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Studies to detect HCV RNA in semen seminal fluid and cells , vaginal secretions, cervical smears, and saliva have yielded mixed results. What is the prevalence of HCV infection in monogamous heterosexual partners? Seven of the 12 genotype-concordant couples were further analyzed by sequence analysis of the hypervariable region of E2 envelope region of the HCV genome and only 3 couples had highly homologous viral strains that were consistent with a transmission event. HCV-positive individuals in longer-term monogamous relationships need not change their sexual practices. Studies varied in the completeness of risk ascertainment in partners, and many failed to carefully exclude HCV acquisition from nonsexual sources: The accumulated epidemiologic evidence indicates that HCV can be transmitted by sexual contact but much less efficiently than other sexually-transmitted viruses, including hepatitis B virus and human immunodeficiency virus HIV. Additionally, there may be an absence of suitable target cells in the genital tract to allow infection to occur or infection may require the presence of abnormal mucosa.
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The key research questions relate to identifying the specific factors that promote or prevent sexual transmission of HCV. In persons engaged in higher-risk sexual behaviors, those with HIV infection were more likely to be anti-HCV positive odds ratio, 2. To be informative, such studies must include detailed virological analyses of antibody- and genotype-concordant sexual partners and perform complete ascertainment of nonsexual sources of HCV. Sexual transmission has been evaluated in different populations of HCV-infected individuals. Early studies used first-generation antibody to HCV anti-HCV assays which have a higher false positive rate than second- and third-generation assays. Current recommendations about sexual practices are different for persons with chronic HCV infection who are in steady monogamous partnerships versus those with multiple partners or who are in short-term sexual relationships. The incidence of new HCV infections among individuals who are at risk for sexually transmitted diseases is higher than in monogamous heterosexual couples.
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What is the prevalence of HCV infection in monogamous heterosexual partners? The key research questions relate to identifying the specific factors that promote or prevent sexual transmission of HCV. These factors are consistent with a sexual route of transmission. In the more informative studies, genotyping was used to evaluate antibody-concordant couples. How prevalent is the risk factor of sexual activity in acute hepatitis C? The insights gained by addressing these specific questions will allow more detailed future recommendations for HCV-infected persons and their sexual partners and ultimately lead to interventions that may reduce the risk of transmission of HCV through sexual contact.
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Description:These factors are consistent with a sexual route of transmission. While there is sufficient evidence to support the conclusion that sexual transmission of HCV occurs, quantifying the magnitude of an individual's risk of HCV acquisition by sexual contact is more difficult. However, even this method may not be perfect because the exclusion of couples in which the partner is already infected may leave a more selected and less representative population of sexual partnerships for follow-up. The key research questions relate to identifying the specific factors that promote or prevent sexual transmission of HCV. The insights gained by addressing these specific questions will allow more detailed future recommendations for HCV-infected persons and their sexual partners and ultimately lead to interventions that may reduce the risk of transmission of HCV through sexual contact. What factors increase the risk of HCV transmission by sexual contact? The mode of transmission was ascertained by carefully questioning the infected individual to exclude nonsexual sources of HCV.

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