title: Report of two cases of influenza virus A/H1N1v and B co-infection during the 2010/2011 epidemics in the Italian Veneto Region.
abstract: From October 2010 to April 2011, in the Italian Veneto Region, 1403 hospitalized patients were tested for influenza virus infection by specific real time RT-PCR. Overall, 327 samples were positive for either influenza A (75%) or B (25%) viruses. Among these positive patients two resulted co-infected by A/H1N1v and B viruses. Even though co-infection with both influenza A and B viruses appears to be a rare event, it occurs naturally and may play a role in epidemiology and pathogenicity. In the present study the two co-infected patients were a transplant recipient immunocompromised adult and a child displaying a severe respiratory illness. The co-infection was confirmed by inoculation of the nasopharyngeal swabs in MDCK.2 cells, followed by immunofluorescence and real time RT-PCR assays. Moreover, in the case of the adult patient, the immune system response against both viruses was assayed by hemoagglutination inhibition test against reference influenza virus strains. Both patients fully recovered from infection, without significant differences with mono-infected patients.
authors: Department of Histology, Microbiology and Medical Biotechnologies, Division of Microbiology and Virology, University of Padova, Via A, Gabelli 63, Padova 35121, Italy.
authors: Arianna
authors: A
authors: Calistri
authors: Cristiano
authors: C
authors: Salata
authors: Marina
authors: M
authors: Cosentino
authors: Samuele
authors: S
authors: Asnicar
authors: Elisa
authors: E
authors: Franchin
authors: Riccardo
authors: R
authors: Cusinato
authors: Monia
authors: M
authors: Pacenti
authors: Isabella
authors: I
authors: Donatelli
authors: Giorgio
authors: G
authors: Palù
mesh_terms: D000818:Animals; D002460:Cell Line; D060085:Coinfection / Q000821:virology*; D004285:Dogs; D006801:Humans; D016867:Immunocompromised Host; D007223:Infant; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000302:isolation & purification*; D009981:Influenza B virus / Q000235:genetics / Q000302:isolation & purification*; D007251:Influenza, Human / Q000175:diagnosis* / Q000821:virology*; D007558:Italy; D008297:Male; D008875:Middle Aged; D009305:Nasopharynx / Q000821:virology; D060888:Real-Time Polymerase Chain Reaction; D014180:Transplantation; D014776:Virus Cultivation