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At least 19 recordsLinked to original sources

PubMed1991

Sexual partners, penetrative sexual partners and HIV risk.

This paper argues that the notion of sexual partners per se is insufficient for estimating levels of HIV risk behaviour or changes in HIV risk over time, even though it is a crucial element of most epidemiological models of HIV. The concept of a penetrative sexual partner (PSP) is introduced as a considerably more accurate measure of HIV risk. Using data from a longitudinal study of 930 homosexually active men in England and Wales, this paper demonstrates that variation in numbers of PSPs (and thus HIV risk) is not related to variation in the gross numbers of sexual partners.

Adolescent↗

PubMed1989

Sexual behaviour of injecting drug users and associated risks of HIV infection for non-injecting sexual partners.

The sexual behaviour of 142 clients of syringe-exchange schemes was measured using a questionnaire interview based survey method. Two to four months later the questionnaire was repeated to provide measures of behavioural change. The majority of these clients were sexually active, 77% having one or more sexual partners in the 3 months prior to the first interview. Many of these clients (46% of those sexually active) had sexual partners who did not inject drugs. There is evidence that this group modified their sexual behaviour towards reducing their own risk of HIV infection, with more having no sexual partners (from 23% to 31%), a reduction in those having multiple partners (from 26% to 21%) and a slight increase in those with regular partners (from 49% to 52%). Not all clients in this group reduced their risk of infection by modifying their sexual behaviour. Some clients continued to engage in high risk sexual behaviour, having multiple partners (21%) and not using condoms (79%). Whilst overall there is evidence of changes in the sexual behaviour of the clients towards a reduced risk of infection, we have identified an associated increase in risk of transmission from them to their sexual partners. Drug injectors who continued to have sexual partners were more likely to have sexual partners who did not inject drugs.

Adult↗

PubMed1991

Treatment failure of genital condylomata acuminata in women: role of the male sexual partner.

The male sexual partners of women with genital condylomata acuminata are thought to be carriers of human papillomaviruses. It is therefore often recommended that both sexual partners be treated. We studied 360 women with genital warts to test the hypothesis that when the male partners of women with condylomata acuminata are treated, the treatment failure rate decreases. The male sexual partners of 180 of these women were examined and, if indicated, treated (treatment group). The 180 remaining male sexual partners were neither examined nor treated (control group). One hundred twenty-two (68%) men in the treatment group had human papillomavirus-associated lesions. The treatment failure rate of women was 16.7% in the treatment group and 18.9% in the control group. The difference is not statistically significant (p greater than 0.05). The results of this study do not support the hypothesis that the treatment failure rate of women with condylomata acuminata decreases if their male sexual partners are also treated.

Adolescent↗

PubMed1988

Human papillomavirus--a study of male sexual partners.

Male sexual partners of a cohort of women with genital-tract abnormalities which were associated with human papillomavirus infection were examined for evidence of infection with human papillomavirus. Of the 214 male partners who were examined, 93.5% had visible genital lesions. Of the 196 lesions that were biopsied, 72.5% showed histological evidence of infection with human papillomavirus, and only 20.4% of subjects with histological evidence of human papillomavirus were aware of a lesion. An unexpectedly high proportion (6.1%) of lesions on which a biopsy was performed, particularly those with flat, red, indurated morphology, also showed histological evidence of penile intraepithelial neoplasia. This was not significantly more common among the partners of the women with cervical intraepithelial neoplasia than it was among the partners of the women with other evidence of genital human papillomavirus infection. Penile intraepithelial neoplasia was significantly (P less than 0.001) more common among subjects with no history of non-genital warts. We conclude that the male partners of women with human papillomavirus-associated lesions are very likely to be infected with human papillomavirus, and thus may act as a significant reservoir for the reinfection of their female partners. As the awareness of human papillomavirus-associated lesions was low among the male partners, colposcopic examination and treatment of their male partners, and/or barrier contraception, may be a necessary part of the management of women who are undergoing treatment for human papillomavirus-associated genital disease.

Adult↗

PubMed1988

Subclinical human papillomavirus infections in male sexual partners of female carriers.

The male sexual partners of 156 women with human papillomavirus infection of the cervix uteri were examined. In 120 men (77 per cent) penile lesions were found on examination of the penis via a colposcope (peniscopy) the most common of which were flat acetowhite lesions (53 per cent). Predilection sites of lesions were the urethral meatus and the corona glandis (23 and 19 per cent of the lesions, respectively). Using filter in situ hybridization human papillomavirus-deoxyribonucleic acid was found in penile smears of 61 men (39 per cent). The cancer-associated viral types (human papillomavirus 16 and 18) were identified in 75 per cent of the human papillomavirus positive men. Viral types of sexual partners were identical in 87 per cent. The correlation between infections with human papillomavirus 16 and 18, and the severity of the cervical lesion was significant in corresponding sexual partners. Our results support the hypothesis that male sexual partners represent a risk factor by acting as a reservoir for genital infections with papillomaviruses. The majority of human papillomavirus infections are of subclinical character. They require sensitive diagnostic techniques, such as peniscopy and hybridization for their identification. Detection and treatment of subclinical human papillomavirus infection in men may be important for the prevention of genital cancer in women.

Adult↗

PubMedDate not supplied

Anaerobic vaginosis: study of male sexual partners.

One hundred male sexual partners of women with anaerobic vaginosis (AV) were screened for the presence of sexually transmitted diseases (STD). Thirty male partners had evidence of non-gonococcal urethritis (NGU), compared to 5 in the control group (P less than 0.05). Chlamydia trachomatis was isolated from 14 male partners, compared to 3 in the control group. Forty-five male partners required treatment for STDs, compared to 11 in the control group (P less than 0.02). Nine (40%) male partners with chlamydia-negative NGU were successfully treated with metronidazole alone while 10 required Deteclo in addition. There was no significant association between Bacteroides ureolyticus and chlamydia-negative NGU. Screening of male partners resulted in the treatment of STDs in 62 additional patients who would have otherwise not received treatment. The results suggest that examination of male partners of women with AV results in an increased yield of STD diagnoses.

Bacteria, Anaerobic↗

PubMed1992

Women with multiple sexual partners: united states, 1988.

Women who have multiple sexual partners in a short time period are appropriate targets for sexually transmitted disease (STD) prevention. We analyzed survey data collected in 1988 from a nationally representative sample of 8450 American women aged 15 to 44 to identify markers of such behavior. Among sexually active persons, 0.4% of married women and 8.4% of unmarried women had two or more sexual partners in the 3 months preceding the interview; unmarried marital status, early age at first sexual intercourse, lack of religious affiliation, and young age were associated with this behavior. All except young age were predictive after multivariate analysis. Such factors may help define women at elevated STD risk and allow better targeting of STD prevention.

Adolescent↗

PubMedDate not supplied

Choice of sexual partner according to rate of partner change and social class of the partners.

Models for the spread of sexually transmitted diseases, including AIDS, rely on sexual partner mixing patterns in the population. From data acquired through partner notification for infection with Chlamydia trachomatis among young people in Gothenburg, Sweden, it was possible to construct contact matrices for the variables 'rate of partner change' and 'social class' of the partners in pair formations. These matrices show a restricted mixing between these two variables for young heterosexual women. Therefore random mixing models will probably overestimate rate of spread and possibly final size of an epidemic of a sexually transmitted disease.

Adolescent↗

PubMed1990

The significance of sexual partner contact networks for the transmission dynamics of HIV.

The paper provides a brief review of the significance of heterogeneity in sexual behaviour to the transmission dynamics of HIV and the spread of AIDS. It addresses the formulation of mathematical models to encapsulate variability in the rate of sexual partner change, the structure of networks of sexual partner contact, and age dependency in sexual activity. A particular focus is the significance of high or low preference (or choice) of sexual partners from an individual's own sexual activity class (defined on the basis of partner change rate or other criteria). Numerical studies of model behaviour reveal that a high degree of assortativeness (high level of "like with like" mixing) results in a more rapid initial spread of HIV, a smaller overall epidemic, and the possibility of a multipeak or long and drawn out epidemic, by comparison with those induced by high degrees of disassortativeness (low level of "like with like" mixing) in sexual contact patterns. The structure of a sexual network is shown to be a major determinant of the temporal pattern and magnitude of an epidemic. The demographic impact of HIV in developing countries is also examined in the context of choice matrices based on age as well as sexual activity. The potential demographic impact of AIDS is shown to be enhanced by age dependency in levels of activity (high in the young and lower in older age classes), a male preference for females of younger age, and a higher efficiency of HIV transmission from male to female than vice versa. The paper ends with a discussion of the need for better quantitative data on sexual behaviour.

Adult↗

PubMed1986

Factors affecting seropositivity to human T cell lymphotropic virus type III (HTLV-III) or lymphadenopathy associated virus (LAV) and progression of disease in sexual partners of patients with AIDS.

Fifty four sexual partners of homosexual men with the acquired immune deficiency syndrome (AIDS) were studied, of whom 32 were seropositive and 22 seronegative for human T cell lymphotropic virus type III or lymphadenopathy virus (HTLV-III/LAV) antibody, which showed that repeated exposure by anal intercourse does not necessarily lead to seroconversion. Seropositivity to HTLV-III/LAV was not associated with the absolute number of sexual partners, receptive anal intercourse, or the use of recreational drugs, but was associated with a history of other sexually transmitted diseases (STDs), particularly in the year preceding the patient's initial examination. Acquisition of an STD after the date of last sexual contact with a person with AIDS was strongly associated (p less than 0.001) with the development of persistent generalised lymphadenopathy (PGL). Concurrent or recent STDs would seem to be an important cofactor in developing antibody to HTLV-III/LAV and in the progression of infection from a person being asymptomatic to having PGL.

Acquired Immunodeficiency Syndrome↗

PubMedDate not supplied

Itraconazole in the treatment of vaginal candidosis and the effect of treatment of the sexual partner.

The efficacy of itraconazole in the treatment of vaginal candidosis and the effect of treatment of the sexual partner were evaluated. Women received 100 mg of itraconazole daily for five days. The sexual partners of one-half of the women were treated with the same dosage of itraconazole; the other men received placebo. Study design was double blind. Sexual relations were discontinued during treatment. On day 0 and day 30 after initiation of treatment, laboratory values were determined. At 30 days, 14% of the women whose sexual partners had received placebo and none of those whose sexual partners had received itraconazole had relapsed. These differences, however, were not statistically significant.

Adolescent↗

PubMedDate not supplied

HIV-infected men's practices in notifying past sexual partners of infection risk.

The researchers studied the self-reported practices of men infected with the human immunodeficiency virus (HIV) in Los Angeles concerning notifying past sexual partners of their risk of infection. The sample of 111 men consisted of 87 Hispanics, 14 whites, 9 blacks, and 1 Asian. Ninety-three percent identified themselves as homosexual or bisexual, and 13 percent reported having injected a nonprescription drug. Seventy-five percent had tested HIV seropositive within the previous 8 months. Subjects were asked about notifying sexual partners with whom they had contact in the 12-months before the subject tested HIV seropositive. Of the 111 subjects, 39 (35 percent) reported that they had attempted to inform 1 or more past partners. Of those who attempted, 30 subjects (76.9 percent) reported notifying at least 1 partner. Overall, the 111 subjects reported a total of 926 individual sexual partners during the 12 months; 51 partners (5.5 percent) were informed of their risk by the subjects. A multivariate logistic regression analysis indicated that those with the most past sexual partners were least likely to attempt to notify any partner. The same inverse relationship was obtained for actual notification and may stem in part from the greater frequency of nonidentifiable partners among those reporting many encounters. The extent and quality of posttest counseling regarding partner notification was not assessed. However, rates of attempted notification were nonsignificantly higher among those who received private professional counseling, who belonged to a support group, or who received social support from family or friends. The data suggest that without concerted and culturally appropriate counseling, many HIV infected persons do not attempt to notify past sexual partners of their risk.

Adolescent↗

PubMed1992

Age-dependent choice of sexual partners and the transmission dynamics of HIV in Sub-Saharan Africa.

A mathematical model of the transmission of HIV-1 within heterosexual populations in Sub-Saharan Africa is described and its properties analysed. The model incorporates epidemiological and demographic processes and extends previous work in this area via the inclusion of age and sex dependency in rates of sexual partner change, and sexual partner choice dependent on age. Parameter assignments are made on the basis of current data on the transmission dynamics of HIV-1 and the demography of human populations in Africa. Both age-dependent rates of sexual activity and the sexual contact of males with females younger than themselves act to enhance the predicted demographic impact. With realistic parameter values, the model suggests AIDS is able to reverse the sign of population growth rates from positive to negative values over a timescale of a few decades. The sensitivity of this prediction is examined in relation to changes in the pattern of sexual contact between different age classes of females and males, different patterns of change in the age-dependent rate of sexual partner change, different assumptions concerning the doubling time of the epidemic in its early stages, and the relative efficiencies of viral transmission between men and women, and vice versa. The impact AIDS is predicted to have on the number of young and elderly persons as a fraction of the number of productive adults (the dependancy ratio) is examined under various assumptions concerning the weighting to be applied to mirror the burden imposed by the care of those with AIDS. The paper includes an assessment of the influence of the timing of changes in sexual behaviour, or the promotion of the use of condoms, on the predicted course of the epidemic. The paper concludes with a discussion of data needs and the model refinements required to more accurately mirror current understanding of the epidemiology of HIV-1.

Acquired Immunodeficiency Syndrome↗

PubMed1990

Does the treatment of genital condylomata in men decrease the treatment failure rate of cervical dysplasia in the female sexual partner?

Three hundred ninety women treated for cervical dysplasia by local tissue ablation were studied retrospectively to test the hypothesis that the treatment failure rate is lower if the male sexual partner is also treated. In 190 cases, the male sexual partner was examined and treated successfully for genital condylomata. Controls were 200 women treated during the same time period and closely matched to the study group regarding age, race, socioeconomic status, histologic grade of dysplasia, distribution of the lesions, and methods of therapy, but the male partner was neither examined nor treated. The treatment failure rate for women whose partners were also treated was not significantly different from that for women whose partners were not treated (6.8 versus 7.5%; P greater than .05), suggesting that treating genital condylomata in men does not affect the failure rate of cervical dysplasia in female sexual partners.

Adult↗

PubMed1987

High prevalence of papillomavirus-associated penile intraepithelial neoplasia in sexual partners of women with cervical intraepithelial neoplasia.

To determine whether neoplastic cervical lesions in women are associated with papillomavirus infections in their sexual partners, we used a colposcope to examine male sexual partners of women with cervical flat condyloma (294 cases) or cervical intraepithelial neoplasia (186 cases), before and after 5 percent acetic acid was applied to the penis and the anogenital area. Condylomata acuminata, papules, and macules were observed in 309 of the 480 men (64.4 percent). In 204 of them (42.5 percent), macules or slightly elevated papules were detected only after application of acetic acid. Condylomata acuminata or lesions showing histologic features of condyloma were found in 121 partners (41.2 percent) of women with condyloma, but in only 10 partners (5.4 percent) of women with cervical intraepithelial neoplasia. Penile lesions showing histologic features of intraepithelial neoplasia were found in 61 partners (32.8 percent) of women with cervical intraepithelial neoplasia, but in only 4 partners (1.4 percent) of women with flat condyloma. Thirty-six (60 percent) of the 60 macules or papules tested contained papillomavirus DNA sequences. Human papillomavirus types 16 and 33 were almost exclusively found in penile intraepithelial neoplasia. Type 6, type 11, and the recently recognized type 42 were found in lesions showing features of condyloma or minimal histologic changes. As yet uncharacterized papillomaviruses were found in 15 percent of the specimens. These data support the concept that cervical carcinomas and precancerous lesions in women may be associated with genital papillomavirus infection in their male sexual partners.

Adolescent↗

PubMed1987

Human immunodeficiency virus (HIV) infection in the regular sexual partners of homosexual men with AIDS and persistent generalised lymphadenopathy.

Thirty-five homosexual men who had been the regular sexual partners (for at least 6 months) of anti-HIV-positive patients with AIDS (N = 18) or PGL (N = 17) were studied. Twenty-one (60%) were seropositive, but 14 (40%) were consistently anti-HIV-negative. The duration of relationship with the index case was not statistically different in seropositive compared to seronegative partners; median 26 months (range 7-60) vs 30 months (range 7-60). However, seropositive partners had a significantly higher monthly number of other sexual partners and sexually transmitted diseases and a higher frequency of insertive and receptive anal intercourse in the preceding five years. The risk of acquiring HIV infection was significantly increased by frequent receptive anal intercourse when the frequency of insertive was controlled for but not the converse. Seronegative partners had undetectable antibodies by live and fixed cell immunofluorescence and by radioimmunoprecipitation and were repeatedly negative by competitive enzyme immunoassay. Furthermore, the sera of seronegative partners lacked HIV neutralising activity. Peripheral blood mononuclear cells (PBMCs) from seronegative partners, stained with monoclonal antibodies to seven different CD4 epitopes, revealed no differences when compared to those from heterosexual controls and no qualitative differences from cells from seropositive individuals. In addition, PBMCs from seronegative partners could be productively infected by HIV in vitro. If resistance to infection in seronegative partners exists, then it is likely that mechanisms other than a specific humoral immunity or CD4 polymorphisms are involved.

AIDS-Related Complex↗

PubMed1988

[Chlamydia trachomatis infection among sexual partners of the patients with non-gonococcal urethritis].

During the past 3 years, 30 sexual partners including 18 married couples and 12 extramarital sexual pairs whose male partners were diagnosed as having non-gonococcal urethritis were examined for Chlamydia trachomatis infection. Twenty-three of the 30 couples (76.7%) had identical results either positive or negative for Chlamydia trachomatis infection. All 3 male partners of the 3 pairs who had the non-identical results for Chlamydia trachomatis infection, male negative and female positive, had history of urethritis or prostatitis. Fourteen of the 17 female partners (82.4%) who were positive for Chlamydia trachomatis, had no subjective complaints. The above findings suggest the necessity of treating the female sexual partners of the non-gonococcal urethritis patients irrespective of their symptom.

Adult↗

PubMed1988

Sexual partner selectiveness effects on homosexual HIV transmission dynamics.

Deterministic simulation models are used to show that HIV transmission dynamics in homosexual populations can be strongly affected by sexual partner selectiveness. The type of selectiveness or biased mixing examined is where individuals with similar new partnership formation rates are more likely to form a pair than would be expected by chance. The effect of such selectiveness could be strong even when the total number and distribution of new sexual partnerships and sex acts remains constant. This means that in order to predict the future course of HIV transmission and identify the populations at highest risk, we must have information not only on the frequency of new sexual partnerships and types of sex acts, but also on who has sex with whom. Given high sexual partner selectiveness, some groups of homosexuals with low rates of sex and new sex partners would take many decades before a single introduction would generate an epidemic. Epidemics in these groups can be markedly accelerated by only modest contact with higher risk groups. Even in very low activity groups, which if isolated would have no epidemic, an important proportion of their members can be infected when they are not selective. The relative risks of AIDS in groups making high numbers of new sexual partnerships compared to groups making low numbers are markedly affected by sexual partner selectiveness. The models developed were examined using information collected in 1984 from the Coping and Change Study in collaboration with the Chicago Multicenter AIDS Cohort Study. This population was divided into activity groups by the rate at which individuals established new sexual partnerships and then a structure of new sexual partnerships between these activity groups was defined consistent with available data. Even without introducing any behavior change in the models, the proportion of the homosexual population infected was seen to level off temporarily at around 50% after several years as a consequence of saturation in the high risk groups when lower risk groups were not yet being consumed by the epidemic process. Most sex in the study population is casual or anonymous. The sample selection procedures were biased toward individuals who engage in such sex. There is, however, a large group of individuals that avoids the casual and anonymous sex scene. Simulated epidemics indicated that under a variety of conditions, the population that does not engage in casual and anonymous sex could experience an epidemic of HIV infection quite some time after the epidemic in the population that does has waned.(ABSTRACT TRUNCATED AT 400 WORDS)

Acquired Immunodeficiency Syndrome↗