Article Legionella Survey in the Plumbing System of a Sparse Academic Campus: A Case Study at the University of Perugia Ermanno Federici 1,*, Silvia Meniconi 2, Elisa Ceci 1, Elisa Mazzetti 2, Chiara Casagrande 1, Elena Montalbani 1, Stefania Businelli 3, Tatiana Mariani 3, Paolo Mugnaioli 3, Giovanni Cenci 1 and Bruno Brunone 2 1 Dipartimento di Chimica, Biologia e Biotecnologie, University of Perugia, 06123 Perugia, Italy;
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[email protected]; Tel.: +39-075-5857330 Received: 30 June 2017; Accepted: 29 August 2017; Published: 1 September 2017 Abstract: We have monitored the presence of bacteria belonging to the genus Legionella in the plumbing of buildings at the University of Perugia (Italy). More than 300 water samples were collected from 156 control-point taps in 41 buildings comprised in the eight campuses of the University. Legionella was absent in most samples, while it was found in only 12 buildings (29% of the total). Molecular analysis indicated the presence of L. pneumophila (serogroups 1, 8 and 6–10), L. taurinensis and L. anisa. In only three cases contamination levels were above the limit at which remedial actions are required, according to international guidelines.