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Foundations for effective strategies to control sexually transmitted infections: voices from rural Kenya.

Achieving maximal benefit from clinic-based, sexually transmitted infection (STI) control strategies requires that persons seek treatment at public clinics. Community-based, ethnographic research methods were used to examine patterns of health-seeking behavior for sexually transmitted infections in western Kenya. Illness narratives of sexually transmitted infections provided the basis for an analysis of sequential steps in health-seeking behavior, namely recognition, classification, overcoming stigma, identification of treatment options and selection of a course of therapy. A variety of terms were used to identify STI, including multiple terms referring to "women's disease". The stigma associated with STI, reflected in the terminology, was based on a set of beliefs on the causes, contagiousness and sequelae of STI, and resulted in delays in seeking treatment. Five commonly used treatment options were identified, with multiple sources of care often used concurrently. The desire for privacy, cost and belief in the efficacy of traditional medicines strongly influenced health-seeking behaviour. A belief that sexually transmitted infections must be transmitted in order to achieve cure was professed by several respondents and promoted by a traditional healer. Implications for STI control strategies are derived, including the development of educational messages and the design of clinics.

Acquired Immunodeficiency Syndrome↗

Pelvic inflammatory disease: a review with emphasis on antimicrobial therapy.

Pelvic inflammatory disease accounts for 5%-20% of hospital admissions for gynecologic problems and is associated with health care costs of more than 1 billion dollars annually. This article reviews the epidemiology, polymicrobial etiology, and diagnosis of this disease state. Special consideration is given to in vivo and in vitro studies of antimicrobial therapy, including both established regimens and expanded-spectrum beta-lactam antibiotics. The adjunctive modalities reviewed include treatment of sexual contacts, removal of intrauterine devices, use of alternative contraceptive methods associated with a reduced risk of disease, and surgery. Although understanding of pelvic inflammatory disease has increased markedly, investigation of its various aspects is both necessary and ongoing. In particular, well-designed, controlled, comparative clinical trials of new treatment regimens must be performed to verify a true advantage of these therapies.

Adolescent↗

Cervical cancer risk and use of depot-medroxyprogesterone acetate in Costa Rica.

The relationship between cervical cancer and the use of depot-medroxyprogesterone acetate (DMPA) was examined in a nationwide case-control study in Costa Rica. Cases were women ages 25-58 years of age with invasive squamous cell cancer (N = 149) or carcinoma in situ (CIS, N = 415) reported by the National Tumor Registry during 1982-84. Controls (N = 764) were randomly selected during a nationwide household survey. Using logistic regression, we adjusted for known risk factors for cervical cancer. DMPA use was associated with a risk of CIS of 1.1 (95% confidence interval 0.6-1.8) and a risk of invasive cancer of 1.4 (95% confidence interval 0.6-3.1). The slightly elevated risks observed may be the result of chance or a detection bias. One limitation of this study is that few women had used DMPA for longer than two years.

Adult↗

Proportion of HIV infections attributable to other sexually transmitted diseases in a rural Ugandan population: simulation model estimates.

BACKGROUND: Unprotected heterosexual contact in the presence of other sexually transmitted diseases (STD) enhances the probability of HIV transmission. The objective of this study was to estimate the proportion of HIV infections attributable to STD in rural Uganda. METHODS: Simulation modelling scenarios of the transmission dynamics of HIV infection and of ulcerative and non-ulcerative STD were employed to address this objective, drawing on data from a specific rural population cohort of 10,000 in south-west Uganda. RESULTS: In simulations of the initial 10-year period of the HIV epidemic (1980-1990), over 90% of HIV infections were attributed to STD. Even given conservative assumptions about the prevalence of STD and about their enhancing effects on HIV transmission, STD played a critical role in the rapid and extensive spread of HIV infection. The role of STD decreased with progression of the HIV epidemic. CONCLUSIONS: In developing countries, control of the spread of HIV infection may benefit substantially from successful STD intervention programmes, and particularly in areas where HIV infection is not already well established.

Adolescent↗

Direct and indirect estimates of HIV-1 incidence in a high-prevalence population.

While the worldwide AIDS epidemic continues to expand, directly measured incidence data are difficult to obtain. Methods to reliably estimate human immunodeficiency virus type 1 (HIV-1) incidence from more easily available data are particularly relevant in those parts of the world where prevalence is rising in heterosexually exposed populations. The authors set out to estimate HIV-1 incidence in a population of heterosexual sexually transmitted disease clinic attendees in Trinidad who had a known high prevalence of HIV-1 subtype B. Over the period 1987-1995, HIV-1 incidence estimates from serial cross-sectional studies of HIV-1 prevalence, passive follow-up of clinic recidivists, modeling of early markers of HIV-1 infection (p24 antigen screening), and a cohort study of seronegative genital ulcer disease cases were compared. Measuring incidence density in the genital ulcer disease cases directly gave the highest estimate, 6.9% per annum. Screening for the detection of early HIV-1 markers yielded an incidence of 5.0% per annum, while estimating incidence from serial cross-sectional prevalence data and clinic recidivists gave estimates of 3.5% and 4.5% per annum, respectively. These results were found to be internally consistent. Indirect estimates of incidence based on prevalence data can give accurate surrogates of true incidence. Within limitations, even crude measures of incidence are robust enough for health planning and evaluation purposes. For planning vaccine efficacy trials, consistent conservative estimates may be used to evaluate populations before targeting them for cohort studies.

Blotting, Western↗

Why do homosexual men relapse into unsafe sex? Predictors of resumption of unprotected anogenital intercourse with casual partners.

OBJECTIVE: To assess predictors of relapse into unprotected anogenital intercourse with casual partners among homosexual men in Amsterdam, The Netherlands. DESIGN: A prospective study ongoing since October 1984. METHODS: Self-reported data on sexual behaviour were obtained at 12 semi-annual intervals. Participants who reported unprotected anogenital intercourse with casual partners at wave 12 but not at wave 11 were considered to have relapsed into unsafe sex (n = 47). Men who did not report unprotected anogenital intercourse at wave 11 or at wave 12 were considered to have maintained behaviour change (n = 197). RESULTS: Relapse into unsafe sex with casual partners occurred more frequently among men with a less positive attitude towards condom use, lower personal efficacy with respect to using condoms with casual partners, a weaker intention to avoid anogenital intercourse with casual partners and those who were not involved in a primary relationship. Intention to avoid anogenital intercourse with casual partners was related to an individual's attitude, normative beliefs and personal efficacy with respect to avoiding anogenital intercourse. CONCLUSIONS: In order to improve motivation it is important to support homosexual men in their personal decision-making process, which may be more resolute when the outcome is in accordance with individual preferences. Therefore, health education should be community-based and sensitive to individual needs.

Adult↗

AIDS knowledge, risk behaviors, and factors related to condom use among male commercial sex workers and male tourist clients in Bali, Indonesia.

OBJECTIVES: To describe the AIDS/sexually transmitted diseases (STD) knowledge and risk behaviors, and to determine factors related to condom use among male commercial sex workers (CSW) and male tourist clients in Bali, Indonesia. DESIGN: Individual survey interviews were conducted with a sample of 80 male CSW and 100 tourist clients in the Kuta area of Bali. METHODS: Survey interviews included detailed questions on AIDS/STD knowledge, sexual behavior, and psychosocial measures related to risk taking. RESULTS: Most of the male CSW had heard about AIDS and other STD, although some misconceptions about transmission and risks of different sexual practices remained. Both oral and anal intercourse with tourists were common and condom use was far from consistent. Factors related to condom use for anal intercourse with tourist clients were condom beliefs, self efficacy, susceptibility to STD infection, and STD knowledge. Tourist clients were mainly from Australia and Europe and many had paid for sex in other parts of Indonesia as well as in high prevalence countries. Knowledge of AIDS/STD was very good among the tourists and previous experience with STD was common. Factors related to condom use with male CSW were condom beliefs and self efficacy. CONCLUSION: There is a very active and mobile group of male CSW and tourist clients present in Bali. Interventions with these men are needed due to the low level of knowledge about AIDS among CSW, their experience with STD and STD symptoms, and their level of risky sexual behavior.

Acquired Immunodeficiency Syndrome↗

Bacterial vaginosis and HIV seroprevalence among female commercial sex workers in Chiang Mai, Thailand.

OBJECTIVE: To investigate the relationship between HIV seropositivity and bacterial vaginosis (BV) in a population at high risk for sexual acquisition of HIV. DESIGN: A cross-sectional study was conducted among 144 female commercial sex workers in Chiang Mai, Thailand. METHODS: The participants were tested for cervical gonorrhea and Chlamydia infection, syphilis, Trichomonas vaginitis, Candida vaginitis, BV, and HIV infection. BV was diagnosed by clinical criteria (pH > 4.5, positive amine test, and presence of clue cells) and using Gram stains. RESULTS: Thirty-three per cent of participants had BV, and 43% were HIV-positive. Using clinical criteria, the association of BV and HIV seropositivity was significant [odds ratio (OR), 2.7; 95% confidence interval (CI), 1.3-5.0]. Although the association between BV and HIV prevalence was not significant using Gram stains alone for diagnosis of BV, an association was found between abnormal vaginal flora and HIV (OR, 2.1; 95% CI, 1.0-4.8). In multiple logistic regression analysis, adjusting for age, number of sexual encounters per week, current condom use, and currently having a sexually transmitted disease (STD), both BV and a history of an STD were independently associated with HIV seropositivity (adjusted OR for BV, 4.0 and 95% CI, 1.7-9.4; adjusted OR for history of an STD, 6.9 and 95% CI, 2.1-22.9). CONCLUSIONS: When diagnosed clinically, BV is independently associated with HIV seroprevalence. HIV infection may promote abnormal vaginal flora, or BV may increase susceptibility to sexual transmission of HIV. Alternatively, the association seen here may result from intervening variables; in this case BV may be a marker or a cofactor of HIV transmission.

AIDS-Related Opportunistic Infections↗

Prostitutes are a major reservoir of sexually transmitted diseases in Nairobi, Kenya.

Prostitutes are a major reservoir of sexually transmitted diseases in many developing nations. In Nairobi we found that 16%, 28%, and 46%, respectively, of upper-, middle-, and lower-social strata prostitutes were infected with Neisseria gonorrhoeae. Genital ulcers and infections with Haemophilus ducreyi were more prevalent among prostitutes of the middle and lower social strata. A group of 97 prostitutes of the lower social strata were followed longitudinally to determine the rate of reinfection with N. gonorrhoeae. The mean time to acquisition of a new infection was 12.0 +/- 9.2 days. These results show that in Nairobi prostitutes are a readily identifiable group of high-frequency transmitters of gonococcal infection. Strategies based on intervention in the prostitute reservoir could prove to be an effective means of control of gonococcal infections in developing nations.

Chancroid↗

Hepatitis B infection among Chinese STD patients in Kuala Lumpur, Malaysia.

This study documents the prevalence of Hepatitis B serological markers among STD patients who have had multiple sexual partners in Kuala Lumpur, Malaysia, and compares the rates with those of a sample of the population with single or no sexual partners. A total of 336 Chinese STD patients (multiple partners group) and 234 Chinese control subjects (non-multiple partner group) were screened. Those with a history of blood transfusion or parenteral drug abuse had been excluded from the study, and all study subjects were heterosexuals. The overall carrier rate was 9.2% for the multiple partner group (MP group) and 6.8% for the non-multiple partner group (NMP group). Infection rates were 64.3% for the MP-group and 38.9% for the NMP group. After adjustments for age and sex, there was no significant difference in carrier rates between the two groups, but infection rates were significantly different with the MP group, being 3.2 times more likely to acquire infection than the NMP group. The study concludes that in heterosexuals, those with multiple sexual partners have increased chances of acquiring HBV infection.

Adolescent↗

Epidemiologic trends of sexually transmitted diseases in China.

OBJECTIVE: To describe the current epidemiology of sexually transmitted diseases (STDs), we analyzed the time trends in distribution of reported cases of STDs in China from 1989 to 1998. STUDY DESIGN: Based on the computerized database of the National System of STD Surveillance, a retrospective study of STD cases reported from 1989 to 1998 was carried out. RESULTS: From 1989 to 1998, STD incidence increased significantly in men and women and demonstrated nonlinear growth trends, with the exception of gonorrhea incidence. Between 1990 and 1998, the incidence increased more in females (4.20 times) than that in males (3.79 times). Syphilis incidence increased approximately 20 times during this period at an average annual rate of 52.7%. Gonorrhea incidence increased 2.6 times during this period at an average annual rate of 11.4%, which reached a plateau from 1994 to 1997. Extramarital transmission as source of STD infection has significantly increased from 1995 to 1998. CONCLUSION: The incidence of STDs has continued to increase in China from 1989 to 1998. The epidemic patterns are different from rates in developed counties in which behavior interventions have been successfully implemented, suggesting the need for active behavioral-intervention programs in China.

Adolescent↗

Immunologic profiles of HIV-infected and uninfected commercial sex workers in the Vellore region of Southern India.

Female commercial sex workers (CSW) play a major role in the transmission of HIV infection in India. Their immunology has not been characterized. To determine HIV-related immunologic changes and establish baseline data for CSW, blood cell counts and serum immunoglobulin levels of 35 HIV-positive, asymptomatic CSW; 37 HIV-negative CSW, and 35 age-matched, non-CSW, healthy women controls were compared. The CSW, irrespective of their HIV status, had abnormalities that included high eosinophil, lymphocyte, and CD8 counts and low CD4:CD8 ratios. The only significant difference between the HIV-positive and HIV-negative CSW was in their neutrophil and CD8 counts (p < 0.05, ANOVA). Compared with normal controls, the CSW had significantly elevated serum IgG, IgA, and IgM levels; however, no significant difference was shown between CSW who tested positive for HIV and those who did not. These results suggest that the CSW of Vellore region in Southern India have hyperimmunoglobulinemia irrespective of their HIV status and thus highlight the need to use appropriate controls when immunologic evaluation studies are done.

Adult↗

The secretory activity of the seminal vesicles and its relationship to sperm motility: effects of infection in the male reproductive tract.

In 146 males aged between 20 years and 40 years attending an infertility service, the secretory activity of the seminal vesicles was assessed by measurement of corrected seminal fructose concentration. This value was related to the presence of a positive semen culture, other evidence of inflammatory processes in the reproductive tract and sperm motility. Only 48% of subjects with a positive semen culture showed evidence of inflammation in the reproductive tract, as assessed by the presence of more than 20 white blood cells per high power field, and greater than 10% spermagglutination in the ejaculate. There was a relationship between the inflammatory process, hypofunction of the seminal vesicles and poor sperm motility. When the semen culture was positive but there was no evidence of inflammation neither seminal vesicle function nor sperm motility was affected. When the semen culture was negative, i.e. no evidence of inflammation and the subjects were asthenozoospermic, the corrected fructose levels were normal. It is proposed that in these conditions the cause of asthenozoospermia may be factors other than accessory sex organ dysfunction. In conclusion, there was no close relationship between the bacteriological results and evidence of inflammation of the accessory glands. A positive semen culture was related to lower levels of corrected fructose (hypofunction of the seminal vesicles) when the positive sperm culture was associated with inflammation of the reproductive tract and asthenozoospermia.

Adult↗

Immunoglobulins and immunoglobulin-containing cells in the reproductive tracts of rams naturally infected with Brucella ovis.

Thirteen rams with serological evidence of Brucella ovis exposure (CFT of 1:8 or greater), but with no or only mild epididymitis, were selected from a ram flock. Serum, semen, preputial washings and fluids from the accessory sex glands (ASGF) and testis and epididymis (TEF) were examined and immunoglobulin (Ig) concentrations estimated. Genital tissues were examined histologically and the percentages of class specific immunoglobulin containing cells (ICC) determined. Eleven of these rams had histological evidence of active inflammation consistent with B. ovis infection; the organisam was cultured from the semen of 7. IgA concentration was high in semen (mean +/- standard deviation of 5.03 +/- 1.78 mg/ml) and ASGF (9.18 +/- 7.28 mg/ml). These levels were much higher than those recorded in noninfected rams. IgA concentration was low in serum (0.78 +/- 0.55 mg/ml) and TEF (0.59 +/- 0.78 mg/ml). The concentrations of IgG1, IgG2 and IgM were low in all genital fluids sampled and not significantly different from those recorded in noninfected rams. This indicated that infection with B. ovis results in a pronounced IgA response in secretions, mostly from the accessory sex glands. Examinations of ICC, however, revealed that the plasma cell infiltrates of the epididymis, vas deferens, ampulla and seminal vesicle were predominantly IgG-containing (92.4, 97.2, 79.4 and 91.9% respectively). Fewer IgM-containing cells were scattered throughout these tissues, constituting 3.9, 6.3, 0.3 and 6.5% of all ICC, respectively. IgA-containing cells were most frequently seen in the ampulla (9.6% of ICC) where they were located directly beneath the epithelium, suggesting the ampulla as the most prominant location for the local production of IgA.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗