Plutonium, 137Cs and 90Sr in selected invertebrates from some areas around Chernobyl nuclear power plant.

Results are presented for (137)Cs, (90)Sr and plutonium activity concentrations in more than 20 samples of terrestrial invertebrates, including species of beetles, ants, spiders and millipedes, collected in the highly contaminated area of the Chernobyl exclusion zone. The majority of samples were collected in Belarus, with some also collected in the Ukraine. Three other samples were collected in an area of lower contamination. Results show that seven samples exceed an activity concentration of 100 kBq/kg (ash weight--a.w.) for (137)Cs. The maximum activity concentration for this isotope was 1.52+/-0.08 MBq/kg (a.w.) determined in ants (Formica cynerea). Seven results for (90)Sr exceeded 100 kBq/kg (a.w.), mostly for millipedes. Relatively high plutonium activity concentrations were found in some ants and earth-boring dung beetles. Analyses of activity ratios showed differences in transfer of radionuclides between species. To reveal the correlation structure of the multivariate data set, the Partial Least-Squares method (PLS) was used. Results of the PLS model suggest that high radiocesium activity concentrations in animal bodies can be expected mainly for relatively small creatures living on the litter surface. In contrast, high strontium activity concentrations can be expected for creatures which conduct their lives within litter, having mixed trophic habits and a moderate lifespan. No clear conclusions could be made for plutonium.

Effects of sex work on the prevalence of syphilis among injection drug users in 3 Russian cities.

OBJECTIVES: We examined risk factors for syphilis infection among injection drug users in 3 Russian Federation cities, focusing particular attention on the potential roles of gender and sex work. METHODS: We conducted a cross-sectional survey of injection drug users in Moscow, Volgograd, and Barnaul, collecting behavioral data and testing for antibodies to Treponema pallidum. Associations between presence of antibodies to T pallidum and covariates were explored. RESULTS: Overall, the prevalence of antibodies to T pallidum was 11% (95% confidence interval=9.7%, 13.1%). Syphilis was associated with involvement in sex work and with gender in Moscow and Barnaul but not in Volgograd. Female injection drug users not involved in sex work were more likely than men to be younger and to have recently begun to inject; female injection drug users involved in sex work were more likely than those not involved in sex work to inject daily. CONCLUSIONS: Syphilis transmission dynamics varied by region. Sex work can increase syphilis risk among injection drug users, potentially feeding the momentum of sexually transmitted HIV and syphilis among noninjectors. Targeted interventions are needed to reduce both sexual and injection risk behaviors among injection drug users.

Barriers to accessing drug treatment in Russia: a qualitative study among injecting drug users in two cities.

OBJECTIVES: To assess factors influencing access to drug treatment among injecting drug users (IDUs) in two Russian cities. METHODS: Eighty-six qualitative interviews were conducted with IDUs in Volgograd and Barnaul in 2003. IDUs were recruited through local drug treatment services, needle exchanges, and drug user networks. RESULTS: Three main barriers to treatment assess were identified: financial constraints, fear to registration as a drug user, and perceived low efficacy of available treatment services. Registration of drug users was associated with loss of employment, breaches in confidentiality. and stigma. Some participants did not think that drug treatment services could respond appropriately and effectively to their treatment needs. CONCLUSIONS: These findings highlight the importance of environmental factors in mediating IDUs access to drug treatment, which might suggest the need for social and structural interventions. Access to drug treatment services should be enhanced by reducing the financial burdens of drug treatment and minimizing the stigma associated with drug user registration. Russia should shift from a highly medicalised model of treatment toward a more holistic approach that recognises the diversity of treatment needs among IDUs. These priorities are especially timely given the urgent need to integrate drug treatment as part of wider HIV prevention responses in Russia.