An outbreak of chickenpox in an asylum seeker centre in Italy: outbreak investigation and validity of reported chickenpox history, December 2015-May 2016

An outbreak of chickenpox occurred between December 2015 and May 2016 among asylum seekers in a reception centre in Latium, Italy. We describe the epidemiological and laboratory investigations, control measures and validity of reported history of chickenpox infection. Serological screening of all re...

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Veröffentlicht in:Euro surveillance : bulletin européen sur les maladies transmissibles 2017-11, Vol.22 (46)
Hauptverfasser: Vairo, Francesco, Di Bari, Virginia, Panella, Vincenzo, Quintavalle, Giuseppe, Torchia, Saul, Serra, Maria Cristina, Sinopoli, Maria Teresa, Lopalco, Maurizio, Ceccarelli, Giancarlo, Ferraro, Federica, Valle, Sabrina, Bordi, Licia, Capobianchi, Maria Rosaria, Puro, Vincenzo, Scognamiglio, Paola, Ippolito, Giuseppe
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container_title Euro surveillance : bulletin européen sur les maladies transmissibles
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creator Vairo, Francesco
Di Bari, Virginia
Panella, Vincenzo
Quintavalle, Giuseppe
Torchia, Saul
Serra, Maria Cristina
Sinopoli, Maria Teresa
Lopalco, Maurizio
Ceccarelli, Giancarlo
Ferraro, Federica
Valle, Sabrina
Bordi, Licia
Capobianchi, Maria Rosaria
Puro, Vincenzo
Scognamiglio, Paola
Ippolito, Giuseppe
description An outbreak of chickenpox occurred between December 2015 and May 2016 among asylum seekers in a reception centre in Latium, Italy. We describe the epidemiological and laboratory investigations, control measures and validity of reported history of chickenpox infection. Serological screening of all residents and incoming asylum seekers was performed, followed by vaccine offer to all susceptible individuals without contraindication. Forty-six cases were found and 41 were associated with the outbreak. No complications, hospitalisations or deaths occurred. Serological testing was performed in 1,278 individuals and 169 were found to be susceptible, with a seroprevalence of 86.8%. A questionnaire was administered to 336 individuals consecutively attending the CARA health post to collect their serological result. The sensitivity, specificity and the positive and negative predictive value (PPV and NPV) of the reported history of chickenpox were 45.0%, 76.1%, 88.3% and 25.6%, respectively. We observed an increasing trend for the PPV and decreasing trend for the NPV with increasing age. Our report confirms that, in the asylum seeker population, chickenpox history is not the optimal method to identify susceptible individuals. Our experience supports the need for additional prevention and control measures and highlights the importance of national and local surveillance systems for reception centres.
doi_str_mv 10.2807/1560-7917.ES.2017.22.46.17-00020
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We describe the epidemiological and laboratory investigations, control measures and validity of reported history of chickenpox infection. Serological screening of all residents and incoming asylum seekers was performed, followed by vaccine offer to all susceptible individuals without contraindication. Forty-six cases were found and 41 were associated with the outbreak. No complications, hospitalisations or deaths occurred. Serological testing was performed in 1,278 individuals and 169 were found to be susceptible, with a seroprevalence of 86.8%. A questionnaire was administered to 336 individuals consecutively attending the CARA health post to collect their serological result. The sensitivity, specificity and the positive and negative predictive value (PPV and NPV) of the reported history of chickenpox were 45.0%, 76.1%, 88.3% and 25.6%, respectively. We observed an increasing trend for the PPV and decreasing trend for the NPV with increasing age. Our report confirms that, in the asylum seeker population, chickenpox history is not the optimal method to identify susceptible individuals. Our experience supports the need for additional prevention and control measures and highlights the importance of national and local surveillance systems for reception centres.</abstract><cop>Sweden</cop><pub>Centre Europeen pour la Surveillance Epidemiologique du SIDA (European Centre for the Epidemiological Monitoring of AIDS)</pub><pmid>29162209</pmid><doi>10.2807/1560-7917.ES.2017.22.46.17-00020</doi><oa>free_for_read</oa></addata></record>
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subjects Adult
Africa - ethnology
Arabs - statistics & numerical data
Chicken pox
Chickenpox - diagnosis
Chickenpox - epidemiology
Chickenpox Vaccine - administration & dosage
Disease Outbreaks - prevention & control
Disease Susceptibility
Epidemics
Female
Humans
Italy - epidemiology
Male
Political asylum
Refugees
Refugees - statistics & numerical data
Seroepidemiologic Studies
Surveillance and Outbreak Report
Syria - ethnology
Travel
Young Adult
title An outbreak of chickenpox in an asylum seeker centre in Italy: outbreak investigation and validity of reported chickenpox history, December 2015-May 2016
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