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Aznar, Esteban; Casas, Inmaculada; González Praetorius, Alejandro; Ruano Ramos, María José; Pozo, Francisco; Sierra Moros, María José; García Rivera, María Victoria; Sánchez Sánchez, Azucena; García Villacieros, Elena; Saravia, Gabriela; Iglesias-Caballero, María; Román Marcos, Elena; García San Miguel, Lucía
Euro surveillance : bulletin européen sur les maladies transmissibles, 02/2023, Volume: 28, Issue: 8Journal Article
In autumn 2022, the Spanish Influenza National Reference Laboratory (NRL) confirmed the detection of influenza A(H5N1) in samples from two asymptomatic workers linked to an outbreak in a poultry farm in Spain. Nasopharyngeal swabs were taken according to a national screening protocol for exposed workers. Absence of symptoms, low viral load and negative serology in both workers suggested environmental contamination. These findings motivated an update of the early detection strategy specifying timing and sampling conditions in asymptomatic exposed persons.
