Epidemiology of anorectal chlamydial and gonococcal infections among men having sex with men in Seattle: utilizing serovar and auxotype strain typing

BACKGROUND: Bacterial sexually transmitted diseases (STDs) among men who have sex with men (MSM) have recently increased in Seattle. GOALS: Serovar and auxotype typing of strains was used to assess the epidemiology of anorectal chlamydial and gonococcal infections among MSM attending an STD clinic. STUDY DESIGN: The prevalences of anorectal chlamydial infection and gonorrhea among MSM attending an STD clinic during the period of 1994 to 1996 were compared with prevalences during 1997 to 1999. A retrospective case-control study of MSM attending an STD clinic between 1997 and 1999 was performed. Anorectal chlamydial isolates were characterized by serovar and gonococcal isolates were characterized by serovar and auxotype. Infected MSM were mapped by residence and strain type. RESULTS: Prevalences of anorectal chlamydial and gonococcal infections increased from 4.0% and 6.3%, respectively, during 1994-1996 to 7.6% and 8.7%, respectively, during 1997-1999 (P = 0.004 and P = 0.013 for chlamydial infection and gonorrhea, respectively). Most chlamydial infections were caused by serovars G (47.9%) and D (29.6%), and most gonococcal infections were caused by auxotype/serovar classes Proto/IB-1 (43.3%), Proto/IB-3 (16.5%), and Proto/IB-2 (10.3%). MSM with anorectal chlamydial infection more often had chlamydial urethritis (P = 0.005) and were not white (P = 0.046), in comparison with controls. MSM with anorectal gonorrhea more often had pharyngeal gonorrhea (P < 0.001), had a history of gonorrhea (P = 0.003), and were younger than age 30 years (P = 0.039), in comparison with controls. Residences of MSM with anorectal gonorrhea were clustered in urban areas, whereas those of MSM with anorectal chlamydial infection were more dispersed. CONCLUSION: Prevalences of anorectal chlamydial infection and gonorrhea among MSM in Seattle have increased dramatically over the past 3 years. Serovar and auxotype analyses indicate these increases are not clonal but are due to the spread of unique distributions of strains that differ from those causing urogenital infections in the same community.     

Pattern of sexually transmitted diseases among pregnant women in Burkina Faso, west Africa: potential for a clinical management based on simple approaches.

OBJECTIVES: (1) To determine the prevalence of sexually transmitted diseases (STDs) in pregnant women in Burkina Faso. (2) To evaluate the potential of clinical management of STDs based on screening with clinical data and urine leucocyte esterase test (LET). METHODS: Cross sectional study among antenatal clinic attendees was conducted in 1994 in Ouagadougou and Bobo-Dioulasso, the two largest urban centres in Burkina Faso, where more than 94% of the pregnant women benefit from antenatal care at least twice during their pregnancy. Each woman selected underwent an interview, general and gynaecological examination. Genital samples were collected to confirm the presence of STD pathogens. Logistic regression analysis was done to identify models that predict (a) gonorrhoea and/or chlamydia, (b) trichomoniasis and/or bacterial vaginosis, (c) candidiasis. Sensitivity, specificity and positive and negative predictive values of these models were assessed using standard methods. RESULTS: All 645 consecutive pregnant women were enrolled in the two sites. Among these women 32.4% presented at least one STD. The major STDs were: trichomoniasis (14%), bacterial vaginosis (13%), recent syphilis (3.6%), chlamydial infection (3.1%), genital warts (3%), gonococcal infection (1.6%) and genital ulcer (0.8%). Prevalence of vaginal candidiasis was 14%. The use of a risk marker (length of relationship with regular sexual partner < 3 years), and the positivity +3 of the urine LET provided a sensitivity of 80% and a positive predictive value of 7% for the screening of gonococcal and/or chlamydial infection. If clinical signs and positivity of the urine LET were taken into account sensitivity and positive predictive value of trichomoniasis and/or bacterial vaginosis screening were 77% and 37%, respectively. Clinical signs and positivity of the urine LET showed a low sensitivity (23%) for screening vaginal candidiasis. CONCLUSIONS: The prevalence of STDs in pregnant women is high in urban Burkina Faso. Systematic screening combined with effective treatment should be included in antenatal care in the future. Urine LET, if associated with interview and clinical examination offers a simple, rapid and affordable tool for systematic screening of STDs in pregnant women. However, the proportion of overtreatments with proposed strategies will be high. Further studies are needed to develop and validate better algorithms with probably cheap laboratory tests.     

Prevalence of chlamydia and gonorrhoea among a population of men who have sex with men

OBJECTIVES: Few data are available on the prevalence of sexually transmitted diseases (STDs) in men who have sex with men (MSM), making it difficult to develop STD screening guidelines for this population. The objective of the study was to determine the prevalence of urethral infections caused by Chlamydia trachomatis and Neisseria gonorrhoeae within a large, community based population of MSM, and to assess the feasibility of rectal screening in this population. METHODS: This was a cross sectional study of 566 MSM, who were predominantly middle aged, white, asymptomatic, and engaged in sex with multiple partners. All provided a urine sample to screen for chlamydial and gonorrhoea infections using a PCR assay; rectal screening was performed on 48 participants. RESULTS: Urethral C. trachomatis infections were detected in 1/566 participants (prevalence 0.2%, 95% CI 0.004% to 1.0%), and rectal C. trachomatis infections were detected in 2/48 men (prevalence 4.2%, 95% CI 0.5% to 14.2%). No gonorrhoea infections were detected, and none of the 117 HIV positive men had either infection. CONCLUSIONS: Chlamydial and gonorrhoea infections were uncommon in this sample of MSM, even among those with multiple sexual partners or HIV infection. These data call into question recommendations to screen all MSM based on their individual sexual behaviours or HIV. Additional data are needed on the prevalence of these infections in MSM from different settings.     

Sexual relationships, risk behaviour, and condom use in the spread of sexually transmitted infections to heterosexual men.

OBJECTIVE: To examine the effect of patient defined non-regular sexual relationships and other risk behaviours on the incidence of sexually transmitted infections in heterosexual men and the role of condom use in the prevention of their spread. DESIGN: A prospective cross sectional study of sexual behaviour reported by a standardised self administered questionnaire in new patients who presented for screening and diagnosis. SETTING: A genitourinary medicine clinic in west London. SUBJECTS: 957 consecutive newly attending heterosexual men who completed a sexual behaviour questionnaire in 1993/94. MAIN OUTCOME MEASURES: Variables relating to sociodemographic status, sexual behaviour, condom use, sexually transmitted infections and testing for HIV infection, stratified by the reporting of non-regular partners. RESULTS: We found that the 65% of men who reported non-regular sexual partners were more likely to be white collar class (d = 7.5%, 95% CI = 1.3, 13.7) and to have had sexual intercourse with non-United Kingdom born women (d = 7.8%, 95% CI = 3.5, 12.2). They also reported coitarche before 16 years of age (d = 13.4%, 95% CI = 8.0, 18.8) and many more sexual partners both in the last year (d = 13.1%, 95% CI = 10.2, 16.0) and in their lifetime (d = 27.9%, 95% CI = 21.6, 34.2). They were significantly more likely to practise anal intercourse (d = 8.7%, 95% CI = 3.3, 14.1), to smoke (d = 16.3%, 95% CI = 9.8, 22.6), to drink alcohol (d = 4.9%, 95% CI = 1.2, 8.6), and to have chlamydial infection (d = 5.7%, 95% CI = 2.2, 9.2), of which 30% was subclinical. Increasing condom use with regular partners correlated with decreasing incidence of urethral infection (gonorrhoeal and/or chlamydial infection) (p < 0.03) and candidal balanitis (p < 0.03) and a greater likelihood of no infection being detected (p = 0.0002). Use of condoms with non-regular partners was much more frequent than with regular partners (d = 21.4%, 95% CI = 16.7, 26.1). However, we found evidence of oral transmission of urethral gonorrhoea and chlamydial infection among men who reported always using condoms. HIV infection was found in only two men (0.2%), both of whom reported intercourse with non-United Kingdom born women. CONCLUSIONS: Heterosexual men who reported non-regular sexual relationships compensated for their increased risk lifestyle by using condoms more frequently and showed only an increased incidence of chlamydial infection. More consistent condom use with regular partners was significantly associated with the absence of sexually transmitted infection. These findings suggest that transmission between regular partners has been underestimated.     

Bacterial vaginosis (BV) and the risk of incident gonococcal or chlamydial genital infection in a predominantly black population

OBJECTIVE: The objective of this study was to assess in prospective data whether bacterial vaginosis (BV) is associated with gonococcal/chlamydial cervicitis. STUDY: A total of 1179 women at high risk for sexually transmitted infections was followed for a median of 3 years. Every 6 to 12 months, vaginal swabs were obtained for Gram stain, culture of microflora, and Neisseria gonorrhoeae and Chlamydia trachomatis. A Gram stain score of 7 to 10 based on the Nugent criteria categorized BV. RESULTS: Baseline BV was associated with concurrent gonococcal/chlamydial infection (adjusted odds ratio, 2.83; 95% confidence interval [CI], 1.81-4.42). However, the association between BV and subsequent, incident gonococcal/chlamydial genital infection was not significant (adjusted relative risk [RR], 1.52; 95% CI, 0.74-3.13). Dense growth of pigmented, anaerobic Gram-negative rods (adjusted RR, 1.93; 95% CI, 0.97-3.83) appeared to elevate the risk for newly acquired gonococcal/chlamydial genital infection. CONCLUSIONS: BV was common among a predominantly black group of women with concurrent gonococcal/chlamydial infection but did not elevate the risk for incident infection.     

Rapid assessment of sexually transmitted diseases in a sentinel population in Thailand: prevalence of chlamydial infection, gonorrhoea, and syphilis among pregnant women--1996

OBJECTIVE: To determine the prevalence of sexually transmitted diseases (STDs) among pregnant women in Thailand, where case reporting suggests a marked decrease in STDs following a campaign promoting condom use during commercial sex. DESIGN: Cross sectional study of women at their first visit to the study hospitals' antenatal clinics in Chiang Rai (n = 500) and Bangkok (n = 521). METHODS: First catch urine specimens were tested for Chlamydia trachomatis and Neisseria gonorrhoeae using the Amplicor CT/NG polymerase chain reaction assay. Syphilis and HIV serological testing were performed in the study hospitals' laboratories. RESULTS: The prevalence of chlamydial infection was 5.7%, gonorrhoea 0.2%, and syphilis 0.5% (all VDRL or RPR titres were < or = 1:4). The prevalence of HIV infection was 7.1% in Chiang Rai and 2.9% in Bangkok. In a multivariate logistic regression analysis, chlamydial infection was associated with younger age and with higher gestational age at first antenatal clinic visit, but was not associated with marital status, gravidity, city of enrollment, or HIV infection status. CONCLUSIONS: There was a low prevalence of gonorrhoea and syphilis among these pregnant women in Thailand. Chlamydial infection was detected at a higher prevalence, especially among younger women and women registering later for antenatal care. Testing of pregnant women using easily collected urine specimens and a sensitive nucleic acid amplification assay is a feasible method of rapidly assessing chlamydial and gonococcal prevalence.


     

Risk factors for sexually transmitted diseases among women attending family planning clinics in Dar-es-Salaam, Tanzania.

BACKGROUND: Identification of risk factors for sexually transmitted diseases (STDs) assists in development of treatment algorithms, which are potentially important components of STD control when microbiologic facilities are limited. METHODS: A cross-sectional study was performed to assess STD and HIV risk factors of 2285 women attending three family planning clinics in Dar-es-Salaam, Tanzania during 1991-92. Women were interviewed and examined for signs of STDs. Specimens were taken for laboratory diagnosis of HIV, other sexually transmitted organisms, and Candida albicans. RESULTS: The prevalence of gonorrhoea was found to be 4.2%, prevalence of trichomoniasis was 14.3%, and positive syphilis serology was found in 2.5% of women. Unmarried women were at increased risk of trichomoniasis (age-adjusted OR = 1.48 95% CI [1.12, 1.95]), gonorrhoea (age-adjusted OR = 1.81 95% CI [1.14, 2.86]) and syphilis (age-adjusted OR 1.5 [0.84, 2.68]). An increasing number of sexual partners in the past five years was associated with an increased risk of all STDs. Current use of the oral contraceptive pill was positively associated with gonorrhoea, multivariate OR = 1.75 95% CI [1.05, 2.93]. The prevalence of candidiasis was 11.5% and was not associated with any of the demographic or behavioural risk factors examined. Clinical diagnostic algorithms for STDs in this study population had relatively low sensitivity and low positive predictive value. CONCLUSION: Being unmarried and having a higher number of sexual partners were consistently associated with each STD, while the associations for other risk factors varied between STDs, emphasising the complexity of STD distribution. Further development of diagnostic algorithms and other methods for screening women for STDs are needed to reduce the impact of STDs and HIV in developing countries.     

Factors associated with genital chlamydial and gonococcal infection in males.

BACKGROUND--Predictors of chlamydia and gonorrhoea can be used to increase the cost-effectiveness and acceptability of screening programmes, and allow targeting of control strategies. METHOD--All men attending an STD clinic in 1988-1990 were offered screening for chlamydia and gonorrhoea, and the test results correlated with a wide range of potential predictors using multiple logistic regression. RESULTS--Of 9622 attenders, 7992 (82.3%) were tested over a total of 10,110 episodes for chlamydia and 10,090 episodes for gonorrhoea, yielding 729 (7.2%) chlamydial and 123 (1.2%) gonococcal infections. Having urethral discharge and/or dysuria, being heterosexual, and STD contact, unmarried, uncircumcised, tattooed and not having had an STD previously were independently associated with chlamydial infection. Having urethral discharge and/or dysuria, being Aboriginal, an STD contact, homosexual, uncircumcised, tattooed and having sex outside the state in the past three months, no steady partner in the past three months and multiple partners in the past month were associated with urethral gonococcal infection. Selective screening criteria for gonorrhoea provided 90% of positives, eliminated the need for 58% of tests and resulted in an increased yield ratio of 2.2 whereas the corresponding outcomes for screening criteria for chlamydia were 93% 20% and 1.2 respectively. CONCLUSIONS--The widespread influence of confounding on potential predictors for both gonorrhoea and chlamydia may provide misleading indicators of risk factors by univariate analysis. In the setting studied the benefits of selective screening for gonorrhoea in men would be substantial, whereas satisfactory criteria for selective screening for chlamydia could not be identified.     

Prevalence and risk factors of chlamydia and gonorrhea among rural Nepali women

OBJECTIVES: The epidemiology of sexually transmitted infections (STI) in rural, developing world populations is poorly understood. We estimated the prevalence and risk factors of Neisseria gonorrhoeae and Chlamydia trachomatis in a female population in rural Nepal. METHODS: We conducted a cross sectional study in a sample of 1177 postpartum women participating in a micronutrient supplementation trial in Nepal. Urine samples were collected to test for the two infections using the ligase chain reaction (LCR). RESULTS: C trachomatis was detected in 1.0% (95% confidence intervals (CI): 0.4 to 1.5) and N gonorrhoeae in 2.3% (95% CI: 1.2 to 3.4) of women. None of the women tested positive for both. Self report of all three symptoms of lower abdominal pain, pain and burning on urination, and vaginal discharge was associated with the presence of gonorrhoea (odds ratio (OR): 12.1, 95% CI: 1.3 to 115.0). Neonatal eye discharge was associated with maternal gonococcal infection (OR = 5.2, 95% CI: 1.1 to 24.9). Incidence of low birth weight was not related to these maternal infections, but very preterm delivery (<32 weeks) was higher among women positive for gonorrhoea (OR = 4.7, 95% CI: 1.0 to 22.0). In a multivariable analysis, low body mass index (<18.5) and cattle ownership were associated with gonorrhoea (p <0.05), whereas woman's literacy was associated with chlamydia (p = 0.06). CONCLUSION: We found the rates of N gonorrhoeae and C trachomatis to be low among women in this rural population of Nepal.     

Trends in female sexual behaviour and sexually transmitted diseases in London, 1982-1992.

OBJECTIVE--To measure changes in female sexual behaviour, including condom use, and their relationship with the incidence of sexually transmitted and other genital diseases in women during the decade 1982-92. DESIGN--A prospective series of cross-sectional surveys of sexual behaviour reported by a standardised self-administered questionnaire in new patients who presented for screening and diagnosis. SETTING--A genitourinary medicine clinic in West London. SUBJECTS--4089 consecutive newly attending patients who completed sexual behaviour questionnaires during 1982, 1987, 1989 and 1992. MAIN OUTCOME MEASURES--Trends in socio-demographic status, sexual behaviour, condom-use, sexually transmitted diseases and other genital infections diagnosed by routine clinical and laboratory methods. RESULTS--Women reported significantly increasing condom use (from 3.6% to 20.7%) and decreasing oral contraception (from 51.2% to 40.1%), but the proportion who used no contraception (23.6% to 24.7%) and the proportion who had never been pregnant (58.3% to 59.9%) remained similar. Numbers of sexual partners in the preceding year decreased (p < 0.001) and an increasing proportion of women practised oral intercourse (p < 0.001). During the same period, there was a progressive decline (p < 0.001) in the incidence of gonorrhoea, chlamydial infection and trichomoniasis by approximately two-thirds. However, the incidence of vaginal candidosis (p < 0.001), bacterial vaginosis (p < 0.001) and genital warts (p < 0.01) increased. CONCLUSIONS--Increasing use of condoms for vaginal intercourse with both regular and non-regular partners has been associated with a decrease in the incidence of gonorrhoea, chlamydial infection and trichomoniasis. There was also an increase in the practice of fellatio and a change in the spectrum of STD and other genital infections with little net reduction in morbidity. HIV infection showed no evidence of heterosexual spread.     

Alcohol and drug use and related disorders: An underrecognized health issue among adolescents and young adults attending sexually transmitted disease clinics

OBJECTIVES: The objectives of this study were to describe patterns of alcohol and drug use disorders among young persons attending a public sexually transmitted disease (STD) clinic and to determine their associations with sexual risk behaviors and STDs. STUDY DESIGN: Four hundred forty-eight men and women aged 15 to 24 who were attending an urban STD clinic completed an interviewer-administered questionnaire that assessed a broad range of substance use in general and for alcohol and marijuana use disorders. RESULTS: Overall, 42.9% had an alcohol or marijuana use disorder (51.6% of males and 34.2% of females), whereas 30.6% had a confirmed STD. Participants with a substance use disorder were significantly more likely to have multiple sexual partners (odds ratio [OR] = 2.3; 95% confidence interval [CI] = 1.5-3.4), to be inconsistent condom users (OR = 3.1; 95% CI = 1.5-6.3), and to have an STD (OR = 1.7; 95% CI = 1.1-2.6). CONCLUSIONS: Among young STD clinic attendees, substance use disorders were more common than confirmed STDs. STD clinics may be an appropriate setting to screen for and address substance use disorders in young persons.     

Sexually transmitted infections and HIV in a rural community in the Lesotho highlands

OBJECTIVES: To conduct a knowledge, attitude, and practice (KAP) study and to determine the prevalence of sexually transmitted diseases (STDs), including HIV, in a community residing in remote, rural Lesotho. METHODS: In 1995 a cross sectional, community based epidemiological study was conducted on a population of 7500 people living in 89 villages. A total of 29 villages were randomly selected and a systematic sample of houses within villages was obtained. Questionnaires were administered to subjects after written consent was obtained. Determination of N gonococcus and C trachomatis infection was done on urine using ligase chain reaction (LCR) technology. Using blood specimens, syphilis was diagnosed by RPR and TPHA tests and HIV by a single ELISA and confirmed with a western blot. RESULTS: Questionnaires were administered to 277 women, 100 men, and 149 youths (12-15 years). Chlamydia was diagnosed in 28.4% of adults, gonorrhoea in 5.9%, syphilis in 11.3%, and HIV infection in 6.3%. All cases of HIV occurred along the main road (p = 0.001) and 72% of individuals with gonorrhoea were co-infected with chlamydia (p = 0.0001). 11.6% of women and 38.0% of men had had sex with a non-regular partner in the past 3 months and none had used condoms. CONCLUSION: A high prevalence of STDs and HIV infection was found in a population characterised by low levels of knowledge about STD/HIV, high risk sexual behaviour, and evidence of inappropriate health seeking behaviour for STDs.     

Vaginal douche practices among black women at risk: exploring douching prevalence, reasons for douching, and sexually transmitted disease infection

OBJECTIVE: The objective of this study was to identify douching patterns and their relation to sexually transmitted disease (STD) among black women seeking an STD evaluation. STUDY DESIGN: This study was a cross-sectional survey with biologic testing for chlamydia and gonorrhea infection. RESULTS: Of 891 participants, 46.1% were current douchers. Commonly identified reasons for douching were to cleanse after menses (65.4%) and to feel fresh (42.2%). Frequent douching was associated with douching after sex (P<0.001), to alleviate an itch (P<0.001), and to feel fresh (P<0.001). Women who douched during menses (adjusted odds ratio [AOR]=4.78; 95% confidence interval [CI]=1.13-20.13) and to alleviate an itch (AOR=3.66; 95% CI=1.00-13.41) were more likely to have a current chlamydial infection. CONCLUSIONS: Douching was common among this high-risk population of black women. Prospective studies are needed to determine the consequences of douching and any mediating effects of women's motivation for the behavior on reproductive health.     

Findings from STD screening of adolescents and adults entering corrections facilities: implications for STD control strategies

BACKGROUND: Persons entering corrections facilities are at high risk for sexually transmitted diseases (STDs) because of risky sexual behavior and lack of access to routine screening. GOAL: The goal of the study was to develop a national picture of STD prevalence in this population. STUDY DESIGN: We analyzed information on age, race/ethnicity, urethral symptoms (men only), and test results for approximately 85,000 chlamydia, 157,000 gonorrhea, and 293,000 syphilis tests for persons entering 23 jails and 12 juvenile detention centers in 13 US counties from 1996 through 1999. RESULTS: At adult jails in nine counties, the median percentage of persons with reactive syphilis tests by county was 8.2% (range, 0.3-23.8%) for women and 2.5% (range, 1.0-7.8%) for men. At juvenile detention facilities in five counties, the median positivity for chlamydial infection was 15.6% (range, 8.0-19.5%) for adolescent girls and 7.6% (range, 2.8-8.9%) for adolescent boys; the median positivity for gonorrhea was 5.2% (range, 3.4-10.0%) for adolescent girls and 0.9% (range, 0.7-2.6%) for adolescent boys. Of adolescent boys testing positive for chlamydial infection at three juvenile facilities, approximately 97% did not report symptoms; of adolescent boys positive for gonorrhea, 93% did not report symptoms. CONCLUSION: STD positivity among persons entering corrections facilities is high. Most chlamydial and gonococcal infections are asymptomatic and would not be detected without routine screening. Monitoring the prevalence of STDs in this population is useful for planning STD prevention activities in corrections facilities and elsewhere in the community.     

Evidence of declining STD prevalence in a South African mining community following a core-group intervention

OBJECTIVES: To reduce the prevalence of curable sexually transmitted diseases (STDs) in a South African mining community through provision of STD treatment services, including periodic presumptive treatment and prevention education to a core group of high-risk women living in areas around the mines. METHODS: Women at high risk for STDs attended a mobile clinic monthly for examination and counseling, and were treated presumptively for bacterial STDs with a directly observed 1-g dose of azithromycin. Gonococcal and chlamydial infection rates were measured by urine ligase chain reaction, and genital ulcers were assessed by clinical examination. Changes in STD prevalence among local miners were assessed through comparison of prevalence in two cross-sectional samples of miners taken 9 months apart, and through routine disease surveillance at mine health facilities. RESULTS: During the first 9 months of the intervention, 407 women used the services. Baseline prevalence of Neisseria gonorrhoeae and/or Chlamydia trachomatis in women was 24.9%; 9.7% of these women had clinical evidence of genital ulcer disease (GUD). The proportion of women with incident gonococcal or chlamydial infections at the first monthly return visit (69% follow-up rate) was 12.3%, and genital ulcers were found in 4.4% of these women. In the miner population, the prevalence of N gonorrhoeae and/or C trachomatis was 10.9% at baseline and 6.2% at the 9-month follow-up examination (P<0.001). The prevalence of GUD by clinical examination was 5.8% at baseline and 1.3% at follow-up examination (P< 0.001). Rates of symptomatic STDs seen at mine health facilities decreased among miners in the intervention area compared with miners living farther from the site and with less exposure to the project. DISCUSSION: Provision of STD treatment services to a core group of high-risk women may significantly reduce their burden of disease, and may contribute to a reduction in community STD prevalence. In the absence of sensitive and affordable screening tests for STDs in women, periodic presumptive treatment coupled with prevention education is a feasible approach to providing STD services in this population.     

Comparison of sexually transmitted disease prevalence by reported condom use: errors among consistent condom users seen at an urban sexually transmitted disease clinic

BACKGROUND: The protective effect of condom use is controversial as a result of limited data. GOAL: The goal of this study was to assess the association between condom use errors in consistent condom users and the prevalence of various sexually transmitted diseases (STDs). STUDY: We conducted a cross-sectional study of visits to an urban STD clinic between January 2001 and January 2003, by women, men who have sex with women (MSW), and men who have sex with men (MSM) by consistent condom users with or without a condom use error. METHODS: Prevalence rates were calculated for gonorrhea, chlamydia, trichomonas, nongonococcal urethritis (NGU), and pelvic inflammatory disease. Rates were stratified by reported errors in condom use over the past 4 months for consistent users with adjusted odds ratios calculated by logistic regression. RESULTS: Among 1973 consistent condom users with error information available, any condom use error was reported more commonly among women (57%) than MSW (48%), or MSM (P <0.001 for each comparison), with breakage being the most frequently reported error. Among MSW, having a condom use error was associated with gonorrhea (adjusted odds ratio [AOR], 5.53; 95% confidence interval [CI], 2.48-12.35), chlamydia (AOR, 3.19; 95% CI, 1.80-5.65), and NGU (AOR, 2.09; 95% CI, 1.45-3.01), whereas, for women and MSM, no associations were seen for any STD. CONCLUSIONS: Condom use errors were common among subjects reporting consistent condom use and for MSW, condom error was associated with a significant increased risk of STD. These data support the premise that correctness of condom use is an important methodologic issue in studies assessing condom effectiveness.     

Knowledge about sexually transmitted diseases in women among primary care physicians

OBJECTIVES: Little is known about sexually transmitted disease (STD) knowledge of primary care providers. The objectives of this study were to determine the knowledge about the management of STDs among primary care physicians and to identify physician characteristics associated with possession of STD knowledge. STUDY: A self-administered questionnaire was mailed to a random sample of 1600 obstetrician/gynecologists, pediatricians, family physicians, and internists practicing in Pennsylvania. Information on physician and patient demographics was gathered, and we assessed knowledge and practice patterns concerning the management of STDs in young women. RESULTS: Physician knowledge regarding the evaluation and management of women with or at risk for STDs was associated with female gender (odds ratio [OR]: 2.1; 95% confidence interval [CI]: 1.4-3.2), age < or =40 (OR: 2.3; 95% CI: 1.4-3.6), and metropolitan practice location (OR: 1.7; 95% CI: 1.1-2.6). Familiarity with the Center for Disease Control and Prevention's (CDC's) STD treatment guidelines was independently associated with STD knowledge (OR: 2.0; 95% CI: 1.2, 3.3). Physicians with good STD knowledge were more likely to report routinely screening at-risk women for Chlamydia trachomatis (OR: 3.9; 95% CI: 2.3-6.8). CONCLUSIONS: Inadequacies in physician knowledge may serve as a barrier to the appropriate diagnosis and treatment of STDs. Interventions to improve STD management practices should include continuing medical education and distribution of CDC's STD treatment guidelines to primary care providers.     

Seroepidemiological study of gonorrhoea in Ethiopian women. 1. Prevalence and clinical significance.

OBJECTIVE--To measure the prevalence of gonorrhoea in Ethiopian women attending gynaecologic, obstetric and family planning clinics: to determine the reliability of patient self history of sexually transmitted disease (STD); to correlate the serological diagnosis of gonorrhoea with clinical evidence of pelvic infection in order to define a reliable clinical diagnosis of gonorrhoea in a country where pelvic inflammatory disease is very common but where routine laboratory culture and serological tests for gonorrhoea are unavailable. SUBJECTS--1851 Ethiopian women: 50% symptomatic, 50% asymptomatic. SETTING--Gynaecological outpatient department, antenatal, postnatal and family planning clinics (Ethiopian Family Guidance Association (EFGA)), in two teaching hospitals and a mother and child health centre in Addis Ababa, Ethiopia. METHODS--The indirect haemagglutination test with gonococcal pilus antigen as an epidemiological tool was used in a cross-section study to screen 1851 sera for evidence of past or current gonococcal infection. The gonococcal antibody test (GAT) seropositivity was correlated with patient's history of STD, age, clinic attended and the clinical evidence of infection in "gonococcal target organs" urethra, salpinges or Bartholin glands. RESULTS--Fifty nine per cent of the study group were seropositive for the gonococcal antibody test, 22% with titres greater than or equal to 1/320, indicative of current, recent or recurrent infection. Seropositivity indicating past or present gonococcal infection was highest in those who gave a history of having had treated syphilis (85%), in women aged 40-49 (72%), and family planning attenders (EFGA) (66%) of whom 31% had titres greater than or equal to 1/320. Fifty per cent had clinical evidence of past or present infection in the urethra, salpinges or Bartholin glands. Gonococcal antibodies were present in 54% of women with no evidence of clinical infection, compared with 91% of those with pyosalpinx and 86% of those with triple infection of urethra, salpinges and Bartholin glands. CONCLUSION--The high prevalence of gonococcal antibodies in Ethiopian women, especially in asymptomatic clinic attenders must be of concern for all health workers especially those in gynaecology and obstetrics and the related disciplines of family planning and neonatal paediatrics. While seropositivity was highest in those giving a past history of syphilis, the patient's history of STD was unreliable, as of those who denied having any history of STD, fifty per cent were GAT seropositive. Despite a high correlation between GAT seropositivity with pyosalpinx and clinical evidence of infection in urethra, salpinges and bartholin glands, gonococcal antibodies were present in 54% of women with no clinical evidence of infection. Thus we were unable to define a diagnostic clinical picture of gonorrhoea in Ethiopian women.     

Spatial analysis and mapping of sexually transmitted diseases to optimise intervention and prevention strategies

OBJECTIVE: We analysed and mapped the distribution of four reportable sexually transmitted diseases, chlamydial infection/non-gonococcal urethritis (chlamydial infection), gonorrhoea, primary and secondary syphilis (syphilis), and HIV infection, for Wake County, North Carolina, to optimise an intervention. METHODS: We used STD surveillance data reported to Wake County, for the year 2000 to analyse and map STD rates. STD rates were mathematically represented as a spatial random field. We analysed spatial variability by calculating and modelling covariance functions of random field theory. Covariances are useful in assessing spatial patterns of disease locally and at a distance. We combined observed STD rates and appropriate covariance models using a geostatistical method called kriging, to predict STD rates and associated prediction errors for a grid covering Wake County. Final disease estimates were interpolated using a spline with tension and mapped to generate a continuous surface of infection. RESULTS: Lower incidence STDs exhibited larger spatial variability and smaller neighbourhoods of influence than higher incidence STDs. Each reported STD had a clustered spatial distribution with one primary core area of infection. Core areas overlapped for all four STDs. CONCLUSIONS: Spatial heterogeneity within STD suggests that STD specific prevention strategies should not be targeted uniformly across Wake County, but rather to core areas. Overlap of core areas among STDs suggests that intervention and prevention strategies can be combined to target multiple STDs effectively. Geostatistical techniques are objective, population level approaches to spatial analysis and mapping that can be used to visualise disease patterns and identify emerging outbreaks.     

Community based study of sexually transmitted diseases in rural women in the highlands of Papua New Guinea: prevalence and risk factors

OBJECTIVE: To estimate the prevalence of sexually transmitted diseases (STDs) and determine their risk factors/markers among a rural population of women in the highlands of Papua New Guinea. METHODS: Community based random cluster sample of women of reproductive age were interviewed and examined and had specimens collected for laboratory confirmation of chlamydial and trichomonal infection, gonorrhoea, syphilis, and bacterial vaginosis. RESULTS: Chlamydia trachomatis was detected in 26%, Trichomonas vaginalis in 46%, Neisseria gonorrhoeae in 1%, syphilis in 4%, pelvic inflammatory disease (PID) (diagnosed clinically) in 14%, and bacterial vaginosis in 9% of 201 women. 59% of the women had at least one STD. In a multivariate logistic regression analysis taking the clustered sampling into account, independent risk factors for chlamydial infection were age < or = 25 years, < four living children, visualization of yellow mucopurulent endocervical secretions on a white swab, and bacterial vaginosis. Being married to a man who did not have other wives was protective. For trichomonal infection, independent risk factors were having no formal education, infertility, more than one sexual partner in the previous 12 months, treatment for genital complaints in the previous 3 months, abnormal vaginal discharge detected on examination, and chlamydial infection. Similar levels of trichomonal infection were found in all age groups. Among married women, rates of infection correlated with their perception of their husband having had other sexual partners in the previous 3 months, and this relationship was significant for chlamydial infection among women over 25. CONCLUSION: STDs are a major problem in this population, with the risk factors varying by outcome. Current treatment regimens are inappropriate given the high prevalence of trichomonal infection, and the available services are inadequate. Effective interventions are required urgently to reduce this burden and to prevent the rapid transmission of HIV.