Parazitologiia最新文献

The paper summarizes long-term experience of accumulating and summarizing thefaunistic information by means of separate databases (DB) and information analyticalsystems (IAS), and also prospects of its representation by modern multi-user informationalsystems. The experience obtained during development and practical use of thePARHOST1 IAS for the study of the world flea fauna and work with personal databasescreated for the study of bloodsucking insects (lice and blackflies) is analyzed. Researchcollection material on type series of 57 species and subspecies of fleas of the fauna of Russiawas approved as a part of multi-user information retrieval system on the web-portal ofthe Zoological Institute of the Russian Academy of Sciences. According former investigations,the system allows depositing the information in the authentic form and performingits gradual transformation, i. e. its unification and structuring. In order to provide continuityof DB refill, the possibility of work of operators with different degree of competenceis provided.

Drawing, description and characteristics of Rhadinorhynchus cololabis, registered forthe first time from Oncorhynchus masou in the Sea of Japan (northern part of PrimoryeTerritory) are given. Ten species of acanthocephalans from the cherry salmon in the PrimorskyTerritory were recorded.

The article reports new findings of rare and poorly known mite species of the genusSpinturnix von Heyden, 1826 (Gamasina: Spinturnicidae) parasitizing bats of the generaMyotis and Barbastella in Russia and Tadjikistan.

Xenomonitoring (detection of filarial larvae in mosquitoes) of vectors of dirofilariasiswas performed in 2009—2013 in vectors collected in southern and northwestern regions ofthe Russian Federation. In Rostov, Astrakhan, Krasnodar, and Novgorod Provinces and inthe Republic of Adygea the degree of infestation of mosquito larvae with Dirofilaria constituted1.8 ± 0.2 % (66/3590), 0.9 ± 0.4 % (4/470), 0.8 ± 0.2 % (11/1382), 0.7 ± 0.4 %(3/438), and 0.5 ± 0.5 % (1/190), respectively. Total degree of infestation of mosquitoeswith larvae of Dirofilaria spp. constituted 2.3 ± 0.3 % (45/1936), 1.9 ± 0.4 % (25/1334),and 0.6 ± 0.1 % (15/2713) in Aedes (Meigen, 1818), Culex (Linnaeus, 1758), and Anopheles(Meigen, 1818). No microfilariae were found in Culiseta (Felt, 1904) (0/87).

The article provides the data on the incidence of malaria in Tomsk Province since 1935till present. The results of phenological observations of malarial mosquitoes (Diptera: Culicidae)performed in 2005—2014 in southern Tomsk Province are given. Key dates in lifeof mosquitoes are determined, including the beginning of departure from wintering sites,emergence of the first preimaginal stages, departure of the first generation of imagoes, thebeginning of the 54rr7yu6t' diapause. Terms of the period of possible transfer of malariain southern Tomsk Province are retrospectively calculated.

Hematological and plasma biochemical analyses and parasitological detection werecarried out in the herring gull Larus argentatus. Hematological and plasma biochemicalparameters in uninfected gulls and gulls infected by Diphyllobothrium dendriticum (Cestoda:Diphyllobothriidae) were compared. Hemoglobin content and numbers of erythrocyteswere reduced; numbers of leukocytes and sorption capacity of erythrocytes wereimproved in blood of the infected herring gulls. Hematological index (eosinophil/lymphocyteratio) in infected gulls increased 1.8 times in comparison with eosinophil/lymphocyteratio in uninfected gulls. Metabolic imbalances in herring gulls infected by D. dendriticumwere determined. Levels of the total protein, phospholipids, triglyceride, phosphorus, calcium,magnesium and sodium, and the activity of alkaline phosphatase decreased in plasmablood of infected gulls; at the same time, the content of the uric acid, glucose, modifiedalbumin and circulatory immune complex and activities of transaminases and lactate dehydrogenasehad increased. It is assumed that the obtained results testify to the appearanceof abnormalities in the digestion processes and the activity of immune and circulatory systemscaused by the invasion of gulls with D. dendriticum.375

The results of the parasite fauna research represent peculiarities of formation and ecological,faunistic and zoogeographical characteristics of parasite fauna of the small redfishSebastes viviparus Krayer. 1845. This species is distinguished among the other North AtlanticSebastes by the richest fauna of myxosporidians, trematodes, nematodes and acanthocephalans.The parasite fauna of S. viviparus is formed mainly of boreal species and toa lesser extent of Arctic-boreal species. According to the vertical zonality of parasites infishes of the North Atlantic they are mainly represented by mesobenthic and epicontinentalspecies. The parasite fauna in small redfish possesses significantly more pronounced geographicspecificity than that of other North Atlantic Sebastes species.

The data on the fauna, abundance and prevalence of chewing lice collected from 360specimens of 13 sedentary species of passerine birds in Yakutia are given. A total of 3206chewing lice specimens belonging to 27 species of 6 genera were found. Most exploredbird species were infested with several chewing lice species. We assume exchanges of parasitescould take place between some bird species in the region explored.

Studies of the phenotypic structure of Ixodes persulcatus (Schulze, 1930) populationsin relation to their exoskeleton abnormalities are important in both theoretical and practicalrespects. The data on the species' population structure in Asiatic part of Russia arefragmentary. The goal of the study was to describe taiga tick population structure based onthe pattern of females' exoskeleton abnormalities revealed in Asiatic part of Russia.A total of 3872 I. persulcatus females from 16 geographically remote sites of Far Eastern,Siberian, and Ural Federal Districts (FEFD, SFD, and UFD accordingly) were studied.It was demonstrated that all the populations possessed specimens with exoskeletonabnormalities. The «shagreen skin» abnormality was dominant in all these areas. At the sametime, the percentage of abnormalities among the specimens collected to the north of55°N is considerably higher (63.4 ± 3.39 %) than that of samples from the SFD southwardterritories (33.1 ± 3.43 %). The frequency of abnormalities in its turn is lower(24.4 ± 1.93 %) in the females from the territories with moderate monsoon and moderatecontinental climate (FEFD) than that in specimens from SFD and UFD areas with sharpcontinental climate. Thus, such polymorphism of the females' exoskeleton structure mayreflect the natural phenogeographical variability of the character rather than the result ofthe anthropogenic impact.403