Monitoring of trichinosis in the southern subjects of the Far Eastern Federal District

Бондаренко, Г. А.; Solovyova, Irina; Трухина, Т И; Иванов, Д. А.

doi:10.37102/0869-7698_2022_222_02_9

Cited by 2 publications

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“…Нематоды рода трихинелла (TrichinellaRailliet, 1895) вызывает зоонозную болезнь трихинеллез. 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].…”

Section: введение / Introductionunclassified

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

Бондаренко¹,

Solovyova²,

Трухина³

2023

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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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Morphological features of capsules of trichinella larvae in the muscle tissue of badgers of the Amur region

Bondarenko,

Solovyеva,

Trukhina

2024

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One of the main reservoirs of the causative agent of trichinosis in the Amur region is the badger, whose meat and fat are used for medicinal purposes or as a delicacy. Data on infection of badgers and the localization of Trichinella larvae in the muscle tissue of badgers are ambiguous. The morphological features of the development of muscle tissue in badgers are associated with lifestyle, which is likely reflected in the localization of Trichinella larvae in certain muscles. The goal is to determine the morphological parameters of capsules of Trichinella larvae in the muscle tissue of badgers in the conditions of the Amur region. The material was the muscle tissue of the skeletal muscles of the head, pectoral, pelvic limbs, muscles of the spinal column and abdominal cavity of badgers, hunted by hunters under licenses in the Amur region.Detection of Trichinella larvae was carried out by compressor trichinoscopy and digestion in individual housing, according to MUK 4.2.2747-10 “Methods of sanitary and parasitological examination of meat and meat products.” For each muscle, the intensity of invasion was determined (personal/gram). Morphological parameters of capsules of Trichinella larvae were determined using an eyepiece micrometer. The capsule shape index was calculated using the formula V=D/L.The most invaded muscles in badgers have been identified and the shape index of capsules of Trichinella larvae has been determined. Areas of natural foci of trichinosis in the Amur region have been identified. In badgers, the most infested Trichinella larvae are the head muscles (mylohyoid muscle, tongue muscle tissue and masticatory muscle), which are preferable to take for diagnosing trichinosis in this animal species.The rounded shape of the capsules of Trichinella larvae (shape index 0.72), characteristic of badgers of the weasel family, was established. The areas of natural foci of trichinosis have been identified - Mikhailovsky, Seryshevsky, Blagoveshchensky, Tambov and Ivanovo administrative districts of the Amur Region. Of particular concern is infection in the southern, most populated areas, where there is a high probability of the transition of trichinosis from natural foci to anthropurgic and synanthropic ones.

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Monitoring of trichinosis in the southern subjects of the Far Eastern Federal District

Cited by 2 publications

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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

Morphological features of capsules of trichinella larvae in the muscle tissue of badgers of the Amur region

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