The aim of the study was to identify viruses contained in female Ae. albopictus mosquitoes using de novo metagenomic sequencing. Mosquitoes were collected using standard entomological methods in August 2019 in the Kuban in Tuapse, Adler, on the territory of the Adler Monkey Nursery and in the city of Gagra, Abkhazia. Adults were identified by morphological characteristics. A total of 1,336 mosquitoes were caught. We formed four pools at the collection site, with 300 to 400 specimens in each. The virus was considered detected if a specific nucleotide sequence of at least 1000 bases was detected in the mosquito sample. A total of 8 insect viruses were identified. Four viruses are classified and belong to the families Rhabdoviridae, Orthomyxoviridae, Chuviridae. The families of the other four viruses have not yet been determined, but two viruses are classified in the order Bunyavirales. No viruses pathogenic for humans were detected.

An individual study of ixodic ticks collected in various subjects of the Northwestern Federal District of Russia was conducted for the presence of DNA of procysts of the genus Babesia in them. A total of 1628 ticks collected in 2022-2023 were studied. The ticks belonged to three species: Ixodes ricinus, I. persulcatus and Dermacentor reticulatus. The DNA of Babesia spp. it was detected by PCR. Fragments of babesia DNA were found in the body of three individuals of I. persulcatus (0,3 %) and 12 individuals of I. ricinus (1,8%), while all ticks of D. reticulatus showed a negative result. Babesia DNA was most often detected in ticks from the Pskov region (2,4 %), and the average infection rate of ticks was 0,9 %. The data obtained can contribute to the development of measures for the control and prevention of babesiosis.

The article presents data on the study of female mosquitoes for the DNA of dirofilariae, and assesses the likelihood of microfilariae development in the vector organism from the first instar (L1) to the invasive stage (L3) in the climatic conditions of the North-Western part of the Moscow region. Mosquitoes were studied based on the data on localization of larvae of different instars in the vector organism.
A total of 4000 female mosquitoes belonging to 15 species of the genera Culex, Anopheles and Aedes (Ochlerotatus) were studied for three years.
It was found that of the microfilariae obtained by a mosquito during contact with a warm-blooded host, about a 25% survive to the invasive stage, which by the end of summer constitutes approximately 2 % of “dangerous” female mosquitoes from the total natural population.
When bitten by an infected mosquito, the probability of D. immitis infestation in the Moscow region was about 37,6 %, D. repens - 62,3 % of the total number of female mosquitoes capable of transmitting L3 microfilariae.

The article provides data on the epidemiological situation on the incidence of echinococcosis in residents of the Chon-Alai district of the Osh region of the Kyrgyz Republic, and analyzes the dynamics of the incidence of echinococcosis for the period 2000-2022. In the Chon-Alai district of Osh region, the average long-term intensive incidence rate of echinococcosis per 100 thousand population was 26,2, the minimum was 4,1 (2004) and the maximum was 87,0 (2015). In the Chon-Alai region, the highest incidence of echinococcosis was noted among residents of the village Kashka-Suu, village Zhash-Tilek and in the village Karamyk.

Dairy goat farming is a developing sector of agriculture in the Russian Federation. The product of the production is goat milk, which is less allergenic than cow milk, similar in nutrients to human milk. The main condition for obtaining a valuable dairy product is the health status of the mammary gland of animals. One of the common diseases of the udder is mastitis. Mastitis, clinical and subclinical, occurs due to the impact of various factors on the body of lactating animals, including helminthic invasion. The impact of helminths on the body of farm animals increases due to resistance to anthelmintics.
The object of the study was a group of 20 lactating Saanen goats. The subject of the study were fecal samples and samples of mammary gland secretion. The extensiveness of S. papillosus invasion was 100 %. In milk samples before deworming, representatives of opportunistic microflora were found, exceeding the permissible amount in the secretion of the mammary gland and exhibiting various pathogenicity factors. A decrease in the incidence of subclinical mastitis was revealed with a decrease in the extent of invasion after deworming.

The article provides an analytical review of the influence of ecosystem factors on the Eurasian natural foci of ixodes tick-borne borrelioses. The mechanisms and limits of the impact of the most important biotic and abiotic factors on the patterns of functioning of parasitic systems and the epidemic potential of natural foci are considered separately. The revealed nodal parameters can be used to further improve epidemiological surveillance of this group of infections.

In this paper, based on our own research and analysis of literature data, we describe the morphology of ticks, symptoms and clinical signs, as well as diagnostics for rat-mite dermatitis in humans caused by bites of gamazoid ticks belonging to the species Ornithonyssus bacoti. The paper is illustrated with original photographs.

At the present stage, the effective system of maternity and childhood protection of the Mongolian People's Republic functions thanks to the invested work of Soviet doctors. The article provides updated information about the first pediatrician of Mongolia, a Soviet doctor, a representative of the Buryat people Sergi-Mydyk Tsyrendorzhievna Dasheeva.

The Clinical Diagnostic Laboratory of Martsinovsky Institute of Medical Parasitology, Tropical and Vector-Borne Diseases, I.M. Sechenov First Moscow State Medical University continues to share its experience in diagnosing rare, unusual and/or ambiguous cases of parasitosis in publications. The article describes two cases of suspected intestinal microsporidiosis. The difficulties and the probability of error of the microscopic method in the identification of intracellular protozoa on histosections are discussed.