[Imported and non-imported diseases in the immigrant population. A decade of experience from an infectious diseases unit]

Seroprevalence and epidemiology of hepatitis B and C viruses in pregnant women in Spain. Risk factors for vertical transmission

Background & aim

Worldwide, measures are being implemented to eradicate hepatitis B (HBV) and C (HCV) viruses, which can be transmitted from the mother during childbirth. This study aims to determine the prevalence of HBV and HCV in pregnant women in Spain, focusing on country of origin, epidemiological factors and risk of vertical transmission (VT).

Methodology

Multicentre open-cohort study performed during 2015. HBV prevalence was determined in 21870 pregnant women and HCV prevalence in 7659 pregnant women. Epidemiological and risk factors for VT were analysed in positive women and differences between HBV and HCV cases were studied.

Results

HBV prevalence was 0.42% (91/21870) and HCV prevalence was 0.26% (20/7659). Of the women with HBV, 65.7% (44/67) were migrants. The HBV transmission route to the mother was unknown in 40.3% of cases (27/67) and VT in 31.3% (21/67). Among risk factors for VT, 67.7% (42/62) of the women had viraemia and 14.5% (9/62) tested HBeAg-positive. All of the neonates born to HBV-positive mothers received immunoprophylaxis, and none contracted infection by VT. In 80% (16/20) of the women with HCV, the transmission route was parenteral, and nine were intravenous drug users. Viraemia was present in 40% (8/20) of the women and 10% (2/20) were HIV-coinfected. No children were infected. Women with HCV were less likely than women with HBV to breastfeed their child (65% vs. 86%).

Conclusions

The prevalences obtained in our study of pregnant women are lower than those previously documented for the general population. Among the women with HBV, the majority were migrants and had a maternal family history of infection, while among those with HCV, the most common factor was intravenous drug use. Despite the risk factors observed for VT, none of the children were infected. Proper immunoprophylaxis is essential to prevent VT in children born to HBV-positive women.

Epidemiology and surveillance of human (neuro)cysticercosis in Europe: is enhanced surveillance required?

OBJECTIVES

To report on relevant national surveillance systems of (N)CC and taeniasis (the infection with the adult tapeworm) in the European Union/European Economic Area and to assess the magnitude of (N)CC occurrence by retrieving information on cases for the period 2000-2016.

METHODS

(N)CC cases were retrieved via national reporting systems, a systematic literature search, contact with clinicians and a search for relevant 'International Statistical Classification of Diseases and Related Health Problems' (ICD)-based data.

RESULTS

Mandatory notification systems for (N)CC were found in Hungary, Iceland and Poland. Ten cases were reported in Poland and none in Hungary and Iceland. Through the systematic literature review and information given by clinicians, 263 individual and 721 aggregated (N)CC cases from 19 European countries were identified. ICD-based data were obtained from five countries. From 2000 to 2016, a total of 3489 cases (N)CC cases were coded: 832 in Italy, eight in Latvia, 357 in Portugal, 2116 in Spain and 176 in Sweden.

CONCLUSION

Despite being classified as a possible eradicable disease, (N)CC is still diagnosed across Europe, yet its true extent and impact remain unclear.

Hepatitis C prevalence among the migrant population in Spain: A systematic review and meta-analysis

INTRODUCTION

Spain, which has one of the largest migrant populations in Europe, has committed to eliminating the hepatitis C virus (HCV). The aim of this study was to estimate the prevalence of HCV among migrant groups in Spain, a country of 46 million people, with an estimated HCV-antibody prevalence of 1.7%.

METHODS

Studies on HCV and migration in Spain were identified by systematically searching three databases from the first records to 30 November 2017, and consulting experts at the Ministry of Health and in the 17 Spanish autonomous communities. A meta-analysis was conducted to determine pooled HCV prevalence for the general migrant population. Prevalences were also calculated for high-risk migrant populations and populations who had undergone hospital screening, stratified by region of origin.

RESULTS

Out of 243 studies identified, 26 met the eligibility criteria. The meta-analysis of the general migrant population found HCV antibody prevalence to be 1.6%. Migrants originating from European countries, including those at high or moderate risk for HCV, had the highest pooled prevalence (7.1%). In the general migrant population, prevalence was highest among sub-Saharan African migrants (3.1%) and lowest among Latin American migrants (0.2%).

CONCLUSION

Based on the limited available data, the prevalence among the general migrant population was found to be the same as the general Spanish population. Further research is needed to more accurately determine HCV prevalence for the overall migrant population and specific migrant subpopulations with a higher risk in the country as a whole and in each of Spain's 17 autonomous communities.

[Infectious diseases in the adult population admitted to a general hospital]

INTRODUCTION

To determine the infectious diseases (ID) that led to hospital admission of the foreign population>14 years.

MATERIAL AND METHODS

A retrospective study of foreign patients admitted to hospital (2000-2012).

RESULTS

A total of 3,087 foreigners were admitted with infectious diseases. Of these, 73.6% were from low income countries, and 26.4% from high income countries. Most of them (86.9%) were admitted with common ID, 11.8% with transmissible ID, and 1.6% with tropical ID. Tropical ID and transmissible ID were higher in patients from low income countries (14.7%) than from high income countries (9.7%, p<0.001). The main tropical ID was malaria (74%). The main transmissible ID were tuberculosis (40.3%), hepatitis (27.8%), and HIV/AIDS (27.5%).

CONCLUSION

Common ID were the main reason for admission in foreign population.

[Parasitosis (I). Imported heart and lung lesions]

Imported parasitoses are an uncommon condition in our setting, although recently, the increase of migratory flow has been leading to an increase in the detected cases of these diseases. This fundamentally occurs in immigrants from tropical zones where these conditions are generally endemic. However, imported parasitoses are being increasingly diagnosed in Western persons who have lived in the tropics for different reasons. When examining a subject with cardiovascular syndromes with a possible parasitic origin, it could be useful to classify the possible geographic zone of origin in order to perform disease screening. Then, if the problem is mainly respiratory, it would be well to first rule out the existence of tuberculosis in the case of long stays and to individual the diagnosis according to the geographic area, season of the year, type of exposure and symptoms presented, in the case of shorter stays.

Results from screening immigrants of low-income countries: data from a public primary health care

BACKGROUND

A total of 3,132 immigrants from low- and middle-income countries were involved in a cross-sectional observational study to screen for infectious diseases among immigrants attending public primary health care (PHC) centers. The study was conducted to clarify the degree of demographic differences and risk predictors of these diseases.

METHODS

Demographic and clinical variables, screening for infectious diseases [hepatitis B and C, human immunodeficiency virus infection, syphilis, and tuberculosis (TB)], and analytical data (anemia, hematuria, and liver function) were recorded from immigrants attending a public PHC unit in Barcelona.

RESULTS

Global hepatitis B, including chronic and previous, reached 18.1%; Morocco as the country of origin [odds ratio (OR) 2.1, 95% confidence interval (CI) 1.07-4.14] and gastrointestinal symptoms (OR 1.9, CI 1.18-3.02) were risk factors. Hepatitis C prevalence was 3.3% with elevated hepatic transaminase levels as a risk factor (OR 26.1, CI 8.68-78.37). Positive syphilis was 3.1%; latent and active TB rates were 28.1 and 5.8%, respectively. Concerning TB, we found remarkable differences both among WHO regions of origin (the Eastern Mediterranean region showed the highest rate of active TB, 8%) and the three categories of years of residence in Spain (6.5% for <1 year, 12.8% for 1-5 years, and 10% for >5 years).

CONCLUSIONS

The data allowed recommendation of a minimal screening of TB in immigrants from low-income countries regardless of the years of residence in Spain, hepatitis C in patients with altered transaminase levels, and hepatitis B in patients with gastrointestinal symptoms and/or from Morocco.

[Imported infectious diseases in tertiary hospital]

INTRODUCTION

An Imported Diseases Clinic was created in the hospital in 2009. The aim of this study was to asses its contribution in terms of capacity, quality of care and teaching offered.

PATIENTS AND METHODS

A retrospective study was conducted from 2009 to 2011, analyzing: A) development of knowledge by means of protocols and publications created, and subject taught; B) capacity and quality of care offered by the analysis of patients seen, the adequacy of the protocols and accessibility. The patients were classified into 3 groups. Group 1: immigrant patient screening, group 2: patient consultation after tropical or sub-tropical travel, group 3: screening of vertical transmission of imported disease.

RESULTS

Six protocols have been developed and disseminated on the unit website, as well as 5 scientific publications. A total of 316 patients were evaluated: 191 included in group 1 (29 Adopted and 162 Immigrants), 57 in group 2 (94.7% Visiting Friends and Relatives and 81.5% without a pre-travel consultation). They consulted due to, gastrointestinal symptoms (52.6%) and fever (43.8%), with 68 included in group 3 at risk of imported disease by vertical transmission (62 Trypanosoma cruzi, 1 Human T Lymphotropic Virus and 5 Plasmodium spp.). The overall adherence to the protocols was about 77.1%.

DISCUSSION

Infectious Diseases Units must adapt to the reality of the population and be flexible in its structure. Periodic assessment of the quality of care offered is essential, as well as an evaluation on the need for additional studies.

Neurocysticercosis in Western Europe: a re-emerging disease?

The objective of the study was to estimate the magnitude of neurocysticercosis in Western Europe and to determine the pattern of disease expression in the region. Review of patients with neurocysticercosis diagnosed in Western Europe from 1970 to 2011. Abstracted data included: demographic profile, clinical manifestations, form of neurocysticercosis, and whether the disease occurred in immigrants, European international travelers, or Europeans who had never been abroad. A total of 779 patients were found. Of these, only 28 were diagnosed before 1985. Countries with more reported patients were Portugal (n = 384), Spain (n = 228), France (n = 80), The United Kingdom (n = 26), and Italy (n = 21). Information on citizenship status, clinical manifestations, and forms of the disease was available in only 30-40% of patients. Immigrants accounted for 53% of cases, European travelers for 8%, and non-traveler Europeans for 39%. Immigrants/European travelers were most often diagnosed during the new Millennium, presented most often with seizures, and had less frequently inactive (calcified) neurocysticercosis than non-traveler Europeans. The prevalence of neurocysticercosis in Western Europe may be on the rise. The pattern of disease expression is different among immigrants/European travelers than among non-traveler Europeans. It is possible that some patients had acquired the disease as the result of contact with Taenia solium carriers coming from endemic countries. Much remains to be learned on the prevalence of neurocysticercosis in this region.