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Objective To examine syphilis testing capacity, screening coverage rates and types of syphilis tests used in medical facilities in southern China. Methods Eleven of the 14 municipalities in Guangdong province participated. Data on syphilis testing capacity, screening coverage and types of syphilis tests used were collected from all types of public medical facilities offering prenatal care (n = 109). A total of 494 680 women who delivered during 2004-2008 were studied. Findings In 2008, 54196 pregnant women (43.1%) were not screened for syphilis. Among such women, 32 863 (60.6%) attended clinics without any syphilis testing capacity and 21 333 (39.4%) attended clinics that performed testing but were not screened. The likelihood of not having syphilis test capacity was much higher for hygiene stations (odds ratio, OR: 10; 95% confidence interval, CI: 4-25), services at the township level (OR: 33; 95% CI: 10-100) and services with [less than or equal to] 1000 deliveries per year (OR: 1.002; 95% CI: 1.001- 1.003). These same service characteristics correlated with lower screening coverage rates (P < 0.01). Only one antenatal clinic had the capacity to conduct both treponemal and non-treponemal tests for diagnosing syphilis. Conclusion Syphilis screening is available in very few of the basic medical facilities offering prenatal care where most neonates in southern China are delivered. In light of this and of the increasing incidence of syphilis in the area, expanding point-of-care rapid syphilis testing is a priority. Objectif Etudier la capacite a effectuer le depistage de la syphilis, les taux de couverture du depistage et les types de tests syphilitiques utilises dans les etablissements medicaux en Chine meridionale. Methodes Onze des 14 municipalites de la province de Guangdong ont participe a cette etude. Les donnees relatives a la capacite a effectuer le depistage de la syphilis, a la couverture du depistage et aux types de tests syphilitiques utilises ont ete recueillies aupres de toutes les sortes d'etablissements medicaux proposant des soins prenataux (n=109). Un total de 494 680 femmes ayant accouche entre 2004 et 2008 ont fait l'objet de l'etude. Resultats En 2008, 54196 femmes enceintes (43,1%) n'ont pas subi le depistage de la syphilis. Parmi ces retomes, 32 863 d'entre elles (60,6%) se sont rendues dans des cliniques ne disposant d'aucune capacite pour effectuer le depistage de la syphilis et 21 333 d'entre elles (39,4%) n'ont pas subi de depistage, bien qu'elles soient allees dans des cliniques aptes a le realiser. La probabilite du manque de capacite de depistage de la syphilis etait beaucoup plus elevee pour les centres de sante (rapport des cotes, RC: 10; intervalle de confiance de 95%, IC: 4-25), les services au niveau communal (RC: 33; IC de 95%: ]0-100) et les services realisant moins de 1000 accouchements par ah (RC: 1,002; IC de 95%: 1,001-1,003). Ces memes caracteristiq ues de service etaient en correlation avec des taux de couverture de depistage inferieurs (P Conclusion Le depistage de la syphilis n'est disponible que dans tres peu d'etablissements medicaux de base qui proposent des soins prenataux, dans lesquels la plupart des nouveau-nes de Chine meridionale voient lejour. A la lumiere de ces informations et de l'incidence croissante de la syphilis dans cette region, I'extension du depistage rapide de la syphilis aux points sanitaires est une priorite. [TEXT NOT REPRODUCIBLE IN ASCII] Objetivo Examinar la capacidad para realizar pruebas de sifilis, evaluar las tasas de cobertura y los tipos de pruebas de sifilis utilizados en centros medicos del sur de China. Metodos Participaron once de los catorce municipios de la provincia de Guangdong. Se recopilaron datos sobre la capacidacl de realizar pruebas de sifilis, la cobertura de evaluacion y los tipos de pruebas de sifilis de todos los tipos de centros medicos publicos que ofrecen cuidados prenatales (n=109). Se estudio a un total de 494 680 mujeres que dieron a luz durante el periodo 2004-2008. Resultados En el ano 2008, 54]96 mujeres embarazadas (el 43,1%) no fueron evaluadas para la sifilis. De estas mujeres, 32863 (el 60,6%) acudieron a clinicas sin capacidad para realizar pruebas de sifilis y 21 333 (e139,4%) acudieron a clinicas que realizaban la prueba, aunque esta no se les realizo. La probabilidad de no disponer de capacidad para realizar la prueba de sifilis era muy superior en puestos de salud (cociente de probabilidades, CP: 10; interva lo de confianza dei 95% IC: 4-25), servicios municipales (CP: 33; IC dei 95%: 10-100) y servicios con [less than or equal to] 1000 partos ai aho (CP: 1.002; IC dei 95%: 1.001-1.003). Estas mismas caracteristicas de servicio correlacionadas con tasas de cobertura de evaluacion inferiores (P Conclusion La evaluacion de la sifilis esta disponible en muy pocas de las instalaciones medicas basicas que ofrecen cuidados prenatales y donde se da a luz a la mayor parte de los neonatos del sur de China. A causa de esto y del aumento de la incidencia de la sifilis en la zona, la ampliacion de los puntos de asistencia para la realizacion de pruebas rapidas de sifilis es una prioridad., Introduction The last decade has seen a pronounced resurgence of syphilis in China, (1-3) especially in south-eastern coastal provinces, which carry the greatest disease burden. (4,5) One such province is [...]

Abstract Background Syphilis has made a dramatic resurgence in China during the past two decades and become the third most prevalent notifiable infectious disease in China. Female sex workers (FSWs) have become one of key populations for the epidemic. In order to investigate syphilis infection among different tiers of FSWs, a cross-sectional study was conducted in 8 sites in China. Methods Serum specimens (n = 7,118) were collected to test for syphilis and questionnaire interviews were conducted to obtain socio-demographic and behavioral information among FSWs recruited from different types of venues. FSWs were categorized into three tiers (high-, middle- and low-tier FSWs) based on the venues where they solicited clients. Serum specimens were screened with enzyme-linked immunosorbent assay (ELISA) for treponemal antibody followed by confirmation with non-treponemal toluidine red unheated serum test (TRUST) for positive ELISA specimens to determine syphilis infection. A logistic regression model was used to determine factors associated with syphilis infection. Results Overall syphilis prevalence was 5.0% (95%CI, 4.5-5.5%). Low-tier FSWs had the highest prevalence (9.7%; 95%CI, 8.3-11.1%), followed by middle-tier (4.3%; 95%CI, 3.6-5.0%, P < 0.001) and high-tier FSWs (2.2%; 95%CI, 1.6-2.9%, P < 0.001). Factors independently associated with syphilis infection included older age, lower education level, geographic location, lower tier of typology, and injection drug use. Conclusions This multi-site survey showed a high prevalence of syphilis infection among FSWs and substantial disparities in syphilis prevalence by the tier of FSWs. The difference in syphilis prevalence is substantial between different tiers of FSWs, with the highest rate among low-tier FSWs. Thus, current surveillance and intervention activities, which have low coverage in low-tier FSWs in China, should be further examined.

Abstract Background Syphilis cases have risen in many parts of China, with developed regions reporting the greatest share of cases. Since syphilis increases in these areas are likely driven by both increased screening and changes in sexual behaviours, distinguishing between these two factors is important. Examining municipal-level primary syphilis cases with spatial analysis allows a more direct understanding of changing sexual behaviours at a more policy-relevant level. Methods In this study we examined all reported primary syphilis cases from Guangdong Province, a southern province in China, since the disease was first incorporated into the mandatory reporting system in 1995. Spatial autocorrelation statistics were used to correlate municipal-level clustering of reported primary syphilis cases and gross domestic product (GDP). Results A total of 52,036 primary syphilis cases were reported over the period 1995-2008, and the primary syphilis cases increased from 0.88 per 100,000 population in 1995 to 7.61 per 100,000 in 2008. The Pearl River Delta region has a disproportionate share (44.7%) of syphilis cases compared to other regions. Syphilis cases were spatially clustered (p = 0.01) and Moran's I analysis found that syphilis cases were clustered in municipalities with higher GDP (p = 0.004). Conclusions Primary syphilis cases continue to increase in Guangdong Province, especially in the Pearl River Delta region. Considering the economic impact of syphilis and its tendency to spatially cluster, expanded syphilis testing in specific municipalities and further investigating the costs and benefits of syphilis screening are critical next steps.

Abstract Background The last decade has seen enormous advances in HIV treatment and care, but how to implement scaled up HIV testing, prevention, and treatment in low-income areas still presents a formidable public health challenge. South China faces expanding syphilis and sexually transmitted HIV epidemics, but health systems characteristics important for scaling up syphilis and HIV testing have not been defined. Methods A purposive sample to ensure public, private, and public-private hybrid STI clinic inclusion was selected in a South China city. Eight key informant interviews were conducted with the STI clinic manager, followed by eight focus group discussions with physicians. Data collection relied on a semi-structured format that included questions in each of the following domains: 1) clinical facilities; 2) laboratory capacity with a focus on syphilis/HIV diagnosis; 3) clinic personnel; 4) physical space with a focus on locations to disclose confidential results; 5) financial support. Results Public STI clinics had free syphilis testing/treatment and laboratory facilities to perform essential syphilis and HIV tests. However, despite serving a large number of STI patients, private STI clinics lacked nontreponemal syphilis testing, HIV testing, and had fewer connections to the public health infrastructure. Formally trained assistant physicians were 2.5 times as common as physicians at STI clinics. Only one of the 8 sites had onsite voluntary counseling and testing (VCT) services available. Conclusion These STI case studies reveal the potential for expanding integrated syphilis/HIV services at public STI clinics in China. More health services research is needed to guide scale-up of syphilis/HIV testing in China.

Objective: To estimate the potential effects of an intense sex work crackdown on syphilis transmission in Guangdong Province, China.Methods: We developed a deterministic compartmental model of syphilis transmission among female sex workers (FSW) and their male clients in Guangdong Province, China. We based model assumptions on census data and scientific literature, and we fitted the model to sentinel surveillance estimates of syphilis prevalence (positive results in both treponemal and non-treponemal tests) among FSW between 2009 and 2013. We estimated the impact of an intense sex work crackdown in 2014 by comparing the number of new syphilis infections between 2014 and 2020 in crackdown versus basecase (no crackdown) scenarios. In modelling scenarios, we examined main crackdown mechanisms of impact, including changed number of FSW engaging in sex work, reduction of weekly transactions, condom usage rate and syphilis diagnosis rate.Results: In the basecase, predicted syphilis prevalence in FSW decreased from 2% in 2014 to 0.4% in 2020. In crackdown scenarios, syphilis incidence was predicted to transiently decrease and then to rebound relative to basecase levels a few years later. Shorter crackdowns led to higher, faster rebounds.Conclusions: Short-term intense crackdowns may exacerbate syphilis transmission among FSW and further marginalise an already vulnerable group. This study provides a quantitative, infection-related basis for changing sex work policies to reduce harms. [ABSTRACT FROM AUTHOR]

Background: Syphilis is a major public health problem in many regions of China, with increases in congenital syphilis (CS) cases causing concern. The Chinese Ministry of Health recently announced a comprehensive 10-y national syphilis control plan focusing on averting CS. The decision analytic model presented here quantifies the impact of the planned strategies to determine whether they are likely to meet the goals laid out in the control plan. Methods and Findings: Our model incorporated data on age-stratified fertility, female adult syphilis cases, and empirical syphilis transmission rates to estimate the number of CS cases associated with prenatal syphilis infection on a yearly basis. Guangdong Province was the focus of this analysis because of the availability of high-quality demographic and public health data. Each model outcome was simulated 1,000 times to incorporate uncertainty in model inputs. The model was validated using data from a CS intervention program among 477,656 women in China. Sensitivity analyses were performed to identify which variables are likely to be most influential in achieving Chinese and international policy goals. Increasing prenatal screening coverage was the single most effective strategy for reducing CS cases. An incremental increase in prenatal screening from the base case of 57% coverage to 95% coverage was associated with 106 (95% CI: 101, 111) CS cases averted per 100,000 live births (58% decrease). The policy strategies laid out in the national plan led to an outcome that fell short of the target, while a four-pronged comprehensive syphilis control strategy consisting of increased prenatal screening coverage, increased treatment completion, earlier prenatal screening, and improved syphilis test characteristics was associated with 157 (95% CI: 154, 160) CS cases averted per 100,000 live births (85% decrease). Conclusions: The Chinese national plan provides a strong foundation for syphilis control, but more comprehensive measures that include earlier and more extensive screening are necessary for reaching policy goals. Please see later in the article for the Editors' Summary., Introduction Congenital syphilis (CS) has reemerged in China as a common, preventable cause of stillbirth, neonatal death, low birth weight, and irreversible congenital malformations [1-4]. In response to the resurgent [...]

Oil extraction from onion was performed by steam distillation. Response surface methodology was applied to evaluate the effects of ratio of water to raw material, extraction time, zymolysis temperature and distillation times on yield of onion oil. The maximum extraction yield (1.779%) was obtained as following conditions: ratio of water to raw material was 1, extraction time was 2.5 h, zymolysis temperature was 36° and distillation time was 2.6 h. The experimental values agreed well with those predicted by regression model. The chemical composition of extracted onion oil under the optimum conditions was analysed by gas chromatography-mass spectrometry technology. The results showed that sulphur compounds, like alkanes, sulphide, alkenes, ester and alcohol, were the major components of onion oil. [ABSTRACT FROM PUBLISHER]