The article is devoted to the current problem of differential diagnosis of diseases of viral etiology in farm animals. Viral diseases are currently widespread, occupy a leading role in the infectious pathology of farm animals, causing enormous economic damage. Given the magnitude of animal vaccine prophylaxis, in order to increase the effectiveness of antiepizootic measures, the urgent issue i s the development of methods for the rapid and effective detection and differentiation of field and vaccine strains of the infectious rhinotracheitis virus in cattle. The possibility of using a polymerase chain reaction to identify and differentiate a vacc ine strain from epizootic strains and isolators of the cattle infectious rhinotracheitis virus is considered. In the process of research, a PCR-RFLP analysis method was developed to detect the IRT virus in the test material. The PCRRFLP analysis method was used to identify and differentiate the vaccine strain TK-A form epizootic strains and isolators of the cattle IRT virus. The principle of PCR, based on repeated repetition of DNA cycles, annealing and synthesis, which leads to an increase in the number of specific DNA fragments of the pathogen, allows you to take into account the results of PCR in an agarose gel. Analysis time is about 30 hours. The sensitivity of detecting viral DNA is 1-10 picograms (102 TCD). Due to characteristics such as relative simplicity and reaction rate, high sensitivity, specificity and reproducibility, PCR has recently become widespread in basic and applied research in various fields of biological science, including veterinary virology. The results obtained during the studies show that the use of PCR-RFLP allows to differentiate field and vaccine strains and isolates of the IRT virus with a high degree of reliability. The use of PCR -RFLP analysis increases the efficiency and informativeness of studies in the molecular epizootol ogy of cattle RTI, as it allows not only to identify the DNA of different virus strains regardless of their nature, but also to differentiate between them, including differentiating the strain TK-A used for the production of attenuated vaccines against epizootic strains and isolates of the virus.

In the last decades of the twentieth century, in the national economy of many countries, organochlorine pesticides were most widely used, characterized by stability in the external environment, the ability to cumulate in various tissues of organisms. Lindane (the gamma isomer of hexachlorocyclohexane) is listed as a restricted persistent organic pollutant and is an ecotoxic substance with severe and chronic effects on the human body. The study of the effect of lindane on carbohydrate metabolism at the present stage is still insufficient. This fact led to the study of the effect of γ-HCH on the insulinogenic function of the pancreas in in vivo and in vitro experiments. In experiments in vivo, the animals of the experimental groups were once orally administered γ-HCH at a dose equal to 1/5 DL50. Isolated pancreatic islets, precipitated in vitro and fixed on mica plates, were exposed to γ-HCH in amounts equivalent to 1/5 to 1/4 DL50. Paraffin sections of pancreatic tissue from experimental and control animals were stained with aldehyde fuchsin according to Gomori, and tissue preparations were also examined by a highly specific method for detecting insulin in β-cells using diethylpseudoisocyanin staining, followed by examination of the preparations in the ultraviolet light of a luminescent microscope.The same methods were used to study preparations of isolated pancreatic islet tissue on the 4th day of cultivation. The influence of orally administered γ-HCH on the level of immunoreactive insulin in the blood of experimental animals was also studied. The insulin level was determined by the enzymatic-immunological method. The concentration of IRI was established before the start of the experiment and 4-4.5 hours after acute inoculation. Results and their significance. In the study of stained preparations of the pancreas of experimental animals, numerous islets of ordinary sizes were revealed, the cytoplasm of which was filled with aldehyde-fuccin granularity in quantities indistinguishable from those observed by microscopy of preparations of control animals. The value of the fluorescence coefficient in the histofluorimetric study of the control and experimental preparations did not differ significantly. However, the content of IRI in the blood serum showed a distinct decrease in the first hours after priming. In experiments in vitro, when studying the effect of γ-HCH on cultured tissue, introduced into the nutrient medium on the second day, in the field of view of the microscope, single, small pancreatic islets were revealed. Their number on a constant area of the plates was significantly lower than the value of the same indicator in the study of control preparations. Thus it has been shown that γ-HCH does not affect the histostructure of the endocrine pancreas, but causes a significant decrease in IRI in the blood serum, as well as a change in the histochemical characteristics of cultured β-cells.

The main task of microbiological study of pulmonary patients is to identify the etiology of acute and exacerbation of chronic disease in order to determine therapy and control its effectiveness. Classical methods of microbiological research consist in isolating a pure culture of the causative agent of the disease with its identification by biochemical, antigenic and other characteristics. Such studies are multistage; they impose rather strict requirements on the quality of the source material, the timing and conditions of its transportation, laboratory equipment and the precise execution of the research methodology for at least 3-5 days. Isolation of the culture of a number of pathogens (atypical intracellular microflora, anaerobic bacteria, mycobacterium tuberculosis) requires even more lengthy studies using special media and equipment. This article presents the results of a bacteriological study of pathogenic microflora in diseases of the respiratory system of the population of the Shcherbakty district of Pavlodar region for 2017-2019, including the following sequence: microscopy of native and Gram stained smears; inoculation of biological material on nutrient media for isolation and identification of the pathogen; determination of the sensitivity of the isolated microorganism to antibiotics; immunological (serological) research methods aimed at determining antigens of microbiological origin, as well as antibodies to them in the patient's body. It has been shown that conducting bacteriological studies in accordance with the requirements of regulatory documents allows obtaining reliable and comparable results necessary both for the optimal treatment of patients and for collecting and analyzing data on monitoring the emergence and spread of diseases of the respiratory system caused by pathogenic microflora.

The article is devoted to the development of a technology for obtaining organic fertilizers from poultry waste based on biocatalytic processes. Currently, many poultry farms have become sources of environmental pollution, thereby causing serious environmental problems and economic and social damage. The problem of reliable protection of the natural environment from pollution by bird droppings is currently relevant. In the area of operation of large poultry farms, air pollution by microorganisms, dust, foul-smelling organic compounds, which are decomposition products of organic waste, as well as nitrogen, sulfur, and carbon oxides, is possible. Bird droppings contain acids, nitrogen, phosphorus and potassium, heavy metals. The content of nitrogen, phosphorus and potassium changes dramatically depending on the quantity and quality of the feed. Humic substances isolated from brown coal have a sufficiently high sorption activity and are used as cheap sorbents for solving a number of environmental problems in industry. These studies are aimed at minimizing the main disadvantage of the anaerobic digestion process, the low reaction rate, which leads to the need to create large-volume bioreactors. On the basis of the research carried out, a technology has been developed for obtaining organic fertilizers from poultry waste by the method of anaerobic fermentation of chicken manure with humidity at a temperature of 27 °C - 50 °C with the addition of sodium humate. The resulting fertilizer is intended for use in agricultural production, horticulture, floriculture, forestry, municipalities, in household plots in order to increase the yield and quality of crop production. For the developed technology, an application has been submitted for obtaining a Patent for the invention of the Republic of Kazakhstan «Method for producing organic fertilizers» (priority No. 2021-22818, dated July 13, 2021). The invention allows to significantly reduce the time of fermentation, to enrich the product with organic and mineral products contained in sodium humate, to convert the salts of heavy metals into an insoluble state, to improve the environmental friendliness of the method.

The production of vaccine preparations before release requires standardization of their immunobiological parameters, especially safety and immunogenic efficacy. An indicator of the immunogenic effectiveness of the lumpy skin disease vaccine is the resistance of vaccinated cattle against the virulent virus. However, according to preliminary studies, the virulent control virus did not always cause clinical disease with characteristic symptoms when infected subcutaneously. The purpose is to develop a biological model in the form of a complex consisting of a pathogenic virus, a method of infection and a susceptible animal to assess the immunogenicity of a lumpy skin disease vaccine. Local cattle, intact from lumpy dermatitis, were used to reproduce lumpy dermatitis and develop the causative agent of the disease. As the initial infectious virus, we used a 20 % tissue suspension of nodules (skin nodules) obtained from cattle that fell ill with lumpy dermatitis in the field in the Atyrau region in 2016. As a viral mass to control immunogenicity, a 20 % suspension of skin nodules and edematous skin tissue at the site of the pathogen injection, obtained after the “refreshment” of the virus in animals, were used. The disease was reproduced by infection with the test suspension of the virus intradermally, subcutaneously, intravenously at a dose of 0.5 cm3 and titration on the skin of the animal. The effectiveness of the biological model was assessed by morbidity, severity of the course and severity of the manifestation of the disease. During primary intradermal infection with a field isolate of the virus, the disease manifested itself in one of three animals in the form of hyperthermia, depression, lacrimation, and the appearance of several nodular nodules in the skin of animals. The refreshed tissue virus caused clinical disease both in subcutaneous, intradermal and intravenous infection. But the clinical signs of the disease were more pronounced with intradermal inoculation of the virus, and with intravenous inoculation, it manifested itself in a more severe form with a fatal outcome. Inoculation of the virus intradermally into different areas of the skin led to the development of an independent skin lesion in each infected point in the form of painful edema, followed by necrosis, the size and intensity of which depended on the dose of the injected virus. This development of skin pathology made it possible to work out a method for determining the virus titer in vivo. The tissue virus obtained from the edematous tissue at the site of the pathogen injection was guaranteed to cause clinical disease in cattle during intradermal inoculation and made it possible to evaluate the immunogenic efficacy of the produced batches of vaccine against lumpy dermatitis.

The article is devoted to the development of technological parameters for the production of gluten-free pasta, as well as to the study of the influence of physico-chemical factors on the formation of the structure and organoleptic parameters of gluten-free pasta. The authors studied modern approaches to the production of gluten-free food in Kazakhstan. During the study, the main types of raw materials used in the production of gluten-free pasta of functional orientation were identified. For the production of a new product, a reasonable choice of raw materials and functional ingredients was carried out, the formulation and production technology were developed, all temperature and time modes were described, physico-chemical, organoleptic parameters of the new product were studied, a production flowchart was developed. The purpose of the article is to develop the technology of gluten-free pasta enriched on the basis of corn, rice flour and meeting the requirements for specialized food products, with the addition of functional and flavoring ingredients to expand the range of gluten-free products in the Republic of Kazakhstan. In experimental studies, the formula of a new gluten-free paste based on rice and corn flour with the addition of flaxseed flour, soy protein isolate «EdimCo», xanthan gum, dietary fiber (psyllium), Supermak booster was developed. The complex results of organoleptic and physico-chemical parameters of whole-grain flour for the production of new gluten-free pasta are presented. The results of organoleptic and physico-chemical indicators, as well as safety indicators of finished gluten-free pasta are presented. The article presents the technological parameters and time modes of the production process of fresh pasta, including the following basic operations: preparation of raw materials at t = 10 0C, kneading pasta dough at t = 40-45 0C, vacuuming at 40-10 kPa, pressing (extrusion) at 7 min, 10-12 MPa, drying and stabilization at 10-12 MPa, cooling of dried products t = 20-25 0C 4 hours, packaging of finished products at t = 35 0C and relative humidity 70 %.