natural and artificial. Although Legionella pneumophila sg 1 and sg 6 are the main causes of disease, other species have recently been associated with cases of legionellosis. Since 2000, some international documents related to the control and prevention of Legionnaires’ disease have been issued, providing different environmental matrices’ sampling, but not for air. To date, the control on water mains is preferred; however, air sampling could be a useful tool for exposure evaluation.