Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| prevalence of parasitism by amblyomma americanum on wild turkey poults as influenced by prescribed burning. | captive-raised eastern wild turkey (meleagris gallopavo silvestris) poults were allowed to forage on either recently burned plots or on plots that had not been burned during the previous 3 years. following a two hour exposure on the study plots, external parasites were recovered from all poults. the louse (menacanthus stramineus) and the lone star tick (amblyomma americanum) were the only parasites recovered. fifty-nine poults exposed to the burned plots had a significantly (p less than 0.001) l ... | 1979 | 459047 |
| parasites of domestic and wild animals in south africa. xiii. the seasonal incidence of adult ticks (acarina: ixodidae) on cattle in the northern transvaal. | ticks were collected over a period of 13 months, at approximately fortnightly intervals, from 6 africaner oxen kept on the farm nylsvley in the naboomspruit district. the 8 species of ixodidae collected were, in order of abundance, rhipicephalus appendiculatus, r. evertsi evertsi, hyalomma marginatum rufipes, h. truncatum, amblyomma hebraeum, r. simus, boophilus decoloratus and ixodes cavipalpus. the relative abundance of adult ticks of these species, their predilection feeding sites and seasona ... | 1979 | 460821 |
| a bioassay method for the pheromone(s) of the bont tick amblyomma hebraeum koch. | a bioassay was developed which enabled the detection of the pheromones of the bont tick (amblyomma hebraeum koch) within 2 hours with a reproducibility of 82 +/- 13%. dried, solvent-extracted ticks were glued onto the shaved backs of rabbits. those ticks to which pheromone extract was subsequently applied strongly attracted females of the same species. in a 2-way choice test a cork disc impregnated with pheromone extract was even more attractive to female ticks than a treated dried tick. | 1979 | 460823 |
| localized tick bite reaction. | a woman presented with a localized tick bite reaction. the tick (amblyomma americanum, the "lone star" tick) was still attached to the erythematous, indurated skin of the upper back. after several unsuccessful attempts at removal, a punch biopsy was performed, and the resultant histologic sections incorporated both tick and involved skin. the various systemic and localized tick bite reactions are discussed, as are the diagnostic dilemmas which may arise when the organism is no longer present. pu ... | 1979 | 477386 |
| comparisons of the foveae dorsales in male and female ixodid ticks amblyomma americanum, a. maculatum, dermacentor andersoni and d. variabilis (acari: ixodidae). | 1979 | 537001 | |
| genetic basis for organochlorine resistance in amblyomma variegatum and information on the susceptibility on a. lepidum to organochlorine acaricides. | 1979 | 544643 | |
| tick infestations and tick-borne diseases in zimbabwe rhodesia. | the distribution of tick species in zimbabwe rhodesia is significantly influenced by land utilization practices. the most commonly occurring species in the over-grazed tribal areas is boophilus decoloratus. by contrast, well-managed commercial farms and ranches support a wide range of tick species, the most important of which is rhipicephalus appendiculatus. until recently tick-borne diseases of cattle were efficiently controlled through dipping. the low incidence of disease was an important fac ... | 1979 | 553966 |
| the relationship of phosphodiesterase and cyclic amp to the process of fluid secretion in the salivary glands of the ixodid tick amblyomma americanum. | phosphodiesterase (pde) activity in the salivary glands of the female. amblyomma americanum decreased as the tick progressed from a slow to a rapid phase of feeding, while the rate of fluid secretion increased when glands were stimulated with cyclic amp and theophylline. dopamine stimulated pde activity and an 'inhibitory' factor was found in glands obtained from rapidly engorging ticks which decreased pde activity. these findings are discussed as they relate to the process of fluid secretion by ... | 1978 | 212286 |
| crimean-congo hemorrhagic fever, thogoto, dugbe, and jos viruses isolated from ixodid ticks in ethiopia. | from 1974 through 1976, u.s. naval medical research unit no. 5 isolated 25 strain of tick-borne virus in infant mice from 410 pools containing over 6,000 ticks, and one strain from a bird and one strain from a rodent collected in central and southern ethiopia. of these, 17 were identified as known viruses previously found in west central and east africa. there were 8 strains of jos virus from amblyomma ticks; 7 strains of dugbe virus from a bird, a rodent and from ticks; 1 strains of crimean-con ... | 1978 | 98066 |
| 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 |
| field trials with pheromone-acaricide mixtures for control of amblyomma bebraeum. | 1978 | 627671 | |
| effects of gulf coast ticks on blood composition and weights of pastured hereford steers. | studies conducted in 1975 and 1976 were made of lightweight herefored steers, pastured on native grass pasture and infested with gulf coast ticks, amblyomma maculatum koch. the effects of tick infestations on the blood composition and weights of steers over an 8-week period were measured each year and compared to tick-free animals maintained similarly. by the end of the 8-week study infested animals averaged 8.21 kg less than control animals in 1975 and 12.42 kg less in 1976. of the blood parame ... | 1978 | 641677 |
| morphology of the spermatid and spermatozoon of amblyomma hebraeum koch (acarina; ixodidae). | 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 a cap detaches, permitting extrusion of the inner cord during spermatozoon maturation. both ends of the spermatid are closed, the anterior part being slightly thicker than th ... | 1978 | 654427 |
| actions of some transmitters and their antagonists on salivary secretion in a tick. | cholinomimetics (pilocarpine, carbachol, physostigmine, acetylcholine, acetyl-beta-methylcholine) and sympathomimetics (dopamine, epinephrine), when injected into the hemolymph, provoked salivary fluid secretion in the female ixodid tick amblyomma hebraeum koch. atropine, but not tubocurarine or toxiferine, abolished pilocarpine-induced secretion without reducing the response to dopamine. reserpine and guanethidine likewise selectively attenuated pilocarpine-induced secretion. following extirpat ... | 1978 | 677342 |
| 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 |
| the activity of insect juvenile hormone mimics in larval amblyomma hebraeum koch (acarina: metastriata: ixodidae). | a total of 14 insect juvenile hormone mimics was tested for activity in amblyomma hebraeum by exposing newly engorged larvae to filter paper impregnated with hormone mimics. the most active compounds used in this assay were hs 103 (6-ethyl-3-pyridyl geranyl ether; ec50=0,0018 mg/cm2), zr 512 (ethyl 3,7,11-trimethyldodeca-2,4-dienoate; ec50=0,0022 mg/cm2), hs 2 (6-methyl-3-pyridyl geranyl ether; ec50=0,0035 mg/cm2), zr 615 (n-ethyl 3,7,11-trimethyldodeca-2,4-dieneamide; ec50=0,0035 mg/cm2), zr 77 ... | 1978 | 704043 |
| [transovarian passage of dugbe virus in the tick amblyomma variegatum (fabricius)]. | 1978 | 719844 | |
| repeated feeding of amblyomma herbraeum (acarina: ixodidae) immatures on laboratory hosts. host effects on tick yield, engorged weight and engorgement period. | rabbits and sheep are unable to acquire a resistance to larvae and nymphs of amblyomma hebraeum. after repeated infestation of hosts there is no progressive decline in either the tick yield or the engorged weight of fed ticks. seasonal fluctuations in engorged weights do occur however, with the weight declining in early to midwinter and increasing in early to midsummer. changes in hose physiology as a result of low temperature acclimatization appear to be responsible for the fluctuations. tick y ... | 1978 | 722460 |
| effects of 60co irradiation on amblyomma hebraeum koch, 1844 (acarina: ixodidae). | the effects of 60co irradiation on amblyomma hebraeum koch, 1844 were studied by mating normal females to males irradiated to attain dosages of 0, 2, 4, 6 and 8 kilorad. the males of all 5 groups were observed mating 7 days after being placed on the host. the higher the irradiation dosage received by the males, progressively longer were the feeding periods of the females mated with them and fewer completed their engorgement. furthermore, the mass of the females when engorged was lower, fewer lai ... | 1978 | 750959 |
| resistance to certain organophosphorus ixodicides in the bont tick, amblyomma hebraeum koch, in the republic of south africa and swaziland. | a series of in vitro trails confirmed resistance in the three-host tick, amblyomma hebraeum koch, to the organophosphorus ixodicides, dioxathion, chlorfenvinphos, quintiofos, bromophos-ethyl and a dioxathion/chlorfenvinphos combination. the results of a routine survey showed that a resistance factor of greater than 100x was present in the offspring of ticks in six of 115 field isolates tested. these six isolates were confined to the lowveld areas of the province of natal, republic of south afric ... | 1978 | 752082 |
| proteins and free amino acids in the salivary secretion and haemolymph of the tick amblyomma hebraeum. | electrophoretic and chromatographic separations of the salivary secretion of amblyomma hebraeum showed a less complex protein pattern than that of ornithodoros savignyi. a hyaluronidase active component was isolated. the haemolymph protein pattern showed a major protein fraction with a mobility slightly faster than that of bovine serum albumin. | 1978 | 754123 |
| tick-borne diseases of domestic animals in northern nigeria. ii. research summary, 1966 to 1976. | during the first 10 years of its existence, the department of parasitology and entomology of the faculty of veterinary medicine, ahmadu bello university in zaria, nigeria, confirmed or described for the first time the occurrence of 25 different tick-borne parasites of domestic animals in the northern part of the country. most of these organisms occur as inapparent infections but may serve as complicating factors in any adverse host condition. the transmission of babesia bigemina by boophilus dec ... | 1977 | 339447 |
| studies on theileriidae (sporozoa) in tanzania. vii. additional note on the transmission of theileria parva. | rhipicephalus evertsi successfully transmitted fatal east coast fever (theileria parva infection) in one experiment. a second one gave negative results, as did an attempted transmission of t. parva by amblyomma variegatum. | 1977 | 407682 |
| theileria mutans the infectivity for cattle of parasites derived from prefed amblyomma variegatum nymphs. | a steer was infected with theileria mutans (aitong) by application of infected amblyomma variegatum nymphs. uninfected a. variegatum larvae were applied to this steer when piroplasms developed. the resultant (and infected) a. variegatum nymphs were applied to the ears of rabbits. equal numbers of ticks were removed daily from rabbits and ground in eagles minimal essential medium. the infectivity of the supernatant fluid was tested in cattle. the produced supernatant fluids were infective between ... | 1977 | 414391 |
| studies on the ecology of the tick amblyomma hebraeum koch in the eastern cape province of south africa. ii. survival and development. | quantitative data are given on the survival and rate of development of amblyomma hebraeum koch in relation to temperature and humidity, in laboratory and field conditions. by comparison with other ixodid species the developmental periods of a. hebraeum are extremely long. development is most rapid at 30 c, and the duration of the developmental periods increases exponentially with decreasing temperature. oviposition occurs successfully at 15 and 30 c, egg incubation at 20 to 30 c, and larval and ... | 1977 | 577931 |
| relative susceptibility of jamaican strains of boophilus microplus, amblyomma cajennense, and anocentor nitens to various acaricides. | 1977 | 604370 | |
| chemoreceptor organs used in detection of pheromone(s) of the tick amblyomma hebraeum (acarina: ixodidae). | 1977 | 609070 | |
| amblyomma loculosum (ixodidae): first record from continental africa. | 1977 | 845892 | |
| on the use of the scrotum for feeding larval ixodid ticks on hosts. | the efficacy of feeding larval stages of amblyomma variegatum, hyalomma rufipes and boophilus decoloratus on the ears and scrotum of sheep is compared. the effect of age of larvae on the number that engorged on the animal was also investigated. a significantly greater number of larvae fed on scrotum than on ears. the greatest number of larvae engorged when they were fed on the scrotum or ear within 1-4 days of hatching. the older the larvae, the less the number that fed. the economic advantages ... | 1977 | 860573 |
| resistance to toxaphene by the bont tick, amblyomma hebraeum (koch). | a series of in vitro and in vivo trials confirmed resistance by the three-host bont tick, amblyomma hebraeum (koch), to toxaphene in the cape, natal and transvaal provinces of the republic of south africa, and in swaziland and transkei. resistance was present in 80 of 97 field strains examined. lindane and ddt resistance was present in the one field strain tested. the results of comparative in vivo hand spraying and plunge dipping trials confirmed those of the larval in vitro tests, thus validat ... | 1977 | 874951 |
| egg output in the weights and states of engorgement of amblyomma variegatum (fabr.) and boophilus annulatus (say): (ixodoidea: ixodidae). | the relationship between egg output and the weights and states of engorgement of two species of ixodid ticks amblyomma variegtum (fabr.) and boophilus annulatus (say) was studied, using over 3,000 female ticks of different sizes. based on the average weights and numbers of eggs produced, guide indices are provided for the predictability of the oviposition potential in females of different weights. linear correlation was noted between weights of the ticks and the weights and numbers of eggs they ... | 1977 | 881144 |
| ecology of the tick amblyomma hebraeum koch in the eastern cape province of south africa. i. distribution and seasonal activity. | in the eastern cape province of south africa larvae of amblyomma hebraeum koch occur in well-drained, shaded habitats, with a ground cover of grass. the life cycle is normally of 3 years duration. peak larval activity occurs in the summer of the 1st year, peak nymphal activity in the spring of the 2nd year, and peak adult activity in the summer of the 3rd year. larval activity shows no direct correlation with macroclimate. adult activity is correlated with, in the following order of signficance, ... | 1977 | 886412 |
| the microanatomy of the eye of amblyomma americanum (acari: ixodidae) and resultant implications of its structure. | 1977 | 886559 | |
| relationship of the occurrence and function of 2,6-dichlorophenol in two species of amblyomma (acari: ixodidae). | 1977 | 886561 | |
| 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 |
| evidence for an assembly pheromone(s) produced by males of the bont tick, amblyomma hebraeum (acarina: ixodidae). | 1977 | 903938 | |
| amblyomma inornatum (acarina: ixodidae): natural hosts and laboratory biology. | 1977 | 903941 | |
| transmission of a theileria species to cattle by the ixodid tick, amblyomma cohaerens donitz 1909. | amblyomma cohaerens nymphs, which had been collected as engorged larvae from african buffalo (syncerus caffer) in the mara region of kenya, transmitted a theilerial parasite to a steer. macroschizonts were detected in the regional lymph node of this steer 12 days after tick application and were subsequently detected for 3 days at low levels of parasitosis. the macroschizonts were large and had numerous nuclei, being morphologically unlike any other theilerial schizonts described previously from ... | 1977 | 906088 |
| pig production in the solomon islands. ii. diseases and parasites. | a study of diseases and parasites of pigs in the solomon islands during 1967 to 1969 indicated that infectious diseases were of little consequence. four arthropod parrasite species were found: one tick, one louse and two tabanids. the tick (amblyomma cyprium cyprium) was extremely rare. fifteen species of helminth parasites were recorded and of these stephanurus dentatus was the most prevalent. all species were identified except a filariid, of which only the microfilariae were seen. | 1977 | 910298 |
| use of high-performance liquid chromatography to separate very small quantities of radio-labelled metabolites from biological tissue. | in order to study the absorption, metabolism and tissue distribution of chemicals in cattle ticks amblyomma variegatum, a method of separating and recovering metabolites in picogram quantities was required. a high-performance liquid chromatographic system has been investigated for this purpose, using tritium-labelled amitraz and some potential metabolites. separation was carried out on nucleosil 5 mum no2 bonded phase. interchangeable pre-columns were used to extend the range of compounds which ... | 1977 | 914943 |
| field evaluation of arthropod repellent netting as a ground cloth against ticks. | tick repellent, wide-mesh net ground cloths were tested against amblyomma americanum (linnaeus) by the co2 bait technique. two repellents, n,n-diethyl-metatoluamide (deet) and 3 acetyl-2-(dimethyl-5-heptenyl)-oxazoladine, and two netting fabrics were compared. all combinations tested provided over 90% protection. the effectiveness of repellent ground cloths against chiggers is discussed. | 1976 | 961999 |
| peripheral nervous system of the ticks, amblyomma tuberculatum marx and argas radiatus railliet (acari: ixodoidea). | the peripheral nervous system of an ixodid and an argasid tick include the following components: (1) paired optic, cheliceral and pedipalpal nerves and unpaired stomodeal nerve arising from the pre-esophageal portion of the central nervous system (synganglion); (2) 4 pairs of pedal nerve trunks (each with appendicular and hemal branches) and 4 major pairs of opisthosomal nerves (including the paraspiracular, genital, postlateral-myosomal, and ano-myosomal nerves); and (3) the lateral "sympatheti ... | 1976 | 978369 |
| trypanosomes in amblyomma americanum from oklahoma. | 1976 | 978370 | |
| accumulating process and concentration ratios of ingested blood meals in larvae and nymphs of ten species of ticks. | the accumulating process and concentration ratios of ingested blood meals in the larvae and nymphs of amblyomma testudinarium, haemaphysalis campanulata, h. concinna, h. formosensis, h. hystricis, h. kitaokai, the bisexual and parthenogenetic strains of h. longicornis, h. megaspinosa, and ixodes persulcatus on rabbits and argas japonicus on chickens were comparatively investigated. the larvae and nymphs of the ixodid ticks examined and the larvae of a. japonicus concentrated the ingested blood m ... | 1976 | 980120 |
| comparative observations on some bionomics of japanese ixodid ticks under laboratory cultural conditions. | seventeen species of japanese ixodid ticks of the genera amblyomma, boophilus, haemaphysalis, ixodes, and rhipicephalus were reared in the laboratory under almost the same cultural conditions. their major biological characters, such as feeding, molting, oviposition, and hatching, were summarized in tables. there were some differences in these bionomics among the species. the general characteristics common to all the ticks, except amblyomma testudinarium, were as follows. the feeding period in im ... | 1976 | 980121 |
| tick paralysis in a sheep caused by nymphs of amblyomma variegatum. a preliminary report. | 1976 | 988681 | |
| studies on theileriidae (sporozoa) in tanzania. v. preliminary experiments on a new method for infecting ticks with theileria parva and theileria mutans. | bovine blood with a high parasitaemia of theileria mutans was injected through the cuticle into fully engorged nymphs of amblyomma variegatum which had recently detached from a rabbit. after moulting, they transmitted this parasite to a susceptible calf. rhipicephalus appendiculatus transmitted theileria parva in the same way, but results were negative with a. variegatum and t. parva. this method of infecting ticks appears promising for the isolation of theileria strains from the field, and migh ... | 1976 | 1006800 |
| [isolation of thogoto virus from amblyomma and boophilus ticks in central africa]. | a survey has been carried out in the cameroons and the central african republic about the role of the ticks in the ecology of arboviruses in central africa. attempts for virus isolation were made for 12,678 amblyomma variegatum, 3,276 boophilus decoloratus and 1,769 boophilus annulatus, by inoculation into suckling mice. from 968 pools which were inoculated, 20 yielded isolates which were identified to thogoto virus. considering previously published results concerning tick-borne virus isolations ... | 1976 | 1037382 |
| na, k-atpase in the salivary gland of the ixodid tick amblyomma hebraeum (koch) and its relation to the process of fluid secretion. | total and ouabain-sensitive atpase activities were determined in the salivary glands of ticks throughout the feeding cycle. activities were very low in unfed specimens. in the glands of feeding females, the activities rose until a maximum was reached for both atpase components at approximately 200 mg. the activities remain low in males throughout the feeding period. these findings are discussed in relation to the fluid secretory process of the salivary glands. | 1976 | 133818 |
| application of fluorescent antibody technique to determine infectivity rates of amblyomma americanium (l.) (acarina: ixodidae) salivary glands and oral secretions by theileria cervi (piroplasmorida: theileriidae). | salivary glands and oral secretion from individual field collected ticks, or ticks infected with theileria cervi in the laboratory, were subjected to fluorescent antibody techniques to determine the reliability of the technique in the identification of t. cervi in either the oral secretion or salivary glands. results indicated that the fluorescent antibody technique can be used with a reasonable degree of success in the identification of infected salivary glands or oral secretion. oral secretion ... | 1976 | 794455 |
| amblyomma americanum: area control with granules or concentrated sprays of diazinon, propoxur, and chlorpyrifos. | 1976 | 57127 | |
| studies on theileriidae (sporozoa) in tanzania. iii. experiments on the transmission of theileria mutans by rhipicephalus appendiculatus and amblyomma variegatum (acarina, ixodidae). | the parasite considered to be theileria mutans in east africa could not be transmitted transstadially by rhipicephalus appendiculatus (seven attempts); it was transmitted by amblyomma variegatum in 6 out of 7 experiments. the possibility that the original south african t. mutans, transmissible by r. appendiculatus, and the parasite called t. mutans in east africa, are different species, has to be considered. | 1976 | 824772 |
| aggregation response of nymphs to pheromone(s) produced by males of the tick amblyomma hebraeum (koch). | 1976 | 1250397 | |
| studies on theileriidae (sporozoa) in tanzania. i. tick transmission of haematoxenus veliferus. | haematoxenus veliferus was experimentally transmitted in cattle on two occasions by the tick amblyomma variegatum; transmission was transstadial, from nymph to adult. theileria mutans and cowdria ruminatium were transmitted at the same time. h. veliferus infected at least 15% of red cells in a splenectomized steer and 10% in a normal steer. one experiment on transstadial transmission from larva to nymph was unsuccessful. | 1976 | 1258136 |
| aride virus, a new ungrouped arbovirus infecting amblyomma loculosum ticks from roseate terns in the seychelles. | 1976 | 1259597 | |
| development of theileria mutants (aitong) in the tick amblyomma variegatum compared to that of t. parva (muguga) in rhipicephalus appendiculatus. | a comparison was made between the development of theileria mutans (aitong) in adult amblyomma variegatum ticks and the development of t. parva (muguga) in adult rhipicephalus appendiculatus ticks. both batches of ticks dropped as engorged nymphs from cattle whose intraerythrocytic parasitemias were approximately 40%, and it was thus possible to make a direct comparison of the infection rates produced in their tick hosts in this experiment by the 2 species of theileria. ticks of the 2 batches wer ... | 1975 | 809568 |
| 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 |
| a review of the evidence in retrospect for a rickettsial etiology in bullis fever. | the authors have presented evidence through work done 25-30 years ago for the rickettsial etiology of bullis fever, a forgotten epidemic which occurred with over a 1,000 cases among world war ii troops in training at camp bullis, texas. rickettsiae were recovered from blood and lymph nodes of patients and from ticks, amblyomma americanum, collected in the area. all patients gave a history of tick-bites. the human and tick strains of rickettsiae, carried in chick embryo culture and in animal pass ... | 1975 | 1103350 |
| some aspects of the ecology and lifecycle of amblyomma cajennense (fabricius 1787) in trinidad and their influence on tick control measures. | the distribution in trinidad of the tick amblyomma cajennense is defined, and the methods used to determine the boundaries of the infested areas are outlined. the relationships between climate, vegetation and husbandry methods and the distribution of the tick are described. monthly tick collections from specific animals to determine exact seasonal variations were not possible but a study was made of the normal life cycle under laboratory conditions, the results being used to assist in interpreti ... | 1975 | 1124964 |
| evaluation of co2-baited traps for survey of amblyomma maculatum koch and dermacentor variabilis say (acarina: ixodidae). | 1975 | 1159725 | |
| the effect of host species on the engorgement, molting success, and molted weight of the gulf coast tick, amblyomma maculatum koch (acarina: ixodidae). | 1975 | 1159746 | |
| studies on the ecology of amblyomma marmoreum koch 1844 (acarnia: ixodidae). | 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 is the moutain tortoise (geochelone pardalis), and in the home areas of tortoises the density of ticks is high. larvae are active in late summer and autumn. the rate of feeding is temperature-depende ... | 1975 | 1165558 |
| reproduction in ticks (acari: ixodoidea). 4. effects of mechanical and chemical stimulation on oocyte development in amblyomma americanum. | 1975 | 1172534 | |
| 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 |
| host and distributional records for the tick amblyomma inornatum (banks) (acarina: ixodidae), with descriptions of the immature stages. | 1975 | 1223295 | |
| [the tick amblyomma variegatum (ixodidae), apparently resistant to arsenic, in madagascar]. | 1975 | 1230882 | |
| resistance of purebred brahman, hereford, and brahman times hereford crossbred cattle to the lone star tick, amblyomma americanum (acarina: ixodidae). | 1974 | 4455918 | |
| some experiments on the transmission of theileria mutans (theiler, 1906) and theileria parva (theiler, 1904) by the ticks amblyomma variegatum (fabricius, 1794) and rhipicephalus appendiculatus neumann, 1901, in uganda. | 1974 | 4607395 | |
| fine structure of the central nervous system of dermacentor variabilis (say), amblyomma americanum (l.), and argas arboreus kaiser, hoogstraal, and kohls (ixodoidea). | 1974 | 4852052 | |
| the ecology of amblyomma cajennense a parasite of man and animals in trinidad. | 1973 | 4777424 | |
| the effect of immersion in water on the immature stages of the ixodid ticks-rhipicephalus appendiculatus neumann 1901 and amblyomma variegatum fabricius 1794. | 1973 | 4787718 | |
| a search for the epidemic typhus agent in ethiopian ticks. | the presence of antibodies to rickettsia prowazeki in domestic animals from several parts of africa, and the isolation of this rickettsia from the blood of goats and sheep and from ticks off cattle or camels in ethiopia, led to the hypothesis that r. prowazeki in nature may occur in an extrahuman cycle involving ticks and domestic animals. this study attempted to recover r. prowazeki from 2 624 ticks (4 genera, 10 species) collected in central and southern ethiopia. the ticks were examined by th ... | 1973 | 4204491 |
| human skin lesions in east central state, nigeria due to the larvae of amblyomma variegatum (fabricius, 1794). | 1973 | 16366347 | |
| [detection of amblyomma gemma dön. (ixodidae) in the crimea]. | 1972 | 4271864 | |
| ultrastructure of haller's organ in the tick amblyomma americanum (l.). | 1972 | 4334800 | |
| permeability of tarsal sensilla in the tick amblyomma americanum l. (acarina, ixodidae). | 1972 | 4647364 | |
| redescription of amblyomma fulvum neumann 1899 (acarina: ixodidae), a parasite of the giant anaconda in northern south america. | 1972 | 5036198 | |
| a method of collecting nymphal and adult lone star ticks, amblyomma americanum (l.) (acarina: ixodidae), from woodlots. | 1972 | 5036200 | |
| fine structural analysis of palpal receptors in the tick amblyomma americanum(l.). | 1972 | 5042252 | |
| 2,6-dichlorophenol, sex pheromone of the lone star tick. | the compound 2,6-dichlorophenol was identified from female lone star ticks, amblyomma americanum, and is believed to be a sex pheromone of this arthropod. the natural occurrence of a chlorinated organic compound in a land animal is new. the presence of similar compounds of exogenous origin is common in animals, but efforts to implicate an outside source for the halogenated phenol have failed. | 1972 | 5054146 |
| bionomics of the gopher tortoise tick, amblyomma tuberculatum marx. | 1972 | 5057497 | |
| permeability of tarsal sensilla in the tick amblyomma americanum l. (acarina, ixodidae). | ticks were submerged in silver-protein solution, prior to fixation for electron microscopy, in order to trace the pathway of molecules in supposed tarsal chemoreceptors. sensilla with radially arranged cuticular canals (100-200 a in diameter) leading to the centrally located dendrites show silver granules inside the canals and in the central lumen, thus directly making contact with the dendrites. sensilla with large, plugged pores (1200 a) exhibit an accumulation of silver granules in the pore o ... | 1972 | 18631584 |
| [notes on the ticks of sicily, with descriptions of hyalomma detritum and amblyomma variegatum]. | 1971 | 5147924 | |
| the ecology of the lone star tick, amblyomma americanum (l.), in two contrasting habitats in virginia (acarina: ixodidae). | 1971 | 5153583 | |
| response of ovipositing amblyomma maculatum koch (acarina: ixodidae) to photoperiod. | 1971 | 5160257 | |
| mate-seeking by female amblyomma maculatum (acarina: ixodidae) on a bovine. | 1971 | 4938838 | |
| fine structure of tarsal sensilla in the tick amblyomma americanum (l.). | 1971 | 5541841 | |
| effect of age on the attachment rate of the parasitic stages of the lone star tick, amblyomma americanum (linnaeus) (acarina: ixodidae), in the laboratory. | 1970 | 5435814 | |
| mating behavior and reproduction of the lone star tick, amblyomma americanum. | 1970 | 5449398 | |
| amblyomma (acarina: ixodidae) on white-tailed deer, odocoileus virginianus (zimmermann), from south texas with implications for theileriasis. | 1970 | 5501217 | |
| [contribution to a study of the ticks of senegal (acarina, ixodoidea). i. larvae of amblyomma (koch) and hyalomma (koch)]. | 1970 | 5508156 | |
| parasites of the collared peccary from texas. | results of a survey of the parasites of the collared peccary (dicotyles tajacu angulatus) in texas are presented. three ectoparasites, amblyomma cajennense, dermacentor variabilis, and pulex porcinus were very common on peccaries from south texas, but less common or absent in arid west texas. sucking lice, pecaroecus javalii, were common on peccaries from west texas, but were not found in south texas. the known range of this louse in texas is extended into the big bend area. two ticks, amnblyomm ... | 1970 | 16509125 |
| ecology of tick vectors of american spotted fever. | the author reviews the natural history of the tick vectors of american spotted fever. the discussion concerns the ecology of the rocky mountain wood tick, dermacentor andersoni, the american dog tick, dermacentor variabilis, and the lone-star tick, amblyomma americanum, all of which are proven vectors of rocky mountain spotted fever to man. also included are the rabbit tick, haemaphysalis leporispalustris and dermacentor parumapertus, which very rarely bite man but which are considered of import ... | 1969 | 5306621 |
| [the tick amblyomma testudinis (conil 1877): its development and effect on the host]. | 1969 | 5380272 | |
| a new species of amblyomma from iguanas in the caribbean (acarina: ixodidae). | 1969 | 5391156 | |
| [amblyomma variegatum of african or antillean origin and rickettsia of the dermacentroxenus genus]. | 1969 | 4933938 | |
| eradication efforts against tropical bont tick, amblyomma variegatum, in the virgin islands. | 1969 | 5766830 | |
| arbovirus studies in the ohio-mississippi basin, 1964-1967. vii. lone star virus, a hitherto unknown agent isolated from the tick amblyomma americanum (linn). | 1969 | 5810802 | |
| white-tailed deer, a new host for amblyomma inornatum. | 1969 | 5816091 | |
| field vector studies of epizootic east coast fever. vi. the occurrence of amblyomma variegatum and a. lepidum in the east coast fever zones. | 1968 | 5750916 |