Differences in prevalence of hepatitis B virus infection and genotypes between ethnic populations in Suriname, South America.

Epidemiological data on hepatitis B virus (HBV) are needed to benchmark HBV elimination goals. We recently assessed prevalence of HBV infection and determinants in participants attending the Emergency Department in Paramaribo, Suriname, South America. Overall, 24.5% (95%CI = 22.7-26.4%) of participants had anti-Hepatitis B core antibodies, which was associated with older age (per year, adjusted Odds Ratio [aOR] = 1.03, 95%CI = 1.02-1.04), Afro-Surinamese (aOR = 1.84, 95%CI = 1.52-2.19) and Javanese ethnicity (aOR = 1.63, 95%CI = 1.28-2.07, compared to the grand mean). 3.2% of participants were Hepatitis B surface Ag-positive, which was also associated with older age (per year, aOR = 1.02, 95%CI = 1.00-1.04), Javanese (aOR = 4.3, 95%CI = 2.66-6.95) and Afro-Surinamese ethnicity (aOR = 2.36, 95%CI = 1.51-3.71). Sex, nosocomial or culturally-related HBV transmission risk-factors were not associated with infection. Phylogenetic analysis revealed strong ethnic clustering: Indonesian subgenotype HBV/B3 among Javanese and African subgenotypes HBV/A1, HBV/QS-A3 and HBV/E among Afro-Surinamese. Testing for HBV during adulthood should be considered for individuals living in Suriname, specifically with Javanese and Afro-Surinamese ancestry.

Prevalence of and factors associated with adult-onset asthma in different ethnic groups: The HELIUS study.

Little is known about adult-onset asthma in different ethnic groups. The aim of this study was to examine ethnic differences in the prevalence of adult-onset asthma and factors associated with this phenotype. Cross-sectional data of 23,356 participants of the HELIUS study were used, including Dutch, South-Asian Surinamese, African Surinamese, Moroccan, Turkish and Ghanaian origin participants. Adult-onset asthma was defined as: self-reported asthma symptoms or start of asthma-medication at age ≥18 years combined with a smoking history <10 pack years. The prevalence of adult-onset asthma and its association with potential risk factors were assessed by logistic regression analyses. The adjusted prevalence of adult-onset asthma was higher in the Turkish, Moroccan and South-Asian Surinamese groups (4.9-6.0%) compared to the Dutch, Ghanaian and African Surinamese origin groups (2.4-2.6%). In addition to ethnicity, age, female sex, BMI, and doctors' diagnosis of nasal allergy/hay fever and chronic sinusitis/polyps were independently associated with adult-onset asthma. There are significant differences in the adjusted prevalence of adult-onset asthma among six ethnic groups.

Migrants travelling to their country of origin: a bridge population for HIV transmission?

BACKGROUND: By having unprotected heterosexual contact in both The Netherlands and their homeland, migrants who travel to their homeland might form a bridge population for HIV and sexually transmitted infection (STI) transmission. We studied the determinants for such a population in two large migrant communities in The Netherlands. METHODS: From 2003 to 2005, 1938 people of Surinamese and Antillean origin were recruited at social venues in two large cities, interviewed and their saliva samples tested for HIV antibodies. We used multivariate multinomial logistic regression to explore characteristics of groups with four risk levels (no, low, moderate and high) for cross-border transmission. RESULTS: 1159/1938 (60%) participants had travelled from The Netherlands to their homeland in the previous 5 years and 1092 (94%) of them reported partnerships and condom use in both countries. Of these 9.2% reported having unprotected sex with partners in both countries. People in this high-risk or bridge population group were more likely to be male, frequent travellers and older compared with people who had no sex or had sexual contact solely in one country in the past 5 years. CONCLUSIONS: Older male travellers of Surinamese and Antillean origin are at high risk for cross-border heterosexual transmission of HIV/STIs. They should be targeted by prevention programmes, which are focused on sexual health education and HIV/STI testing, to raise their risk awareness and prevent transmission.

Sexual risk behaviour among Surinamese and Antillean migrants travelling to their countries of origin.

OBJECTIVES: To examine travel related sexual risk behaviour among migrants living in Amsterdam. METHODS: People originating from Surinam (n = 798) and the Netherlands Antilles (n = 227) were recruited in order to study the heterosexual spread of HIV within ethnic groups. Log binomial regression was used to study determinants for homeland travel over the past 5 years; logistic regression was used to study determinants of unprotected sex on these visits. RESULTS: Of the migrants, 38% of men and 42% of women visited their homeland. Visits were most likely among men who had lived > or =7 years in the Netherlands, were employed, had a high educational level and were/had been married. For women, visiting was associated with older age and living in the Netherlands for > or =8 years. Of migrants visiting their homeland, 47% of men and 11% of women acquired a local sexual partner. For male travellers, Surinamese origin (adjusted OR 10.66; 95% CI 1.72 to 104.48) and a history of > or =1 sexually transmitted infection (STI) (adjusted OR 12.51; 95% CI 3.75 to 46.95) were associated with having unprotected sex with local partners. For women, having >1 partner in the past 5 years (OR 13.57; 95% CI 2.57 to 250.28) was associated with unprotected sex with local partners. CONCLUSION: Migrants are at substantial risk for HIV and STIs while visiting their homeland. It is important to reach migrants, who are likely to engage in unprotected sex during visits, for pretravel health education. Additional research on risk behaviour in the homeland and the Netherlands is needed to identify migrants with high risk behaviour.

[Quality of life in children with sickle cell disease in Amsterdam area]. / Kwaliteit van leven bij kinderen met sikkelcelziekte in de regio Amsterdam.

OBJECTIVE: To determine the differences in quality of life between children with sickle cell disease and healthy immigrant children. DESIGN: Descriptive, comparative. METHOD: The quality of life of children with sickle cell disease between 5 and 15 years old being treated in the Emma Children's Hospital AMC in Amsterdam, the Netherlands, was assessed by using a questionnaire for parents (TNO-AZL Children's Quality of Life Questionnaire (TACQOL) parent form) if the child was between 5 and 11 years old and a questionnaire for children (TACQOL child form) if the child was between 8 and 15 years old. The study period was April-October 1998. The questionnaires were completed by 45 (parents of) patients. The results were compared with a healthy reference group of immigrant children. Statistical analysis was performed using the Student t-Test. RESULTS: Children with sickle cell disease as well as their parents scored significantly lower on the items general physical, motor and independent daily functioning and on occurrence of negative emotions. No significance was observed for the items cognitive functioning and school performance nor for social functioning or occurrence of positive emotions. CONCLUSION: In children, sickle cell disease leads to compromised physical and possibly also psychological wellbeing, as well as the experience of decreased independence in daily functioning, but not to compromised cognitive or social aspects of the quality of life.

Quality of life in children with sickle cell disease in Amsterdam area

OBJECTIVE: To determine the differences in quality of life between children with sickle cell disease and healthy immigrant children. DESIGN: Descriptive, comparative. METHOD: The quality of life of children with sickle cell disease between 5 and 15 years old being treated in the Emma Children's Hospital AMC in Amsterdam, the Netherlands, was assessed by using a questionnaire for parents (TNO-AZL Children's Quality of Life Questionnaire (TACQOL) parent form) if the child was between 8 and 15 years old. The study period was April-October 1998. The questionnaires were completed by 45 (parents of) patients. The results were compared with a healthy reference group of immigrant children. Statistical analysis was performed using the Student t-Test. RESULTS: Children with sickle cell disease as well as their parents scored signifcantly lower on the items general physical, motor and independent daily functioning and on occurrence of negative emotions. No significance was observed for the items cognitive functioning and school performance nor for social functioning or occurrence of positive emotions. CONCLUSIONS: In children, sickle cell disease leads to compromised physical and possibly also psychological wellbeing, as well as the experience of decreased independence in daily functioning, but not to compromised cognitive or social aspects of the quality of life. (AU)

Characterization of a Tospovirus Isolate of Iris Yellow Spot Virus Associated with a Disease in Onion Fields in Brazil.

A tospovirus from onion causing a disease known as "sapeca" by growers in Brazil was characterized. Symptoms on onion consisted of numerous eyelike spots on the leaves and flower stalks resulting in flower abortion. Nicotiana benthamiana and N. rustica were the only systemic hosts experimentally found. Double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) experiments demonstrated that this virus was serologically related to iris yellow spot virus (IYSV), a tospovirus recently described in the Netherlands. This virus, from onion, based on an amino acid sequence identity of 90.5% for the N gene protein, is regarded as a strain of IYSV and is designated IYSVBR This 10% divergence in the nucleocapsid protein may represent an adaptation of the virus to distinct ecological niches.

Prevalence of hereditary haemochromatosis in premature atherosclerotic vascular disease.

It has been proposed that iron accumulation may contribute to atherogenesis by increasing free radical formation and oxidative stress. Epidemiological studies in which the association of iron status with atherosclerosis was assessed raised conflicting results. To test whether genetic haemochromatosis is associated with increased atherosclerosis, we determined the prevalence of two mutations in the HFE gene related to haemochromatosis (845G-->A; Cys282Tyr. and 187 C-->G, His63Asp) in 265 consecutive patients with premature (<50 years of age) angiographically-proven atherosclerotic disease (coronary and/or peripheral), and in 272 healthy controls. PCR amplification followed by RsaI (Cys282Tyr analysis) and BclI (His63Asp analysis) restriction digestion was employed to define the genotypes. The mutant Cys282Tyr allele had a frequency of 0.07 among controls and 0.04 among patients (carrier frequency of 14.0% and 8.3%, respectively). The frequency of the His63Asp mutant allele was 0.14 (28.6% of carriers) in controls and 0.11 (22.2% of carriers) in patients. Five of 265 patients (1.1%) and 9/272 controls (3.3%) were compound heterozygotes. In conclusion, a lower prevalence of the Cys 282Tyr mutation and a similar frequency of the His63Asp mutation was observed in patients with atherosclerotic disease in comparison with normal controls. These findings do not support an association between haemochromatosis and atherogenesis.