Autor: |
Cason C; Department of Medical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy., Monasta L; Institute for Maternal and Child Health-IRCCS 'Burlo Garofolo', Via dell' Istria 65/1, 34137, Trieste, Italy., Zanotta N; Institute for Maternal and Child Health-IRCCS 'Burlo Garofolo', Via dell' Istria 65/1, 34137, Trieste, Italy., Campisciano G; Institute for Maternal and Child Health-IRCCS 'Burlo Garofolo', Via dell' Istria 65/1, 34137, Trieste, Italy., Maestri I; Department of Experimental and Diagnostic Medicine, Pathology Unit of Pathologic AnatomyHistology and Cytology University of Ferrara, Via Luigi Borsari 46, 44121, Ferrara, Italy., Tommasino M; Infections and Cancer Biology Group, International Agency for Research on Cancer, Cours Albert Thomas 150, 69372, Lyon, France., Pawlita M; German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany., Villani S; Department of Biomedical, Surgical & Dental Sciences, University of Milano, Via Pascal 36, 20100, Milan, Italy., Comar M; Department of Medical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy.; Institute for Maternal and Child Health-IRCCS 'Burlo Garofolo', Via dell' Istria 65/1, 34137, Trieste, Italy., Delbue S; Department of Biomedical, Surgical & Dental Sciences, University of Milano, Via Pascal 36, 20100, Milan, Italy. serena.delbue@unimi.it. |
Abstrakt: |
Human polyomaviruses (HPyVs) asymptomatically infect the human population establishing latency in the host, and their seroprevalence can reach 90% in healthy adults. Few studies have focused on the pediatric population, and there are no reports regarding the seroprevalence of all the newly isolated HPyVs among Italian children. Therefore, we investigated the frequency of serum antibodies against 12 PyVs in 182 immunocompetent children from Northeast Italy, by means of a multiplex antibody detection system. Additionally, secondary lymphoid tissues were collected to analyze the presence of HPyV DNA sequences using a specific real-time PCRs or PCRs. Almost 100% of subjects were seropositive for at least one PyV. Seropositivity ranged from 3% for antibodies against simian virus 40 (SV40) in children from 0 to 3 years, to 91% for antibodies against WU polyomavirus (WUPyV) and HPyV10 in children from 8 to 17 years. The mean number of PyV for which children were seropositive increased with the increasing of age: 4 standard deviations (SD) 1.8 in the 0-3-year group, 5 (SD 1.9) in the 4-7-year group, and 6 (SD 2.2) in the 8-17-year group. JC polyomavirus (JCPyV) DNA was detected in 1% of the adenoids, WUPyV in 12% of the tonsils, and 28% of the adenoids, and Merkel cell polyomavirus (MCPyV) was present in 6 and 2% of the tonsils and adenoids, respectively. Our study gives new insights on the serological evidence of exposure to PyVs during childhood, and on their possible respiratory route of transmission. |