title: Occurrence of a case of influenza A(H1N1)pdm09 and B co-infection during the epidemic season 2012-2013.
abstract: We report the detection of one case of co-infection with influenza A(H1N1)pdm09 and B, occurred during the 2012-2013 influenza season in Sicily. The dual infection was identified in a 18-year-old boy, who was not covered by specific vaccination and who had no other pre-existing risk factors. He presented classical symptoms of influenza-like illness developing no respiratory complications. A(H1N1)pdm09 viral concentration was initially about 10-fold higher than B virus, whereas its clearance was more rapidly achieved than in the case of B virus infection. Although influenza co-infection appears to be a rare event, a continued influenza surveillance activity is recommended, in order to evaluate diversity and evolution, but also to support public health prevention measures.
authors: Department of Sciences for the Health Promotion and Mother-Child Care "G. D'Alessandro" - Hygiene section, University of Palermo, Palermo, Italy. Electronic address: fabio.tramuto@unipa.it.
authors: Fabio
authors: F
authors: Tramuto
authors: Department of Sciences for the Health Promotion and Mother-Child Care "G. D'Alessandro" - Hygiene section, University of Palermo, Palermo, Italy. Electronic address: carmelo.maida@unipa.it.
authors: Carmelo Massimo
authors: CM
authors: Maida
authors: Azienda Sanitaria Provinciale di Palermo, Italy. Electronic address: franco.magliozzo@alice.it.
authors: Francesco
authors: F
authors: Magliozzo
authors: Department of Sciences for the Health Promotion and Mother-Child Care "G. D'Alessandro" - Hygiene section, University of Palermo, Palermo, Italy. Electronic address: emanuele.amodio@unipa.it.
authors: Emanuele
authors: E
authors: Amodio
authors: Department of Sciences for the Health Promotion and Mother-Child Care "G. D'Alessandro" - Hygiene section, University of Palermo, Palermo, Italy. Electronic address: francesco.vitale@unipa.it.
authors: Francesco
authors: F
authors: Vitale
mesh_terms: D000293:Adolescent; D060085:Coinfection / Q000235:genetics / Q000821:virology; D062665:Epidemiological Monitoring; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D009981:Influenza B virus / Q000235:genetics / Q000302:isolation & purification*; D007251:Influenza, Human / Q000821:virology*; D008297:Male; D008969:Molecular Sequence Data; D012802:Sicily
keywords: Co-infection; Influenza A(H(1)N(1))pdm09; Influenza B; Influenza-like illness