Evolution of parasitism in mammal-associated mites of the group Psoroptidia (Acari: Astigmata). P. 257-272.
Host-parasite relationships of mammals and astigmatan mites (Acariformes: Astigmata) belonging to the parvorder Psoroptidia are analyzed. The absolute majority of mammal-associated psoroptidians belongs to the paraphyletic superfamily Sarcoptoidea. Mites of the family complex Psoroptidae (Lobalgidae, Psoroptidae, and Paracoroptinae) shifted from birds to placental mammals independently from each other. Mites of the family complex Sarcoptidae, including all other sarcoptoid families, derived from the common stalk of Psoroptidia independently from the Psoroptid complex. Mites of the sarcoptid complex shifted from nidicoly in mammalian nests to the permanent parasitism on these hosts. They are widely represented on both marsupial and placental mammals and are absent on Monotremata.
in RussianDetection of DNA of Erlichia and Anaplasma in ticks Ixoded trianguliceps in Tyumen Province. P. 273-276.
The data on the study of Ixodes trianguliceps Bir. collected from small mammals in the southern taiga forests of Tyumen Province with the PCR-hybridization with fluorescent detection method are given. DNA of Erlichua and Anaplasma was revealed in ticks of this species for the first time; mixed infection with both these pathogens was also demonstrated.
in RussianSeasonal dynamics of the parasite fauna and of the component community structure of parasites of the minnow Phoxinus phoxinus (L.) from the Pechora river. P. 277-286.
The material represented by 120 specimens of minnow of the age 2+-3● was collected according to the standard technique from the Pechora River of the Pechora-Ilechsky reserve in the region of Central homestead during May—September 2006. Three stages of the component parasite community included: the community in the process of formation (May—June), the formed community (June), the destroying community (July and August), the community in the process of formation (August and September).
in RussianDiversity of trematode larvae in gastropod mollusks in water bodies of Belarus. P. 287-305.
The analysis of literary data and own investigations of gastropod molluscs on existence of cercariae of trematodes in Belarus was carried out. 13 856 specimens of 11 species and 2 species complexes of freshwater gastropod molluscs were examined on infection with cercariae of trematodes in 2010 by the authors of this article. Total infestation was 13.1 % and infection of some molluscs species varied from 0.4 % (Dnieper River, Gomel region) to 66.7 % (Lukomskoe reservoir, Vitebsk region). The cercariae of 90 trematode species were found. The majority (51 species) at the adult stage parasitize birds. The cercariae of 14 trematode species have medical significance.
in RussianSome results of the study of the trematod fauna of the fresh-water mollusks Melanopsis praemorsa (L.) from water bodies in Azerbaijan. Communication 4. New species of cyathocotylid cercariae. P. 306-316.
Pictures and descriptions of morphology and differential diagnosis of two new species of cyathocotylid cercariae — Cercaria agstaphensis 37 and Cercaria agstaphensis 38 are given. Special attention is paid to the structure of the glandular apparatus, excretory system, tegument armature, and other individual peculiarities of cercariae.
in RussianThe influence of insulin on contamination of the common carp Cyprinus carpio by the monogenetic fluke Dactylogyrus vastator. P. 317-323.
The influence of insulin on the contamination of the carp Cyprinus carpio with the monogenetic fluke Dactylogyrus vastator is studied. Fishes reacted to the introduction of the hormon by the decrease in the degree of intensity of infection and by the increase in the number of lifeless parasites on gills, by contrast to control fishes and fishes processed with stress hormones (adrenaline and cortisol). We assume that the decrease in the abundance index in live monogenetic fluke and the increase in the number of lifeless oness is caused by the deficiency of nutrients accessible for the growth and development caused by activation of hormone-induced anabolic processes and stimulation of mechanisms of immune protection.
in RussianShould microsporidian spores be treated as dormant stages? P. 324-337.
Spores of bacteria, fungi, microsporidia and other protists are traditionally treated as dormant stages, intended to the long-term survival in the environment and to activation of parasitic forms during the infestation of a new host. However, in the process of examination of insect microsporidia at the molecular cellular levels and also at the level of organisms and populations, we came to a conclusion that spores are very active developmental stages with the entire potential directed to the rapid and successful infestation of new hosts during contact with the later. The work summarizes the original data demonstrating (1) the necessity of the rapid activation of microsporidian spores during host contact, (2) hopelessness of the long retaining of viability by spores of many microsporidia in the environment after leaving host organism; and (3) specific accumulation of metabolic ferments in "dormant" spores, but not in actively proliferating prespore developmental stages. On the basis of these data we conclude that microsporidian spores tend to shorten the period when they stay outside host organism to the maximal degree. The probability of host infestation within the limited time period increases due to diverse modes of transmission of pathogens, accumulation of maximally possible volume of infective spores, and the rapid mobilization of the extrusion apparatus.
in Russian
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