Cross-sectional serological surveys of 13,006 small ruminants were conducted in 2003 to establish baseline levels of seropositivity to brucellosis and of 12,102 again in 2009 to evaluate the efficacy of controls based on biannual conjunctival vaccination with Rev 1. Seroprevalence dropped by 80 per cent in five years in eight pilot programme districts where vaccination was generally well implemented, and the prevalence of households with evidence of infection in their animals dropped from 25.1 to 7.5 per cent. Seroprevalence was reduced by 40 per cent in 10 districts where vaccination was intermittent with low coverage during some seasons. There were no changes in 19 districts where no vaccinations were carried out. Sheep vaccinated one or more times were found to be 2.5 times more likely to be serotest positive than were non-vaccinated sheep, whereas vaccinated goats were 6.4 times more likely to be serotest positive than non-vaccinated goats.
Aim. Study epizootological and epidemiological features of brucellosis on the territory of the Republic of Tajikistan under the conditions of social-economic transformation with evaluation of width and scale of its spread, as well as reasons of the present situation. Materials and methods. Official statistics data, results of expert evaluations, reports, analytical material of national and international organizations, results of clinical and epidemiological analysis were used. Descriptive-evaluative epidemiologic methods, serologic studies of samples obtained from humans, animals, environmental objects between 2000 and 2013; mapping using GIS-technology, as well as statistical analysis were used. Techniques of calculation of DALY index and population infection risk parameter were used. Results. Features of situation by brucellosis were detected, that lay in its wide spread among humans and agricultural animals, changes in morbidity structure, as well as character of its seasonal and territorial spread, connected with predominant effect of social risk factors. Conclusion. Contemporary situation for brucellosis in the Republic of Tajikistan is characterized by a pronounced non-welfare and determined by acting social-economic conditions. The main factors are changes in the conditions of conducting agricultural activity against the background of high level of unemployment and external work migration.
The aim of this work was to study modern manifestations of seasonal brucellosis among the population of the Republic of Tajikistan. The materials and methods: of the study were the official statistics, as well as the results of previously performed studies on the risk assessment of the incidence in population. A retrospective epidemiological analysis of annual incidence rate for the period from 1997 to 2016 was conducted, depending on the most significant social and environmental risk factors. Results. The article shows the impact on the annual incidence rate of socio-economic transformations, including the privatization of collective livestock farms, accompanied by the massive movement of farm animals to private ownership, the loss of practice in animal breeding, and changes in environmental and climatic conditions. Against the background of the intensification of sheep breeding, there is a tendency in seasonality smoothing and shifting the maximum levels of population incidence of brucellosis to the spring season. Conclusion. The modern features of seasonal manifestation of brucellosis infection in the Republic of Tajikistan make it necessary to apply a differentiated approach to planning and conducting preventive measures in various areas of the country.
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