Search Results
Results 1151 - 1200 of 4239

Current sort is by relevancy. Click to sort by publication date

< 19 20 21 22 23 24 25 26 27 28 29 >
Zeme R - - 2002
Sexual attractiveness of unengorged, semiengorged and fully engorged females of both field and laboratory populations of Ixodes ricinus was studied under laboratory conditions by means of a computerised video tracking system. A male and a female were allowed to walk freely in a glass arena during 1 h and their ...
Relevancy Score: Relevancy Score: 368
Guglielmone A A - - 1991
In four provinces of north-western Argentina (Catamarca, Jujuy, Salta and Tucumán), between March 1976 and March 1990, 514 ticks were found on humans. They were identified as Rhipicephalus sanguineus group (1 male), Boophilus microplus (6 male, 1 female), Amblyomma parvum (9 male, 13 female), A. cajannense (35 male, 30 female, ...
Relevancy Score: Relevancy Score: 368
Dantas-Torres Filipe - - 2006
The objective of this paper is to describe four cases of human parasitism by Rhipicephalus sanguineus (Latrielle) in Brazil. During an investigation regarding the species of ectoparasites of domestic dogs from the metropolitan region of Recife, Pernambuco state, four dog owners were found to be parasitized by ticks. The ticks ...
Relevancy Score: Relevancy Score: 368
Nowak-Chmura Magdalena - - 2011
During the ornithological "Operation Baltic" on the Hel Peninsula (the Baltic Sea coast in Poland) the first case of transfer to Poland of ticks of the species Ixodes eldaricus Djaparidze, 1950, on Prunella modularis (one female tick) and Erithacus rubecula (two males and one female tick). P. modularis and E. ...
Relevancy Score: Relevancy Score: 368
Harlan H J - - 1990
Fifteen micrometeorologic or microenvironmental parameters, including temperature, moisture, wind, and solar radiation, were repeatedly measured at 1 m and 2.5 cm aboveground, in the litter layer, and in the soil concurrently with drag samples of questing American dog tick, Dermacentor variabilis (Say), in five plots (1 by 10 m) in ...
Relevancy Score: Relevancy Score: 368
Fourie L J - - 1995
Hyalomma ticks were collected from Merino and black-headed Dorper sheep and their attachment preferences determined. The preferred site of attachment for Hyalomma marginatum rufipes on both Dorper and Merino sheep was the anogenital and inguinal areas (75-76%). On Dorper sheep, H. truncatum attached predominantly to the anogenital and inguinal areas ...
Relevancy Score: Relevancy Score: 368
Kariuki Edward K - - 2012
Several ixodid tick species are shared between domestic cattle and African buffaloes (Syncerus caffer). So too, are a number of tick-borne diseases. The aim of the study was to compare the species composition of ticks that infest cattle and buffaloes utilising the same habitat within the Tsavo Conservation Area, Kenya. ...
Relevancy Score: Relevancy Score: 368
Sanches Gustavo S - - 2012
Oocyte maturation in the thelytokous parthenogenetic tick Amblyomma rotundatum was examined for the first time using light and scanning electron microscopy. The panoistic ovary lacks nurse and follicular cells and is a single continuous tubular structure forming a lumen delimited by the ovarian wall. Oocytes of tick species are usually ...
Relevancy Score: Relevancy Score: 368
Apanaskevich Dmitry A - - 2013
Abstract A new tick species belonging to the African subgenus Afrixodes Morel, 1966 of the genus Ixodes Latreille, 1795, namely Ixodes (Afrixodes) microgalei n. sp. is described. Females of this species are most similar to those of I. colasbelcouri Arthur, 1957 and I. nesomys Uilenberg & Hoogstraal, 1969. The female ...
Relevancy Score: Relevancy Score: 368
McNemee Richard B RB - - 2003
In May 2000, a dead porcupine (Erethizon dorsatum Culiver) was found on an infrequently traveled dirt road at Camp Ripley, MN. The presence of late instar Calliphoridae suggested that the porcupine died within the past 4 to 7 d. Adult carrion (Silphidae) and rove (Staphylinidae) beetles were observed under the ...
Relevancy Score: Relevancy Score: 368
Oliver J H JH - - 1987
Amblyomma americanum males were treated with 0.5, 1, 2, 3, 4, 8, and 16 krad of gamma radiation. Testes of ticks treated with 2, 3, 4, 8, and 16 krad were smaller than those of ticks irradiated at lower levels and controls. No recognizable alteration in timing of spermatogenesis was ...
Relevancy Score: Relevancy Score: 368
Meléndez R D - - 1998
Boophilus microplus infestation is one of the most serious limitations to cattle industry in tropical regions, even though bovines show natural resistance to ticks. This resistance was evaluated in Cross-bred Carora Bulls (CCB) a tropicalized dairy breed from Venezuela. Seven CCB were experimentally infested with B. microplus larvae, "Mozo" strain, ...
Relevancy Score: Relevancy Score: 368
Farid H A - - 1996
Rhipicephalus sanguineus sensu stricto is the taxonomic baseline for the R. sanguineus group of ticks which consists of four species in Egypt. Because of the potential confusion in the differentiation of species within the group, particularly in the Middle East, there is an urgent need for the development of new ...
Relevancy Score: Relevancy Score: 368
Terenius O - - 2000
Ticks were collected from pastures and domestic and wild vertebrates during the rainy seasons of 1994 and 1996 in Guinea-Bissau. We collected the following species: from pastures Rhipicephalus lunulatus Neumann, R. muhsamae Morel & Vassiliades, R. senegalensis Koch, and R. sulcatus Neumann; from reptiles Amblyomma nuttalli Dönitz and Aponomma flavomaculatum ...
Relevancy Score: Relevancy Score: 368
Sattler P W - - 1986
Four natural populations and 4 laboratory colonies of Boophilus microplus (Canestrini) and a laboratory colony of Boophilus annulatus (Say) were subjected to electrophoretic analysis to determine levels of genetic similarity and genetic variability. Populations of B. microplus exhibited high genetic similarity (I = 0.984 +/- 0.012) indicating that all populations ...
Relevancy Score: Relevancy Score: 368
Barros-Battesti D M - - 2000
Oviposition and eclosion periods for Ixodes didelphidis were observed under two temperatures (25 degrees C and 27 degrees C) and 90-95% humidity. Although there was a significant increase in the eclosion period (p<0.05) and a tendency to increase the oviposition period at 25 degrees C, there was neither significant differences ...
Relevancy Score: Relevancy Score: 368
Rudakova S A - - 2005
A study of possible transovarial and transphase transmission of borreliae by the tick Dermacentor reticulatus is carried out. The possibility of borreliae transmission by the ticks of this species being infected spontaneously as well as experimentally is shown in principle. Although borreliae are preserved in the organism of D. reticulatus, ...
Relevancy Score: Relevancy Score: 368
Horak I G - - 2001
The collection of the immature stages of Dermacentor rhinocerinus from host animals is described for the first time. These are the bushveld gerbil (Tatera leucogaster, from which larvae and nymphs were collected, the red veld rat (Aethomys crysophilus), from which a larva was collected, and the Natal multimammate rat (Mastomys ...
Relevancy Score: Relevancy Score: 368
Levin M - - 1997
The intensity of Borrelia burgdorferi transmission in nature is dependent upon the efficiency of acquisition of spirochetes by larval Ixodes scapularis Say (= I. dammini Spielman, Clifford, Piesman & Corwin). White-footed mice infected with B. burgdorferi were infested weekly for 5 consecutive weeks with 25 or 250 larval I. scapularis. ...
Relevancy Score: Relevancy Score: 368
Arnosti André - - 2011
This study showed the interference of esters extracted from Ricinus communis in the secretory cycle of salivary glands of Rhipicephalus sanguineus ticks, which consequently caused collateral effects on their feeding process. Ticks attached on hosts which were fed with commercial feed containing different concentrations of R. communis oil esters suffered ...
Relevancy Score: Relevancy Score: 368
Chacon Samuel C - - 2004
The host relationships for most species of the genus Amblyomma are poorly known in Brazil. The ability of A. pseudoconcolor and A. cooperi to successfully feed on horses was investigated during ongoing research on the life cycle of these two species, which are primarily associated with wildlife. Results of these ...
Relevancy Score: Relevancy Score: 368
Coipan Elena Claudia - - 2011
In this study 1,868 questing Ixodes ricinus ticks (nymphs and adults), collected in six sites from three counties-Giurgiu, Sibiu, and Tulcea-in Romania, were examined by polymerase chain reaction (PCR) followed by reverse line blot (RLB) for detection of Borrelia burgdorferi sensu lato presence. The bacteria were found in 18% of ...
Relevancy Score: Relevancy Score: 368
Norval R A - - 1996
Infestations of adults and nymphs of Amblyomma hebraeum were counted on Brahman (Br), Brahman x Simmental (BS), Sanga (Sa) and Hereford (He) steers exposed to infested pastures at Mbizi in southern Zimbabwe in 1986-1987. Herefords were always the most heavily infested, while the Sanga tended to carry the fewest ticks ...
Relevancy Score: Relevancy Score: 368
Literak Ivan - - 2007
In winter months during 2003-2006, wild birds were captured and examined for ticks and chiggers at two sites near Brno, Czech Republic. In total, 1,362 birds, mostly passerines, were examined. The tick Ixodes arboricola Schulze et Schlottke, 1929 was found on 47 (3%) birds of six species. Ixodes ricinus Linnaeus, ...
Relevancy Score: Relevancy Score: 368
Barnard D R - - 1989
The location of Zebu, British, and Zebu x British cattle in tick-infested plots from March through September 1986 was compared with the location of Amblyomma americanum L. in the same plots. In April, May, and June, Zebu cattle spent less time (9.3-19.4%) in tick-infested quadrats than British (44.4-63.9%) or Zebu-British ...
Relevancy Score: Relevancy Score: 368
Lubelczyk C - - 2010
In July 2008, owners of seasonal camps in Vermont and Maine were exposed to large numbers of questing ticks after opening their camps for the season. Examination of collected specimens revealed that the camp in Vermont was infested with Ixodes cookei Packard, and the camp in Maine was infested with ...
Relevancy Score: Relevancy Score: 368
Labruna M B - - 2000
A survey of 124 dogs for ticks was conducted from August to November 1998 in 68 small farms of Uruará municipality in Eastern Amazon-Brazil. We collected 55 ticks from 18 dogs (14.5%). Amblyomma oblongoguttatum Koch, Amblyomma ovale Koch, and Amblyomma cajennense (F.) were found on nine, six, and one dog, ...
Relevancy Score: Relevancy Score: 368
Kubasu S S - - 2007
Differences in biological parameters of Rhipicephalus appendiculatus Neumann, the brown ear tick, were investigated. They included engorgement weight of larvae, nymphs and females, fecundity, size of unfed females and mean larval and nymphal duration post-repletion on rabbits to completion of the moult. Ticks were collected from four geographically isolated zones ...
Relevancy Score: Relevancy Score: 368
Wüest J - - 1978
Spermatids and spermatozoa of Amblyomma hebraeum were examined by scanning and transmission electron microscopy as well as by freeze-etch and freeze-fracture techniques. The external surface of the spermatid is smooth except for a rim of two parallel grooves near the anterior apex. This rim probably marks the level at which ...
Relevancy Score: Relevancy Score: 368
Fielden L J - - 1992
A comparative study was made of the life cycle of the tortoise tick, Amblyomma marmoreum Koch, on tortoises and guinea pigs under laboratory conditions. At 25 degrees C and 85% RH with natural day length, duration of off-host stages (preoviposition, oviposition, incubation, and premolt) was similar for ticks fed on ...
Relevancy Score: Relevancy Score: 368
Keirans J E - - 1998
A dichotomous identification key, with important characters illustrated by scanning electron micrographs, is provided for nymphs of the 9 species of the genus Amblyomma occurring in the United States. Species included are A. americanum (L.), A. cajennense (F.), A. dissimile Koch, A. imitator Kohls, A. inornatum (Banks), A. longirostre (Koch), ...
Relevancy Score: Relevancy Score: 368
Hilburn L R - - 1986
Nine populations of Amblyomma americanum (L.) were examined electrophoretically for variation of 21 enzymes. Only three enzymes were not polymorphic and the average heterozygosity per individual (h) for the species was 0.085 with a range of 0.077 to 0.110, comparing well with values in other arthropods. The average Nei identity ...
Relevancy Score: Relevancy Score: 368
Rechav Y - - 1977
The preoviposition period of the tick Rhipicephalus evertsi Neumann maintained under laboratory conditions at 26 C was 6.1 +/- 0.38 days. The average number of eggs produced during the oviposition period was 10,400 +/- 397 (max. 13.307, min. 7,558). The greatest daily egg production was recorded on the 3rd day ...
Relevancy Score: Relevancy Score: 368
Carroll J F - - 1996
Silt fence barriers were set along pasture fencelines and evaluated as a method of restricting the dispersal of blacklegged tick, Ixodes scapularis Say, adults and nymphs from woodlands into adjacent horse pastures. The barriers received no acaricidal treatment for the 1st cohort of adults. Thereafter the woods side of the ...
Relevancy Score: Relevancy Score: 368
Norval R A - - 1988
Adult Amblyomma hebraeum ticks were exposed at 14-day intervals on five sheep on 46 occasions and on three cattle on 15 occasions to determine the effects of repeated feeding. The engorged weight and percentage of ticks which fed successfully on sheep declined significantly at first but subsequently they increased. On ...
Relevancy Score: Relevancy Score: 368
Norval R A - - 1975
In the Eastern Cape Province of South Africa, larvae and nymphs of Ablyomma marmoreum Koch occur in habitats in which there is tree cover and herbaceous ground cover. Immatures of A. marmoreum are parasitic on reptiles, birds, and mammals. Adults occur only on reptiles. The major host for all stages ...
Relevancy Score: Relevancy Score: 368
Knight M M - - 1978
The life cycle of Hyalomma marginatum rufipes Koch was studied under laboratory conditions at 26 +/- 1 C. The preoviposition period was 7.1 +/- 0.23 days. The mean (+/- SE) number of eggs was 6,867 +/- 2,609 (max. 13,180, min. 3,184). The greatest egg production was recorded on day 3 ...
Relevancy Score: Relevancy Score: 368
Chemini C - - 1997
The most important tick-deer system potentially supporting the epidemiology of Lyme disease in the Italian Alps is that regarding Ixodes ricinus (L.) and roe deer (Capreolus capreolus L.). In this study, the pattern of tick infestation on 562 male roe deer harvested in September 1994 in 56 game districts of ...
Relevancy Score: Relevancy Score: 368
Mather T N - - 1996
Zoonotic prevalence of Babesia microti Franca piroplasms infecting white-footed mice, Peromyscus leucopus Rafinesque, was determined at 34 sites in Rhode Island where nymphal blacklegged tick, Ixodes scapularis Say, densities ranged from low to hyperabundant (1.7-525.3 nymphs per hour of flagging). Babesia was only detected at sites where tick abundance was ...
Relevancy Score: Relevancy Score: 368
Nava S - - 2009
The seasonality of immature stages of Amblyomma tigrinum was studied in an area of the Chaco phytogeographical province in Córdoba, Argentina by monthly collection of larvae from ground feeding birds and Sigmodontinae rodents, and nymphs from Caviidae rodents from May 2005 to April 2007. An apparent peak of abundance was ...
Relevancy Score: Relevancy Score: 368
Rudolf Ivo - - 2005
A total of 350 nymphs of the common tick Ixodes ricinus (Linnaeus, 1758) were collected in an endemic focus of Lyme borreliosis (South Moravia, Czech Republic) and examined for the presence of the protozoan Babesia microti (França, 1909) by polymerase chain reaction (PCR), using primers specific for the B. microti ...
Relevancy Score: Relevancy Score: 368
Wilson M L - - 1993
The survival of unfed adult Hyalomma truncatum Koch held under different regimes of constant temperature (5, 17, 24, and 30 degrees C) and relative humidity (10, 50, and 80%) was monitored during > 1 yr. Longevity of this medically important African tick was shortest at the highest temperature and lowest ...
Relevancy Score: Relevancy Score: 368
Hilburn L R - - 1992
The closely related cattle ticks, Boophilus microplus (Canestrini) and B. annulatus (Say), were tested for possible assortative mating under conditions designed to mimic those in the field. Patterns in the numbers of the four possible types of matings were generally indicative of a preference for conspecific mates in both species. ...
Relevancy Score: Relevancy Score: 368
Keirans J E - - 1996
Nymphal and larval stages of Ixodes (Ixodes) jellisoni Cooley & Kohls and I. (I.) neotomae Cooley are described for the first time. These 2 tick species occur only in the western United States, predominantly in California. The primary host for I. jellisoni is the California kangaroo rat, Dipodomys californicus (Merriam); ...
Relevancy Score: Relevancy Score: 368
Mannelli A - - 1997
Infestation of small rodents by ixodid ticks and frequency of host-seeking ticks collected by dragging were studied at Orecchiella Natural Park (Northern Apennines) in 1994 and 1995. Levels of infestation of Apodemus spp. by immature Dermacentor marginatus were higher in beech wood (5.1 larvae and 1.3 nymphs per mouse) than ...
Relevancy Score: Relevancy Score: 368
Rechav Y - - 1995
A survey of Amblyomma marmoreum Koch ticks recorded from the leopard tortoise, Geochelone paradalis Bell, in the National Zoological Gardens, Pretoria, South Africa, was carried out over a 19-mo period. No significant differences were found between the tick burdens on male and female tortoises. A. marmoreum showed a clear seasonal ...
Relevancy Score: Relevancy Score: 368
Carroll J F - - 1999
In laboratory bioassays under conditions of high humidity, host-seeking female black-legged ticks, Ixodes scapularis Say, avoided urine of reproductively active male and nonestrous female white-tailed deer, Odocoileus virginianus (Zimmermann), the principal host species of the adult stage. At 50% RH, female I. scapularis did not avoid urine from male and ...
Relevancy Score: Relevancy Score: 368
Cetin Huseyin - - 2009
The acaricidal effects of the volatile essential oil Origanum minutiflorum O. Schwarz & P.H. Davis (Lamiaceae) against adult Rhipicephalus turanicus was evaluated at a variety of concentrations and exposure times. Generally tick mortality increased with concentration and exposure. Ticks exposed to vapors from cotton wicks containing at least 10mul/L resulted ...
Relevancy Score: Relevancy Score: 368
VAN Es R P - - 1999
Intensive observations of the questing activity of Ixodes ricinus ticks in the field were made to provide data on the range of durations of periods of continuous questing activity, and of the variation in questing activity between individuals. Continuous periods of questing were observed to extend to a maximum of ...
Relevancy Score: Relevancy Score: 368
Garris G I GI USDA, Agricultural Research Service, Lone Star Tick Research Laboratory Poteau, OK - - 1989
A cooperative effort between the United States Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, the Agricultural Research Service, and the Department of Agriculture, Commonwealth Government of Puerto Rico has been successful in eradicating Amblyomma variegatum (Fabricius) from the islands of Puerto Rico and Vieques (an island ...
Relevancy Score: Relevancy Score: 368
< 19 20 21 22 23 24 25 26 27 28 29 >