Urine-based Nucleic Acid Amplification Research Articles

Screening for STIs among criminal legal system involved youth of color in community settings

BackgroundSexually transmitted infections are a significant, and growing, public health problem in this country – particularly among youth. Innovative strategies are needed to reduce the community burden of infection. Preliminary studies indicate that individuals involved in the criminal legal system have high rates of infection. While gaps exist in providing screening for incarcerated individuals, there are minimal efforts that have been initiated to screen individuals diverted from incarceration. In this study, we examined the STI risk profile and feasibility of screening for sexually transmitted infections for youth who were attending an alternative sentencing program after arrest for a minor offense. Youth were screened for chlamydia and gonorrhea using urine-based nucleic acid amplification tests.ResultsOf the 307 participants engaged in a program providing supportive services for criminal legal system involved youth at the Brooklyn Court House in New York City, 186 agreed to screening for sexually transmitted infections, and 8% were positive for chlamydia, gonorrhea, or both.ConclusionsScreening programs within carceral settings have proven effective in identifying individuals with STIs. However, with policy changes diverting more young people away from incarceration and into community-based programs, innovative programs are needed to identify STIs among youth in these settings. Our findings indicate that it is feasible to conduct venue-based screening in these settings, and, doing so may identify youth in need of treatment and further evaluation.

Extragenital Chlamydia and Gonorrhea in Young Black Men Who Have Sex With Men: Missed Treatment Opportunities for Human Immunodeficiency Virus-Infected Men Who Have Sex With Men?

This study of young black men who have sex with men (YBMSM) assessed the prevalence of extragenital chlamydia and gonorrhea among those testing negative for urethral infections, and compared prevalence of both by human immunodeficiency virus (HIV) status. A convenience sample of 609 YBMSM was recruited for a cross-sectional study from 2 sexual health clinics located in Jackson, MS. To detect Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG), nucleic acid amplification testing was performed on urine, rectal swabs, and oral swabs. OraSure was used to detect HIV. Seventy-three percent of all chlamydia infections and 77% of gonorrhea infections were found from anal and oral swabs in the absence of urethral positivity. Compared with HIV-uninfected men, HIV-infected men were significantly more likely to have pharyngeal chlamydia (P = 0.03), multiple CT infections (P = 0.02), rectal NG (P < 0.001), multiple NG infections (P = 0.04), both CT/NG rectal infections (P = 0.001). As much as three quarters of all chlamydia and gonorrhea infections may be missed when only urine-based nucleic acid amplification testing is used to screen YBMSM for bacterial sexually transmitted infections. These missed opportunities for diagnosis may be particularly likely among HIV-infected YBMSM.

Modest rise in chlamydia and gonorrhoea testing did not increase case detection in a clinical HIV cohort in Ontario, Canada

ObjectivesWe described patterns of testing for chlamydia and gonorrhoea infection among persons in specialty HIV care in Ontario, Canada, from 2008 to 2011.MethodsWe analysed data from 3165 participants in the...

Chlamydia and Gonorrhea Screening Using Urine-Based Nucleic Acid Amplification Testing Among Males Entering New York City Jails

This article describes a pilot screening program to detect Chlamydia trachomatis (Ct) and Neisseria gonorrhoeae (Ng) sexually transmitted infections (STIs) in adolescent and adult males newly incarcerated in New York City jails using urine-based nucleic acid amplification technology (NAAT). Between December 8 and 22, 2003, 2,417 males were tested; 162 (6.7%) were found positive for Ct and/or Ng STIs, with 138 (86.8%) exhibiting no STI signs or symptoms and 102 (63%) treated prior to jail release. Younger age, positive urine leukocyte esterase test, and ≥11 recent sex partners were predictors of STI. Urine-based screening and treatment was feasible in this setting and identified STI that would otherwise have been undetected. Jails may thus be important venues for targeted male STI screening.

Prevalence and risks for sexually transmitted infections among a national sample of migrants versus non-migrants in China

This study aims to describe and compare the gender-specific prevalence of chlamydia and gonorrhoea, sexual behaviours and experiences, and risk factors associated with sexually transmitted infections (STIs) among migrants versus rural and urban non-migrants in China. Data were abstracted from the Chinese Health and Family Life Survey conducted from 1999 to 2000, which provided a nationally representative adult (ages 20-64 years) sample. STI results were determined using a urine-based nucleic acid amplification assay. The prevalence of chlamydia for migrant women was triple that of rural non-migrant women. Migrants were more likely to engage in STI-associated risk behaviours than non-migrants (e.g. receiving money for sex). Among migrants, women were more likely than men to have STIs. The high STI prevalence among migrants highlights an urgent need to implement comprehensive prevention and intervention programmes targeting the cultural, social and structural needs of migrants in the city, especially migrant women.

Sexually Transmitted Infections Among Patients With Acute HIV in North Carolina

Sexually transmitted infections (STIs) have a well-established synergistic relationship with HIV infection. Co-infection with HIV and an STI can increase the probability of HIV transmission to an uninfected partner by increasing HIV concentrations in genital lesions, genital secretions, or both.[1, 2] STI infection can also increase the likelihood of HIV acquisition by interrupting mucosal barriers, increasing the access to and concentration of HIV receptor cells, and, in women, changing the vaginal microflora to favor HIV infection.[3–6] Among patients with acute HIV (AHI), the 4–6 week interval in the HIV disease course when the virus can be detected in the blood prior to seroconversion, co-infection with an STI may be common.[7] More than 70% of AHI patients had an STI co-infection in a Malawian sexually transmitted disease (STD) clinic in two separate studies.[8, 9] However, little is known about the frequency of STI and acute HIV infection co-infection outside of the STD clinic setting.

Rate and Predictors of Repeat Chlamydia trachomatis Infection Among Men

Chlamydia trachomatis (Ct) infection, especially repeat infection, is associated with serious sequelae among women, including pelvic inflammatory disease, ectopic pregnancy, and infertility. There are few reports evaluating repeat infection and predictors among men treated for Ct infection. To measure the predictors and incidence of repeat Ct infection among men. Men 15 to 35 years of age were screened for Ct infection in different venues in Baltimore, Denver, and San Francisco using urine-based nucleic acid amplification tests. Men with Ct infection were evaluated for repeat Ct infection from February 2001 until September 2003. Enrolled men had a baseline, 1-month, and 4-month follow-up visit and were tested for Ct infection at each visit. Project staff sought to locate and notify all female sex partners of infected men during the study to provide testing and treatment. We evaluated predictors of repeat Ct infection, time to infection, and incidence of infection. Three hundred fifty-nine men were recruited into the study and 272 (76%) had at least 1 follow-up visit with Ct results. Repeat infection occurred in 13% of men with Ct infection; there was no significant difference in repeat infection by site (Denver 13%, Baltimore 13%, San Francisco 12%). Independent predictors of repeat infection were history of an STD and venue. Incidence of repeat infection was 45.4 infections per 100 person years. Repeat Ct infection is common among men and similar in geographically distinct cities. Incidence of repeat Ct infection support routine rescreening of men within the first 3 months after Ct infection.

Screening Asymptomatic Adolescent Men for Chlamydia trachomatis in School-Based Health Centers Using Urine-Based Nucleic Acid Amplification Tests

Urine-based screening for Chlamydia trachomatis using highly sensitive and specific nucleic acid amplification tests offers a unique opportunity to screen men attending school-based health centers. As part of a large multicenter chlamydia screening project in men, 1434 students were enrolled; 1090 in high schools in Baltimore and 344 middle and high-school students in Denver. Students were screened for chlamydia using urine-based nucleic acid amplification tests at well adolescent visits, acute care visits, or visits for other reasons, such as sports physicals. A self-administered survey to ascertain sexual risk behaviors was used. Data were analyzed separately for Baltimore and Denver, with univariate and multivariate logistic regression analysis. The overall prevalence in asymptomatic adolescent men was 6.8% (7.5% in Baltimore and 4.7% in Denver, P = n.s.). Students in Denver were older, more racially diverse, and more likely to have had intercourse in the previous 2 months than students in Baltimore. Students in Baltimore were more likely than those in Denver to have used a condom at last intercourse with casual and main partners. Among men in Denver but not Baltimore, condom use at last intercourse with both casual (OR 0.15, 95% CI, 0.03, 0.78) and main partners (OR 0.30, 95% CI, 0.10, 0.91) was protective against infection. The only risk factor for CT infection in Baltimore students was age (OR 1.47, 95% CI, 1.23, 1.75). In multivariate analysis that included age (as a continuous variable), race, history of an STI, any sex partner in the last 2 months, >1 sex partner in the past 12 months, a new partner in the last 2 months, and condom use with last main and last casual partner, age (adjusted odds ratio 1.34, 95% CI, 1.11, 1.62) and black race (adjusted odds ratio 2.37, 95% CI, 1.21, 4.63) were the only variables associated with testing chlamydia positive. School-based health centers are important venues in which to perform urine-based screening for chlamydia in sexually active, asymptomatic males, especially in high prevalence communities, and such screening provides the opportunity to identify and treat substantial numbers of chlamydia infections.

Prevalence of Neisseria gonorrhoeae Among Men Screened for Chlamydia trachomatis in Four United States Cities, 1999–2003

Neisseria gonorrhoeae infections are the second most commonly reported disease in the United States and cause significant morbidity. We describe the prevalence of gonorrhea in a large sample of men tested for gonorrhea and Chlamydia trachomatis in Baltimore, Denver, San Francisco, and Seattle. Gonorrhea prevalence was measured among 17,712 men tested in a variety of non-sexually transmitted disease (STD) clinic venues using urine-based nucleic acid amplification tests. Among 16,850 asymptomatic men, prevalence ranged from 0% to 1.5% by city (P=0.20): Baltimore 1.3%, Denver 1.5%, San Francisco 1.5%, and Seattle 0%. Among 862 symptomatic men, the gonorrhea prevalence varied from 0.0% to 28.3% by city (P<0.01). The high prevalence of gonorrhea in symptomatic men supports the importance of testing for symptomatic men. The prevalence of gonorrhea among asymptomatic men is low, and routine screening cannot be recommended when screening is performed for chlamydia, unless a substantial local prevalence of gonorrhea can be documented in specific targeted venues or population groups.

Consultation with the Specialist: Dysmenorrhea

1. Paula J. Adams Hillard, MD* 1. *Professor, Department of Obstetrics & Gynecology and of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio After completing this article, readers should be able to: 1. Recognize the prevalence of dysmenorrhea in adolescents and its common results. 2. Describe a menstrual history that is most consistent with primary dysmenorrhea. 3. List the mediators of uterine pain and contractions believed to be involved in the pathophysiology of primary dysmenorrhea. 4. Recommend the appropriate evaluation and management of primary dysmenorrhea, including the appropriate choice and dosing of both over-the-counter and prescription medications. 5. Recognize patients who should be referred for evaluation of possible causes of secondary dysmenorrhea. A 15½-year-old girl came to the office with complaints of the recent onset of painful menstrual periods. She experienced her first menstrual period at the age of 13 years and except for an occasional mildly uncomfortable menstrual period, had not experienced significant pain until recently. She reported regular monthly menses, although she did not write down the dates. She described additional symptoms that also had not been present previously, including headache, loose stools, and breast tenderness. She has tried several over-the-counter medications, including acetaminophen, without significant relief. She has missed 3 days of school in the last 6 weeks because of these complaints. She is otherwise healthy, having no major illnesses, no history of surgeries, and no other genitourinary complaints. There is no family history of endometriosis; severe dysmenorrhea; menorrhagia; irregular periods; infertility; uterine fibroids; or breast, ovarian, colon, or uterine cancer. Her mother recalled that she had been prescribed oral contraceptives at the age of 16 years to alleviate her severe menstrual cramps. When spoken with privately, having been assured confidentiality, the girl denied sexual activity or abuse. She was doing well in school, making As and Bs, and felt that the relationship with her parents and one sister were good. She reported that she experienced crampy midline lower abdominal pain that began with the …

Sexually transmitted diseases in incarcerated adolescents

The objectives of this review are to summarize recent developments in the epidemiology of sexually transmitted disease in incarcerated adolescents and to review screening and treatment recommendations for sexually transmitted disease in juvenile corrections facilities. The introduction of non-invasive, urine-based nucleic acid-amplification tests for chlamydia and gonorrhea has led to a dramatic increase in the ability to screen for chlamydia and gonorrhea in non-traditional settings, including corrections facilities. The prevalence of chlamydia and gonorrhea has been uniformly high in incarcerated adolescents. The prevalences of chlamydia and gonorrhea in adolescents aged 18-19 years incarcerated in adult corrections facilities were higher than those incarcerated in juvenile facilities. The prevalence was higher in incarcerated adolescent women than adolescent men and in black adolescents than non-black adolescents. Screening for chlamydia in incarcerated adolescents has been shown to be a cost-effective strategy for preventing adverse health consequences. Syphilis prevalence in incarcerated adolescents is relatively low. Hepatitis B is relatively common among incarcerated adolescents. The high prevalence of chlamydia in incarcerated adolescents and gonorrhea in incarcerated adolescent women suggests that screening of these populations should be a priority. The reasons for the higher prevalence of chlamydia and gonorrhea in young adults aged 18-19 years incarcerated in selected adult corrections facilities compared with those incarcerated in juvenile facilities should be investigated. Hepatitis B virus vaccination in juvenile correction facilities is recommended to prevent and control the transmission of this disease.

Cost-effectiveness analysis of screening adolescent males for Chlamydia on admission to detention.

Chlamydia trachomatis infections can lead to serious and costly sequelae. Because chlamydia is most often asymptomatic, many infected youth do not seek testing. Entry to a detention system provides an opportunity to screen and treat many at-risk youth. GOAL The goal of this study was to determine the cost-effectiveness of screening male youth for chlamydia on entry to detention. Incremental cost-effectiveness of 3 chlamydia screening strategies was compared for a hypothetical cohort of 4000 male youth per year: 1) universal chlamydia screening using a urine-based nucleic acid amplification test (NAAT), 2) selective NAAT screening of urine leukocyte esterase (LE)-positive urines, and 3) no screening. The model incorporated programmatic costs of screening and treatment and medical cost savings from sequelae prevented in infected males and female partners. The analysis was conducted from the healthcare system perspective. Chlamydia prevalence in the sampled population of 594 was 4.8%, and the average number of female sexual partners/infected male was 1.6. Universal NAAT screening was the most cost-effective strategy, preventing 37 more cases of pelvic inflammatory disease (PID) and 3 more cases of epididymitis than selective screening and saving an additional 24,000 dollars. The analysis was sensitive to NAAT cost, LE sensitivity, rate of PID development, PID sequelae cost, and number of female partners. Universal screening remained the most cost saving for prevalence as low as 2.8% or higher. Universal chlamydia screening of adolescent males on entry to detention was the most cost-effective strategy. Savings are primarily the result of the prevention of PID in recent and future partners of index males. Screening detained male youth using a urine-based NAAT provides a public health opportunity to significantly reduce chlamydia infections in youth at risk for sexually transmitted diseases.

Evaluation of Vaginal Infections in Adolescent Women: Can It Be Done Without a Speculum?

Objective Given that highly sensitive urine-based nucleic acid amplification tests may eliminate the need for speculum exam to diagnose gonorrhea and chlamydia cervicitis, we sought to determine if vaginal infections could be diagnosed without using a speculum. Methods Matched pairs of vaginal specimens were collected from participants before and during speculum exam for diagnosis of trichomoniasis, bacterial vaginosis, and vulvovaginal candidiasis. Females age 12 to 22 years presenting to the Johns Hopkins adolescent primary care clinics who required a pelvic examination were eligible to participate. A convenience sample of 686 patients was recruited between July 1995 and August 1996. Paired vaginal specimens were evaluated with blinded microscopic evaluation. Analysis consisted of: 1) comparison of collection method sensitivities; and 2) assessment of proportions of infections detected by one method that were also detected by the other method. Results Sensitivities of speculum and nonspeculum collection methods were 75% and 77% (difference = -2%; 95% confidence interval, -11%, 7%) for trichomoniasis, 64% and 68% (difference = -4% [-10%, 3%]) for bacterial vaginosis, and 85% and 80% (difference = 5% [-12%, 22%]) for vulvovaginal candidiasis. The speculum method identified 88% (trichomoniasis), 90% (bacterial vaginosis), and 81% (vulvovaginal candidiasis) of infections detected by the nonspeculum method. The nonspeculum method identified 91% (trichomoniasis), 95% (bacterial vaginosis), and 76% (vulvovaginal candidiasis) of infections detected by the speculum method. Conclusions Vaginal infections can be adequately diagnosed without a speculum. Once urine-based diagnosis of gonorrhea and chlamydia becomes well established, it may be possible to perform evaluations for uncomplicated genitourinary complaints without using a speculum.

Nongonococcal urethritis--a new paradigm.

Urethritis in men has been categorized historically as gonococcal or nongonococcal (NGU). The major pathogens causing NGU are Chlamydia trachomatis and Ureaplasma urealyticum. Trichomonas vaginalis may be involved occasionally. In up to one-half of cases, an etiologic organism may not be identified. In this review we present recent advances in the diagnosis and management of NGU and discuss how they may be applied in a variety of clinical settings, including specialized STD clinics and primary health care practices. In particular, the development of the noninvasive urine-based nucleic acid amplification tests may warrant rethinking of the traditional classification of urethritis as gonococcal urethritis or NGU. Diagnostic for Chlamydia are strongly recommended because etiologic diagnosis of chlamydial urethritis may have important public health implications, such as the need for partner referral and reporting. A single 1-g dose of azithromycin was found to be therapeutically equivalent to the tetracyclines and may offer the advantage of better compliance.

Diagnosis of Vaginal Infections Without a Speculum.

Sensitive urine-based nucleic acid amplification tests have been developed that may obviate the need for speculum exams to diagnose gonorrhea and