| virus- and rickettsia-like structures in gut cells of dermacentor marginatus nymphs. | | 1976 | 11674 |
| massive occurrence of rickettsiae of the spotted fever group in fowl tampan, argas persicus, in the armenian s.s.r. | fowl tampans (argas persicus) collected in oktemberyan in the armenian s.s.r. in 1974 were found to be massively infected with rickettsiae of the spotted fever (sf) group. one isolated rickettsial strain, designated armenia 9, is antigenically related to, and probably identical with, strain armenia 11 and strain b of rickettsia slovaca, isolated from dermacentor marginatus ticks. strain armenia 9 grows readily in chick embryo yolk sacs and in chick embryo cell (cec) and l-cell cultures. it cause ... | 1977 | 22239 |
| razdan virus, a new ungrouped bunyavirus isolated from dermacentor marginatus ticks in armenia. | a virus, designated razdan, was isolated from dermacentor marginatus ticks in the armenian s.s.r. in 1973. the complement fixation tests revealed no antigenic relationships to 74 tick-borne arboviruses. the size of the virus is about 100 nm; it agglutinates goose erythrocytes at ph 5.5--7.0, is pathogenic for newborn, 14-day-old and adult white mice and multiplies in primary and continuous cell cultures. morphological properties of the virus permit its classification as a member of the family bu ... | 1978 | 35950 |
| isolation of tettnang virus from ticks, mosquitoes and small rodents. | seven strains of tettnang virus were isolated in czechoslovakia: 3 from ixodes ricinus tick nymphs, males and females, one from dermacentor reticulatus tick females, one from aedes cantans mosquitoes and two strains from the brains of clethrionomys glareolus and apodemus flavicollis small rodents. | 1979 | 35963 |
| electron microscopical studies on the development of babesia canis (sporozoa) in the salivary glands of the vector tick dermacentor reticulatus. | the formation of sporozoites of babesia canis was studied by light- and electron microscopy in the salivary gland cells of adult female ticks from the 2nd day after attachment until 1 day after detachment. it was found that this process was initiated by the binary division of kinetes that had already entered or entered during the period examined. during division the kinetes (15 x 2.5 microns) lost their typical organelles, reduced their three-layered pellicle to a single membrane and became sphe ... | 1979 | 43086 |
| [control of the tick dermacentor marginatus]. | | 1975 | 56080 |
| detection of the rocky mountain spotted fever agent, rickettsia rickettsii, in dead ticks, dermacentor andersoni. | rickettsia rickettsii remained viable and retained chromophilic properties for not more than 24 h after dermacentor andersoni were killed by freezing. antigenic reactivity was detected for at least 71 days by direct immunofluorescence. however, rickettsiae in ticks suffocated with mineral oil remained pathogenic for at least 14 days. accordingly, ticks removed from a host by mineral oil or dying from desiccation in transit are still suitable for rickettsial examination. | 1978 | 97233 |
| distribution and prevalence of spotted fever group rickettsiae in ticks from south carolina, with an epidemiological survey of persons bitten by infected ticks. | live ticks removed from human hosts were tested for the presence of spotted fever group rickettsiae from 1974 through 1976. spotted fever group rickettsiae were detected in dermacentor variabilis, amblyomma americanum, amblyomma maculatum, and ixodes scapularis. persons from whom positive ticks were removed in 1974 and 1975 were questioned about ensuing illness. eleven of 51 persons from whom rickettsia-positive d. variabilis were removed reported some unexplained combination of symptoms compati ... | 1978 | 103448 |
| rocky mountain spotted fever in connecticut: human cases, spotted-fever group rickettsiae in ticks, and antibodies in mammals. | three parameters were used in 1976 and 1977 to assess the status of rocky mountain spotted fever (rmsf) in connecticut--compilation and review of clinical data on suspected human cases for the 13-year period 1965--1977, examination of tick tissues for spotted fever-group rickettsiae by the hemolymph test and direct immunofluorescence, and analyses of mammalian sera for antibodies against rickettsia rickettsii. there were six presumptive rmsf cases which probably originated in connecticut. four o ... | 1979 | 111543 |
| experimental transmission of kyasanur forest disease virus by dermacentor auratus supino. | | 1979 | 116962 |
| [importance of ixodid ticks in the transmission and preservation of the causative agent of crimean hemorrhagic fever in foci of the infection]. | experimental infection of hyalomma plumbeum panz., rhipicephalus rossicus jak. et k. jak. and dermacentor marginatus sulz. with the virus of the crimean hemorrhagic fever has shown that preimaginal phases of the above ticks easily receive an infection agent from the infected donor, preserve it for a long time, transmit it through a bite during feeding to susceptible animals; during metamorphosis they transmit this agent to the subsequent developmental phases as well as to the progeny of the infe ... | 1976 | 134339 |
| the influence of various factors on fluid secretion by in vitro salivary glands of ixodid ticks. | 1. salivary glands of the female ixodid tick, dermacentor andersoni, secrete fluid in vitro when bathed in a slightly modified version of the mammalian tissue culture medium 'tc 199'. 2. rate of salivation in vitro increases with progression of feeding, but there is no comparable increase in dry weight of the salivary glands during the early phase of engorgement. engorged ticks secreted at only 25% the rate of 90-250 mg ticks, indicating that salivary gland degeneration has already begun in the ... | 1976 | 180228 |
| discriminant analysis: a method of identifying foci of vector-borne diseases. | identification of foci of vector-borne diseases does not require knowledge of exact abundances of vectors and pathogens; rather, a focus is defined by the presence, or some minimal level of abundance, of a vector and pathogen. stepwise discriminant analysis (da) was applied to data on free-ranging adult wood ticks (the vector) and to data on isolations of colorado tick fever virus from small mammals. trap stations were grouped on the basis of relative abundance of wood ticks for one set of analy ... | 1979 | 223462 |
| isolation of spotted fever group and wolbachia-like agents from field-collected materials by means of plaque formation in mammalian and mosquito cells. | three isolations from ticks (dermacentor occidentalis) of a rickettsia of the spotted fever group and 5 isolations from chipmunk (eutamias rugicaudus) blood of a wolbachia-like agent were obtained from plaques formed in singh's aedes albopictus (mosquito) and vero (african green monkey kidney) cell cultures. these organisms could not be isolated by injection of the infected ticks or blood into embryonated chicken eggs, guinea pigs, or voles (microtus pennsylvanicus), but fluid cultures of grace' ... | 1975 | 241251 |
| cytogenetics of mites and ticks. | | 1977 | 319744 |
| ticks of small mammals from the hindu kush (afghanistan). | during the first czechoslovak expedition to the east hindu kush in june-september 1965 a total of 193 hosts belonging to 12 species was examined on the presence of ticks. specimens of the genera ixodes, haemaphysalis, dermacentor and rhipicephalus were found. data and comments are given for the species collected. | 1977 | 342370 |
| [epidemiologic study on sheep ticks (dermacentor marginatus) of rickettsial infections]. | | 1978 | 346339 |
| the location of tick salivary antigens, complement and immunoglobulin in the skin of guinea-pigs infested with dermacentor andersoni larvae. | using indirect immunoflorescence techniques, tick salivary gland antigens (sga) were demonstrable in cement deposited on the skin by ticks and in all layers of the epidermis of infested guinea-pigs close to the sites where ticks attached. the antigen remained in these sites for several days after ticks had detached. in tick-resistant but not in normal guinea-pigs, sga, complement and igg were deposited at the dermo-epidermal junction even at some distance from the attachment site. complement was ... | 1979 | 391694 |
| nosema parkeri sp. n., a microsporidan from the argasid tick, ornithodoros parkeri cooley. | nosema parkeri sp. n. is described from nymphs and adults of the argasid tick, ornithodoros parkeri cooley, from a laboratory colony. schizogonic and sporogonic stages are described from various tick tissues. spores are binucleate, measuring 3.2 (3-4) x 1.9 (1.8-2.5) micronm. transmission is transovarial and transstadial. the parasite does not appear to affect adversely the development or reproduction of the tick. dermacentor andersoni stiles was experimentally infected. attempts to infect swiss ... | 1977 | 405484 |
| [isolation of rickettsia of the spotted fever group (sf group) from dermacentor marginatus ticks in tirol, austria]. | | 1977 | 410728 |
| [babesiosis in dogs in the netherlands (author's transl)]. | in recent years, babesiosis is frequently observed in dogs which have been on holiday with their owners in southern europe. the epidemiology and wide variety of symptoms are discussed. satisfactory results were obtained on treatment with berenil (hoechst) and acaprin (bayer). in addition to tick control, imizole (burroughs wellcome) might be adopted in preventive treatment. | 1979 | 432881 |
| acquired resistance to ticks: expression of resistance by c4-deficient guinea pigs. | hartley and c4-deficient guinea pigs developed resistance to the ixodid tick. dermacentor andersoni, after one infestation. resistance was characterized by resistant animals of both groups allowing significantly fewer larvae (5--25%) to engorge during a second infestation than during an initial infestation (70--90%). resistant animals in both groups developed cutaneous reactions at the site of tick attachment which were characterized by intraepidermal vesicles containing numerous basophils. in p ... | 1979 | 453452 |
| overwintering cycles in dermacentor ticks. | | 1979 | 453635 |
| the effect of the temperature regime on dermacentor variabilis (say) populations in eastern north america. | | 1979 | 474059 |
| dermacentor variabilis (say) larval activity in wisconsin. | | 1979 | 474060 |
| tick paralysis in a grey fox. | one hundred seventeen dermacentor variabilis were removed from the head and back of a grey fox (urocyon cinereoargenteus) showing paresis and diminished motor reflexes of the hind limbs. rapid and total recovery led to a diagnosis of tick paralysis. | 1979 | 480518 |
| dermacentor albipictus on moose (alces alces) in ontario. | fifty-five moose (alces alces) collected from 1963 to 1965 in the chapleau crown game preserve of northern ontario were examined for ectoparasites. dermacentor albipictus was the only parasite recovered. d. albipictus was absent from 15 moose examined during june, july and august; first observed on 1 or 2 moose examined in september; and present on all 38 moose collected from october to may. ticks were not evenly distributed on the body. infestations varied from 32 to 13,490 ticks/moose for 14 i ... | 1979 | 480519 |
| resistance to tick-borne francisella tularensis by tick-sensitized rabbits: allergic klendusity. | mammals become hypersensitive to ticks that feed upon them. that hypersensitivity was thought responsible for an observation that a large number of francisella tularensis-infected dermacentor variabilis failed to infect a rabbit previously exposed to ticks of that species. in a series of tests of that hypothesis, rabbits sensitized to ticks were often significantly more resistant than control animals to tick-borne tularemia. the conditions that determine the klendusity are thought to be variable ... | 1979 | 484770 |
| [images of various human parasites by scanning electron microscopy]. | | 1979 | 496215 |
| comparisons of the foveae dorsales in male and female ixodid ticks amblyomma americanum, a. maculatum, dermacentor andersoni and d. variabilis (acari: ixodidae). | | 1979 | 537001 |
| further observations on the behavior of adult males of dermacentor variabilis (a cari: ixodidae) with respect to attached females. | | 1979 | 537012 |
| distribution of the american dog tick, dermacentor variabilis (say), and its small-mammal hosts in relation to vegetation types in a study area in nova scotia. | | 1979 | 540270 |
| ectoparasites of sympatric barbary sheep and mule deer in the texas panhandle, usa. | | 1979 | 541816 |
| rickettsiae of the spotted fever group in hungary. | rickettsiae were detected by haemocyte test in 7.2% of dermacentor marginatus and 4.7% of d. reticulatus ticks collected in hungary. six strains of rickettsiae were isolated from positive specimens. these rickettsiae according to cfr are closely related, probably identical with r. slovaca and they represent the first rickettsiae of the spotted fever group found in that country. | 1979 | 544393 |
| the basophil response in blood and bone marrow of tick-infested guinea pigs. | the concentrations of basophils in blood and bone marrow were monitored in guinea pigs subjected to primary and secondary infestations with larvae of dermacentor andersoni. in these guinea pigs a significant increase of basophils was evident in peripheral blood. the response following the secondary infestation was more rapid and more intense than that following the primary infestation. similar changes were also shown to occur in bone marrow. the possible significance of these responses in relati ... | 1979 | 548160 |
| bovine anaplasmosis transmission studies conducted under controlled natural exposure in a dermacentor andersoni = (venustus) indigenous area of eastern oregon. | in anaplasma marginale transmission studies conducted on the high semi-arid range of eastern oregon during the 1974 and 1975 vector season, a marginale-susceptible calves (principals) were maintained on 2 raised tick-proof platforms. anaplasmosis-susceptible control calves of approximately the same age and latent-infected cows grazed the area surrounding the platforms. one latent-infected steer spent the entire 1975 vector season on a platform with the principals. the 28 principals did not devel ... | 1977 | 557939 |
| biochemical and physiological studies of certain ticks (ixodoidea). phospholipid classes in eggs, larvae, and hemolymph of argas (persicargas) arboreus (argasidae) and dermacentor andersoni (ixodidae). | | 1977 | 564965 |
| establishment and characterization of a diploid cell line from the tick, dermacentor parumapertus neumann (acarina: ixodidae). | establishment of a continuous cell line (rml-14) from embryonic tissues of the tick dermacentor parumapertus neumann is reported. the culture medium employed consisted of a combination (2:1) of eagle's and l-15 (leibovitz) media supplemented with 20% fetal bovine serum, 10% tryptose phosphate broth, and 0.1% bovine plasma albumin. at the 8th passage, 99% of dividing cells had the female chromosome complement, among which more than 70% had a diploid chromosome number of 22. at the 13th passage, c ... | 1977 | 592041 |
| relative susceptibility of jamaican strains of boophilus microplus, amblyomma cajennense, and anocentor nitens to various acaricides. | | 1977 | 604370 |
| [physiological age of imago of ixodid ticks and a rapid method of its determination]. | | 1977 | 604735 |
| biochemical and physiological studies of certain ticks (ixodoidea). total lipids and phospholipids during oogenesis and embryogenesis of dermacentor andersoni (ixodidae) and argas (persicargas) arboreus (argasidae). | | 1977 | 606821 |
| acquired resistance to ticks. iii. cobra venom factor and the resistance response. | | 1977 | 608679 |
| feeding performance, survival and appearance of dermacentor variabilis nymphs (acari: ixodidae), as influenced by host resistance. | | 1977 | 609084 |
| acquired resistance to ticks. iv. skin reactivity and in vitro lymphocyte responsiveness to salivary gland antigen. | | 1978 | 627407 |
| seasonal dynamics of american dog tick, dermacentor variabilis (say), populations in southwestern nova scotia. | | 1978 | 630475 |
| acquired resistance to ticks. iii. cobra venom factor and the resistance response. | guinea-pigs developed resistance to larvae of the ixodid tick, dermacentor andersoni, after one infestation. resistant hosts were characterized by allowing significantly fewer larvae to engorge than non-resistant hosts. larvae engorging on non-resistant hosts had a mean weight six times that of larvae obtained from resistant hosts at the end of a 5-day infestation. this immunologically based resistance was previously shown to have a cell-mediated and a humoral component. in an attempt to ascerta ... | 1978 | 631873 |
| influence of various conditioning photoperiods on the subsequent feeding activity of dermacentor variabilis nymphs (acari: ixodidae). | | 1978 | 633304 |
| ecto- and endoparasites of the black bear in northern wisconsin. | parasites collected from free-ranging black bears, ursus americanus, in northern wisconsin included dermacentor variabilis, d. albipictus, ixodes scapularis, demodex sp., trichodectes pinguis euarctidos, baylisascaris transfuga and dirofilaria ursi. mange, possibly caused by the demodex sp., also was observed. dental caries were common and periodontal disease was observed in one animal. | 1978 | 633522 |
| ultrastructure of the foveal glands of the ticks, dermacentor andersoni stiles and d. variabilis (say). | the foveal glands of dermacentor variabilis appear to consist of 2 cell types. the outer cells (type i) are active, with large areas of abundant finely granular material, apparently precursors of the mature secretory granules. the inner cells (type ii) are apparently storage cells. they are highly vacuolated and contain coarsely granular material as well as presumably mature secretory granules. the foveal glands of d. andersoni contain only type ii cells with extensive accumulations of presumabl ... | 1978 | 660384 |
| effects of two juvenile hormone analogs and beta-ecdysone on nymphal development, spermatogenesis, and embryogenesis in dermacentor variabilis (say) (acari: ixodidae). | | 1978 | 660393 |
| [effect of the physiological state of ticks on the intensity of tick-borne encephalitis virus replication in them]. | the features of tick-borne encephalitis (tbe) virus reproduction in ixodes ricinus and dermacentor anderson ticks were studied in relation to the age of ticks, duration of fasting, feeding, and conditions of keeping the ticks before and after the experiment. parenteral infection of ticks at various intervals after molting showed that the most favourable conditions for reproduction, survival, transphase and transovarial transmission of the virus occurred when the virus was given to the ticks in t ... | 1978 | 664624 |
| chemosterilization of dermacentor variabilis say (acari: ixodidae). i. effects of metepa on the cytology and fertility of males treated as unfed adults. | the effects of metepa on the cytology and fertility of male dermacentor variabilis treated as unfed adults are determined. evidence of cellular damage is found in testicular areas where actively dividing cells and some enlarging spermatocytes are found. the amount of cellular damage correlates positively to the concentration of the chemosterilant and results in decreases numbers of spermatids. in crosses of treated males to untreated females, resulting egg masses hatch normally; however, the per ... | 1978 | 682072 |
| natural infection of the tick dermacentor reticulatus (fabr.) with the microsporidian nosema slovaca weiser et rehácek in slovakia. | a total of 6,199 adult ticks (haemaphysalis intermis, dermacentor reticulatus, d. marginatus and ixodes ricinus) collected in three localities in slovakia were examined for microsporidian infection. the spores of nosema slovaca were found in six d. reticulatus (0.097%). the microsporidian experimentally inoculated into the hemocele of half-engorged females of d. reticulatus caused acute infection and death of the host. the infection can be transmitted also to other tick species from the same reg ... | 1978 | 689565 |
| preparation of primary cultures of tick cells. | primary cell cultures were prepared from preimaginal bodies from the nymphal ticks, rhipicephalus sanguineus, dermacentor andersoni, and amblyomma maculatum, and from the hemocytes of late-stage nymphal and adult ticks, ornithodoros coriaceus. the dissection methods for obtaining preimaginal bodies and hemocytes for culture are described. a culture mediu, designated rml 375, was used for both culture methods. primary cultures were established with minimal contamination. preimaginal body cultures ... | 1978 | 697169 |
| ultrastructure of some cutaneous sense organs in dermacentor marginatus nymphs. | the fine structure of the integumentary glands and mechanoreceptory setae in dermacentor marginatus nymphs is described. the integumentary gland is localized in the epidermal layer and secretory products pass through the duct lumen and two cuticular lips to the surface. ultrastructure of cuticular cavity represents triangular form with lateral folds. the mechanoreceptor setae are composed of glandular cells localized in the epidermal layer and cuticular setae movably articulated to the cuticle b ... | 1978 | 727555 |
| [contribution to study of ixodidae (acarina, ixodoidea) in cantabric mountains (spain) (author's transl)]. | five ixodidae species parasites of small mammals have been identified in north-western spain and particularly on the cantabrique mountains. the authors mention that among these species there are ixodes acuminatus (neumann, 1901) and ixodes trianguliceps (birula, 1895), which according to their own knowledge, have never been noticed in the iberian peninsula so far. | 1976 | 788615 |
| reaction of the host to the tick-bite. ii. distribution of tick borne encephalitis virus in sucking ticks. | no reactive histological changes of the dermis and no cement cone formation were observed at the insertion site of tick mouthparts by feeding of h. inermis larvae. conversely, cement formation was observed by feeding of h. inermis female. fully fed d. marginatus larvae on viraemic mice showed bright fluorescence in oesophagus, suboesophageal ganglion, salivary glands, a few gut cells and in lumen of malpighian tubuli. we consider the penetration of virus from oesophagus to suboesophageal ganglio ... | 1976 | 793256 |
| host-ectoparasite relationships. | | 1975 | 808617 |
| a review of rocky mountain spotted fever (tick-borne typhus), its agent, and its tick vectors in the united states. | | 1975 | 810584 |
| rocky mountain spotted fever (tick-borne typhus) in south carolina: an educational program and tick/rickettsial survey in 1973 and 1974. | because the incidence of spotted fever is increasing in south carolina, campaigns were carried out in 1973 and 1974 to provide the public and medical practitioners, through pamphlets and news media, with information about spotted fever and the ticks which transmit the causative agent, rickettsia rickettsii. people were also invited to save and submit live ticks removed from vegetation, animals and humans, for examination by the hemolymph test. a total of 1,186 ticks consisting of 987 dermacentor ... | 1975 | 811127 |
| rocky mountain spotted fever in mississippi: survey for spotted fever antibodies in dogs and for spotted fever group reckettsiae in dog ticks. | during epidemiologic studies of rocky mountain spotted fever in mississippi in 1973, dogs were surveyed for antibodies tp spotted fever group antigens and for tick parasites infected with rickettsiae of the spotted fever group. fifty-three (46%) of 116 serum samples had complement-fixing antibody titers greater than or equal to 1:8 as compared to only one (5%) of 21 samples from a group of dogs obtained from metropolitan chicage. fifty-two per cent of the dogs tested from mississippi had microag ... | 1976 | 814809 |
| mechanisms of transovarial infection of spotted fever rickettsiae in ticks. | | 1975 | 829476 |
| biochemical studies of tick embryogenesis. free amino acid pools during embryogenesis of dermacentor andersoni. | | 1977 | 830483 |
| evaluation of free-roaming mule deer as carriers of anaplasmosis in an area of idaho where bovine anaplasmosis is enzootic. | samples of blood from 87 rocky mountain mule deer (odocoileus hemionus hemionus) were inoculated into 3 susceptible splenectomized calves to determine the anaplasmosis carrier status of the deer. the deer were trapped along the idaho-utah state boundary, near stone, id. acute anaplasmosis was induced in 2 of the 3 inoculated calves, and blood from the 3 calves caused anaplasmosis when inoculated into adult non-splenectomized cattle. serum rapid card agglutination testing revealed 13 (14.9%) posi ... | 1977 | 833034 |
| the distribution in oregon of ixodes pacificus, dermacentor andersoni, and dermacentor occidentalis with a note on dermacentor variabilis (acarina: ixodidae). | | 1977 | 845890 |
| possibilities of persistence in new biotopes of ticks imported by birds. | survival and development of 6 tick species (hyalomma anatolicum, rhipicephalus sanguineus, haemaphysalis punctata, dermacentor marginatus, d. reticulatus and ixodes ricinus) were studied in 3 groups differing in the range of distribution with respect to the place of importation, as a model for the knowledge of their possible inclusion in the new local biocenosis during transportation by natural hosts. | 1977 | 852771 |
| dermacentor andersoni: culture of whole salivary glands. | | 1977 | 862699 |
| [electrophoretic study of the proteins of the hemolymph, intestine, excrement (and ova) of active and dispausal dermacentor marginatus sulz (ixodidae) females]. | the polyacrylamide-gel electrophoresis was used to separate the negative charged proteins from adult females of the tick dermacentor marginatus sulz. there were separated up to 25 protein bands from haemolymph and up to 19 bands from midgut extracts of the engorged females. the number of protein bands in excreta and eggs was 15 and 18 respectively. haemoproteins from haemolymph, midgut and eggs were different in their electrophoretic mobility. active and diapausing ticks showed essential differe ... | 1977 | 865869 |
| the influence of adrenergic agonists and their antagonists on isolated salivary glands of ixodid ticks. | various drugs elicit fluid secretion by isolated salivary glands of two species of ixodid ticks (dermacentor andersoni stiles and amblyomma hebraeum koch). among catecholamines, the following order of potency was observed: dopamine, epinine, noradrenaline = adrenaline and isoprenaline. the following drugs, in order of potency, were also agonists on this preparation: ergonovine, ergotamine, 6-hydroxydopamine, apomorphine, phenylephrine, norphenylephrine, beta-phenylethylamine, tyramine, d, l-dopa ... | 1977 | 891618 |
| [sensitivity of the females of ixodes persulcatus and dermacentor silvarum (ixodidae) to baytex and the possibility of their overcoming poisoning with this substance]. | females of i. persulcatus and d. silvarum are very sensitive to baytex, the value of ld50 for both species are similar. the development of injury after exposure to baytex proceeds very quickly and the subsequent stages of injury development correspond to those caused by ddt (uspensky and levikov, 1974). the overcoming of baytex poisoning during the sucking of the host's blood is possible only at the initial stage of the injury. the simulatneous feeding on the same rabbit of ticks treated with ba ... | 1977 | 896262 |
| [carotenoids in parasitic and free-living acarina]. | | 1977 | 898971 |
| [ectoparasites of the bison bonasus (l.) in the białowieza forest]. | | 1977 | 898994 |
| [new foci of dermacentor reticulatus (fabricius, 1794) in poland]. | | 1977 | 899012 |
| [survival time of dermacentor reticulatus (fabr.) (ixodidae) ticks infected per anum with tick-borne encephalitis virus (tbe)]. | | 1977 | 899013 |
| [dermacentor reticulatus (fabr.) (ixodidae) in laboratory culture]. | | 1977 | 899014 |
| [suitability of various selected media for tissue culture of hyalomma dromedarii koch and dermacentor (fabr.) (acarina, ixodides)]. | | 1977 | 899015 |
| changing patterns in the incidence of rocky mountain spotted fever on long island (1971-1976). | clinical data from 124 rocky mountain spotted fever (rmsf) cases submitted by long island physicians and hospitals were compiled for the six-year period 1971-1976. this information was subsequently compared to two parameters: first, the geographic distribution of human cases and rickettsia-infected dermacentor variabilis (say), and, secondly, the human population dynamics in long island towns since 1950. despite an overall decline in the rate of suburbanization and population growth, cases of rm ... | 1977 | 920726 |
| [suburban biotopes of rhipicephalus turanicus (pomerancev, matikasvili, lototzki, 1940). (acarina, ixodoidea). preliminary study (author's transl)]. | investigations carried out on the waste grounds of a certain number of large mediterranean towns in provence and languedoc (france) show the prevalence of rhipicephalus turanicus in such an environment. the authors analyse the conditions favourable to the installation of the species, and make a comparison between the suburban biotopes with rhipicephalus turanicus and the homologous biotopes with dermacentor reticulatus. | 1977 | 921194 |
| rickettsiae of the spotted fever isolated from dermacentor marginatus ticks in south germany. | rickettsiae of the spotted fever group were detected by haemocyte test in 8 (12%) of 51 partially engorged dermacentor marginatus females collected in march/april 1975 in south germany. four strains of rickettsiae were isolated from ticks positive in haemocyte test. it was concluded with isolated strain brd-1 and homologous immune guinea pig, hamster and mouse sera in cf cross reactions with antigens and immune sera against other members of the sf group, that the newly isolated strains are simil ... | 1977 | 930478 |
| new distribution record for dermacentor hunteri bishopp (acari: ixodidae). | | 1976 | 940133 |
| [ixodidae of the champagne-ardennes region. preliminary study]. | | 1976 | 948974 |
| [sublethal action and aftereffect of ddt on dermacentor silvarum 01. (acarina, ixodidae)]. | observations were conducted on the processes of feeding and oviposition in the females of dermacentor silvarum poisoned with ddt, the ancestors of which had been subjected to this acaricide and had overcome the poisoning due to the feeding. the rise in the sensitivity to ddt in the females of the second generation and a number of pathological changes both in feeding females and in their progeny were noted. | 1976 | 958715 |
| distribution of suspected tick vectors and reported cases of rocky mountain spotted fever in california. | evidence is presented for an area of human risk to rocky mountain spotted fever (rmsf) in california extending beyond the range of its classic tick vector, dermacentor andersoni. geographic, seasonal, and host distributions of dermacentor variabilis and dermacentor occidentalis suggest these species as potential vectors of rmsf in california outside the range of dermacentor andersoni. | 1976 | 961695 |
| biochemical and physiological studies of certain ticks (ixodoidea). absence of sterol biosynthesis in dermacentor andersoni stiles (acarina: ixodidae). | | 1976 | 978697 |
| [prevalence of the ticks dermacentor marginatus (sulzer, 1776) and dermacentor reticulatus (fabricius, 1794) and their importance as vectors of diseases in germany (author's transl)]. | from a systematical study of german ticks resulted the occurrence of two tick species of the genus dermacentor. d. marginatus is found to be widely spread in southern germany. adults of the tick feed mainly on sheep. d. reticulatus is first described from germany where the tick occurs endemic in a limited forest area on red deer. the two tick species are known from neighbouring countries of germany in transmitting virus, rickettsiae, bacteriae and protozoa but are not yet well studied in germany ... | 1976 | 1006797 |
| human babesiosis on nantucket island: transmission by nymphal ixodes ticks. | in order to identify potential vectors of human babesiosis (babesia microli) in southern massachusetts, i attempted to transmit the infection via nymphal ticks of that species found to be most abundant on reservoir hosts (peromyscus leucopus) in nature. mice were collected at frequent intervals throughout a year in a known enzootic focus on nantucket island, and ticks were removed by hand. ticks of only two species were present; larvae and nymphs of ixodes scapularis were about 10 times as numer ... | 1976 | 1008124 |
| first record of bacillary rickettsia-like organisms in european tick dermacentor marginatus (sulzer). | bacillary rickettsia-like organisms (brlo) were found in the tick dermacentor marginatus. they are gram-negative and differ from common bacteria and reckettsiae both in the cultivation conditions and morphology. brlo are non-pathogenic for ticks and guinea pigs. in our studies they were isolated on half-engorged females of d. marginatus, on which they are still maintained. | 1976 | 1017754 |
| the effect of presence of females on spermatogenesis and early mate seeking behavior in two species of dermacentor ticks (acari : ixodidae). | | 1976 | 1020634 |
| [tarsal gland of ixodid ticks (ixodidae)]. | in the tarsi of all legs of ixodes persulcatus, dermacentor daghestanicus, rhipicephalus turanicus and hyalomma asiaticum the multicellular gland was observed. the gland is formed by a single layer of glandular cells that form a central cavity where two ciliary structures in a cuticular (scolopoid) sheath are situated. a possible function of the gland is discussed in the article. | 1976 | 1026913 |
| [new faunal and biological observations on ticks in abruzzo]. | ticks collected during the years 1975-76 in abruzzo (prov. l'aquila and chieti) italy are reported. the following species have been identified: ixodes canisuga, ixodes frontalis, ixodes hexagonus, ixodes ricinus, dermacentor marginatus, haemaphysalis sulcata, rhipicephalus bursa, rhipicephalus sanguineus, hyalomma marginatum. new hosts are: felis catus for ixodes canisuga; scolopax rusticola, motacilla flava, corvus cornix for ixodes frontalis; sciurus vulgaris for haemaphysalis punctata; garrul ... | 1976 | 1032325 |
| failure of anaplasma marginale theiler to survive natural winter conditions on a dermacentor andersoni = (venustus) infested range. | | 1976 | 1078097 |
| ricettsioses studies. 2. natural foci of rickettsioses in east slovakia. | natural foci of q fever and of spotted fever group rickettsiae in the kosice district of east slovakia are described and discussed. it was established that the natural focus of q fever was a secondary one. cattle were observed to be the main source of human infection and a high proportion of synanthropic rodents was found to be infested with coxiella burnetii. the natural focus of spotted fever group rickettsiae was shown to be of a primary character, such rickettsiae circulating among ticks and ... | 1976 | 1085666 |
| study of rickettsioses in slovakia. i. coxiella burneti and rickettsiae of the spotted fever (sf) group in ticks and serological surveys in animals and humans in certain selected localities in the lucenec and v. krtís districts. | a study of the natural focus character of q fever and the rickettsiosis caused by organisms of the sf group carried out in 1971-1973 in 7 selected villages in the lucenec district and in a few control villages in the v. krtis district, produced the following results: among a total number of 2,200 ticks belonging to the species dermacentor marginatus, ixodes ricinus and haemaphysalis punctata and tested for the presence of rickettsial organisms by the haemocyte test, c. burneti was detected in 8 ... | 1975 | 1092754 |
| neurosecretory system of the american dog tick, dermacentor variabilis (acari: ixodidae). ii. distribution of secretory cell types, axonal pathways and putative neurohemal-neuroendocrine associations; comparative histological and anatomical implications. | histological observations using specialized techniques reveal neurosecretory cells in 18 centers throughout the rind (cortex) of the central nerve mass or synganglion of dermacentor variabilis. many cells contribute to complicated networks of neurosecretory pathways and tracts in pre- and post-esophageal portions of the synganglion. the four types of neurohemal-neuroendocrine associations found in dermacentor resemble structures found in soft ticks (argasidae) and in other arachnida, but are mor ... | 1975 | 1117459 |
| [technic of infecting ticks (ixodidae) per anum]. | | 1975 | 1121877 |
| parasites of black bears of the lake superior region. | parasites collected from free-ranging black bears, ursus americanus pallas, 1780, from northeastern minnesota or northern michigan include the dog tick, dermacentor variabilis (say, 1821), the winter tick, d. albipictus (packard, 1869), a louse, trichodectes pinguis euarctidoes hopkins, 1954, an ascarid worm, baylisascaris transfuga (rudolphi, 1819), a filarial worm, dirofilaria ursi yamaguti, 1941, taeniid tapeworms, and unidentified fleas. the broad fish tapeworm, diphyllobothrium latum (linna ... | 1975 | 1142551 |
| parasites of the black-tailed jackrabbit in north central colorado. | forty-four black-tailed jackrabbits, lepus californicus melanotis mearns, 1890, were collected near denver from august, 1972, through july, 1973, and amined for parasites. recovered parasites and their infection rates were: eimeria sp. 100%, cittotaenia sp.27%, coenuri of multiceps sp. 57%, cediopsylla inaequalis 14%, hoplopsyllus affinis 9%, haemodipsus setoni 2%, dermacentor andersoni 14%, and haemaphysalis leporis-palustris 25%. | 1975 | 1142561 |
| absence of anaplasma marginale infection in american bison raised in an anaplasmosis endemic area. | blood was collected at slaughter from 132 adult american bison (bison bison) raised in an anaplasmosis endemic area where the vector dermacentor andersoni (equals venustus) is indigenous. hematologic studies revealed no indication of clinical anaplasmosis. card agglutination and complement-fixation tests on all bison serums were negative. eleven anaplasmosis-susceptible calves each inoculated with 204 ml of blood pooled from 12 bison did not develop anaplasmosis. results of this study indicate a ... | 1975 | 1152178 |
| evaluation of co2-baited traps for survey of amblyomma maculatum koch and dermacentor variabilis say (acarina: ixodidae). | | 1975 | 1159725 |
| the regulation of adult american dog tick, dermacentor variabilis say, seasonal activity and breeding potential (ixodidae: acarina). | | 1975 | 1179959 |