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PubMed1997

[Chancroid in Algeria: the status of this sexually transmitted disease in 1995].

Absent for several decades, the chancroid reappeared in Algeria in 1988. In the unique department of Dermatology and Venereology of the University Hospital of the country of Tlemcen (more than 700,000 inhabitants), we wanted to know the state of this STD seven years after the report of the first cases. The file of the consulting patients were examined. We looked for the principal characteristics of this STD: age, sex, incubation period, place infection contact, type of relation, clinical presentation, evolution without and with treatment, other associated STD (syphilis, HIV). From August 1988 (1st case) to December 1995, 144 cases of chancroid were collected = 1988: 6, 1989: 5, 1990: 7, 1991: 18, 1992: 11, 1993: 33, 1994: 48, 1995: 16. The presentation is quite stereotyped; it concerns males only, singles in must cases, having had sexual relations with prostitutes. The incubation period is short (less than 10 days), the characteristic ulceration presents, very often, some adenopathies. The treatment by cotrimoxazole is efficient. They are no concomitant syphilis or HIV infection. The chancroid is the first cause of genital ulceration in the world. Since 1991, it is the principal STD in our department. It spreads within a male population, young singles associated with prostitutes. It is well installed in Algeria, and its role, although minor, in the transmission of the HIV infection, should not be neglected.

Adolescent↗
PubMed1998

Is HIV/STD control in Jamaica making a difference?

OBJECTIVE: To assess the impact of the comprehensive HIV/STD Control Program established in Jamaica since the late 1980s on the HIV/AIDS epidemic. METHODS: AIDS case reports, HIV testing of blood donors, antenatal clinic attenders (ANC), food service workers, sexually transmitted disease (STD) clinic attenders, female prostitutes, homosexuals and other groups were used to monitor the HIV/AIDS epidemic. Primary and secondary syphilis and cases of congenital syphilis were also monitored. National knowledge, attitude and practice (KAP) surveys were conducted in 1988, 1989, 1992, 1994 and 1996. RESULTS: The annual AIDS incidence rate in Jamaica increased only marginally in the past three years from 18.5 per 100000 population to 21.4 in 1997. HIV prevalence in the general population groups tested has been about 1% or less. Among those at high risk, HIV prevalence rates have risen to 6.3% (95% confidence interval 5.0-8.0) in STD clinic attenders, around 10% and 21% in female prostitutes in Kingston and Montego Bay respectively and approximately 30% among homosexuals. Syphilis rates and congenital syphilis cases have declined. The proportion of men aged 15-49 years reporting sex with a non-regular partner declined from 35% in 1994 to 26% in 1996 (P< 0.001). Women ever having used condoms increased from 51% in 1988 to 62.5% in 1992 and 73% in 1994 and 1996 (P< 0.001), while condom use with a non-regular partner increased from 37% in 1992 to 73% in 1996 (P= 0.006). Condom use among men was high over the period: around 81% had ever used condoms and 77% used them with non-regular partners. Gay men, inner-city adults and adolescents aged 12-14 years all reported increases in condom use while condom sales and distribution increased from around 2 million in 1985 to 10 million in 1995. CONCLUSION: HIV/STD control measures appear to have slowed the HIV/AIDS epidemic in Jamaica, however a significant minority of persons continue to have unprotected sex in high risk situations.

Adolescent↗
PubMed1977

Sero-epidemiological study of Lymphogranuloma venereum in Western Nigeria.

A sero epidemiological study involving 5009 individuals resident in the two largest cities (Ibadan and Benin) in the Western Region of Nigeria has been carried out, using the LGVCFT to determine the presence of LGV antibodies. These individuals come from various population groups and social classes (i.e. blood donors, antenatal clinic patients, general out-patients, venereal diseases clinic patients and prostitutes). Among the 3638 subjects tested in Ibadan, the seroreactivity rates ranged from 5.3% to 11.5%, while of the 1371 in Benin, the seroreactivity ranged from 7.3% to 18.3%. The seroreactivity rates confirm previous suspicion that there is a considerable reservoir of infection among the female population both in normal women and in prostitutes. While the value of LGVCFT as an epidemiological tool in the estimation of latent or active infection in a community has been substantiated, a puzzling variation in the endemicity of the LGV agent, even within the same region, has been observed. It is suggested that routine testing of blood donors and antenatal women with LGVCFT such as done with serological tests for syphilis should be carried out in tropical countries where LGV is endemic.

Complement Fixation Tests↗
PubMed1999

Mixed genotypes infection with hepatitis D virus.

Heterogeneity of hepatitis C viral (HCV) genomes results in escape from immune clearance. Super-infection or mixed infection of different genotypes of HCV are seen commonly in humans. Hepatitis D virus (HDV) is classified into 3 genotypes. This study was planned to investigate if mixed genotypes infection of HDV occurs in humans. HDV genotyping based on restriction fragment length polymorphism (RFLP) was used to screen 60-99 HDV clones from each case of 7 prostitutes and 11 patients. Mixed infections were diagnosed by the finding of two or more different RFLP patterns in a case and were confirmed by sequencing. Five prostitutes had mixed infections of genotypes IIa and IIb HDV, while only 2 patients had mixed infections of genotypes I and II HDV (P< 0.05). The heterogeneity in nucleotide sequence was generally below 2% among HDV quasi-species from the same subject, while the heterogeneity was 27.7% between genotypes I and II HDV, and 22.8% between genotypes IIa and IIb HDV from a subject with mixed infection. Multiple HDV clones from the spouses of the 2 index cases were also analyzed. One spouse had mixed infection and the other did not, corresponding to the index cases. In cases with mixed genotypes infections, the prevalence of the minor strain was less than 10% of the total colony population analyzed.

Adult↗
PubMedDate not supplied

Long distance truck drivers in India: HIV infection and their possible role in disseminating HIV into rural areas.

In this study, a large number of truck drivers were found to be having sex with the prostitutes in rural areas along the highways of India. Some were having sex with men also. HIV/AIDS awareness and condom use was poor among them. Three out of 302 truck drivers were found to be infected with HIV. The truck drivers could play an important role in the spread of the infection in rural India.

Adolescent↗
PubMed1994

AIDS in Thailand: a medical student's perspective.

Acquired Immunodeficiency Syndrome (AIDS) has become the biggest problem facing the health profession of Thailand today. The Ministry of Public Health reports that there are 400,000 individuals in Thailand already infected with the Human Immunodeficiency Virus (HIV) and is predicting that 4 million will be infected by the year 2000. This explosive epidemic first occurred among intravenous drug abusers (IVDAs) and subsequently spread to other high risk groups, especially prostitutes. The heterosexual population was next affected. The AIDS problem in Thailand was seen close-up by this writer, then a fourth year medical student, studying during an international health elective. At all three hospitals where I worked, I encountered large numbers of AIDS related admissions. Ten percent of medical beds at a Bangkok hospital were occupied by patients with AIDS related problems. In comparison, two hospitals located in the northern province of Chiang Mai had 15-20% and 30-40% of their beds occupied by patients with AIDS complications. Opportunistic infections were the primary reason for admissions. This paper describes the current AIDS epidemic in Thailand and the preventive measures being undertaken to combat it. Strategies to combat AIDS focus on preventive measures. The current program in Thailand emphasizes AIDS education and awareness, the promotion of condom usage, decreasing needle sharing, the screening of donated blood, and the development of the GP160 vaccine. The program, however, has been undermined by the country's well organized sex industry. Without a clear commitment from the Thai government, Thailand faces serious health and economic consequences from this epidemic in the coming decade.

Acquired Immunodeficiency Syndrome↗
PubMedDate not supplied

A model for HIV in Asia.

A model is proposed in which the spread of HIV/AIDS in the community is mainly due to the sexual interaction between a core group of female prostitutes and young unmarried males. Several threshold parameters are obtained that determine persistence of endemic proportions, persistence of total population, and the persistence of infective population given the extinction of endemic proportions in a population tending to infinity. Conditions are given for the existence of multiple endemic equilibria as well as the existence of multiple stable equilibria with separatrix and their asymptotic behavior and biological significance are discussed. In all cases, global analysis is accompanied by bifurcation diagrams, and numerical examples are provided for some particular cases of interest. This model was proposed with the recent rapid growth of the HIV/AIDS epidemic in Asia in mind.

Acquired Immunodeficiency Syndrome↗
PubMed1990

Alcohol, AIDS risks and commercial sex: some preliminary results from a Scottish study.

During 1988 self-report data were elicited from a study of 102 male and 103 female sex workers (prostitutes) in Edinburgh. Respondents were contacted by 'snowballing', mostly in licensed premises. This was reflected by high levels of self-reported alcohol and illicit drug use. Respondents reported that both alcohol and illicit drug use were commonplace in relation to their work and that many of their clients were under alcohol or drug effect at the time of contact. Condom use was unrelated to sex workers' alcohol or drug use, but was significantly associated with sex workers' assessments of the proportions of their clients also under the influence of illicit drugs.

Acquired Immunodeficiency Syndrome↗
PubMed1994

Slower heterosexual spread of HIV-2 than HIV-1.

Because of the similar virological properties of HIV types 1 and 2, HIV-2 was assumed to be as infectious and capable of inducing AIDS as HIV-1. Seroepidemiological studies have shown significant rates of HIV-2 infection in West Africa, and surveys from other regions of the world indicate that the spread of HIV-2 infection continues. However the pathogenic potential of HIV-2 is considered to be lower than that of HIV-1. It is therefore important to understand the transmission properties of HIV-2 and its contribution to the AIDS pandemic. Since 1985, we have prospectively studied 1452 registered female prostitutes in Dakar, Senegal, with sequential evaluation of their antibody status to HIV-1 and HIV-2. During the study the overall incidence of HIV-1 and HIV-2 was the same (1.11 per 100 person-years of observation [pyo]). However, the annual incidence of HIV-1 increased substantially: there was a 1.4-fold increased risk per year and thus a 12-fold increase in risk over the entire study period. The incidence of HIV-2 remained stable, despite higher HIV-2 prevalence. In our population the heterosexual spread of HIV-2 is significantly slower than that of HIV-1, which strongly suggests differences in the viruses' infectivity potential.

Adult↗
PubMed1995

HIV-specific cytotoxic T-cells in HIV-exposed but uninfected Gambian women.

A crucial requirement in the rational design of a prophylactic vaccine against the human immunodeficiency virus (HIV) is to establish whether or not protective immunity can occur following natural infection. The immune response to HIV infection is characterized by very vigorous HIV-specific cytotoxic T-lymphocyte (CTL) activity. We have identified four HIV-1 and HIV-2 cross-reactive peptide epitopes, presented to CTL from HIV-infected Gambians by HLA-B35 (the most common Gambian class I HLA molecule). These peptides were used to elicit HIV-specific CTLs from three out of six repeatedly exposed but HIV-seronegative female prostitutes with HLA-B35. These women remain seronegative with no evidence of HIV infection by polymerase chain reaction or viral culture. Their CTL activity may represent protective immunity against HIV infection.

Acquired Immunodeficiency Syndrome↗
PubMed1997

Sexual networks in Uganda: casual and commercial sex in a trading town.

A longitudinal study of the sexual behaviour of high-risk men and women living in a trading town on the trans-Africa highway showed that distinct sexual networks operated within the town. Forty-eight prostitutes kept daily records for 6 months of all their sexual contacts including the occupation and place of residence of each client and the price paid. Details of 4573 sexual contacts of the women were recorded. Three classes of women were identified: (1) 20 "high-class' women who charged a mean price of over US $4/- per contact. The majority of their clients were from large urban areas of Uganda (55%) or neighbouring countries (32%)-70% were truck-drivers or their mates; (2) 18 "low-class' women, charging an average of US $0.4 per contact, who were patronized predominantly by men resident in the town (71%) who were unskilled casual workers (58%); (3) 10 women fell into an intermediate category in terms of price and the residence of their clients. Thirty-eight male potential clients were recruited in low-cost bars where some of the women worked. They provided similar details of their daily sexual contacts. All were resident in the town and 22 had occupations which were classified as unskilled. Of the 1621 sexual contacts recorded by the men 25% were with new partners.

Adult↗
PubMed1997

Sexual relationships, condom use and risk perception among female bar workers in north-west Tanzania.

This paper discusses the background characteristics, sexual relationships, condom use and risk perception of bar workers in Magu district, north-west Tanzania. Bar workers in Magu are geographically mobile. They are not highly educated but probably have a higher level of schooling than average. They are mostly unmarried or divorced. They choose bar work because, given the resources available, it provides them with a good balance between earning their own income and being independent. Although the women are still partially dependent on the financial support provided by sexual partners and sexual relations tend to be based on exchange, bar workers cannot simply be equated with prostitutes. Some have a regular partner and the odd casual partner while others may have large numbers of casual contacts. Regular partners are almost always married and often itinerant. The distinction between regular and casual partners is important and based on the nature and extent of financial support. It is also related to condom use and therefore to risk. Women claim to be able to demand condom use from casual partners but not from regular partners. Although women claim that regular partners can be trusted, they nonetheless admit feeling at risk of AIDS and STDs from these same partners.

Adolescent↗
PubMed1998

Genetic subtypes of HIV type 1 and HIV type 2 strains in commercial sex workers from Bamako, Mali.

In Africa the highest HIV infection rate has been reported among female commercial sex workers (CSWs) who are at increasing risk of acquiring and transmitting HIV infection. In October 1995, 176 CSWs were studied in Bamako, the capital city of Mali. The ages of the CSWs ranged from 15 to 50 years old (mean, 28.8 years). Only 20.45% of the 176 CSWs were Malian; the majority were from Nigeria (32.9%) and Ghana (31.8%), and the remaining were from other African countries. Forty-one percent were active for less than 1 year as a commercial sex worker, and the length of prostitution for the remaining women ranged from 1 to 15 years (mean, 2.76). A total of 81 (46.02%) of the 176 CSWs were positive for HIV antibodies; 63 (35.8%) were HIV-1 positive, (3.9%) were HIV-2 positive, 11 (6.2%) had antibodies to HIV-1 and HIV-2, and none of them had antibodies to group O viruses. For all HIV antibody-positive samples, PBMCs were separated and genetic subtypes of HIV-1 were determined using the heteroduplex mobility assay (HMA), with ED5-ED12 as outer and ES7-ES8 as inner primers. Among the 66 HIV-1 strains characterized, 53 (80.3%) were subtype A, 2 (3.1%) belonged to subtype C, 1 (1.5%) belonged to subtype D, and 10 (15.1%) were identified as subtype G. Among the 10 subtype G strains, 8 were obtained from women who were very recent CSWs, with an activity of 1 year or less, assuming that there is a high probability that these infections occurred recently. Genetic subtypes of five HIV-2 viruses were determined by sequencing of the env and/or gag genes followed by phylogenetic analysis, and all of them belonged to subtype A. Comparison of HIV-1 and HIV-2 seroprevalence data from our study with previous data from Mali shows a significant rise in HIV-1 prevalence and a significant decrease in HIV-2 prevalence and confirms similar trends observed in neighboring countries. We have found four different genetic subtypes of HIV-1; however, subtype A is predominant and accounts for 80% of the cases and 15% of the HIV-1 infections were subtype G. It is important to continue the surveillance of subtypes on a systematic basis in order to see to what extent the proportions of the different subtypes will change over time.

Adolescent↗
PubMedDate not supplied

Social context of human immunodeficiency virus transmission in Africa: historical and cultural bases of east and central African sexual relations.

The literature relating to the social context of sexual relations in East and Central Africa has several implications for the heterosexual transmission of human immunodeficiency virus (HIV). Colonially created cities in the region still discriminate economically and socially against women. Rapid urbanization is occurring, but migrants maintain strong ties with rural areas. Traditional attitudes towards marriage and sexuality affect urban behavior in the extent of marital stability, the frequency of polygyny, and the emotional bond between spouses. Ethnic groups in Kampala and Nairobi exemplify the cultural foundations of two forms of sexual relations found in the region, one characterized by prostitution and the other by small circles of interchanging lovers. The first results in a more rapid spread of HIV through the urban population and outwards into rural areas. Each pattern exerts unique constraints on behavioral change and requires different prevention campaigns.

Africa, Central↗
PubMed1996

The challenge of HIV prevention among high-risk adolescents.

This article reports findings from an exploratory study of HIV knowledge and risk behaviors among 60 teenagers and young men engaged in the street life of Hollywood, California. The sample was composed largely of youths of homosexual or bisexual orientation who were substance abusers, prostitutes, or both. The data suggest that although community-based education efforts may be associated with lower-risk behavior among this population, the overall risk profiles of these socially marginalized youths remained high. Inferences are drawn about the cofactors of risk that must be addressed and the education needed to enhance the health prospects of these youths.

Adolescent↗
PubMed1993

Non-ulcerative sexually transmitted diseases as risk factors for HIV-1 transmission in women: results from a cohort study.

OBJECTIVES: The heterosexual spread of HIV-1 is occurring at different rates in different parts of the world. The transmission probability of HIV-1 per sexual contact is low, but may be greatly enhanced by several cofactors. Sexually transmitted diseases (STD), especially genital ulcers, may be such factors. So far, epidemiological evidence that other STD facilitate HIV-1 transmission is weak. The objective of this study was to determine whether treatable STD enhanced sexual transmission of HIV-1 in a cohort of female prostitutes in Kinshasa, Zaire. METHODS: We conducted a nested case-control study of 431 initially HIV-1-negative women followed prospectively for a mean duration of 2 years (with monthly STD check-ups and 3-monthly HIV-1 serology). Cases (seroconverters, n = 68) were compared with controls (women who remained HIV-1-negative, n = 126) for incidence of STD and sexual exposure during the presumed period of HIV-1 acquisition. RESULTS: The annual incidence of HIV-1 in this cohort was 9.8%. Seroconverters were younger than HIV-1-negative women (mean age, 24.6 versus 26.8 years; P = 0.04). During the period of HIV-1 acquisition, cases had a much higher incidence of gonorrhoea, chlamydial infection and trichomoniasis, and engaged in unprotected sex with clients and partners more frequently than controls. After controlling for sexual exposure by multivariate analysis, adjusted odds ratios for seroconversion were 4.8 [95% confidence interval (CI), 2.4-9.8] for gonorrhoea, 3.6 (95% CI, 1.4-9.1) for chlamydial infection and 1.9 (95% CI, 0.9-4.1) for trichomoniasis. Genital ulcers were more frequent in cases than controls, but much less common than other STD. CONCLUSION: Non-ulcerative STD were risk factors for sexual transmission of HIV-1 in women, after controlling for sexual exposure. Because of their high prevalence in some populations, non-ulcerative STD may represent a considerable population-attributable risk in the transmission of HIV-1 worldwide. The identification of treatable STD as risk factors for HIV-1 transmission offers an important additional strategy for the prevention of HIV/AIDS.

Adolescent↗
PubMed1997

Adolescent boys in Gujarat, India: their sexual behavior and their knowledge of acquired immunodeficiency syndrome and other sexually transmitted diseases.

We assessed the sexual behavior patterns of 368 unmarried, sexually active adolescent boys (294 rural, 74 urban) and their knowledge of sexually transmitted diseases (STDs) and correct use of condoms. The mean knowledge score for STDs was low and significantly associated with educational level (p < .0001). The mean awareness score for correct use of condoms was 0.42 on a scale of 10 and significantly associated with employment status and age at first coitus (p < .001). There was a negative correlation (-0.17) between literacy and knowledge of correct use of condoms. Selection of the first sexual partner, usually a prostitute, was influenced by employment status, age at first coitus, and literacy level. These data suggest that sexually active adolescent boys in Gujarat, India are inadequately prepared to protect themselves against STDs and, therefore, that it is imperative to impart to them some knowledge of safe sex.

Acquired Immunodeficiency Syndrome↗
PubMed1999

Sexually transmitted diseases and condom use among female freelance and brothel-based sex workers in Singapore.

BACKGROUND AND OBJECTIVES: Most studies in Asia exclude freelance female sex workers because of difficulties in access and the illegality of their work. Data are lacking on their risk behaviors. GOAL: To compare sexually transmitted disease (STD) rates, condom use, and health screening behavior between freelance and brothel-based sex workers in Singapore. STUDY DESIGN: This is a cross-sectional survey of 111 free-lance sex workers arrested from November 1996 to March 1997 for illicit prostitution and 333 randomly selected brothel-based sex workers. All were tested for STDs. RESULTS: STDs were significantly more prevalent among freelance than brothel-based sex workers (34.8% vs. 24.0%). Inconsistent condom use was significantly higher among freelance than brothel-based sex workers and was significantly associated with younger age, decreasing number of clients, and perception of non-condom use among peers. CONCLUSION: Educational programs to promote condom use should target freelance sex workers and their clients.

Adult↗