Study of the prevention and control campaign for the hepatitis A outbreak in men who have sex with men in Seville (2016–2018)

Osuna, María Concepción Galdeano; Fuentes, María Baca; Navajo, Beatriz Jiménez; Porras-Povedano, Miguel

doi:10.1016/j.vacune.2022.10.006

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…The high proportion of non-immunized individuals, along with high-risk sexual behaviours involving highly interconnected groups, were the main triggers for the European outbreak [ 11 ], which was initiated following the EuroPride festival celebrated in Amsterdam [ 26 ]. The decline in the cumulative incidence throughout 2017 and 2018 occurred due to several reasons: a decrease in the proportion of susceptible individuals in groups at higher risk of infection; a strengthening in the promotion of vaccination among MSM, along with a prioritization of vaccination in this specific group (especially important in the context of the vaccine shortage in 2017); and numerous health education campaigns launched through websites and apps [ 27 , 28 ].…”

Section: Discussionmentioning

confidence: 99%

Epidemiological Characteristics and Spatio-Temporal Distribution of Hepatitis A in Spain in the Context of the 2016/2017 European Outbreak

Guerrero-Vadillo

Peñuelas

Domı́nguez

et al. 2022

IJERPH

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The aim of our study was to describe the results of the epidemiological surveillance of hepatitis A infections in Spain in the context of the 2016/2017 European outbreak, particularly of hepatitis A outbreaks reported in the MSM population, incorporating the results of a spatio-temporal analysis of cases. Hepatitis A cases and outbreaks reported in 2016–2017 to the National Epidemiological Surveillance Network were reviewed: outbreaks in which some of the cases belonged to the MSM group were described, and clusters of hepatitis A cases in men and women were analysed using a space–time scan statistic. Twenty-six outbreaks were identified, with a median size of two cases per outbreak, with most of the outbreak-related cases belonging to the 15–44 years-old group. Nearly 85% occurred in a household setting, and in all outbreaks, the mode of transmission was direct person-to-person contact. Regarding space–time analysis, twenty statistically significant clusters were identified in the male population and eight in the female population; clusters in men presented a higher number of observed cases and affected municipalities, as well as a higher percentage of municipalities classified as large urban areas. The elevated number of cases detected in clusters of men indicates that the number of MSM-related outbreaks may be higher than reported, showing that spatio-temporal analysis is a complementary, useful tool which may improve the detection of outbreaks in settings where epidemiological investigation may be more challenging.

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