Molecular Epidemiology of HIV-1 in Switzerland: Evidence for a Silent Mutation in the C2V3 Region Distinguishing Intravenous Drug Users From Homosexual Men
| Autor: | Peter Erb, Teresa M. Brown, Marcia L. Kalish, Thomas C. Stoeckli, Ingrid Steffen-Klopfstein |
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| Rok vydání: | 2000 |
| Předmět: |
Silent mutation
medicine.medical_specialty Referral Virus Acquired immunodeficiency syndrome (AIDS) Internal medicine Epidemiology Medicine Outpatient clinic Pharmacology (medical) Medical history Sida Prospective cohort study biology Molecular epidemiology business.industry virus diseases biology.organism_classification medicine.disease Infectious Diseases Heterosexuality Lentivirus Immunology Viral disease business Cohort study Demography |
| Zdroj: | JAIDS Journal of Acquired Immune Deficiency Syndromes. 23:58-67 |
| ISSN: | 1525-4135 |
| DOI: | 10.1097/00126334-200001010-00008 |
| Popis: | OBJECTIVES To study the molecular epidemiology of HIV-1 strains found in Switzerland and to determine possible genetic linkages among strains sorted by risk group or geographic region. DESIGN A cross-sectional, clinic-based survey of HIV-1 molecular sequences and linked patient history from Swiss people. METHODS Specimens were collected from 215 HIV-1-infected people in HIV outpatient clinics of four tertiary referral centers (Lausanne, St. Gallen, Zurich, and Basel) between May and August 1996, mainly from homosexual men, injecting drug users (IDU), and heterosexually infected people. In addition, specimens collected between 1991 and 1995 in the HIV outpatient clinic at University of Geneva were included into this survey. These specimens were collected primarily for an ongoing, prospective cohort (Swiss HIV Cohort Study). Direct C2V3C3 sequences of the env gene were determined from 158 samples of peripheral blood mononuclear cells. Genetic data were analyzed with the available patient history on each specimen. RESULTS As found in other previous studies in Europe, primarily subtype B viruses were identified, whereas seven (4%) of 158 were non-subtype B: one subtype D, four subtype A, and two subtype E. Five of seven non-B subtypes occurred in immigrants from African or Asian countries and all seven were found exclusively in individuals who had been infected by heterosexual contact. No significant clustering of strains within different study sites or risk groups was found. A silent mutation (LAI env 834) occurred significantly more often in IDU than in homosexual men (p |
| Databáze: | OpenAIRE |
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