| arsenic resistance in species of multi-host ticks in the republic of south africa and swaziland. | a survey was made in the republic of south africa and swaziland to determine the incidence of arsenic resistance in multi-host ixodid ticks. arsenic resistant strains were found in the following species:- rihipicephalus appendiculatus, rhipicephalus evertsi, rhipicephalus capensis, amblyomma hebraeum and a species of hyalomma, tentatively identified as hyalomma rufipes. strains of haemaphysalis leachi, haemaphysalis silacea and ixodes pilosus were also tested. | 1975 | 1223285 |
| some aspects of the life cycle of the tick ixodes pilosus under laboratory conditions. | some aspects of the life cycle of the tick ixodes pilosus were studied under laboratory conditions. the preoviposition period was 7,2 +/- 0,6 d. maximum egg production was on day 4 after oviposition commenced, with total egg production of 2,395 +/- 128,7 eggs per female. the mean feeding time of larvae was 3,3 +/- 0,1 d. the life cycle could not be completed due to the specific requirements of this species. | 1991 | 2051441 |
| parasites of domestic and wild animals in south africa. xxii. ixodid ticks on domestic dogs and on wild carnivores. | ixodid ticks were collected from 4 dogs on smallholdings near grahamstown, eastern cape province, on 1 or more occasions each week for periods ranging from 9-36 months. fourteen tick species were recovered and the seasonal abundance of adult haemaphysalis leachi and adult rhipicephalus simus was determined. complete collections of ticks were made from 50 caracals (felis caracal) in the cradock, graaff-reinet and southwell regions in the eastern cape province. the animals from cradock and graaff- ... | 1987 | 3444612 |
| parasites of domestic and wild animals in south africa. xxi. arthropod parasites of vaal ribbok, bontebok and scrub hares in the western cape province. | vaal ribbok (pelea capreolus), bontebok (damaliscus dorcas dorcas) and scrub hares (lepus saxatilis) were slaughtered in the bontebok national park at regular intervals and examined for arthropod parasites. twelve species of ixodid ticks were recovered; the antelope each harboured 9 species and the hares 11. rhipicephalus nitens was the most prevalent and most abundant tick. the vaal ribbok also harboured large numbers of ixodes pilosus and the bontebok fairly large numbers of rhipicephalus glab ... | 1986 | 3796942 |
| [apropos of the larvae of ixodes pilosus and i. rubicundus]. | | 1967 | 6076197 |
| the numbers of bush ticks, haemaphysalis longicornis, parasitic on grazing cattle before and after the acquisition of host resistance. | the numbers of bush ticks, haemaphysalis longicornis, on bos taurus steers in south east queensland was recorded regularly from july 1971 until january 1974. the steers had no prior exposure to the tick. the parasitic tick population was large during the first year, but declined to low levels in the second and third years, apparently as a result of the steers acquiring resistance to tick feeding. | 1983 | 6681952 |
| control of the bush tick (haemaphysalis longicornis) with zebu x european cattle. | brahman x hereford cattle carried only one-quarter as many engorging adult bush ticks (haemaphysalis (kaiseriana) longicornis) as hereford. simmental x hereford or friesian x hereford cattle when grazed together on the north coast of new south wales. fourteen percent of a brahman x hereford herd carried half of the engorging ticks suggesting that infestation levels would be further reduced by culling procedures. the results indicate an additional advantage to those already established for brahma ... | 1981 | 7259646 |
| phylogeny of ticks (ixodida) inferred from nuclear ribosomal dna. | phylogenetic relationships of 9 species of ticks were inferred from nucleotide sequences of the d1 domain of large subunit ribosomal dna (rdna), the v4 region of small subunit rdna and sequences immediately adjacent to these regions. six of the 7 subfamilies in the argasidae and ixodidae were represented: ornithodorinae and argasinae from the argasidae (soft ticks); and ixodinae, amblyomminae, haemaphysalinae and rhipicephalinae from the ixodidae (hard ticks). a mite, phytoseiulus persimilis, fr ... | 1996 | 8818731 |
| [meningo-encephalomyeloradiculitis in sunhordland. endemic virus-caused disease transmitted by a bush tick?]. | | 1962 | 13872816 |
| estimation of the density of nymphs of the bush tick, haemaphysalis longicornis (acari: ixodidae), by the catch effort method. | the density of nymphs of the bush tick, haemaphysalis longicornis, was investigated by the catch effort method with flagging. the spatial distribution of h. longicornis nymphs fit the model of contagiously distributed colonies by iwao's m*-m analysis (iwao 1968). a sequential sampling method was used to predict the theoretical point at which to stop sampling. our analysis showed that five quadrats (4 m x 4 m) were sufficient to estimate the density of h. longicornis nymphs with a mean density of ... | 2004 | 15139273 |
| questing height of nymphs of the bush tick, haemaphysalis longicornis, and its closely related species, h. mageshimaensis: correlation with body size of the host. | the questing height (i.e. ambush height) of ticks on a plant plays an important role in host selection. to test the hypothesis that the questing height of ticks in a locality had adapted to the body size of the host in that locality, we examined the questing height of nymphs of the ticks, haemaphysalis longicornis and h. mageshimaensis, at 7 locations in japan. sika deer, cervus nippon, is the primary host of these ticks and there is considerable geographical variation in the body size of sika d ... | 2004 | 15180318 |
| ticks associated with the three largest wild ruminant species in southern africa. | the objective of this study was to assess the host status of the three largest southern african wild ruminants, namely giraffes, giraffa camelopardalis, african buffaloes, syncerus caffer, and eland, taurotragus oryx for ixodid ticks. to this end recently acquired unpublished data are added here to already published findings on the tick burdens of these animals, and the total numbers and species of ticks recorded on 12 giraffes, 18 buffaloes and 36 eland are summarized and discussed. twenty-eigh ... | 2007 | 17933365 |
| influence of aggregation and relative humidity on longevity of unfed bush tick, haemaphysalis longicornis neumann (acari: ixodidae). | the survival of all stages of haemaphysalis longicornis was investigated at different densities and at 3 levels of relative humidity. larvae survived longer when the density was higher, or the size of a cluster was larger, or both. however, in nymphs and adults, there was no significant relationship between the density and the survival period. moreover, in nymphs and adults, there was no positive relationship between the size of the aggregation and tick longevity, except for 2 nymphs/vial in hig ... | 2008 | 18576812 |
| a new species of ixodes (acari: ixodidae) from south african mammals. | abstract a new tick species belonging to the african subgenus afrixodes morel, 1966, namely, ixodes ( afrixodes ) fynbosensis n. sp., is described. the female of i. fynbosensis is easily differentiated from the other african ixodes species by a large, tapering triangular ventrolateral spur on palpal segment i. nymph and larva of i. fynbosensis can be distinguished from those of other members of afrixodes by a combination of the following characters: pointed hypostome, long auriculae, long and ac ... | 2010 | 21506796 |
| history and development of research on wildlife parasites in southern africa, with emphasis on terrestrial mammals, especially ungulates. | the history of wildlife parasitology in south africa, and to some extent southern africa, is reviewed, giving a brief overview of the early years and following its development from the founding of the onderstepoort veterinary institute in 1908 until the turn of the century. an emphasis is placed on game species. the main findings on protozoan parasites, including those of carnivores, are presented, starting in the 1890s and leading up to the first decade of the 21st century. important developmen ... | 2014 | 25830101 |
| the tick-derived anticoagulant madanin is processed by thrombin and factor xa. | the cysteine-less peptidic anticoagulants madanin-1 and madanin-2 from the bush tick haemaphysalis longicornis are the founding members of the merops inhibitor family i53. it has been previously suggested that madanins exert their functional activity by competing with physiological substrates for binding to the positively charged exosite i (fibrinogen-binding exosite) of α-thrombin. we hereby demonstrate that competitive inhibition of α-thrombin by madanin-1 or madanin-2 involves binding to the ... | 2013 | 23951260 |
| efficacy of an imidacloprid/flumethrin collar against fleas and ticks on cats. | the objectives of the studies listed here were to ascertain the therapeutic and sustained efficacy of 10% imidacloprid (w/w) and 4.5% flumethrin (w/w) incorporated in a slow-release matrix collar, against laboratory-infestations of fleas and ticks on cats. efficacy was evaluated against the flea ctenocephalides felis felis, and the ticks ixodes ricinus, amblyomma americanum and rhipicephalus turanicus. the number of studies was so large that only a general overview can be presented in this abstr ... | 2012 | 22541037 |
| cold hardiness and biochemical response to low temperature of the unfed bush tick haemaphysalis longicornis (acari: ixodidae). | the survival of overwintering ticks, is critical for their subsequent population dynamics in the spring, and consequent transmission of tick-borne diseases. survival is largely influenced by the severity of the winter temperatures and their degree of cold hardiness at the overwintering stage. the bush tick haemaphysalis longicornis, is widely distributed in china, and can transmit various pathogens that pose serious medical/veterinary problems. in the present study we investigated the effect of ... | 2014 | 25064082 |
| ticks of australia. the species that infest domestic animals and humans. | the book australian ticks by f.h.s. roberts (1970) is a land-mark in australian tick biology. but it is time for a new and improved book on the ticks of australia. the present book has identification guides and accounts of the biology and diseases associated with the 16 species of ticks that may feed on domestic animals and humans in australia. these comprise five argasid (soft) ticks: argas persicus (poultry tick), argas robertsi (robert's bird tick), ornithodoros capensis (seabird soft tick), ... | 2014 | 24943801 |
| purification of vitellin and dynamics of vitellogenesis in the parthenogenetic tick haemaphysalis longicornis (acari: ixodidae). | vitellin (vt) was purified from eggs of parthenogenetic bush tick haemaphysalis longicornis by gel filtration and ion exchange chromatography. our results revealed that only one single vt existed in parthenogenetic bush tick, and the purified vt was proved to be a hemoglycolipoprotein consisting of nine polypeptides with molecular weights of 203, 147, 126, 82, 74, 70, 61, 47 and 31 kda, respectively. polyclonal antibody and monoclonal antibody against vt were produced using the purified vt. the ... | 2015 | 25524510 |