Kozlov V.A., Voronov L.N., Sapozhnikov S.P., Smirnova N.V., Agafoshkina L.Yu., Efeykina N.B., Dyachkova I.M.
Prevalence of Ascariasis in the Chuvash Republic
The analysis of ascariasis prevalence in the Chuvash Republic for the period 1997-2017 was carried out depending on natural and anthropogenic environmental factors. As a result of multiple regression analysis including 61 factors integrated into the matrix for regression analysis, 19 factors were selected which were statistically significantly associated with the incidence of ascariasis depending on the administrative-territorial structure of the Republic. The chosen factors are divided into six groups: group 1 – factors reflecting the characteristics of water balance and the distribution of water masses in the area: (a) average annual flow (coefficient = 0.761), determining the amount of water flowing along river beds per year; b) the number of drilled wells (coefficient = 0.5133); c) the average snow cover height (coefficient = 0.2940); d) 4) the average amount of precipitation for the winter period (coefficient = 0.0073); e) the average number of sources whoch do not conform to sanitary standards and regulations (coefficient = -0.3309); f) drainage network density in km per km2 (coefficient = –0.0152), i.e. water balance and distribution of water masses in the territory of the region determine the direct impact on the incidence of ascariasis; group 2 – factors created by agricultural human activities related to soil: (a) the average annual number of poultry per 100 hectares of crops (coefficient = 0.2265); b) the specific weight of agricultural livestock areas in the entire area of agricultural land,% (coefficient = 0.2537); c) sheep stock per 100 hectares of agricultural land (coefficient = 0.1838), as it is known, livestock objects maintain viable helminth eggs for a long time; group 3 – ecological-climatic factors: a) fluctuations within the limits of baseline radiation background (coefficient = -0.2537); b) average year-round temperature (coefficient = –0,1103); c) depth of soil freezing (coefficient = –0.0412) – this group of factors is a deterrent in the spread of ascariasis because it directly affects to slow down the maturation of eggs and contributes to the early loss of vitality. As a result of cartography, a high incidence of ascariasis is noted in areas with prevalence of typical gray forest soils in combination with light gray and dark gray forest soils, in areas with gray cespitose- cryptopodzol soils. It is Krasnochetaisky region – 171,17±108,36 cases per 100 thousand population, Alikovsky region – 118,5±74.4 and Shumerlinsky region – 70,5±47,8. The minimum morbidity is in Yalchiksky region – 12,10±9,14. Conclusions: 1) the incidence of ascariasis in the territory of the Chuvash Republic is of a mosaic character. The incidence of ascariasis prevails in administrative-territorial regions located in the western part of the Chuvash Republic; 2) it is statistically proved that such a hydro-geological feature of the territory as annual runoff, including spring flooding, has a significant negative impact on morbidity; 3) such environmental and climatic factors as annual average temperature and the depth of soil freezing, have a deterrent effect on the incidence of ascariasis.
- Drinev S.E., ed.; Il’ina T.A., Vasilev O.A., Ershov M.A., Balyasnyi V.I., Popova N.N., DimitrievV. Atlas zemel’ sel’skokhozyaistvennogo naznacheniya Chuvashskoi respubliki: atlas-monografiya [Atlas of agricultural lands of the Chuvash Republic: Atlas-monograph]. Cheboksary, 2007, 184 p.
- Bairamova G.R. Bioekologicheskie aspekty epidemiologii, epizootologii, profilaktiki kishechnykh invazii cheloveka i zhivotnykh v Respublike Bashkortostan: avtoref. … diss. d-ra biol. nauk [Bioecological aspects of epidemiology, epizootology, prevention of intestinal infestations of humans and animals in the Republic of Bashkortostan. Abstract of Doct. Diss.]. Tyumen, 2010, 38 p.
- Gosudarstvennyi lesnoi reestr [State forest register]. Available at: http://minpriroda.cap.ru/action/activity/gosudarstvennij-lesnoj-reestr/gosles-reestr.
- Guzeeva T.M. Sostoyanie diagnostiki parazitarnykh zabolevanii v Rossiiskoi Fedeatsii [State of diagnostics of parasitic diseases in the Russian Federation]. Meditsinskaya parazitologiya, 2011, no. 4, pp. 44–45.
- Ivanko O.M., Kozhokaru A.A., Kolos L.A., Filipenko L.I., Melnik A.V. Osobennosti epidemiologo-geograficheskogo raionirovaniya gel’mintozov na territorii Ukrainy [Features of epidemiologist-geographical zoning of helminthiasis on the territory of Ukraine]. Meditsinskii alfavit, 2012, no. 4, pp. 19–23.
- Kozlovskii A.A. Gelmintozy u detei Gomelskoi oblasti [Helminthosis in children of the Gomel region]. Mezhdunarodnye obzory: klinicheskaya praktika i zdorov’e, 2016, no. 1, pp. 68–83.
- Rechnoi stok i ego kharakteristiki [River flow and its characteristics]. Available at: http://industrial-wood.ru/transport-lesa/6199-rechnoy-stok-i-ego-harakteristiki.html.
- Romanenko N.A., Padchenko I.K., Chebyshev N.V. Sanitarnaya parazitologiya [Sanitary Parasitology]. Moscow, Meditsina Publ., 2000, 320 p.
- Soldatova M.V. Ekologo–sotsialnye osnovy profilaktiki askaridoza na Yuge Evropeiskoi chasti Rossii (na primere Stavropolskogo kraya): avtoref. … dis. kand. biol. nauk [Ecological and social bases of ascariasis prevention in the South of the European part of Russia (on the example of the Stavropol territory). Abstract of Cand. Diss.]. Moscow, 2006, 26 p.
- Supryaga V.G., Turbabina N.A., Morozova L.F., Sergiev V.P., Kondrashin A.V., Stepanova E.V., Maksimova M.S., Rakova V.M., Morozov E.N. Sovremennaya epide-miologicheskaya situatsiya po askaridozu v rossiiskoi federatsii [Modern epidemiological situation of ascariasis in the Russian Federation]. Meditsinskaya parazitologiya i parazitarnye bolezni, 2018, no. 1, pp. 8–12.
- Tokareva M.K. Ekologicheskie osobennosti vozbuditelya askaridoza v usloviyakh vozdeistviya tekhnogennykh i anomal’nykh prirodnykh faktorov (na primere Kurskoi oblasti): avtoref. … dis. kand. biol. nauk [Environmental features of the ascariasis pathogen under the influence of technogenic and abnormal natural factors (on the example of the Kursk region). Abstract of Cand. Diss.]. Moscow, 2007, 24 p.
- Shevchenko G.N. Osobennosti rasprostraneniya geogel’mintozov v Rovenskoi oblasti [The features of propagation of geohelminthoses in Rivne region]. Meditsinskaya parazitologiya, 2004, no. 3, pp. 51–52.
- Becker S.L., Liwanag H.J., Snyder J.S., Akogun O., Belizario. V.Jr, Freeman MC, Gyorkos T.W., Imtiaz R., Keiser J., Krolewiecki A., Levecke B., Mwandawiro C., Pullan R.L., Addiss D.G., Utzinger J. Toward the 2020 goal of soil-transmitted helminthiasis control and elimination. PLoS Negl. Trop. Dis., 2018, vol. 12, no. 8, e0006606. DOI: https://doi.org/10.1371/journal.pntd.0006606.
- Lai Y.S. Bayesian geostatistical modelling of soil–transmitted helminth survey data in the People’s Republic of China. Vectors., 2013, vol. 6, p. 359.
- Kozlov Vadim A.
- Doctor of Biological Sciences, Candidate of Medical Sciences, Professor of the Department of Medical Biology with a course in Microbiology and Virology, Chuvash State University, Russia, Cheboksary (email@example.com; ORCID: https://orcid.org/0000-0001-7488-1240)
- Voronov Leonid N.
- Doctor of Biological Sciences, Professor, Department of Medical Biology with a Course in Microbiology and Virology, Chuvash State University, Russia, Cheboksary (firstname.lastname@example.org; )
- Sapozhnikov Sergey P.
- Doctor of Medical Sciences, Head of the Department of Medical Biology with a course in Microbiology and Virology, Chuvash State University, Russia, Cheboksary (email@example.com; ORCID: https://orcid.org/0000-0003-0967-7192)
- Smirnova Nadezhda V.
- Candidate of Biological Sciences, Associate Professor, Department of Medical Biology with course of Microbiology and Virology, Chuvash State University, Russia, Cheboksary (firstname.lastname@example.org; )
- Agafoshkina Liliya Y.
- Senior Lecturer, Department of Medical Biology with a course in Microbiology and Virology, Chuvash State University, Russia, Cheboksary (email@example.com; )
- Efeikina Nadezhda B.
- Candidate of Biological Sciences, Associate Professor, Department of Medical Biology with course of Microbiology and Virology, Chuvash State University, Russia, Cheboksary (firstname.lastname@example.org; )
- Dyachkova Iraida M.
- Candidate of Biological Sciences, Associate Professor of the Department of Medical Biology with a Course in Microbiology and Virology, Chuvash State University, Russia, Cheboksary (email@example.com; )
Kozlov V.A., Voronov L.N., Sapozhnikov S.P., Smirnova N.V., Agafoshkina L.Yu., Efeykina N.B., Dyachkova I.M. Prevalence of Ascariasis in the Chuvash Republic [Electronic resource] // Acta medica Eurasica. – 2020. – №3. P. 37-45. – URL: http://acta-medica-eurasica.ru/en/single/2020/3/5/. DOI: 10.47026/2413-4864-2020-3-37-45.