RU2595481C2 - Device for diagnosis of trichinosis - Google Patents

Abstract

FIELD: veterinary science.

SUBSTANCE: invention relates to veterinary-sanitary examination and can be used for analysis of meat raw material for trichinosis under conditions of slaughter areas, special laboratories or hunting enterprises. Device for trichinelloscopy in field conditions includes light unit 1, connected to it by means of thread compressor unit 2 with hole 3 for introduction of polypropylene plate 6 with sections of samples, optical unit 4 and monocular 5 arranged in optical unit by means of threaded connection.

EFFECT: device is portable and non-traumatic and provides objective diagnosis of trichinosis in field conditions.

1 cl, 1 dwg, 1 ex

Description

The invention relates to devices for veterinary and sanitary examination, in particular to devices developed on the optical-mechanical principle (compressor trichinoscopy) of the study of raw meat, and can be used for examination of carcasses, meat products of animal origin for trichinosis in the conditions of slaughter centers, specialized laboratories, hunting farms, as well as in the field.

Prevention of helminthiases transmitted through meat and meat products is approved by the Veterinary Department of the Ministry of Agriculture of Russia on September 23, 1996, 13-7-37 (included in SanPIN 3.2.569-96 “Prevention of parasitic diseases in the Russian Federation, approved by the State Sanitary and Epidemiological Surveillance of Russia on 10.31.1996 city, 43).

In a comprehensive assessment of the diagnosis of trichinosis of animals, compressor trichinoscopy is given a fundamental place. This diagnostic method involves microscopy of sections of muscle tissue located in the compressor, viewing is performed using various devices: microscopes, projection cameras, etc. (Veterinary legislation, vol. 4 - M .: Agropromizdat, 1983, 252-259).

Their known application, especially in the field, is difficult due to size, stationarity of their work, weight, transportation, reliability due to the use of a glass compressorium, insufficient support for resolution.

In this regard, there was a need to develop a device that allows for the effective diagnosis of trichinosis in the field.

The closest in technical essence, used for examination for trichinosis, is the device described in the patent of the Russian Federation No. 2201591. This device consists of a base on which a carrier panel with a monocular is mounted movably through the axis of rotation. The panel by means of an emphasis is fixed in the working position, on the inner surface of the panel there is a guide frame for the glass compressorium.

The disadvantage of this device is its small portability, significant dimensions and weight of the device, as well as the presence of a glass compressorium. If it is damaged in the field, the operation of this device is completely ruled out.

The aim of the present invention is to provide a reliable small-sized device for the diagnosis of trichinosis in the field.

To achieve this goal, the known device, consisting of a transport unit, a base, a rotation axis, a panel, a guide frame stop, a light source, a monocular, a glass compressorium, which is an integral part of the device for the diagnosis of trichinosis, is distinguished by the presence of an independent compressor unit and a polypropylene safety plate providing its constant integrity and the possibility of reusable use.

Polypropylene film (BOPP, biaxially oriented polypropylene film) is the most popular material for high-quality flexible packaging, designed for further printing on it. BOPP-film is distinguished by barrier, physical, mechanical and optical properties, as well as high heat resistance, strength and flexibility. Biaxially oriented or biaxially oriented polypropylene films (biaxially oriented polypropylene films) are film materials based on synthetic polymers of the polyolefin group.

The device provides high diagnostic efficiency of research for trichinosis in various types of lighting, is an individual, small-sized, simple device, and a polypropylene plate ensures reliability in field conditions. As a result of its plasticity, it is traumatic, not subject to mechanical stress, has a small size and weight, is transportable in the field. The proposed device provides a high level of diagnosis (within 85-100%), in comparison with the prototype has smaller dimensions (5 times), weight and dimensions. A simple arrangement of the main elements of the device, unlike the prototype, unifies its preparation for work, makes it accessible to a wide range of users.

Example.

A device for the diagnosis of trichinosis in the field consists of three blocks: 1 - light, 2 - compressor, 3 - optical, 4 - plates for the studied objects.

The main elements (unit) of the device are connected in a threaded way, the body is metal, it creates resistance to mechanical stress in the field.

The device is compact 220 mm in length and 30 mm in diameter.

Light unit 1 consists of an LED, a 3-volt CR 2032 battery and a button for opening an electric circuit.

The compressor unit 2 at its base has a frosted glass with a thickness of 5 mm, which is the basis for pressing the polypropylene plate with the test object. In the compressor unit there is a technological hole 3 with a size of 11 × 2 mm for the introduction and advancement of the plate with sample portions.

Blocks 1, 2 are interconnected using conventional threads. Between blocks 1 and 2 there is a rubber sealing ring that prevents moisture from entering block 1, thereby protecting all elements from oxidation.

The optical unit 4 at the base has transparent glass 5 mm thick, which is the pressing part to the compressor unit. When screwing the optical block 4 into block 2, crushing of the studied objects occurs. A monocular is mounted in the optical unit using a threaded connection.

Plate 6 with a length of 140 mm and a width of 10 mm is a double folded, thin, dense, transparent polypropylene strip, divided into 12 cells, 10 of which are 10 × 10 mm in size, and two cells for fixing the fingers of the researcher.

The operation of the device is as follows. For research, from each muscle sample a piece of 2 × 5 mm is cut strictly along the muscle fibers, placed in the cells of the lower part of the plate 6 and pressed against its upper part. Then the plate 6 is inserted into a special hole 3, which is located in the compressor unit 2.

In the light unit 1, a button turns on the light source. Then, by screw movement of blocks 2 and 4, the object is crushed according to the principle of the compressorium and through the eyepiece 5 the object is observed in transmitted light. The diopter adjustment to the intermediate image in order to compensate for the myopia or farsightedness of the eye of the researcher is adjusted by the monocular.

The change in the field of the investigated object is made by moving the plate 6 in the technological hole.

Claims (1)

A device for trichinoscopy in the field, including a light unit 1, a compressor unit 2 connected to it through a thread 3 with an opening 3 for introducing a polypropylene plate 6 with sample portions, an optical unit 4 and a monocular 5 mounted in the optical unit using a threaded connection.

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