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Year 1990, Volume 24, Issue 2
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Issue 1
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Possibility of the use of attractants to control pasture ixodids populations and ways of their search. P. 97-101.
Evaluation of all known ticks attractants was made to ascertain their suitability to be combined with pesticide in order to control populations of pasture ticks of the genera Ixodes and Dermacentor. Search for attractants among the pheromones of aggregation (for the genus Ixodes) and among substances determining the host's odour (for both genera) was concluded to be most promising.
in Russian
Simultaneous infection of Ixodes persulcatus ticks with agents of Lime's disease and tick-borne encephalitis. P. 102-105.
By means of individual bacteriological and virusological investigations of adult Ixodes persulcatus ticks and comparison of obtained results there has been established their simultaneous spontaneous infection with agents of Lime's disease and tick-borne encephalitis. A possible frequency of such mixtinfection in these vectors is being discussed.
in Russian
The ability of some species of fleas of common vole from high-mountain Daghestan to transmit and preserve plague agent. P. 106-112.
The infection ability and terms of preservation of plague microbe in fleas of common vole from Daghestan high-mountain plague focus (Frontopsylla caucasica, Megabothris turbidus, Ctenophthalmus intermedius and Amphipsylla rossica) was studied experimentally. Block formation and transmission of the infection by F. caucasica and M. turbidus was observed. The transmission of plague microbe by Ct. intermedius fleas was first carried out. These species of fleas preserve the infection for a long time. Experiments with fleas of A. rossica yielded negative results.
in Russian
The infection of sparrow-hawks of West-European and Indo-Asiatic directions of migration with haemosporidians (Sporozoa: Haemosporidia). P. 113-120.
The infection of sparrow-hawks of West-European and Indo-Asiatic directions of migration with Haemosporidia shows more similarities than differences. Two tendencies in the geographic distribution of Haemosporidia from Accipitridae are observed, such as the decrease in the extensity of infection with the species Leucocytozoon toddi in the direction from moderate latitudes of the northern hemisphere to tropical ones and the increase in the infection extensity with the species Haemoproteus nisi in Palaearctic from the north-west to south-east of the host's distribution area.
in Russian
Karyological investigations of trematodes of the families Allocreadidae, Plagiorchiidae and Gorgoderidae of north-western Chukotka. P. 121-127.
Chromosome sets of Bunodera lucioperca include 26 structural units of genome, among which the first two pairs consist of submetacentric-metacentric, the sixth — of subtelocentric elements. All the rest chromosomes are of an acrocentric type. The karyotype of Plagiorchis nanus consists of 22 chromosomes. The structure of the chromosome set is 6m+6sm+8sm-m+2st. In fertilized eggcells Phyllodistomum conostomum maritae have 16 chromosomes, the karyotype structure is 4m+8st+4a. Parthenites of Phyllodistomum sp. in diploid sets maintain 18 chromosomes, the karyotype structure is 2m+12st+4a (m — metacentric, sm — submetacentric, st — subtelocentric, a — acrocentric chromosomes). Interspecific defferences of chromosome sets in the genus Phyllodistomum were formed due to robertson translocations and pericentric inversions. The results of this investigation do not corroborate the conception of monophyletic origin of trematodes of the order Plagiorchiiformes. The existence of trematodes of B. luciopercae and phillodistome in reservoirs of Chauna lowland is connected with hosts' polyploidy.
in Russian
Structure of the karyotypes of Opisthioglyphe ranae, Paralepoderma brumpti and Skrjabinoeces sp. (Trematoda: Plagiorchiidae). P. 128-134.
The karyotypes of three species of trematodes belonging to the family Plagiorchiidae are described. The diploid number of chromosomes of O. ranae and Skrjabinoeces sp. is 22. The karyotype of P. brumpti consists of 10 pairs of chromosomes (2n=20). The karyotypes are composed mainly of biarmed chromosomes. The first pair of chromosomes in all analysed karyotypes is represented by large metacentrics, which comprise the significant part of genome (18 to 22 %). Comparison of numbers and morphology of chromosomes indicates that the karyotypes of these three species arose from one ancestral chromosome set. The possible evolutionary trends and mechanisms of divergence of karyotypes are discussed.
in Russian
Ultrastructure of acanthors of Polymorphus magnus (Acanthocephala: Polymorphidae): integuments and "penetration gland". P. 135-139.
Ultrastructure of integuments of embryonal larva of Polymorphus magnus is first described. Larvae are covered with a multilayer integumental complex similar to that of acanthors of other species as well as to that of acanthellae, cystacanths and adult thorny-headed worms. Armature consists of embryonal hooks, located on the anterior body end, and spines covering the other part of the body. In the anterior part of larvae there was recognised a zone of production and storage of secretory granules which, by analogy to embryos of other parasitic worms, is described as a "penetration gland". Secretory granules alongside with other armature elements are supposed to participate in the intermediate host invasion.
in Russian
The genus Hirundinicola Birova-Volosinovicova, 1969 status n. (Cestoda: Dilepididae) and its place in the system of dilepidids, parasites of swallows. P. 140-147.
The Institute of Zoology, Academy of Sciences of the Ukrainian SSR, preserves a large collection of cestodes of swallows which includes 12 species of cestodes. Among these are 9 species of dilepidids, specific parasites of these hosts. A group of species possessing numerous small (0.008—0.015 mm) hooks of proboscis, which form a zigzag crown, is analysed in detail. The history of description of species belonging to this group, their nomenclature, validity and position in the Dilepididae system, the validity of the subgenus Hirundinicola Birova-Volosinovicova, 1969 in particular, are discussed. On the basis of studying the original material there have been shown considerable differences of these cestodes from Vitta magniuncinata Burt, 1940 and Angularella beema (Clerc, 1906), the type species of corresponding genera. The subgenus Hirundinicola Birova-Volosinovicova, 1969 is assigned a status of distinct genus. Its diagnosis and redescription of the type species Hirundinicola chelidonariae (Spasskaja, 1957) comb. n. from house martins (Vinnitsa District) are given.
in Russian
Fleas of Spilopsyllus cuniculi, parasites of wild rabbit in the USSR. P. 148-151.
In colonies of wild rabbits in the south of the Ukraine (environs of the city of Kherson) and in the Crimea (near the city of Belogorsk) there were found in masse fleas of Spilopsyllus cuniculi (Dale). The highest abundance of these parasites in spring, its decrease in summer, minimum in early autumn and rise by winter, as well as great abundance of the parasites on pregnant doe rabbits, correspond to regularities which were observed in other parts of S. cuniculi distribution area.
in Russian
Efficiency of fleas of Rhadinopsylla rothschildi and R. dahurica as vectors of plague agent in the Transbaikalian natural nidus. P. 151-154.
Experiments have shown that a block of proventriculus arises in 2.1 to 12.5% of infected fleas of R. rothschildi and in 7.2 to 10.5% of R. dahurica. These fleas transmit the plague agent to different animals (Brandt's vole, narrowskulled vole, Dahurian souslik). The plague microbe is preserved in the organism of infected insects till the end of the experiment, 74 and 24 days respectively. Therefore, the fleas can play a part in the maintenance of plague epizootia in the Transbaikalian natural nidus.
in Russian
Aberrant parasitism of horse bot-flies (Diptera: Gasterophilidae). P. 154-156.
Alongside with a high intensity of infection of horses with bot-flies larvae there was observed mass aberrant parasitism of horse bot-flies in farms of Astrakhan, Gurjev and Ural Districts, and in the Kalmyk ASSR in 1980—1981 and 1987. As a result of extremely high aggregation of horse bot-flies larvae in their usual localization places, Gasterophilus pecorum larvae remained, due to interspecific competition, in nonspecific places (oral cavity, pharynx), adapted to new habitats and normally developed. Their number varied from 260 to 750 specimens. Localization of G. pecorum larvae in the mentioned departments of the alimentary canal results in serious morbidity of horses.
in Russian
Sensory system of Opistorchis felineus (Trematoda: Opisthorchiidae). P. 157-160.
Main peculiarities of Opistorchis felineus sensory system consist in the location of sensillae on the abdominal side of the body in the shape of two triangles in front of eye spots and regular hexagon behind them.
in Russian
Coeliotrema thynni, a rare dioceous trematode of tunnies from the tropical part of the Pacific. P. 160-164.
The paper presents a redescription and figures of Coeliotrema thynni Yamaguti, 1938 from the oesophagus wall and pyloric appendages of tunnies caught in the tropical part of the Pacific.
in Russian
Blastocystis galli sp. n. (Protista: Rhizopoda) from the intestine of domestic hens. P. 164-168.
A new species, Blastocystis galli, parasitic in blind processes of large intestine was found in domestic hens. Sizes of blastocysts are 7.5—35.0 X 6.25—30.0 (18.67 X 17.05) ϻm. The parasite form varies from round to ellipsoid. There were found stages with 1 to 4 nuclei and stages containing 8 to 32 small daughter individuals. Outside blastocysts are covered with structurized glycocalyx. Under glycocalyx there is a plasmatic membrane. Cytoplasm contains a great number of ribosomes and mitochondria with cristae resembling in their shape oval or round small sacs. Nucleus contains nucleolus. Chromatin mass is concentrated on one of the poles of the nucleus as individual bodies. Semilunar in form chromatin mass was not found. Golgi apparatus is represented by a number of plates grouped in a pile. Most part of the cell is occupied by reproductive organella divided by cytoplasmatic membranes into compartments. On the basis of its ultrafine organization. B. galli is assigned to the kingdom Protista, type Rhizopoda, class Lobosea, subclass Gymnamoebia, order Blastocystida.
in Russian
Book review. P. 169-170.
Summary is absent.
in Russian
Chronicle. P. 171-174.
Summary is absent.
in Russian