Biohazard in air-conditioning systems installed in health facilities

  • Antonella Giorgio Dipartimento di Biologia, Università degli Studi di Napoli Federico II
  • Marco Guida Dipartimento di Biologia, Università degli Studi di Napoli Federico II
  • Michele del Gaudio INAIL- Avellino
  • Carmine Piccolo Azienda Ospedaliera San Giuseppe Moscati Avellino
  • Armando Masucci Azienda Ospedaliera San Giuseppe Moscati Avellino
  • Grazia Memmolo INAIL Direzione Territoriale di Avellino
  • Ernesto Russo INAIL Contarp Direzione Regionale per la Campania
Keywords: Air Quality; microbiology; maintenance.

Abstract

The project "Biological hazard related to the operation of air-conditioning systems in sanitary environments in the province of Avellino" has had, as its main objective, the microbiological monitoring of the environments hospitals in order to evaluate the microbiological quality of the air, through procedures and criteria for sampling the environmental microbial flora. This procedure aims to assess and manage risks related to the hygiene of air treatment plants (UTA), which must be periodically subjected to checks, maintenance, cleaning and sanitisation in order to protect the health of Workers according to technical standards and national guidelines. Most important was the characterisation at the level of species and gender of the main microbiological contaminants present within the samples investigated. The entire trial was carried out on a temporal scale taking into account the frequency of the UTA maintenance activities and thus establishing the monitoring plan. In order to assess the effectiveness of the maintenance plan and the efficiency of the actions of sanitizations, withdrawals should be made at three different times or immediately after ordinary maintenance, halfway between the first and second Maintenance and immediately before the second maintenance. This way you can monitor the presence of different bacterial contaminants in time. The quantitative and qualitative analysis of bacteria, pathogens and not, in hospital environments aims to prevent the onset and spread of pathologies.
In particular, the monitoring of air handling units is of fundamental importance since such plants can cause the diffusion of many pollutants, coming from outside or inside, resulting from residues of materials from Construction, from remnants of plant and animal origin (pigeons, mice, insects) or moulds and bacteria that can contaminate the water and the surfaces inside the aeraulic plants. The molecular-based taxonomic characterization of the most representative species in the test specimens has as its main purpose the identification of any "sentinel" markers as well as indicators of biohazard.

References

Conferenza Stato-Regioni sulla "Valutazione e gestione dei rischi correlati all'igiene degli impianti di trattamento aria", redigendo una specifica Procedura Operativa. 2013

• M. del Gaudio. “Trattamento dell’aria negli ambienti di lavoro: definita la nuova procedura per l’igiene. Ambiente & Sicurezza Il Sole 24 ore. 2013; (7) 27-28.

• Agodi A, Auxilia F, Barchitta M, Cristina ML, D'Alessandro D, Mura I, Nobile M, Pasquarella C, Italian Study Group of Hospital Hygiene. Operating theatre ventilation systems and microbial air contamination in total joint replacement surgery: results of the GISIO-ISChIA study. J Hosp Infect. 2015 Jul;90(3):213-9. doi: 10.1016/j.jhin.2015.02.014. Epub 2015 Mar 27.

Caggiano Giuseppina, Christian Napoli, Caterina Coretti, Grazia Lovero, Giancarlo Scarafile, Osvalda De Giglio, Maria Teresa Montagna. Mold contamination in a controlled hospital environment: a 3-year surveillance in southern Italy. BMC Infectious Diseases 2014, 14:595 http://www.biomedcentral.com/1471-2334/14/595.

• Cesira Pasquarella, Licia Veronesi, Christian Napoli, Paolo Castiglia, Giorgio Liguori, Rolando Rizzetto, Ida Torre, Elena Righi, Patrizia Farruggia, Marina Tesauro, Maria V. Torregrossa, Maria T. Montagna, Maria E. Colucci, Francesca Gallè, Maria D. Masia, Laura Strohmenger, Margherita Bergomi, Carola Tinteri, Manuela Panico, Francesca Pennino, Lucia Cannova, Marialuisa Tanzi and SItI Working Group Hygiene in Dentistry. Microbial environmental contamination in Italian dental clinics: A multicenter study yielding recommendations for standardized sampling methods and threshold values. Science of the Total Environment 420 (2012) 289–299.

• Coroneo V, Marras L, Desogus A, Orano MT, Cocco ME, Schintu M. Microbiological environmental monitoring in high-risk departments during building activities in a hospital site. Ann Ig. 2016 Nov-Dec;28(6):432-440. doi: 10.7416/ai.2016.2125.

• Guilarte Y.N., R. Tinguely, A. Lupo, A. Endimiani Prevalence and characteristics of fluoroquinolone-resistant Aerococcus urinae isolates detected in Switzerland Int J Antimicrob Agents, 43 (2014), pp. 474-475

• Linee guida INAIL Ed. 2010. Il monitoraggio microbiologico negli ambienti di lavoro. Campionamento e analisi.

• Pailan S, Gupta D, Apte S, Krishnamurthi S, Saha P. Degradation of organophosphate insecticide by a novel Bacillus aryabhattai strain SanPS1, isolated from soil of agricultural field in Burdwan, West Bengal, India. Int Biodeterior Biodegrad. 2015;103:191–5.

• Seyed Hamed Mirhoseini, Mahnaz Nikaeen, Hossein Khanahmad, Maryam Hatamzadeh, Akbar Hassanzadeh. Monitoring of airborne bacteria and aerosols in different wards of hospitals – Particle counting usefulness in investigation of airborne bacteria. Annals of Agricultural and Environmental Medicine 2015, Vol 22, No 4, 670–673.

• Yan Y, Zhang L, Yu MY, Wang J, Tang H, Yang ZW, et al. The genome of Bacillus aryabhattai T61 reveals its adaptation to Tibetan Plateau environment. Genes Genom. 2016;38(3):293–301.

• Yasukawa K., Z. Afzal, P. Mbang, C.E. Stager, D.M. Musher Aerococcal infection at three US Tertiary Care Hospitals South Med J, 107 (2014), pp. 642-647.

Published
2019-12-18