title: An outbreak of HIV-1 subtype G among Italian injecting drug users.
abstract: We describe an outbreak of subtype G among injecting drug users (IDU) in northern Italy newly infected with HIV. We analysed pol gene sequences from samples of 139 individuals from different risk groups. Non-B subtypes were more frequently detected among IDU than in homosexual or heterosexual contacts. All G subtypes but one were found among IDU. The phylogenetic analysis indicated that the outbreak was of monophyletic origin and was caused by HIV-1 strains similar to those from western Africa.
authors.affiliation: Epidemiology Unit, Department of Infectious, Parasite and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Ciccozzi
authors.forename: Stefania
authors.initials: S
authors.lastname: Montieri
authors.forename: Marco
authors.initials: M
authors.lastname: Salemi
authors.forename: Tulio
authors.initials: T
authors.lastname: De Oliveira
authors.forename: Maria
authors.initials: M
authors.lastname: Dorrucci
authors.forename: Alessandro
authors.initials: A
authors.lastname: Sinicco
authors.forename: Andrea
authors.initials: A
authors.lastname: De Luca
authors.forename: Massimo
authors.initials: M
authors.lastname: Giuliani
authors.forename: Claudia
authors.initials: C
authors.lastname: Balotta
authors.forename: Giovanni
authors.initials: G
authors.lastname: Rezza
mesh_terms: D001483:Base Sequence; D004196:Disease Outbreaks; D005260:Female; D015751:Genes, pol / Q000235:genetics; D015658:HIV Infections / Q000150:complications / Q000453:epidemiology* / Q000235:genetics; D015497:HIV-1 / Q000145:classification / Q000235:genetics*; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008297:Male; D010802:Phylogeny; D011446:Prospective Studies; D019529:Sexuality; D015819:Substance Abuse, Intravenous / Q000150:complications / Q000453:epidemiology* / Q000235:genetics