{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T17:44:29Z","timestamp":1791308669895,"version":"4.3.1"},"reference-count":44,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2013,5,22]],"date-time":"2013-05-22T00:00:00Z","timestamp":1369180800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Medical Virology"],"published-print":{"date-parts":[[2013,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:label\/><jats:p>Very little is known about JCV infection and genotype distribution with respect to the different demographic and clinical characteristics of the Italian population. A cross\u2010sectional study was carried out on the prevalence of JCV genotypes in 323 Caucasian subjects (mean age: 37.5 years, range: 2\u201370 years). Urine samples from 200 immunocompromised patients, including patients affected by Multiple Sclerosis (MS), Human Immunodeficiency Virus (HIV), colon cancer, inflammatory diseases and Progressive Multifocal Leukoencephalopathy (PML), and 123 immunocompetent individuals were tested by quantitative real time PCR. Sequencing of the JCV viral protein 1 (VP1) and transcriptional control region (TCR) was performed. In this series, the overall prevalence of JCV excretion was 32.8% without significant differences between males and females. JCV was detected in 39.5% of patients and in 22% of healthy individuals (<jats:italic>P<\/jats:italic>\u2009=\u20090.004). The most prevalent JCV genotype excreted was genotype 1 (69.8%), followed by genotype 2 (22.6%) and genotype 4 (7.5%). Distribution of genotypes between patients and healthy subjects showed a statistically significant difference for the type 1 compared to the other variants (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.01). Of note, JCV genotype 2 was found to be associated to young patients (<jats:italic>P<\/jats:italic>\u2009=\u20090.0001) and to patients treated with immunomodulator drugs (<jats:italic>P<\/jats:italic>\u2009=\u20090.0001), but not to PML subjects. The non\u2010pathogenic archetype IIS (singular, insert) form was present in all JCV strains detected. This result allows to hypothesize a possible JCV genotype selection in response to pressure by immunomodulatory drugs. <jats:bold><jats:italic>J. Med. Virol. 85:1286\u20131292, 2013<\/jats:italic>.<\/jats:bold> \u00a9 2013 Wiley Periodicals, Inc.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jmv.23585","type":"journal-article","created":{"date-parts":[[2013,5,22]],"date-time":"2013-05-22T17:43:18Z","timestamp":1369244598000},"page":"1286-1292","source":"Crossref","is-referenced-by-count":17,"title":["Molecular epidemiology of <scp>JCV<\/scp> genotypes in patients and healthy subjects from Northern Italy"],"prefix":"10.1002","volume":"85","author":[{"given":"Nunzia","family":"Zanotta","sequence":"first","affiliation":[{"name":"Institute for Maternal and Child Health IRCCS \u201cBurlo Garofolo\u201d Trieste Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Serena","family":"Delbue","sequence":"additional","affiliation":[{"name":"Health Science Foundation \u201cEttore Sansavini\u201d Ravenna 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