Cystic Echinococcosis in the Far Eastern Federal District: Current State of the Problem

Драгомерецкая, А. Г.; Троценко, О. Е.; Бебенина, Л. А.; Курганова, О. П.; Игнатьева, М. Е.; Зайцева, Т. А.; Копылов, П. В.; Maslov, D. V.; Жданова, Н. И.; Rubtsova, Anna; Фунтусова, О. А.; Феделеш, И. Ю.

doi:10.36233/0372-9311-2018-6-80-85

Cited by 2 publications

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“…Многие ученые, изучая проблему трихинеллеза на территории Дальнего Востока, установили выраженный природно-очаговый характер трихинеллеза с преимущественной циркуляцией возбудителя у диких животных [1][2][3][4][5][6][7][8][9].В Амурской области циркули-руют 3 вида нематод из рода трихинеллкапсулообразующие T. spiralisиT. nativa и неинкапсулированный вид T. pseudospiralis [10]. При этом основным видом, циркулирующим в Амурской области, являетсякапсулоообразующий вид T. spiralis.…”

Section: введение / Introductionunclassified

Morphological features of capsules of trichinella larvae in wild animals of the amur region

Бондаренко¹,

Solovyova²,

Трухина³

2023

jour

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The problem of trichinosis on the territory of the Far East has a pronounced natural focal character with the predominant circulation of the causative agent of trichinosis in wild animals. The main species circulating in the Amur Region is the capsule- forming species T. spiralis. The ability to form capsules is one of the biological features of Trichinella larvae and a necessary component of the process of their survival. The thickness of the walls of the capsule gradually increases while the larva and intracapsular muscle sarcoplasm with nuclei remain alive. At the same time, the morphological variability of Trichinella capsules under the influence of many ecological and biological factors was noted.The goal is to determine the morphological features of the capsules of Trichinella larvae in wild animals in the Amur region.We conducted studies of the muscle tissues of wild animals by the method of compressor trichinelloscopy and the method of digestion in artificial gastric juice, according to MUK 4.2.2747-10 "Methods of sanitary and parasitological examination of meat and meat products" to determine the presence of Trichinella larvae. To establish the morphological features, the length and width of the capsules, the thickness of the capsule wall from the sides and at the poles, and the thickness of the larva itself were determined using an eyepiece micrometer. The capsule shape index (V) was calculated as the ratio of the diameter to its length (V=D/L). The shape of capsules of Trichinella larvae in different species of wild animals was determined. The relationship between the morphological parameters of the capsule of the larvae of Trichinella has been established. Indicators of the thickness of the wall of the capsule from the sides and the thickness of the wall of the capsule at the poles can be used to determine the age of Trichinella larvae.

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Section: введение / Introductionunclassified

Morphological features of capsules of trichinella larvae in wild animals of the amur region

Бондаренко¹,

Solovyova²,

Трухина³

2023

jour

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Traditional Lifestyle of the Indigenous Population of the Khabarovsk Krai as a Factor Determining the Spread of Helminth Infections

Dragomeretskaya

Бебенина

Троценко

et al. 2022

PH&LE

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Introduction: Supporting health and wellbeing of indigenous small-numbered peoples of the North is one of the priorities of the regional policy in the Khabarovsk Krai. The centuries-long adaptation of the population to local conditions has created a unique system of the traditional use of natural resources and the most efficient forms and types of households. Despite all globalization processes, fishing, hunting and gathering remain essential elements of the lifestyle of northern indigenous peoples. Against the natural background, specific features of their behavior and nutrition create optimal conditions for helminth life cycles and intense transmission of endemic helminth infections. Objective: To assess effects of the traditional lifestyle of the indigenous population of the Khabarovsk Krai as a factor responsible for the spread of larval helminthiasis and endemic trematode infections. Materials and methods: In 2010–2020, questionnaire-based surveys were conducted and feces samples were collected from Nanai people in the villages of Dada, Sikachi-Alyan, Sinda, and Naikhin and from Udege people in the villages of Gvasyugi and Arsenyevo during expeditions. Results: Endemic trematode eggs were detected in stool samples from all the villages. Clonorchis sinensis eggs were detected in the samples from Dada, Sinda, and Sikachi-Alyan, while Nanophyetus salmincola schikhobalowi eggs were found in the dwellers of Arsenyevo and Gvasyugi. Metagonimus spp. eggs were also detected in isolated cases. The results of sero-epidemiological survey indicate a high frequency of contacts with Toxocara roundworms in all areas and with tapeworms of the Echinococcus type in the traditional villages located in forest areas. Conclusion: Original lifestyle and dietary habits of indigenous peoples in the Khabarovsk Krai pose a high risk of trematode infections (clonorchiasis, nanophietiasis, metagonimiasis) and larval helminthiasis (echinococcosis, toxocarosis). In combination with poor awareness of the population of appropriate preventive measures, this risk contributes to high incidence and prevalence rates of helminthiases in all surveyed national villages.

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Cystic Echinococcosis in the Far Eastern Federal District: Current State of the Problem

Cited by 2 publications

References 1 publication

Morphological features of capsules of trichinella larvae in wild animals of the amur region

Morphological features of capsules of trichinella larvae in wild animals of the amur region

Traditional Lifestyle of the Indigenous Population of the Khabarovsk Krai as a Factor Determining the Spread of Helminth Infections

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