[Chlamydia trachomatis infections--a time for action?]

Infection with Chlamydia trachomatis is the most common sexually transmitted disease in the world. In women it mainly occurs before the age of 25 years, while in men it can still be diagnosed till the age of 35 years. In Western Europe the prevalence of a Chlamydia trachomatis infection has been estimated, according to WHO data, as between 2.7% (Italy) and 8.0% (Island). A general screening strategy is now being discussed in Germany. A non-diagnosed and non-treated Chlamydia trachomatis infection and the resulting health problems have not only severe consequences for the individual but also results in major epidemiological and socio-economic public health problems. This issue is not only of extreme importance in health policy, but has also a major impact in family policy, especially in view of the declining birth rates and the demographic changes.

Rising rates of syphilis in the era of syphilis elimination

OBJECTIVE

The objective of this study was to assess the impact of syphilis control activities in King County, Washington.

STUDY DESIGN

We calculated rates of early syphilis and trends in numbers of persons tested and diagnosed through screening and partner notification from 1998 to 2005.

RESULTS

Early syphilis cases increased from 38 in 1998 to 188 in 2005 with 92% occurring among men who have sex with men (MSM). Our health department conducted public awareness campaigns, increased publicly financed syphilis screening among MSM by 179%, and intensified partner notification efforts. Despite these efforts, the prevalence of syphilis among screened populations was only 1.1%, and 71% syphilis cases were diagnosed after seeking care for symptoms. The proportion of cases diagnosed through screening and partner notification did not significantly change during the evaluation period. Early syphilis incidence among MSM more than doubled between 2003 and 2005.

CONCLUSIONS

New, innovative approaches to syphilis control are needed.

Acceptability of urine-based screening for Chlamydia trachomatis to asymptomatic young men and their providers

OBJECTIVE

The objective of this study was to describe acceptability of urine chlamydia testing among asymptomatic men and providers' attitudes toward testing.

STUDY DESIGN

Asymptomatic men (no urethral discharge/dysuria) were offered free testing and characteristics of men who accepted were compared with those who declined. Acceptability logs tallied the proportion who accepted, and a standardized survey was administered to providers at study's end.

RESULTS

Median acceptance was 64% (range, 8-100%). Men accepting were younger and more likely to be in adolescent primary care or detention, to report higher numbers of recent partners, no prior sexually transmitted disease, time to last healthcare visit >1 year, and to have received an incentive. Provider-reported barriers to testing included difficulty in conveying importance of testing to asymptomatic men (65%) and time constraints (24%).

CONCLUSIONS

Asymptomatic men are likely to accept testing depending on venue and approach. However, barriers exist for men and providers, even when testing is free.

Sexually transmitted infections and risk factors among truck stand workers in Dhaka, Bangladesh

OBJECTIVE

This study was conducted to determine the prevalence of selected sexually transmitted infections (STIs) and their risk factors among workers in and near a truck stand in Dhaka, Bangladesh.

STUDY DESIGN

A random sample of 696 men and 206 women were recruited into a cross-sectional study using a census that enumerated transport agents, motor mechanics, laborers, and vendors in Tejgaon truck stand.

RESULTS

The prevalence rates of syphilis (rapid plasma reagin and Treponema pallidum hemagglutination), gonorrhea (polymerase chain reaction [PCR]), and chlamydial infections (PCR) among men were 4.1%, 7.7%, and 2.3%, respectively, and among women were 2.9%, 8.3%, and 5.2%. Multivariable analysis revealed that having >or=2 sex partners in the last month, never using a condom with sex workers, and ever injecting narcotics were significant predictors of STI among men. Being never married, working as a laborer, older age, and living within the truck stand were significant predictors of practicing high-risk behaviors among men, but none predicted infection with STIs.

CONCLUSIONS

Both behavioral and STI data suggest that truck stand workers should be included in the STI/HIV intervention programs.

Why do we need quality-assured diagnostic tests for sexually transmitted infections?

The bacterial sexually transmitted infections (STIs) syphilis, gonorrhoea and chlamydia can all be cured with a single dose of antibiotic. Unfortunately, however, these infections often remain undiagnosed as many infected individuals have few if any symptoms. Diagnostic tests with high sensitivity and specificity are available for all three infections but, owing to their expense and the lack of laboratory capacity, most people in developing countries do not have access to these tests. There is a great need for simple, cheap diagnostic tests for STIs that can be performed at the point of care, enabling treatment to be given immediately. It is hoped that recent advances in our understanding of the pathogenesis of these infections, and the availability of the complete genome sequences for each causative organism, will lead to the development of improved point-of-care tests that will reduce the burden of these diseases in developing countries.

[Sexually transmitted infections in the XXI century]

Sexually transmitted infections in the XXI century. The most important measurements in the management of sexually transmitted diseases are discussed. Course and incidence of classical venereal diseases, especially that of syphilis are detailed. In 2004 the incidence of early infectious syphilis significantly increased and it is emphasized that this tendency can be observed also in 2005. Differential diagnostic issues of male and female urogenital diseases with discharge are reviewed, and problems of STDs of viral origin (genital herpes, genital warts, HIV infection) are briefly discussed. The importance of careful and specific microbiological diagnostics in the management of patients with venereal diseases and other sexually transmitted infections is emphasized.

Prevalence of chlamydial genital infection and associated risk factors in adolescent females at an urban reproductive health care center in Croatia

The study was undertaken to determine the prevalence of chlamydial genital infection in sexually active, urban adolescent females 15-19 years; to identify behavioral, demographic, and clinical factors associated with chlamydial infections; and to develop criteria for potential screening strategies. 500 adolescent women, median age 17.7 years, who visited gynecological outpatient clinic in Children's Hospital Zagreb for different reasons were enrolled in this study. Gynecological exam, colposcopy, detection of chlamydial infection by the rapid direct immunoassay of endocervical swab (Clearview Chlamydia-Unipath), endocervical cytological examination--Papanicolaou smear, and questionnaire to obtain demographic, social, behavioral and presence of symptoms data were performed. Positive Chlamydia trachomatis test were found in 16.4% of participants, cytologic cervical abnormalities--cervical intraepithelial neoplasia (CIN I-CIN III) were found in 25.2% and cytological signs of Human papilloma virus were found in 11.4%. Stepwise multivariate logistic regression analysis identified five factors associated with infection: the age of menarche < or =13 years, > or =4 lifetime sexual partners, non-use of contraception (rare or never), cervical friability, and abnormal Papanicolaou test. Urban adolescent sexually active women are at high risk for chlamydial infection and other sexually transmitted diseases including HIV infection. Association between chlamydial genital infection and risk-taking sexual and contraceptive behavior was found. Routine Chlamydia trachomatis testing for this population is recommended as well as implementation of school based sexual health education because of their risk-taking sexual behavior.

Why do we need quality-assured diagnostic tests for sexually transmitted infections?

The bacterial sexually transmitted infections (STIs) syphilis, gonorrhoea and chlamydia can all be cured with a single dose of antibiotic. Unfortunately, however, these infections often remain undiagnosed as many infected individuals have few if any symptoms. Diagnostic tests with high sensitivity and specificity are available for all three infections but, owing to their expense and the lack of laboratory capacity, most people in developing countries do not have access to these tests. There is a great need for simple, cheap diagnostic tests for STIs that can be performed at the point of care, enabling treatment to be given immediately. It is hoped that recent advances in our understanding of the pathogenesis of these infections, and the availability of the complete genome sequences for each causative organism, will lead to the development of improved point-of-care tests that will reduce the burden of these diseases in developing countries.

Lymphogranuloma venereum in the United kingdom

BACKGROUND

Over the past 2 years, lymphogranuloma venereum (LGV), caused by L serovars of Chlamydia trachomatis, has emerged as a significant problem among men who have sex with men (MSM). We report on, to our knowledge, the largest case series of LGV to date, with detailed epidemiological and clinical characteristics of the epidemic in the United Kingdom.

METHODS

A national diagnostic service and surveillance system was established in October 2004. Cases were confirmed by the presence of C. trachomatis and an LGV serovar (L1, L2, or L3) from genotyping. For confirmed cases, an enhanced surveillance questionnaire was sent to the clinician.

RESULTS

Through February 2006, a total of 327 cases of LGV were confirmed. Cases were diagnosed across the United Kingdom, with the majority from London (71%) and Brighton (13%). Case reports were received for 282 MSM. The majority (96%) had proctitis, many with severe local and systemic symptoms. There was a high level of coinfection with human immunodeficiency virus (76%), hepatitis C (19%), and other sexually transmitted infections (39%). Nine cases of human immunodeficiency virus infection were diagnosed around the same time as LGV. Most cases were acquired within the United Kingdom, although patients with early cases were more likely to report contacts in The Netherlands.

CONCLUSIONS

We found a significant burden of this once-rare sexually transmitted infection among MSM in the United Kingdom. LGV may be contributing to the epidemic of human immunodeficiency virus infection by facilitating transmission. Further control efforts are required, including awareness campaigns, continued detailed surveillance, and expanded chlamydia testing among MSM.

Genital ulcer disease in central Australia: predictors of testing and outcomes

OBJECTIVES

To identify factors associated with the uptake and outcome of testing for infectious causes of genital ulcer disease (GUD) in central Australia.

METHODS

Prospective investigation of GUD cases in central Australia from February 2002 to August 2003. Data were collected from primary health care clinics in remote indigenous communities of Central Australia.

RESULTS

During the study period, 134 cases of GUD were reported and investigated. Of these cases, 71 (53%) were in women (age range 14-75, median 28) and 63 (47%) in men (14-63, median 28). Testing for syphilis was undertaken for 111 (82.8%) cases, 75 (56%) were tested for herpes simplex virus infection, and 82 (61.2%) for donovanosis. Testing for at least one of the three sexually transmissible pathogens of interest was undertaken in 128 (95.5%) cases, while 99 (73.9%) were tested for two pathogens and 41 (30.6%) for all three agents. Of subjects tested, 19.8% had new syphilis infection, 51% had herpes simplex virus infection and 7% had donovanosis. In 19 of 41 (46.3%) subjects fully investigated no cause for genital ulceration was found.

CONCLUSION

This study provides the first quantitative description of GUD diagnosis in central Australia. Logistic constraints limited the systematic application of diagnostic tests. Current treatment protocols may need to be reassessed in light of the higher than expected detection of genital herpes as a cause of GUD.

Acceptability of self-taken vaginal swabs and first-catch urine samples for the diagnosis of urogenital Chlamydia trachomatis and Neisseria gonorrhoeae with an amplified DNA assay in young women attending a public health sexually transmitted disease clinic

OBJECTIVES

Public health efforts are needed to encourage young women to get tested for Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (GC).

GOAL

To assess the acceptability and feasibility of 2 noninvasive diagnostic approaches.

STUDY DESIGN

Participants of this cross-sectional survey were 413 young women (age 16-35) who underwent STD testing by self-taken vaginal swab (SVS) and a first-catch urine sample (FCU) by nucleic acid amplification test (BDProbTec) and filled out a questionnaire.

RESULTS

CT and GC were diagnosed in 10.9% (45/413) and 1.5% (6/413). Eleven percent of the participants who never previously had an STD examination (68%) tested STD positive. SVS and FCU were almost uniformly reported as easy to perform and preferred above gynecologic examination.

CONCLUSIONS

Using SVS combined with FCU can be an important enhancing tool in public health approaches. Acceptability among potential patients is high, enabling the noninvasive detection of STDs that would otherwise remain undetected and untreated.

Mycoplasma genitalium as a sexually transmitted infection: implications for screening, testing, and treatment

The evidence that Mycoplasma genitalium is a sexually transmitted pathogen is virtually incontrovertible based on both the concordance rates among partners and on DNA typing showing the same sequence type among partners in contrast to unrelated M genitalium positive patients. The implications that this has for the screening, testing, and treatment of patients is less certain however. Which tests are the most sensitive and specific, what samples are most appropriate, who should be tested, what treatment is best and how should partners be managed?

Prediction of pelvic inflammatory disease among young, single, sexually active women

OBJECTIVES

To assess prediction strategies for pelvic inflammatory disease (PID).

STUDY DESIGN

One thousand one hundred seventy women were enrolled based on a high chlamydial risk score. Incident PID over a median of 3 years was diagnosed by either histologic endometritis or Centers for Disease Control and Prevention criteria. A multivariable prediction model for PID was assessed.

RESULTS

Women enrolled using the risk score were young, single, sexually active, and often had prior sexually transmitted infections. Incident PID was common (8.6%). From 24 potential predictors, significant factors included age at first sex, gonococcal/chlamydial cervicitis, history of PID, family income, smoking, medroxyprogesterone acetate use, and sex with menses. The model correctly predicted 74% of incident PID; in validation models, correct prediction was only 69%.

CONCLUSIONS

Our data validate a modified chlamydial risk factor scoring system for prediction of PID. Additional multivariable modeling contributed little to prediction. Women identified by a threshold value on the chlamydial risk score should undergo intensive education and screening.

Cervicitis and Genitourinary Symptoms in Women Culture Positive for Mycoplasma genitalium

PROBLEM

Mycoplasma genitalium has been associated with male urethritis. We sought to relate M. genitalium to genitourinary signs and symptoms in women.

METHOD OF STUDY

We compared 26 culture-positive women (group 1), 257 additional polymerase chain reaction-positive women (group 2), and 107 negative control women. We used logistic regression to evaluate signs and symptoms, controlling for co-infections, pregnancy, age, and intervention group assignment.

RESULTS

Comparing group 1 with controls, we found significantly elevated odds ratios (ORs) for intermediate vaginal discharge (OR = 5.4; 95% confidence interval 1.01, 29.2) and action in response to discharge [3.9 (1.1, 13.5)]. Non-significant increases were observed for pathologic vaginal discharge [3.8 (0.78, 18.2)], pathologic dyspareunia [1.5 (0.25, 9.0)], vaginal odor [2.1 (0.75, 5.7)], and cervical mucopus [4.1 (0.74, 22.4)]. Group 2 results were similar, but showed no increase in cervical mucopus relative to controls.

CONCLUSION

Infection with M. genitalium in women is independently related to increased genitourinary symptomatology.

Gender-based differences in fertility beliefs and knowledge among adolescents from high sexually transmitted disease-prevalence communities

PURPOSE

Limited information is available about adolescents' beliefs about fertility in women and its link to sexually transmitted disease (STD) and whether men and women differ in their beliefs. This information may be useful for developing messages intended to motivate youth to seek STD screening while they are asymptomatic. The purpose of this study was to examine gender-based differences in fertility beliefs and knowledge.

METHODS

Data were derived from the Adolescent Health Study, a population-based telephone survey study in which urban household adolescents from a high STD-prevalence community were queried about their sexual experience, fertility-related knowledge, beliefs related to timing of childbearing, and risk assessment of future fertility problems. Chi2 and regression analyses were used to evaluate group differences.

RESULTS

The majority of adolescents reported that having children was somewhat or very important, but that the 15- to 19-year-old age group was not the optimal time for a woman to have a child. Regression analyses indicated that female adolescents were more likely than male adolescents to identify chlamydia and pelvic inflammatory disease as causes of fertility problems. Seventy-two percent of adolescent girls thought there was some chance they would have future fertility problems and 58% thought they had little or no control over developing fertility problems in the future.

CONCLUSION

Additional health education is needed if we are to motivate adolescents to participate in asymptomatic STD screening programs. Involving male adolescents may be a more significant challenge given that fewer male adolescents understand the link between female fertility and common STD-related conditions. Given our findings, fertility preservation may be a valuable teaching tool and social marketing agent for STD prevention in adolescents.

Prevalence of sexually transmitted infections among adolescents in Kampala, Uganda, and theoretical models for improving syndromic management

PURPOSE

To estimate the prevalence of treatable sexually transmitted infections (STI) in adolescents visiting a youth health clinic. To evaluate the algorithm for management of the abnormal vaginal discharge (AVD) syndrome recommended in Uganda's national guidelines and compare it with other theoretical flowchart models.

METHODS

Sexually experienced adolescents who were visiting an urban youth health clinic in Kampala, Uganda were examined and interviewed (with their consent) about their socio-demographic background, sexual risk factors, and genital symptoms. Samples taken for Chlamydia trachomatis (CT), Neisseria gonorrhoea (NG), and Trichomonas vaginalis (TV) were analyzed by polymerase chain reaction (PCR). Rapid plasma reagin (RPR) was used with confirming treponema pallidum hem agglutination (TPHA) for syphilis diagnosis. One hundred ninety-nine females and 107 males were examined. Performance of the national algorithm was compared with different theoretical algorithms.

RESULTS

Prevalence of CT, NG, TV and syphilis was 4.5%, 9.0%, 8.0%, and 4.0%, respectively, for girls and 4.7%, 5.7%, 0%, and 2.8%, respectively, for boys. We found that 20.6% of the females and 13.2% of the males had at least one STI. The national AVD flow chart had a sensitivity of 61%, a specificity of 38.5% and a positive predictive value (PPV) of 11.6%. All the models had PPV of less than 20% and sensitivity less than 85%. The best performing algorithm using risk and protective factors, rather than symptoms, implicated a sensitivity/specificity and PPV of 82.6%/47% and 17.3%, respectively (p = .012).

CONCLUSIONS

An algorithm for management of STI using behavioral and demographic factors in this population demonstrated enhanced sensitivity, specificity, and PPV.

Patterns of sexually transmitted infections in adolescents and youth in Dar es Salaam, Tanzania

BACKGROUND

Syndromic management of STIs has been advocated as simplified and cheap approach. Youth have been reported to be at increased risk of acquiring STIs which can facilitate HIV transmission. We have investigated the relationship between the syndromic management and specific aetiology diagnosis and its relationship with HIV infection and health seeking behaviour among youth attending a reproductive health clinic in Dar es Salaam, Tanzania.

METHODS

Between September 1998 and February 1999 among 1895 adolescents and youth below 25 years seen in the clinic 199 (10.5%) were randomly selected and consented to participate in the study. A standard questionnaire was administered. Blood and vaginal or urethral specimens were taken and investigated for STI causative agents.

RESULTS

Among a total of 199 studied adolescents and youth 22.6 % were teenagers, with fewer females 17.8% than males; 27.5% (p < 0.018). 20.8% of the females compared to 11.5% in males were HIV infected. Genital discharge was the most common complaint which was reported in 54.1% of male and 63.4 % of female patients. All males with gonorrhoea and four out of five with Chlamydia were given appropriate treatment with syndromic management, while 28% women with gonorrhoea or Chlamydia received appropriate treatment by syndromic management. All patients found with active syphilis by serology had not complained of genital ulcers and would not have been assigned to syndromic treatment for syphilis at the initial visit.

CONCLUSION

The burden of STIs in this youth population is large indicating that youth are at increased risk of STIs and will certainly require youth friendly clinics. There is a need to refine the current syndromic management guidelines.