Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 19, Number 3—March 2013
Dispatch

Tuberculosis Outbreak in a Primary School, Milan, Italy

Marino Faccini, Luigi Ruffo Codecasa, Giorgio Ciconali, Serafina Cammarata, Catia Rosanna Borriello, Costanza De Gioia, Alessandro Za, Andrea Filippo Marino, Valentina VighiComments to Author , Maurizio Ferrarese, Giovanni Gesu, Ester Mazzola, and Silvana Castaldi
Author affiliations: Author affiliations: Prevention Department ASL Milano, Milan, Italy (M. Faccini, G. Ciconali, S. Cammarata, C.R. Borriello, C. De Gioia); Azienda Ospedaliera Ospedale Niguarda Cà Granda, Milan (L.R. Codecasa, M. Ferrarese, G. Gesu, E. Mazzola); University of Milan Postgraduate School of Public Health, Milan (A. Za, A.F. Marino, V. Vighi, S. Castaldi); Fondazione IRCCS Ca’ Granda Ospedale Maggiore, Milan (S. Castaldi)

Main Article

Table

Distribution of prevalence rates of TB and LTBI among current and former students at primary school, Milan, Italy, 2011*

Class No. students No. (%) undergoing TST No. (%) TST positive†
Total no. (%) active TB cases‡
First test Second and third tests Total positive
First year 162 161 (99.4) 3 (1.9) 0 3 (1.9) 1 (0.6)
Second year 174 172 (98.9) 47 (27.3) 3 (1.7) 50 (29.1) 5 (2.9)
Third year 170 170 (100) 11 (6.5) 0 11 (6.5) 0
Fourth year 156 156 (100) 30 (19.2) 3 (1.9) 33 (21.2) 2 (1.3)
Fifth year 151 149 (98.7) 57 (38.3) 2 (1.3) 59 (39.6) 4 (2.7)
Former fifth year§ 156 156 (100) 29 (18.6) ND 29 (18.6) 3 (1.9)
Transferred
20
13 (65)
3 (23.1)
ND
3 (23.1)
0
Total 989 977 (98.8) 180 (18.4) 8 (0.8) 188 (19.2) 15 (1.5)

*Because a delay of 8–10 weeks after exposure is necessary for a positive skin test, follow-up screening was performed for students whose initial test occurred <10 weeks after exposure. TB, tuberculosis; LTBI, latent TB infection; TST, tuberculin skin test; ND, not done because initial screening was >10 weeks after exposure.
†At the first screening, 3 students refused to submit to TST; 11 refused at the second, and 11 at the third.
‡All other infections were LTBI.
§Those who were fifth-year students during the previous school year.

Main Article

Page created: January 30, 2013
Page updated: January 30, 2013
Page reviewed: January 30, 2013
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external