Estimating the prevalence of chronic infections among asymptomatic migrants: results of a screening programme in Catalonia, Spain.

Background: Migrants are disproportionately affected by several infectious diseases differing the risk within migrant groups. This study aimed to estimate the prevalence of six chronic infections in asymptomatic migrants attended at primary care or specialized units where health assessments are offered.

Methods: A multicentric cross-sectional study was conducted to estimate the prevalence of human immunodeficiency virus (HIV), hepatitis B and C virus, spp, and infections in the migrant population who participated in a screening programme implemented at six primary health care centres, and two infectious diseases outpatient clinics in Catalonia, Spain.

Evaluation of the accuracy of a multi-infection screening test based on a multiplex immunoassay targeting imported diseases common in migrant populations.

Background: We aimed to evaluate the performance of a novel multiplex serological assay, able to simultaneously detect IgG of six infections, as a screening tool for imported diseases in migrants.

Methods: Six panels of 40 (n = 240) anonymized serum samples with confirmed infections were used as positive controls to assess the multiplex assay's sensitivity. One panel of 40 sera from non-infected subjects was used to estimate the seropositivity cutoffs, and 32 non-infected sera were used as negative controls to estimate each serology's sensitivity and specificity.