Prevalence, risk factors, and medical costs of Chlamydia trachomatis infections in Shandong Province, China: a population-based, cross-sectional study.

BACKGROUND: A population-based study of Chlamydia trachomatis (CT) infections is essential in designing a specific control program; however, no large investigation of CT infections among the general population in mainland China has been conducted since 2000. We aimed to determine the prevalence, risk factors, and associated medical costs of CT among residents, 18-49 years of age, in Shandong, China. METHODS: From May to August 2016, a multistage probability sampling survey involving 8074 individuals was distributed. Data were collected via face-to-face interviews, followed by self-administered questionnaire surveys. First-void urines were collected and tested for CT and Neisseria gonorrhoeae (NG) using nucleic acid amplification. RESULTS: The weighted prevalence of CT infection was 2.3% (95% confidence interval [CI], 1.5-3.2) in females and 2.7% (1.6-3.8) in males. Women, 30-34 years of age, had the highest prevalence of CT infections (3.5%, 2.6-4.4), while the highest prevalence of CT infections in males was in those 18-24 years of age (4.3%, 0.0-8.8). Neisseria gonorrhoeae infection had a prevalence of 0.1% (0.0-0.3) in women and 0.03% (0.0-0.1) in men. Risk factors for CT infections among females included being unmarried, divorced, or widowed (odds ratio [OR], 95% CI 3.57, 1.54-8.24) and having two or more lifetime sex partners (3.72, 1.14-12.16). Among males, first intercourse before 20 years of age (1.83, 1.10-3.02) and having two or more lifetime sex partners (1.85, 1.14-3.02) were associated with CT infections. The estimated lifetime cost of CT infections in patients 18-49 years of age in Shandong was 273 million (range, 172-374 million) China Renminbi in 2016. CONCLUSIONS: This study demonstrated a high burden of CT infections among females < 35 years of age and males < 25 years of age in Shandong. Thus, a CT infection control program should focus on this population, as well as others with identified risk factors.

Novel cost-effective quality control approach for the Cepheid Xpert CT/NG assay for the detection of Chlamydia Trachomatis and Neisseria Gonorrhoeae.

The Xpert CT/NG is a rapid assay for detection of Neisseria gonorrhoeae and Chlamydia trachomatis. QC materials must be formulated to emulate human specimens, and are prohibitively expensive. A creative, cost-effective QC approach is proposed. The acceptable sample types for the Xpert CT/NG assay were extended to include eye swabs.

Using urinary leucocyte esterase tests as an indicator of infection with gonorrhoea or chlamydia in asymptomatic males in a primary health care setting.

To evaluate a leucocyte esterase test as a predictor of gonorrhoea or chlamydia in asymptomatic Aboriginal males at the Central Australian Aboriginal Congress Male Clinic (Ingkintja), first-void urine samples and clinical information were collected from consecutive asymptomatic males presenting to the Ingkintja in Alice Springs between March 2008 and December 2009. Urine was tested immediately with a leucocyte esterase test dipstick and then by polymerase chain reaction for gonorrhoea and chlamydia. Among the 292 specimens from asymptomatic males, 15.4% were positive for gonorrhoea or chlamydia. In this group, compared with polymerase chain reaction result for gonorrhoea or chlamydia, leucocyte esterase test alone and in combination with age ≤35 years showed sensitivities of 66.7% and 60%, specificities of 90.7% and 94.7%, positive predictive values of 56.6% and 67.5%, negative predictive values of 93.7% and 92.8% and the area under receiver operating characteristics curve values of 0.79 and 0.85, respectively. Leucocyte esterase tests can reasonably be used as a basis for immediate empirical treatment for gonorrhoea or chlamydia in asymptomatic central Australian Aboriginal men under 35 years of age.

Adolescent female with urinary symptoms: a diagnostic challenge for the pediatrician.

OBJECTIVES: The objective of this study was to determine the accuracy with which physicians diagnose sexually transmitted infections (STIs) and urinary tract infections (UTIs) in adolescent females with urinary symptoms. Secondary aims were to determine the prevalence of STIs and UTIs in this subset of patients and to identify variables associated with a physician diagnosis of STI or UTI. METHODS: We performed a prospective cross-sectional study of females aged 13 to 21 years who presented to an urban pediatric emergency department with urinary symptoms. Pediatric emergency medicine physicians' diagnoses of STI or UTI were compared with the criterion standard of diagnosis. RESULTS: Of the 233 patients enrolled, 211 had complete data sets and were included for analysis. Nineteen patients (9%) had STIs. Physicians predicted STIs in 35 patients (17%), of which 9 (25%) had true infections. Sexually transmitted infections in 10 patients (53%) were underdiagnosed, in 26 patients (74%) were overdiagnosed, and in 9 patients (26%) were correctly diagnosed. One hundred twenty patients (57%) had UTIs. Physicians predicted UTIs in 156 patients (74%), of which 107 (69%) had culture-confirmed UTIs. Urinary tract infections in 13 patients (11%) were underdiagnosed, in 49 patients (31%) were overdiagnosed, and in 107 patients (66%) were correctly diagnosed. Thirteen patients (6%) had a coinfection with both an STI and a UTI. CONCLUSIONS: Pediatric emergency medicine physicians both underdiagnose and overdiagnose STIs and UTIs in patients with urinary symptoms. This diagnostic challenge necessitates that all adolescent patients presenting with urinary symptoms should be tested for STIs and UTIs and have adequate follow-up means established to ensure timely treatment.

An audit of the results of the Roche Amplicor gonorrhoea test on female genital samples--a cheaper and more sensitive method than culture in an urban English population.

We report an audit of the use of the Roche Amplicor gonorrhoea test in an urban English genitourinary (GU) medicine clinic. A number of studies have shown polymerase chain reaction (PCR) to be more sensitive than culture in detecting Neisseria gonorrhoea (NG) in genital samples. PCR also offers benefits over culture in terms of samples transport and storage requirements but cannot produce antibiotic sensitivities. In this audit, the use of both methods within an algorithm has reduced the overall cost of NG detection by approximately 30%. In all, 4.2% (99 out of 2336) of the endocervical samples were positive, but only 69% (68 out of 99) of these were also positive by culture. Urine samples showed twice as many inhibitory results as positive results: 19 (3%) inhibitory and 10 (1.5%) positive out of 662 samples. The use of the GC PCR in this protocol has been cost-saving and has increased the sensitivity of GC detection, but some results have been difficult to interpret. We hope to remedy this by the introduction of confirmatory testing for discrepant PCR results.

The cost effectiveness of gonorrhea screening in urban emergency departments.

BACKGROUND: The prevalence of gonorrhea (GC) among adolescent and young women attending some urban emergency departments (EDs) ranges from 1% to 7%, but historically screening has not been logistically practical. GOAL: The primary goal of the study was to assess the cost effectiveness of GC screening in women ages 15 to 29, seeking care in urban EDs, using noninvasive or rapid point-of-care tests. STUDY: We developed a state-transition Markov model to compare the net lifetime health consequences, costs, and cost effectiveness of routine ED care (no screening for women without genitourinary symptoms) to GC screening using 1 of 5 detection methods: Gram-stained smears of endocervical swab specimens, urine-based nucleic acid amplification tests (NAATs), NAATs performed on endocervical swabs, rapid immunochromotographic strip test (RIS) performed on clinician-collected vaginal swabs, and RIS on patient-collected vaginal swabs. RESULTS: Screening women between 15 and 29 years of age using urine-based NAATs prevented 1247 cases of pelvic inflammatory disease (PID) and saved 177 US dollars per patient compared with no screening. Compared with urine-based NAAT, screening with RIS using clinician-obtained vaginal swabs prevented an additional 220 cases of PID and had an incremental cost effectiveness ratio of 6490 US dollars per quality-adjusted life year (QALY). Results were sensitive to assumptions about loss to follow-up, gonorrhea prevalence, and test costs. CONCLUSION: Screening females aged 15 to 29 for gonorrhea in some urban EDs will prevent substantial reproductive morbidity. Screening with rapid, point-of-care tests is cost effective compared with other well-accepted preventive interventions.

Community-based chlamydia and gonorrhea screening through the United States mail, San Francisco.

BACKGROUND: Because gonococcal and chlamydial infections are often asymptomatic, disease control requires population-based screening. This report describes the feasibility of home-based testing for sexually transmitted diseases (STDs) and of specimen transport via the US mail. GOAL: This project sought to establish the efficacy and acceptability to the public of screening by means of urine kits made available in public places and mailed in for STD testing. STUDY DESIGN: Self-selected community participants obtained STD test kits from local businesses, collected urine specimens at home, and mailed kits to the health department for nucleic acid amplification testing. RESULTS: Participants picked up 209 test kits and returned 80 (38%): 3 (3.8%) of 76 were positive for gonorrhea and 1 (1.3%) of 76 was positive for chlamydia. The majority (95%) of participants were white gay men. The cost of specimen collection and transport was similar to that of other population-based screening programs. CONCLUSION: Using the mail for home-based testing for gonorrhea and chlamydia was feasible and may be a useful addition to STD control efforts.

Cost-effectiveness of five strategies for gonorrhea and chlamydia control among female and male emergency department patients.

BACKGROUND: Previous studies have shown screening for gonorrhea and chlamydia to be cost-effective for limiting the sequelae of infection and the associated costs of management. GOAL: To evaluate the cost-effectiveness of enhanced screening for gonorrhea and chlamydia in an emergency department (ED) setting. STUDY DESIGN: Five strategies were compared with use of decision analysis for theoretical cohorts of 10,000 female and 10,000 male ED patients aged 18 years to 31 years: standard ED practice, three enhanced screening strategies, and mass treatment. Main outcome measures were untreated gonorrhea or chlamydia cases and their sequelae, transmission to a partner, congenital outcomes, and cost to prevent a case. This analysis, from the perspective of the healthcare sector, included medical case costs expressed in US dollars (1999), discounted at an annual rate of 3%. RESULTS: Mass treatment was the most cost-effective strategy among women and men. Of the screening strategies for women, universal screening combined with standard practice was the most cost-effective; it was used for treating 499 more cases of gonorrhea and chlamydia than was standard practice, saving $95.70 per case treated. Standard ED practice remained the most cost-effective strategy for men under a variety of circumstances. CONCLUSION: The authors recommend urine ligase chain reaction screening for gonorrhea and chlamydia in women aged 18 years to 31 years in the ED, in conjunction with standard ED practice, to decrease the occurrence of the sequelae and costs associated with infection.

Urinary leukocyte esterase screening test for asymptomatic chlamydial and gonococcal infections in males.

We evaluated the ability of the urinary leukocyte esterase test to predict culture-verified chlamydial and gonococcal urethritis among asymptomatic adolescent males. Nine hundred forty-eight sexually active males provided first-catch urine samples for esterase screening, and 76 (8%) tested positive (greater than or equal to 1+). Among 435 boys who agreed to undergo urethral culture, the esterase was positive in 66 (15%), Chlamydia trachomatis was isolated from 39 (9%), and Neisseria gonorrhoeae was isolated from 14 (3%). The sensitivity, specificity, and positive and negative predictive values for the esterase test were 72%, 93%, and 58% and 96%, respectively. Using the esterase test to screen asymptomatic males for urethritis, we identified 38 culture-verified infections that otherwise would have remained undetected. The urinary leukocyte esterase test is a noninvasive and cost-effective screening method to detect urethritis among asymptomatic adolescent males.

Use of a leukocyte esterase dipstick to detect Chlamydia trachomatis and Neisseria gonorrhoeae urethritis in asymptomatic adolescent male detainees.

We tested 91 asymptomatic adolescent male detainees in a short-stay detention facility in Seattle, Washington for the presence of leukocyte esterase in first-catch urine and for Chlamydia trachomatis and Neisseria gonorrhoeae infection. C. trachomatis was isolated from 10 subjects (11 per cent) and N. gonorrhoeae from five (5 per cent). Dipsticks detected leukocyte esterase in the urine of all 15 subjects with either infection and of 13 subjects with neither infection. Detection of leukocyte esterase was 100 per cent sensitive, 83 per cent specific, and 54 per cent predictive for the presence of either organism.