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Year 2017, Volume 51, Issue 2
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Neuroendocrine effects of helminthiases (a review). P. 97-103.
Nowadays the number of patients diagnosed with helminthiases shows tendency for steady growth around the world. During last few years, researches in the field of immunology have again turned their attention towards the question of parasitological immunity and tissue response. Helminthiases and other parasitic diseases in some instances can induce central nervous system disorders and violate human behavioral reactions. Studies have suggested an association between epilepsy and helminth infection, but a causal relationship is not established in many helminths, except perhaps with neurocysticercosis. The aim of this review is to reveal details of specific mechanisms of the general helminths' impact on the nervous system and the endocrine control level of physiological functions of the host organism. Finally, we discuss the current gaps in knowledge about the interaction between helminths, immunity, and human endocrine system.
in Russian
Ticks (Acari, Ixodidae) of the North Caucasus: species diversity, host-parasite relationships. P. 104-120.
Biological diversity of ixodid tick fauna of the North Caucasus is analyzed. On the whole, 38 tick species are represented in the fauna of the North Caucasus. Their distribution within the region, biotopic features, and host-parasite relationships at different stages of ontogenesis are considered.
in Russian
The quill mite Syringophilopsis fringilla (Fritsch) (Acari: Trombidiformes: Syringophilidae): the structure of receptor organs providing feeding of the parasite inside the feather quill. P. 121-131.
The structure of sensory organs situated on palps and inside the cheliceral stylet of the quill mite Syringophilopsis fringilla (Fritsch, 1958) was examined in scanning and transmitting electron microscopes. Eight sensilla of 3 types were revealed on palptarsus, including two contact chemo-mechanosensory sensilla, a single distant chemosensory (probably olfactory) sensillum, and 5 tactile mechanosensitive sensilla. All other sensilla situated on basal parts of the palp and on the outer surface of gnathosoma are represented by tactile mechanoreceptors. A proprioceptor sensillum was revealed in the movable digit of the chelicera; modified cilia of dendrites of 5 sensory neurons run in the inner non-sclerotized core of the stylet, ending at different levels as electrondense rods connected with the sclerotized wall of the stylet. The authors assume that the proprioceptor sensillum of the stylet detects the pressing force of the movable digit on the inner wall of the quill during piercing process, while palpal sensilla determine the optimal place for piercing.
in Russian
Gamasid mites of small mammals in the semi-desert territories of the Saratov trans-Volga region. P. 132-142.
The paper contains the data on the species composition and comparative analysis of gamaside mites, parasitizing on small mammals in the semi-desert territories of Saratov trans-Volga region. On the basis of the results of investigations conducted in the Aleksandrovo-Gaisky District in 2008—2013, 18 species of gamaside mites (9 genuses, 5 families) have been recorded. Nine species of gamaside mites, which were not found in semi-desert zone earlier were revealed, including Hypoaspis (Stratiolaelaps) miles Berlese, 1882, H. (Geolaelaps) heselhausi Oudemans, 1912, H. (G.) lubrica Oudemans et Voigts, 1904, Laelaps multispinosus Banks, 1909, L. jettmari Vitzthum, 1930, Cyrtolaelaps mucronatus G. et. R. Canestrini, 1881, Haemogamasus citelli Bregetova etNelzina, 1952, Hirstionyssus eusoricis Bregetova, 1956, Hi. ellobii Bregetova, 1956; five of these species are new for the territory of Saratov Province. As a result of the study of semi-desert zone of Saratov trans-Volga region and taking into account literary data, parasitic fauna of small mammals of Aleksandrovo-Gaisky District was expanded up to 21 species, and of Saratov Province, up to 44 species of gamasid mites.
in Russian
Influence of meteorological factors on the activity of the adult taiga tick (Ixodes persulcatus Sch., Ixodinae) in St. Petersburg and its environs. P. 143-157.
The article deals with influence of meteorological factors on the activity of the taiga tick Ixodes persulcatus Sch. in St. Petersburg and its environs. The results of correlation analysis of meteorological data (21 index) and data on ticks collected in 1980—2012 allowed determining linear dependence between 11 meteorological indices and average amount of ticks. Factor analysis reduced dimentionality down to 3 indices: sum of temperatures higher than +5.0°C, sum of precipitation higher than 5 mm per year, and Selyaninov hydrothermal coefficient. It was demonstrated that, at the background of the general tendency for the decrease of the average number of active ticks in the studied territories, correlation between the amount of ticks and meteorological indices can significantly vary as in the correlation density, so in the character and in dependence of microclimatic features of the collecting site. When variability of the mean abundance of ticks during years of investigation is low, the method of collecting can significantly affect the results of the statistical analysis. This fact must be taken in consideration during prognosis of both dates of the beginning of epidemiological season and its intensity.
in Russian
Description of virgulate Cercaria etgesii larva nov. (Xiphidiocercariae): a new type of virgula organ. P. 158-164.
A new species of virgulate cercaria is described. The morphology and chaetotaxy of cercariae are studied. The new type of virgula organ is described. Every description is illustrated by drawings.
in Russian
Henneguya wolinensis (Myxosporea: Myxobolidae), a new for Russian fauna parasite from the perch Perca fluviatilis L. P. 165-169.
The infection of the perch Perca fluviatilis L. with myxosporean Henneguya wolinensis Romuk-Wodoracki, 1990 has been detected. This is the second finding of this parasite after its original description and the first for Russia. Plasmodium of this species develops in the epidermis under scales throughout the body causing the formation of white cysts up to 1 mm. Spores are fusiform, large, their average length constitutes 25.5 μm without the caudal appendages and 62 μm with them. Slight morphological differences in spore structure comparing to original description have been revealed.
in Russian