The Link Between STDs and AIDSBy 1992 between 9 and 11 million adults and about 1 million children had been infected with the AIDS-causing human immunodeficiency virus (HIV), according to World Health Organization estimates. Two-thirds of these people live in developing countries. By 2000, 30 to 40 million will be infected. By then 10 million people with HIV infection will have developed AIDS, and 90% of them will be living in developing countries (327).Other sexually transmitted diseases make it easier for HIV to pass from one person to another. Chancroid, chlamydia, gonorrhea, syphilis, and trichomoniasis may increase the risk of HIV transmission by two to nine times (46, 55, 105, 147, 149, 152, 234, 263, 275, 312). The link between HIV infection and other STDs may partly explain why HIV in heterosexual populations is more prevalent in Africa than in Europe and the US, where STDs are more often treated and cured (46). Carried in body fluids, HIV may leave one person's body and enter another's more easily through genital ulcers. HIV itself has been isolated from the genital ulcers of women with HIV infection (146). Thus the link is clearest between HIV infection and STDs that cause genital ulcers, although not all studies find an association. Six of 10 studies in Kenya and Zaire, for example, found that people with genital ulcers, caused mainly by chancroid, were more likely to be infected with HIV than people without ulcers. Their risk was two to five times greater. Nine of 11 studies of syphilis and HIV infection found an association. Syphilis increased the risk of HIV infection threefold to ninefold for heterosexual men. Three of six studies of genital herpes and HIV infection found an association. Herpes doubled the risk of HIV infection for women and heterosexual men (312). Six studies found that chlamydia, gonorrhea, and trichomoniasis, which do not cause ulcers, increase the risk of HIV transmission to women by three to five times (312). Several studies, however, have found no link between these STDs and HIV infection, but methodological problems may have obscured the connection. These STDs may enhance HIV transmission because they increase the number of white blood cells—which are both targets and sources of HIV—in the genital tract and because genital inflammation may cause microscopic cuts that can allow HIV to enter the body. Diseases causing vaginal and urethral inflammation are far more common than genital ulcer diseases and so may be responsible for a larger share of HIV transmission. Infection with HIV also affects the other STDs. In people with HIV infection other STDs may be more resistant to treatment. For example, several studies have reported that one-dose treatment for chancroid failed at least six times more often in HIV-infected patients than in patients without HIV infection (45, 173). Also, syphilis lesions may last longer in people infected with HIV, and these people may get gonorrhea more often (312). Thus HIV enhances its own transmission: With longer-lasting STD symptoms, people with HIV infection are more likely to transmit HIV and increase the pace of the AIDS epidemic. |
What Must Programs Do?To be most effective, STD programs must:
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The Syndromic ApproachIn the syndromic approach providers diagnose and treat patients on the basis of groups of symptoms, or syndromes, rather than for specific STDs. Thus, for example, they treat for vaginal discharge or genital ulcer rather than for gonorrhea or syphilis. Since several STDs can cause a particular syndrome, providers may need to treat for several STDs at the same time. For example, genital ulcer is a symptom of both chancroid and syphilis. Therefore providers using the syndromic approach in areas where both are prevalent should treat patients with genital ulcers for both STDs. Similarly, vaginal discharge is a symptom of bacterial vaginosis, candidiasis, chlamydia, gonorrhea, and trichomoniasis, and providers may need to treat patients for all five STDs. Information about the patient's sexual history can help to distinguish between syndromes that are sexually transmitted and other reproductive tract infections—especially candidiasis and bacterial vaginosis—which are not, or not usually, sexually transmitted. Also, surveillance of STDs—that is, collecting records of diagnoses—can identify the most prevalent STDs in an area and, for a particular syndrome, reduce the number of diseases that providers need to treat.Syndromic diagnosis is not new. Many providers in developed countries use syndromic diagnosis because they do not want to wait several days for the results of laboratory tests before they treat STD patients. Syndromic diagnosis has several important benefits:
WHO is planning to compare the effectiveness of syndromic diagnosis with clinical and laboratory diagnosis in several developing countries (126). A theoretical comparison of the cost-effectiveness of the three approaches to diagnose 500 patients with genital ulcer, 500 with urethral discharge, and 500 with vaginal discharge found that clinical and laboratory diagnoses each cost two to three times as much as syndromic diagnosis. The costs of personnel and treating complications after incorrect diagnosis accounted for most of the difference. The analysis assumed that laboratory and clinical diagnosis can be performed only by physicians and that false negative laboratory tests or mistaken clinical judgments result in complications that require treatment. By treating for all STDs that cause a syndrome, syndromic diagnosis avoids many complications (125). |
Improving Care for Women with STDsWomen are often the silent victims of STDs. They may not know that they have an STD. If they know, they may not know where to seek treatment. Many women know that their partners have STDs or may risk STDs, but they must submit silently to having unprotected sex; refusing sex or suggesting condoms risks violence. The alternative—leaving the relationship—may be out of the question for women who are economically dependent or lack education.STD programs can take a number of steps to provide services for women, to get women to use services, and to enable women to protect themselves against unsafe sexual relationships:
Providing Services for Women
Getting Women to Services
Enabling Women to Protect Themselves
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Family Planning and STDs: How Do They Mix?Most family planning programs can not offer high-quality services without paying attention to STDs. Family planning providers need to tell clients about the STD protection that various contraceptive methods do or do not provide. They must make clear that people at risk for STDs should use condoms, whether or not they use another method. Also, for women interested in the IUD, providers must assess their risk of getting an STD and, if possible, screen them for STDs. Those who have an STD or are at risk should use another method. (See sidebar, Contraceptives and Sexually Transmitted Diseases)What more should family planning programs do? Should they ask clients about symptoms and refer them to another facility for diagnosis and treatment? Should they screen all clients for STDs and refer for diagnosis and treatment? Should they also provide treatment—for one, two, or more STDs? Assessing clients' needs—through screening studies and focus-group discussions, for example—can help programs learn what is needed. Of course, the appropriate level of STD services also depends on resources, including the drug supply. Programs are trying a variety of approaches. Affiliates of the International Planned Parenthood Federation (IPPF) in Africa and Latin America, for example, typically provide some counseling for symptomatic clients and refer them to a government clinic for diagnosis and treatment (103, 250). A number of programs diagnose and treat some but not all STDs. For example, the Gambia Family Planning Association treats women with candidiasis and trichomoniasis but refers all other women with STDs to government clinics (280). A few programs provide complete services. The Asociación Demográfica Salvadoreña (ADS), for example, screens family planning clients, treats patients, provides community outreach, distributes condoms, and notifies partners (5). In the US most family planning clinics screen clients for STDs, particularly gonorrhea and syphilis, and many both diagnose and treat STDs (2, 77, 111, 172, 235, 284). A 1990 survey of about 400 US family planning clinics found, for example, that almost all clinics screened clients for gonorrhea at the initial visit, annual visit, or when clients had symptoms, and 82% treated gonorrhea. Almost half screened for syphilis at the initial visit and treated syphilis. Almost all told infected clients to notify partners, and about one-third used staff or clinic resources to notify partners (284).
Why Strengthen STD Services?Family planning programs have decided to strengthen STD services for many reasons:
DrawbacksStrengthening STD services can have disadvantages for family planning programs:
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Contraceptives and Sexually Transmitted DiseasesFamily planning programs need to protect clients against both pregnancy and STDs. The most effective contraceptives—voluntary sterilization, injectables, Norplant, IUDs, and the pill—do not protect against STDs. Condoms, in contrast, protect against a variety of STDs, including HIV infection (20, 64, 85, 206, 221, 345). In an analysis of nine observational studies, condom users' risk of developing gonorrhea was about 60% that of those not using contraception. Two studies of chlamydia and two of trichomoniasis found that condom users' risk was three-quarters that of nonusers (259). Between 10% and 15% of women who rely on condoms become pregnant in the first year of use, however, mainly because they and their partners do not use condoms consistently or correctly (342). Thus, for clients at risk, some providers recommend a highly effective, convenient contraceptive method—an injectable, for example—along with condoms (see Table 4). Without strong motivation, however, clients may find it difficult to use two methods—condoms for STD prevention and some other method for pregnancy prevention. Many people, after all, have trouble using one method consistently, particularly condoms. Studies in the US of sterilized women and adolescent users of oral contraceptives have found low rates of condom use (267, 319). In the study of sterilized women, for example, 35% were at risk for STDs, but only 22% used condoms at least some of the time. By comparison, 37% of women who were not sterilized were at risk for STDs, and 54% used condoms at least some of the time (267).Some women are not able to persuade their partners to use condoms. What then? Some argue for more emphasis on methods that women control: spermicides, diaphragm, cervical cap, contraceptive sponge, or, as it becomes available, the female condom (a polyurethane or latex sheath that a woman can insert into her vagina before having sexual intercourse). Some studies have found that in practice the diaphragm and sponge actually provide more protection against STDs or their sequelae than condoms, probably because they are used more regularly (260). Others, however, argue that there is too little evidence that spermicides and female barrier methods prevent STD transmission as well as condoms do. They also are concerned about reports of vaginal irritation caused by frequent spermicide use (that is, several times a day) among commercial sex workers. Such irritation can increase the risk of HIV transmission (48). Used less frequently, however, spermicides may not cause vaginal irritation. More research is needed on (1) contraceptive methods that women control and that protect completely against STDs; (2) methods that allow women to become pregnant and still protect them against STDs—for example, a microbicide that kills STD pathogens but not sperm; and (3) couples' willingness to use condoms and another contraceptive method at the same time. Family planning providers, like STD service providers, need to counsel clients about STDs and stress that condoms and possibly spermicides can protect them. All family planning clients at risk for STDs, regardless of their contraceptive choice, should leave a family planning clinic knowing how to use condoms and where to get them—and, preferably, with some condoms in hand. |
Resource Materials on Sexually Transmitted DiseasesPublications are free of charge unless otherwise noted.Training MaterialsSexually Transmitted Diseases: Clinical Practice Guidelines. US Centers for Disease Control and Prevention (US CDC), May 1991. 113 p. US Department of Health and Human Services, Public Health Service, US CDC, Atlanta, Georgia 30333, USA. Includes guidelines for the organization, operation, and management of an STD clinic; clinic protocols for patient management; medical protocols for all common STDs; and information about equipment and supplies, quality assurance, medical records, and disease reporting. Designed for US practitioners but also useful in developing countries.Sexually Transmitted Diseases: Treatment Guidelines. US CDC, September 1989. 38 p. Available in English and Spanish. Revised English version to be available in late 1993. US Department of Health and Human Services, Public Health Service, US CDC, Atlanta, Georgia 30333, USA. Guidelines focus on treatment and counseling of individual patients, with brief mention of clinical and laboratory diagnosis when appropriate in the context of treatment. Designed for US practitioners but also useful in developing countries. Genital Tract Infection Guidelines for Family Planning Service Programs. The Johns Hopkins Program for International Education in Reproductive Health (JHPIEGO), 1991. 143 p. Available in English and French. US$6. Revised edition available in late 1993. JHPIEGO Corporation, Materials Control Division, Brown's Wharf, 1615 Thames Street, Suite 200, Baltimore, MD 21231, USA. A primary reference for clinicians learning to diagnose and manage STDs frequently encountered in the family planning setting. Includes guidelines for client histories and physical exams, diagnostic techniques and laboratory tests, standardized treatment schedules, and flow charts and illustrations. GTI Teaching Slide Set. JHPIEGO, 1991. Available in English and French. JHPIEGO Corporation, Materials Control Division, Brown's Wharf, 1615 Thames Street, Suite 200, Baltimore, MD 21231, USA. Consists of 104 35-mm slides on three topics: gross and microscopic lesions; diagnosis of trichomoniasis, candidiasis, and bacterial vaginosis; and diagnosis of gonorrhea. A Practical Manual on Sexually Transmitted Diseases for the Caribbean. Revised Version. Caribbean Epidemiology Centre (CAREC), Pan American Health Organization, and World Health Organization, 1992. 118 p. US$10, $6 to students, free to STD service providers in the Caribbean. CAREC, Box 164, Federation Park, Port of Spain, Republic of Trinidad and Tobago. Guide to a systematic approach to STD management and a quick reference for the busy clinician. The Practitioner's Handbook for the Management of STDs. Stamm, W.E., Kaetz, S.M, Beirne, M.B, and Ashman, J.A., June 1988. 117 p. US$29.50, US$7.50 additional shipping costs for developing countries. University of Washington, Health Sciences Center for Educational Resources, Distribution, SB-56, Seattle, Washington 98915, USA. A self-guided instruction manual in a 3-ring binder with graphic presentation of flow charts, tables, laboratory methods, and diagnostic tests. Counselling and Sexuality: A Training Resource. AIDS Prevention Unit, International Planned Parenthood Federation (IPPF), 1992. Four videos and a 140-page guide. Guide may be purchased alone for US$10. Videos available separately or as a set; each video comes with a copy of the guide. US$35 for each video or $100 for the set. Video formats: English—PAL/NTSC; Arabic—PAL. IPPF Distribution Unit, P.O. Box 759, Inner Circle, Regent's Park, London NW1 4LQ, United Kingdom. Designed to help extend counseling programs from covering just contraceptive methods to covering the broader area of sexuality. Includes activities for educating providers about sexuality; guidelines and skills for counseling clients on sexuality, STDs, and sexual problems; and exploration of related policy and management concerns. One of the videos, entitled "I've Got Gonorrhea," depicts counseling a couple in which the woman has contracted gonorrhea from her husband. Recommendations for the Management of Sexually Transmitted Diseases. WHO. To be published in late 1993. WHO, 1211 Geneva 27, Switzerland. Comprehensive guidelines for the management of the most commonly encountered syndromes, including those due to chancroid, syphilis, gonorrhea, chlamydia, trichomoniasis, and candidiasis. Also includes management of STDs in the HIV-infected patient.
Color Atlas and Synopsis of Sexually Transmitted Diseases. H. Hunter Handsfield. New York, McGraw-Hill, Health Professions Division, 1992. 203 p., 136 full-color photographs. US$35 in the US; availability and prices vary in developing countries. McGraw-Hill Publications, Princeton-Hightstown Road, Hightstown, New Jersey 08520, USA. Includes case studies, an overview of STDs, summary diagnosis and management of common, uncommon, and life-threatening STDs and syndromes, information on management of patients' sex partners, and a clinical summary for each photograph. Laboratory Methods for the Diagnosis of Sexually Transmitted Diseases. 2nd ed. Wentworth, B.B., Judson, F.N., and Gilchrist, M.J.R., eds. American Public Health Association (APHA), 1991. 339 p. US$40 plus US$10 shipping outside the US. APHA, 1015 Fifteenth Street, NW, Washington, DC 20005, USA. A practical guide for the diagnosis of STDs, useful in both clinical and laboratory settings. Provides detailed descriptions of the many different methods and types of diagnostic tests, both old and new, for most STDs, including syphilis, gonorrhea, herpes, genital warts, hepatitis, and HIV infection. Designed for US practitioners but useful in developing countries.
American College of Obstetricians and Gynecologists (ACOG) Patient Education pamphlets. ACOG Distribution Center, Box 4500, Kearneysville, WV 25430 4500, USA.US$15 per pack of 50 pamphlets; postage is $2 per $25 order. Pamphlets on genital warts, pelvic inflammatory disease, and STD prevention. |
| STD Diagnostics Initiative Seeks Quick, Inexpensive Tests Formed in 1990 by an international group of STD experts, the STD Diagnostics Initiative is working to identify or develop rapid and accurate diagnostic methods and to introduce them into STD control programs. The initiative is funded primarily by the United States Agency for International Development. Other donors include the Rockefeller Foundation, the United States Centers for Disease Control and Prevention (US CDC), and the United States National Institutes of Health (274). The initiative currently has three working groups—for chlamydia, for gonorrhea and syphilis, and for syndromicdiagnosis (242). For detecting chlamydia there are currently about 20 kits that do not require culturing a sample. The chlamydia working group has collaborated with the US CDC to evaluate some of the kits for stability, reproducibility, and accuracy. It also is surveying manufacturers on bulk purchase policies and prices (285). The working group for gonorrhea and syphilis is testing a field culture method for detecting gonococcal infection, especially cervicitis, and a finger-stick method for syphilis screening (308). On behalf of the working group for syndromic diagnosis, the Program for Appropriate Technology in Health is evaluating a method of detecting gonorrhea quickly. A sample of urethral discharge is applied to strips that turn purple within a minute if Neisseria gonorrhoeae is present (287, 293, 308). |
Outreach to High-Risk Populations ...The path of STDs into the general public usually leads through identifiable populations that have unprotected sexual intercourse with multiple sexual partners—for example, prostitutes, their clients, truck drivers, and the military. Providing services for high-risk populations can prevent or slow the spread of STDs into secondary risk groups—people who do not practice risky behavior but are infected by people who do—for example, women whose sexual partners have sex with prostitutes, and the infants of infected women (157, 183, 215, 262, 330).Treating and preventing STDs in high-risk populations, particularly prostitutes, has been a standard strategy for the control of STDs (233). Recently, this strategy has become controversial. When directed at prostitutes, such an approach may seem to blame them for an STD epidemic. Focusing on high-risk populations also may divert attention from preventive information and services for the general population (228). Focusing on high-risk populations has been effective in some circumstances, however. For example, outbreaks of chancroid in North America have been contained by treating prostitutes and their sexual partners (31, 129, 303). Also, once an STD has spread into secondary risk populations, treating STDs among high-risk populations can prevent many more new cases than treating STDs in the secondary risk populations. One projection found, for example, that treating 100 cases of gonorrhea in a high-risk population would prevent over 4,000 cases in secondary risk populations in 10 years, whereas treating 100 cases in the secondary risk populations would prevent only 426 cases (215). Most programs for high-risk populations focus on prostitutes. A 1991 review of 83 AIDS prevention programs focusing on high-risk populations in 38 developing countries, conducted by the WHO Global Program on AIDS (WHO/GPA), found that 50 worked only with prostitutes. Twenty-eight worked with both prostitutes and clients or else with clients alone, mainly truck drivers and the military (83).
Outreach to ProstitutesOutreach programs for prostitutes usually comprise baseline research, treatment, education, and condom promotion.Baseline research helps to identify the specific groups a program is trying to reach and to design appropriate messages. Research can identify the different types of prostitutes in an area, where they work, and whether they are independent or managed by a pimp, madame, or hotel manager. Research also can identify whom prostitutes trust. In a program in Bulawayo, Zimbabwe, for example, baseline research found that prostitutes trusted hotel security staff. As a result the program trained the security staff to counsel the prostitutes (158). Also, research can elicit prostitutes' and clients' opinions about condoms, in what situations they use them, and what inhibits condom use (158). Programs have treated prostitutes in clinics located where prostitutes live or socialize. This has been done in the Dominican Republic, Kenya, Nigeria, Scotland, and elsewhere (44, 81, 206, 339). Also, programs have arranged for a doctor or nurse to care for prostitutes where they work, as has been done in India, Nigeria, and Tanzania (104, 182, 237). Some governments—in Bolivia, Djibouti, Greece, Thailand, and the Philippines, for example—require registered prostitutes to attend clinics periodically for testing and treatment (32, 195, 217, 254, 297). Educational activities explain what STDs are, stress prostitutes' risk of infection, and promote condom use. Counseling messages include:
Prostitutes counsel other prostitutes in many AIDS and STD prevention programs. Current or former prostitutes who are trained in STD prevention can have more influence on other prostitutes than outsiders (57), and they can reach prostitutes more easily. Between 1987 and 1991 about 600 peers counseled about 21,000 prostitutes in 28 projects supported by AIDSTECH, a 5-year project funded by the United States Agency for International Development and managed by Family Health International (84). Evaluating peer counseling is difficult because it is usually one of several components in outreach programs. One study in Nairobi, Kenya, found that 80% of prostitutes who had individual peer counseling and attended community education meetings reported some condom use. By comparison, 70% of prostitutes who only attended community education meetings reported some condom use. The program also provided STD and HIV testing, STD treatment, and free condoms (206). Some programs are helping prostitutes to find other work. In the Philippines, for example, the private nonprofit organization Third World Movement Against the Exploitation of Women trains prostitutes in dressmaking, typing, and computer operation (32). Promoting condoms in commercial sex is difficult because most clients prefer sex without a condom. In addition to interpersonal counseling and other educational approaches, programs have worked with brothels or prostitutes' organizations. For example:
Outreach to Prostitutes' ClientsChanging the sexual behavior of men—particularly prostitutes' clients—is essential to STD management. Programs reach men where they work, where they socialize, and where prostitutes work. Most involve educational activities and condom promotion, and a few provide treatment as well.In areas where prostitutes work, programs have:
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