A proposal for changes to the European Union syphilis surveillance case definition using evidence from evaluations in Ireland

Syphilis remains a disease of public health importance, with considerable health effects if not treated. Concurrent infection with syphilis and untreated HIV facilitates HIV transmission. The incidence of syphilis in Europe has been increasing, particularly among men who have sex with men (MSM) and in MSM with HIV. However, there is heterogeneity among countries in the case definition used for syphilis and in reported syphilis notification rates. In Ireland, we have undertaken a number of refinements of the national syphilis surveillance system since 2014, including refinement of the laboratory thresholds for notification (rapid plasma reagin 1:16 and/or positive IgM). This article outlines the steps taken and some of the challenges we faced. Our current case definition now accurately reflects the epidemiology of syphilis in Ireland and our current surveillance provides timely information for action, while not reducing the sensitivity of the system too much. For countries where surveillance is driven mainly by laboratory reporting and where obtaining clinical details is challenging, these thresholds for notification may be a pragmatic solution.

Syphilis Resurgence in Belgrade, Serbia, in the New Millennium: An Outbreak in 2014

OBJECTIVE

A worldwide syphilis incidence increase was recorded at the beginning of the new millennium, occurring primarily among men who have sex with men (MSM). The aim of this study was to analyse the epidemiological situation of syphilis in the Belgrade population between 2005 and 2014 and to examine the characteristics of an early syphilis outbreak among MSM in Belgrade in 2014.

METHOD

Reporting of syphilis is compulsory in Serbia. Routinely reported data were analysed along with data collected from patients' charts.

RESULTS

During the period observed, syphilis incidence increased from 1.07 per 100,000 in 2005 to 4.1 per 100,000 in 2014 (383.2%). From 2005 to 2009, syphilis rates in Belgrade were low, around 1 case per 100,000 people. The first outbreak was registered in 2010. The new incidence increase happened in 2012, and again in 2014 when it was the highest. These incidence changes were registered mainly in men, where the frequency of syphilis was much higher than in women. In 2014, primary syphilis was diagnosed in 20 cases, secondary syphilis in 42, and early latent syphilis in 9 patients. Fifty-seven were MSM, 10 were heterosexual men and 4 were women. Twenty-four cases, all MSM were co-infected with HIV. Majority of patients acquired infection in Belgrade, while in 42/71 cases oral sex was the only risk factor. In comparison with HIV negative, HIV positive syphilis patients were older, more frequently unemployed and MSM. They also more frequently had sex with unknown partners and were diagnosed in the secondary stage of infection.

CONCLUSIONS

Study results underline the need for coordinated and expeditious surveillance, partner services, enhanced screening of population at risk, health education, as well as early diagnosis and treatment.

Prevalence of HIV and syphilis co-infection and associated factors among non-commercial men who have sex with men attending a sexually transmitted disease clinic in Shenzhen, China

BACKGROUND

Although HIV and syphilis co-infection has been frequently observed in men who have sex with men (MSM), only few studies have focused on it. Different subgroups of MSM might exhibit heterogeneous HIV and syphilis risk profiles, indicating that interventions for HIV and HIV-related co-infections may vary with different subgroups of MSM. However, no previous study has investigated HIV and syphilis co-infection among non-commercial MSM (ncMSM) attending a sexually transmitted disease (STD) clinic. Therefore, this study aimed to explore the prevalence of HIV and syphilis co-infection and associated factors among ncMSM attending an STD clinic in Shenzhen, China.

METHODS

NcMSM attending the STD clinic of Shenzhen Center for Chronic Disease Control were recruited in this cross-sectional study every Monday between March 2013 and August 2015 using a site based convenience sampling method. An anonymous questionnaire was used to collect data regarding socio-demographic characteristics, risky sexual behaviors and HIV-related knowledge. Blood samples were collected to perform HIV and syphilis tests.

RESULTS

Totally 533 participants were enrolled in this study and the prevalence of HIV and syphilis co-infection among them was 13.13%. Multivariable analyses indicated that having lived in Shenzhen for less than one year (aOR = 2.80, 95% CI = 1.30-6.05), having first anal sexual intercourse before the age of 18 (aOR = 2.78, 95% CI = 1.29-5.89), having 3 to 5 anal sexual partners in the past six months (aOR = 2.54, 95% CI = 1.19-5.40), playing exclusively receptive (aOR = 6.87, 95% CI = 3.02-15.61) or both insertive and receptive (aOR = 3.65, 95% CI = 1.64-8.09) roles in anal sexual intercourse and not always using condom in anal sexual intercourse (aOR = 2.13, 95% CI = 1.08-4.19) were associated risk factors for HIV and syphilis co-infection, relative to the non-infected ncMSM. Compared with the mono-infected ncMSM, associated risk factors for the co-infection were being unmarried (aOR = 2.47, 95% CI = 1.03-5.89) and playing exclusively receptive role (aOR = 2.44, 95% CI = 1.04-5.73) in anal sexual intercourse.

CONCLUSIONS

HIV and syphilis co-infection is quite prevalent among the study participants in Shenzhen. Integrated and intensified intervention strategies, specifically targeting at the non-infected and mono-infected ncMSM attending the STD clinic, are needed to reduce HIV and syphilis co-infection. Most importantly, non-infected and mono-infected ncMSM attending the STD clinic with the aforementioned associated risk factors should be given special concern.

Crimean-Congo Hemorrhagic Fever in Dubai, United Arab Emirates, 2010: Case Report

INTRODUCTION

Crimean-Congo hemorrhagic fever (CCHF) is a severe infectious disease that is not endemic in the United Arab Emirates (UAE).

CASE PRESENTATION

We report two cases of confirmed CCHF diagnosed in Dubai, UAE, during Hajj season 2010. Both patients presented with an acute history of high-grade fever, skin rash, and hematemesis.

CONCLUSIONS

In spite of maximal supportive measures and intravenous ribavirin therapy, both patients died within a few days from start of illness. More than 250 health care workers came into variable degrees of contact with the index cases, and none of them developed signs or symptoms suggestive of acquiring the illness. Health care workers from nonendemic regions should be aware of zoonotic hemorrhagic fevers imported via infected cattle and ticks and be able to diagnose and properly manage suspected cases in a timely manner. In addition, proper infection-control measures should be undertaken to prevent nosocomial spread of infection.

Sexually transmitted infection incidence among adolescents in Ireland

OBJECTIVE

The burden of sexually transmitted infections (STIs) rests with young people, yet in Ireland there has been very little research into this population. The purpose of this study was to determine the incidence rate and establish risk factors that predict STI occurrence among adolescents in Ireland.

DESIGN

Routine diagnostic, demographic and behavioural data from first-time visits to three screening centres in the southwest of Ireland were obtained. Univariate and multivariable logistic regression models were used to assess risk factors that predict STI occurrence among adolescents.

RESULTS

A total of 2784 first-time patients, aged 13-19 years, received 3475 diagnoses between January 1999 and September 2009; 1168 (42%) of adolescents had notifiable STIs. The incidence rate of STIs is 225/100 000 person-years. Univariate analysis identified eligible risk factors (p<0.2) for inclusion in the multivariable model. Multivariable logistic regression showed the dominant risk factors for STI diagnosis to be: males who sometimes [odds ratio (OR) 2.02] or never (OR 1.83) use condoms; and females 18-19 years (OR 2.26) and 16-18 years (OR 1.8), with 2 (OR 1.33) or 3+ (OR 1.56) partners in the last 12 months, who are non-intravenous drug users (OR 0.72), are most likely to receive a positive STI diagnosis.

CONCLUSIONS

STI diagnosis has become increasingly common in Ireland. The proportion of notifications among those aged under 20 years is increasing. These data illustrate the significance of age, condom use and number of sexual partners as risk factors for STI diagnosis. Furthermore, providing data for the first time, we report on the high incidence rate of STIs among adolescents in Ireland. The high levels of risk-taking behaviour and STI acquisition are highlighted and suggest that there is a need for an integrated public health approach to combat this phenomenon in the adolescent population.

Syphilis resurgence in Dublin, Ireland

A large outbreak of syphilis was reported in Dublin, Ireland, in 2001. The mean age of patients in 2001 was 35 years and 22.5% of patients were HIV-positive. The number of new cases decreased from 2003 on, however, new diagnoses have again increased. All positive syphilis serology results from 2007-09 were identified. Patients were included if they had a newly positive syphilis serology or, in the case of patients with previously treated syphilis, had a four-fold rise in rapid plasma reagin titre. Four hundred and thirty-nine new diagnoses of syphilis were made. The mean age of patients at diagnosis was 35.7 years (range 17-73 years). Four hundred and twelve (93.8%) cases occurred in men. Three hundred and eighty-one (86.8%) cases occurred in men who have sex with men (MSM). The estimated crude incidence rate among MSM is 378.16 per 100,000 population. Where known, 126/421 (28.7%) occurred in HIV-positive patients. Sixty-eight (15.5%) episodes of syphilis infection were diagnosed in patients who had had previously been diagnosed and treated for syphilis; 43/68 (63.2%) cases of re-infection occurred in HIV-positive patients. The rising number of syphilis diagnoses and high associated HIV co-infection rate is concerning and prevention efforts must continue to decrease the number of new syphilis cases.

Syphilis among STD clinic patients in Prague in 2009

The aim of the study was to evaluate clinical, epidemiological and demographic data of patients with syphilis hospitalized at the Department of Dermatovenereology of the General Teaching Hospital in 2009 and to identify the groups at high risk of sexually transmitted diseases. The results were compared with the previous surveys carried out between 1999 and 2005 and also with the data of the National Registry of Venereal Diseases for 2008. A total of 232 patients were hospitalized in 2009 (including 26 women admitted for compulsory retreatment in pregnancy). We noticed a 25% increase in the number of patients in comparison with the year 2008. Of the total number of patients, 206 were patients with newly diagnosed syphilis, of which 153 (74.3%) were men and 53 (25.7%) women. There was 22.3% of patients with primary and 31.6% with secondary syphilis. As in the previous years, heterosexual contact remained the most frequent route of syphilis transmission. However, the number of homosexual and bisexual men increased, amounting to 64.7% of all hospitalized men. Four men were HIV positive. The age distribution did not change; majority of the patients were aged between 30 and 40. The proportion of foreigners also remained unchanged (19.9%); they came mainly from the Slovak Republic (31.1%) and Ukraine (26.7%). The absolute number of reported syphilis cases has been increasing in the Czech Republic since 2006. From the epidemiologic point of view, the increasing incidence of early stages of the disease is alarming. Men prevail over women among the infected persons; the men having sex with men (MSM) has been increasing in the last three years.

Increased sexually transmitted infection incidence in a low risk population: identifying the risk factors

BACKGROUND

Between 1994 and 2006, the incidence of sexually transmitted infections (STIs) in Ireland has increased by over 300%. Recent literature would suggest that this figure is an underestimation of the true scale of infection. Our objective was to determine the risk factors associated with STI diagnosis in a population with a rapidly increasing STI incidence.

METHODS

Using diagnostic, demographic and behavioural information from three STI clinics (January 1999 to December 2006), multivariable logistic regression models were used to identify risk factors associated with STI diagnosis.

RESULTS

Age, smoking and inconsistent condom use are the dominant risk factors. Males aged 20-24 years and females aged <20 years being at greatest risk of STI acquisition. Having three or more partners was not associated with an elevated risk of STI diagnosis. At univariate level, homosexuals and bisexuals have a decreased risk of STI acquisition compared with heterosexuals. Rate of consistent condom use was low < or =13.3%.

CONCLUSIONS

Age, condom use and number of sexual partners are important risk factors for STI diagnosis. Contrary to international STI literature, having multiple sexual partners does not increase STI incidence. Age specific behavioural interventions that target increased condom use may be effective in reducing STIs in Ireland. At policy level, a reduction in the taxation on condoms from 13.5 to 5% is needed to lower the prohibitive cost and increase their use.

[SPECT and FDG-PET in diagnostics of neurolues]

Syphilis is a recurrent treponematosis of acute and chronic evolution. In general it is either sexually or congenitally transmitted. Primary syphilis appears as a single and painless lesion. Secondary syphilis may manifest years later, the secondary bacteremic stage is accompanied by generalized mucocutaneous lesions. Tertiary disease can be disseminated to bones and virtually any organ, involving principally the ascending aorta and the central nervous system. Nuclear medicine provides diagnostic methods in case of skeletal manifestations by bone scan - identifying periostitis and osteomyelitis. Hepatic gummas can be imaged by 99m-Tc-colloid liver scintigraphy. In neurosyphilis brain perfusion SPECT enables imaging of cerebral involvement by small vessel endarteritis resulting from syphilitic vascular disease. 18-FDG PET is also useful to evaluate neurosyphilis, a reduction of brain glucose consumption is observed. The technique adequately enables imaging of therapeutic response and might be superior to morphologic imaging. We present our experiences with these nuclear medicine methods in patients with neurolues. The incidence of neurolues is estimated at 2 per 100.000 inhabitants worldwide, migration processes might bring a re-emergence of this disease to Austria and other developed countries of the EU. Scintigraphic methods should be kept in mind for diagnostic evaluation of neurosyphilis.

The denominator problem: estimating MSM-specific incidence of sexually transmitted infections and prevalence of HIV using population sizes of MSM derived from Internet surveys

BACKGROUND

Measuring prevalence and incidence of sexually transmitted infections in hard to reach populations like men who have sex with men (MSM) is hampered by unknown size and regional distribution of this population. Community sample- and study-based measurements are often fraught with participation biases and do not allow generalization of the results for other regions or the whole population group of MSM.

METHODS

We used the proportional regional distribution of participants of large internet-based surveys among MSM from Germany together with a general population survey-derived estimate of the MSM population to estimate regional population sizes. Based on transmission group category from surveillance data and regional MSM population size we calculated regional population-specific incidence rates of newly diagnosed HIV infection and syphilis. For HIV prevalence we compared estimates of prevalent HIV infections in MSM from a surveillance data-based model with a mixed model in which we used the proportional regional distribution of HIV positive participants from surveys and the estimated total number of prevalent HIV infections from the surveillance based model.

RESULTS

Assuming a similar regional distribution of survey participants and the MSM population as a whole, the regional proportion of MSM in the general population can be estimated. Regional incidence calculated with the estimated MSM population as denominator and national surveillance data as numerator results in regional peak incidence rates of 7-8 per 1,000 MSM for newly diagnosed HIV infection and syphilis. The gradient between metropolitan and rural areas narrows considerably compared with calculations which use the total (male) population as denominator. Regional HIV prevalence estimates are comparable in the two models.

CONCLUSION

Considering the difficulties to obtain regionally representative data by other sampling methods for MSM, in Western post-industrialized countries internet-based surveys may provide an easy and low cost tool to estimate regional population distributions. With national surveillance data, which categorize transmission groups, regional population-specific incidence rates for reportable sexually transmitted infections can be estimated. HIV prevalence estimates for regional MSM populations show differences related to the level of urbanization, MSM concentration, and starting points of the HIV epidemic in western and eastern Germany.

Syphilis, psychiatry and offending behaviour: clinical cases from nineteenth-century Ireland

BACKGROUND

Syphilis presented substantial challenges to nineteenth-century medical and psychiatric services.

AIMS

To illustrate the clinical course and diagnostic challenges associated with neurosyphilis in nineteenth-century Ireland.

METHOD

This paper uses original archival material from the Central Criminal Lunatic Asylum, Dublin to present clinical cases and inform a discussion of related issues.

RESULTS

Mr A, a 34-year-old banker convicted of "felonious entry", demonstrated many psychiatric and neurological features of neurosyphilis ("general paralysis of the insane"); he soon became "feeble", "paralytic" and "demented", and died within 2 years. The case of Mr B, a 38-year-old game-keeper convicted of "attempting to upset trains", illustrates diagnostic dilemmas associated with neurosyphilis, especially when complicated by evidence of tuberculosis ("scrofulous diathesis").

CONCLUSIONS

The clinical and diagnostic challenges presented by syphilis have changed over the past century, but these cases, combined with recent evidence of syphilis outbreaks, highlight ongoing needs for clinical and epidemiological vigilance.

Infectious syphilis in high-income settings in the 21st century

In high-income countries after World War II, the widespread availability of effective antimicrobial therapy, combined with expanded screening, diagnosis, and treatment programmes, resulted in a substantial decline in the incidence of syphilis. However, by the turn of the 21st century, outbreaks of syphilis began to occur in different subpopulations, especially in communities of men who have sex with men. The reasons for these outbreaks include changing sexual and social norms, interactions with increasingly prevalent HIV infection, substance abuse, global travel and migration, and underinvestment in public-health services. Recently, it has been suggested that these outbreaks could be the result of an interaction of the pathogen with natural immunity, and that syphilis epidemics should be expected to intrinsically cycle. We discuss this hypothesis by examining long-term data sets of syphilis. Today, syphilis in western Europe and the USA is characterised by low-level endemicity with concentration among population subgroups with high rates of partner change, poor access to health services, social marginalisation, or low socioeconomic status.

Increasing rates of sexually transmitted diseases in homosexual men in Western europe and the United States: why?

The recent increases in acute STDs among MSM must be viewed in the context of a post-AIDS era that is characterized by demographic shifts,changing sexual attitudes, and rapidly changing social contexts. A key driver seems to be the growing prevalent pool of HIV-positive MSM for whom the crucial motivator for safer sex (primary HIV prevention) no longer exists and where, given the prevalence of seroconcordant sexual mixing, consider-able uncertainty and conflicting advice regarding the rationale and benefits for continued safer-sex practice are unclear [105,106]. Although it is tempting to ascribe these changes to increases in risk behavior, it is essential that the contexts in which the changes are occurring are also considered. It may also be appropriate to contemplate whether further changes to the social environment (eg, structural interventions) are a suitable adjunct to our traditional prevention activities that operate largely in isolation from each other. It seems natural to advocate that interventions that adopt holistic approaches to the sexual health of MSM and that address upstream factors such as mental health, drug use, discrimination, and internalized homophobia should be included in the efforts to create more healthy environments for MSM. However, there is still some way to go in identifying which of these upstream interventions are effective, how they may be implemented within or alongside existing health care systems, and what impact, if any, they are likely to have on STD transmission. Such interventions are also likely to belong on implementation time, require consider political will, and be extremely hard to evaluate, and the benefits may not be seen within the same generation in which they are implemented. Therefore, there must be confidence that this is the appropriate route of travel. The consistency of findings from across industrialized countries confirms an increasing connectivity within the global MSM community;a community that is decreasingly defined by geographic boundaries and, in the era of the Internet and easier foreign travel, increasingly linked by shared interests and social and sexual networks. This is powerfully demonstrated in the near-simultaneous syphilis and LGV outbreaks among MSM in Europe and the United States [29]. In this regard, greater collaboration between researchers and providers working with MSM indifferent countries is now required. More specifically, consideration should be given to creating closer partnerships between sentinel cities, such as London, New York, San Francisco, Berlin, Paris, and Amsterdam, that have large MSM populations and are likely to be emerging, or rapid diffusion sites for new social and sexual trends that may impact on disease transmission. There are many benefits to such cross-national working,including earlier recognition and improved response to emerging threats,sharing innovative practice, avoiding duplication of effort, and creating a united front for dealing with what must be considered a cause for concern domestically and globally.

[Sexually transmitted infections. Current clinical and therapeutic data]

A recent increase of syphilis and gonorrhea has been observed in France. More recently, the resurgence of very infrequent STDs, such as lymphogranuloma venerum, has been noticed in Western Europe. This data illustrates the emergence of high-risk behavior and the relative failure of prevention for sexually transmitted infection and HIV infection, especially in homosexual men. Since the onset of the AIDS epidemic, oral sex has been increasingly used both by heterosexual and homosexual partners. Even if the risk of HIV transmission with oral sex is very low, oral sex is a major mode of transmission for syphilis, gonorrhea, and genital herpes. Condoms are seldom used for oral sex. The transmission of STI by oral sex is less documented in heterosexual than in homosexual patients. The level of knowledge does not seem to reduce risky behavior in the most concerned population. An infection not normally considered as sexually transmitted (i.e. hepatitis C) may be transmitted by high risk sexual behavior increasing the risk of blood-blood contact, as recently reported among HIV-infected homosexual men. The emergence of high-risk sexual practices (traumatic practices, fisting) in a specific population required focused prevention measures to avoid blood-transmitted infections. The increased risk of HIV transmission by ST co-infection (syphilis, genital herpes, gonorrhea) and the potential morbidity of STI in HIV infected patients should also be emphasized.