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relationship between the resistance of cattle to haemaphysalis longicornis and to boophilus microplus.cattle that had been exposed to haemaphysalis longicornis were as susceptible to boophilus microplus as cattle that had never been exposed to either species of tick. cattle with acquired resistance to both species ranked consistently for levels of resistance to each when infested separately. concurrent infestation with h. longicornis had no effect on ranking for resistance to b. microplus. the coefficient of concordance between the rankings of individuals on their levels of resistance to both sp ...19854074218
ticks on livestock in st. lucia.cattle, sheep, goats and horses were examined for ticks. over 95% of holstein cross-breeds, 28% of sheep (local mixed breeds) and 18% of goats (local mixed breeds) examined from 18 august to 4 september 1983 were infested with the southern cattle tick, boophilus microplus canestrini. about 90 and 17% of the horses examined were infested with the tropical horse tick, anocentor nitens neumann, and the tropical bont tick, amblyomma variegatum fabricius, respectively. the tropical bont tick was foun ...19854090245
characterization of the organophosphorus-resistant mt alford, gracemere and silkwood strains of the cattle tick, boophilus microplus. 19744139946
enzyme activity of the cytochrome system of the egg and larva of the cattle tick (boophilus microplus). 19734146220
detection of trypanosoma theileri in ethiopian cattle ticks. 19734149680
[study of livestock ticks in guadeloupe and martinique. 3. resistance of the boophilus microplus tick to gammexane in the french antilles]. 19674177893
the soluble cuticular proteins form three arthropod species: scylla serrata (decapoda: portunidae), boophilus microplus (acarina: ixodidae) and agrianome spinicollis (coleoptera: cerambycidae). 19744214646
boophilus microplus: antihistaminic and tranquillizing drugs and cattle resistance. 19694396008
boophilus microplus: antihistaminic and tranquilizing drugs and cattle resistance. 19694396213
dopamine and noradrenaline in the salivary glands and brain of the tick, boophilus microplus: effect of reserpine. 19744435160
the transmission of babesia bovis using frozen infective material obtained from boophilus microplus larvae. 19744449642
oviposition of boophilus microplus (canestrini) (acarida : ixodidae). i. influence of tick size on egg production. 19744463680
oviposition of boophilus microplus (canestrini) (acarida: ixodidae). ii. influence of temperature, humidity and light. 19744466310
control of the southern cattle tick by pour-on animal systemic insecticides. 19724639456
transmission of anaplasma marginale by the cattle tick boophilus microplus. 19724640755
preliminary studies on the transmission of anaplasma marginale by boophilus microplus. 19734689814
bioassay of chlorphenamidine using larvae of the cattle tick boophilus microplus. 19734711148
inheritance of dimethoate resistance in the mackay strain of the cattle tick (boophilus microplus) in australia. 19734717730
culture of embryonic cells from the tick boophilus microplus (ixodidae). 19734760627
toxicity to boophilus microplus of formamidine acaricides and related compounds, and modification of toxicity by certain insecticide synergists. 19734770945
boophilus microplus: digestion of hemoglobins by the engorged female tick. 19744815010
babesia argentina: the infection of splenectomized calves with extracts of larval ticks (boophilus microplus). 19744819982
acaricide ac 84,633: first trials for control of boophilus microplus. 19744839224
toxicity of piperonyl butoxide to boophilus microplus. 19744858271
cattle tick in new south wales. 19694936858
loss of infectivity of a vaccine strain of babesia argentina for boophilus microplus. 19664961183
the infection of boophilus microplus with babesia bigemina. 19684984380
[fine structure of the merozoites of babesia bigemina in the ovary of boophilus microplus and boophilus decoloratus]. 19694988938
bovine babesiasis: estimation of infection rates in the tick vector boophilus microplus (canestrini). 19714999518
sulphur and the cattle tick boophilus microplus. 19725013812
electrical studies on the feeding of the cattle-tick, boophilus microplus. 19725015014
the inheritance of resistance by cattle to cattle tick. 19725068812
behavior of larvae of the cattle tick, boophilus microplus (canestrini), on cattle of differing degrees of resistance. 19715090974
new types of organophosphorus-resistant ticks (boophilus microplus). 19715102657
a modification of pasture spelling to reduce acaricide treatments for cattle tick control. 19715103591
factors affecting the distribution and abundance of the cattle tick in australia: observations and hypotheses. 19715105775
the effect of cattle tick (boophilus microplus) on pregnant and lactating brahman-cross and british-breed cows in northern australia. 19715106528
the acquired resistance to babesia argentina of cattle exposed to light infestation with cattle tick (boophilus microplus). 19715106905
the effect of cattle tick (boophilus microplus) on beef production in the northern territory. 19715106909
mixtures of chlorphenamidine with other acaricides for the control of organ ophosphorus-resistant strains of cattle tick boophilus microplus. 19715120208
labelling larvae of the cattle-tick boophilus microplus, with 32 p to follow their movements on the host. 19715129806
alterations in host metabolism by the specific and anorectic effects of the cattle tick (boophilus microplus). 3. metabolic implication of blood volume, body water, and carcass composition changes. 19715159198
development and survival of the tick boophilus microplus (can.) in laboratory and under natural conditions of cuba. 19715163210
metabolism of chlorphenamidine in larvae of the cattle tick boophilus microplus. 19715163487
alterations in host metabolism by the specific and anorectic effects of the cattle tick (boophilus microplus). i. food intake and body weight growth. 19715280977
alterations in host metabolism by the specific and anorectic effects of the cattle-tick (boophilus microplus). ii. changes in blood composition. 19715280978
boophilus microplus (acarina: ixodidae): experimental infestations on cattle restrained from grooming. 19695401459
observations on the dispersal of larvae of the cattle tick boophilus microplus (can.). 19705450439
the absorption and metabolism of (14c)ddt in ddt-resistant and susceptible strains of the cattle tick boophilus microplus. 19705475727
the efficacy of supona (chlorfenvinphos) against cattle ticks in nigeria under field conditions. 19705535686
a modification to the collection of saliva from boophilus microplus. 19715552701
esterases and a carbohydrate-splitting enzyme in the saliva of the cattle tick, boophilus microplus. 19715553457
the mechanism of feeding and salivation in boophilus microplus (canestrini, 1887). 19715565392
[further observations in madagascar on the resistance of the tick boophilus microplus (canestrini) to insecticides of the chlorinated hydrocarbon family]. 19675614032
[a study of the cattle ticks in guadelope and martinique. ii. pathogenic agents transmitted by ticks]. 19675628907
insecticides for control of the cattle tick and the southern cattle tick on cattle. 19685642113
mechanism of resistance to organophosphorus acaricides in a strain of the cattle tick boophilus microplus. 19685643270
inheritance of resistance to organophosphorus acaricides in the cattle tick, boophilus microplus. 19685666452
brain cholinesterase activity and its inheritance in cattle tick (boophilus microplus) strains resistant and susceptible to organophosphorus acaricides. 19685666453
the efficacy and stability of dursban insecticide in dipping vat for control of the southern cattle tick. 19685666957
acetylcholinesterase insensitivity in the biarra strain of the cattle tick boophilus microplus, as a cause of resistance to organophosphorus and carbamate acaricides. 19685680996
loss of toxicity to cattle ticks of a wettable powder formulation of coumaphos. 19685689244
eradication of cattle tick (boophilus microplus) from magnetic island, queensland, in the presence of native fauna. 19685693053
developments in the resistance status of the southern cattle tick to organophosphorus and carbamate insecticides. 19685723760
the feeding processes of the cattle tick boophilus microplus (canestrini). ii. the sequence of host-tissue changes. 19685740485
resistance of cattle to the tick boophilus microplus (canestrini). i. development of ticks on bos taurus. 19685761112
resistance of cattle to the tick boophilus microplus (canestrini). ii. stages of the life cycle of the parasite against which resistance is manifest. 19685761113
metabolism of aniline in the cattle tick boophilus microplus canestrini. 19695781640
cholesterol in the cuticular wax of boophilus microplus. 19695786195
the ecology of cattle ticks in bugisu, uganda. 19695789101
the production of cuticle wax by engorged females of the cattle tick, boophilus microplus (canestrini). 19695793885
the effect of cattle tick (boophilus microplus)on production of brahman-cross and british-breed cattle in northern australia. 19695814104
effect of fungal extracts on the cattle tick, boophilus microplus. 19695814109
culture of an organophosphorus-resistant strain of boophilus microplus (can.) and an assessment of its resistance spectrum. 19665945563
[study on cattle ticks in guadelupe and martinique. i. ticks and their distribution (acarina, ixodoidea)]. 19665951733
metabolism of coumaphos in larvae of the cattle tick boophilus microplus. 19665970060
the feeding processes of the cattle-tick boophilus microplus (canestrini): a study in host-parasite relations. i. attachment to the host. 19665971582
acaricide tests on the biarra strain of organophosphorus resistant cattle tick boophilus microplus from southern queensland. 19676067998
investigations into the cold resistance of the eggs and larvae of boophilus decoloratus (koch, 1844), boophilus microplus (canestrini, 1888) and margaropus winthemi karsch, 1879. 19676069321
acaricide resistance and cattle tick control. 19676069461
acaricide resistance and cattle tick control. 19676069462
ixodes nipponensis n. sp. (ixodoidea, ixodidae), a common cattle tick in japan. 19676078267
bovine leukosis virus infectivity in boophilus microplus ticks. 19846095512
pharmacology of the octopamine-stimulated adenylate cyclase of the locust and tick cns.the presence of an octopamine-stimulated adenylate cyclase is shown in homogenates of the cerebral ganglion of the locust schistocerca americana gregaria and the synganglion of the tick boophilus microplus. a detailed study of the pharmacology of the activation of the enzyme of the two species is reported and compared with the pharmacology of octopamine receptors in other invertebrate preparations.19846146464
susceptibility of brazilian samples of boophilus microplus to organophosphorus acaricides.this paper describes the susceptibility of various samples of boophilus microplus from the southern region of minas gerais state in brazil to the 4 commonest organophosphorus acaricides employed in the area. all samples showed some degree of resistance to each of the compounds used. the resistance factor varied from 1.42 to 132.90, being less in the case of dicrotophos fenthion than with chlorpyrifos and coumaphos.19806154364
inheritance of resistance to chlorpyrifos in the mt alford strain and to diazinon in the gracemere strain of the cattle tick (boophilus microplus).reciprocal crossing of the mt alford (a) strain of the cattle tick b. microplus with a susceptible (s) strain and phenotype analysis of f1, testcross and f2 progeny showed that high chlorpyrifos resistance in strain a was due to two genes that were complementary and jointly exhibited incomplete dominance. diazinon resistance in the gracemere (g) strain appeared to be similarly inherited. the 'average' degree of dominance ('average dominance', dav) of high chlorpyrifos resistance over susceptibil ...19826186234
ultrastructural identification of neurohaemal sites in a tick: evidence that the dorsal complex may be a true endocrine gland.a fine structural study has been made of the 'paraganglionic plates' associated with the perineurium and of the 'retrocerebral organ' associated with the periganglionic sheath of the tick boophilus microplus; these structures have been postulated, from descriptions by light microscopy, to be tick neurohaemal organs. neurosecretory terminals are observed frequently in the neural lamella/perineurial sheath, particularly in a dorso-lateral area which may correspond to the 'paraganglionic plates'. n ...19836192546
dna polymorphisms and subpopulations in babesia bovis.independent isolates of babesia bovis differ by only a limited number of polypeptides, some of which may be important as host protective antigens. avirulent derivatives of these parasites also differ from their virulent counterparts in only a few polypeptides. to identify genes encoding such polypeptides we have isolated cdna clones corresponding to poly(a)+ rnas that are expressed only in certain isolates. for this purpose a cdna clone library was constructed from poly(a)+ rna of the k-avirulen ...19846205269
boophilus microplus: cattle antienzymes to larval phosphomonoesterases. 19806250874
action of formamidine pesticides on octopamine receptors.the formamidines are a structurally novel group of pesticides of growing importance in the control of mites, cattle ticks and certain orders of insects which have become resistant to conventional acaricides and insecticides. their mode of action is complex with dose-dependent lethal and subletahal effects. at sublethal levels they cause behavioural changes in the target pest species (for example in feeding and in mating behaviours), changes which are responsible for the protective effects on cro ...19806251379
the role of specific immunoglobulins in antibody-dependent cell-mediated cytotoxicity assays during babesia bovis infection.a stabilate prepared from babesia bovis-infected boophilus microplus ticks was used to infect intact adult cattle. whole sera and immunoglobulin fractions from representative sera were tested by complement fixation (cf), indirect fluorescent antibody (ifa), and antibody-dependent cell-mediated cytotoxicity (adcc) assays. the last test utilized 51cr-labeled chicken erythrocytes coated with babesia bovis antigen as targets. mononuclear cell preparations, obtained from peripheral blood of normal do ...19846369760
the effect of chemotherapy on babesia bigemina in the tick vector boophilus microplus. 19846469445
ultrastructure of the accessory glands of gene's organ in the cattle tick, boophilus.the organization and ultrastructure of the accessory glands of the cattle tick, boophilus microplus, are described. the glands consist of two groups of acinar cells situated on either side of gene's organ. a single acinus consists of from eight to 12 cells and each cell is connected via an individual duct to pores on the dorsal surface of the mouthparts. the position of these pores is such that the secretion of the accessory glands is incorporated into the egg wax during oviposition. each gland ...19846484940
boophilus microplus tick burdens on grazing cattle in colombia.this study was conducted at carimagua research centre in a well-drained savanna area in the eastern plains of colombia. the objectives were to note the effect of ecological factors on tick burdens, principally the effect of the environment given by four grasses on the seasonal variations of tick populations. adult female tick counts were carried out on heifers grazing four pastures and tick larvae on the grass detected by cloth dragging. tick counts were significantly higher on animals grazing b ...19846485100
tick-borne rickettsioses in pune district, maharashtra, india.an extensive study on tick-borne rickettsioses in the pune district of maharashtra revealed that indian tick typhus exists as a zoonosis, which only occasionally causes disease in man. by sero-conversion in guinea pigs, presumptive isolates of rickettsia conori and coxiella burnetii were recovered from 4 of the 11 species of ticks examined. boophilus microplus and rhipicephalus haemaphysalis were found to be harbouring r. conori whereas c. burnetii was isolated from haemaphysalis intermedia and ...19846500861
studies on ticks of veterinary importance in nigeria. xi. observations on the biology of ticks detached from the red-flanked duiker (cephamophys rufulatus) and parasites encountered in their blood.some aspects of the biology of amblyomma variegatum and boophilus decorolatus detached from red-flanked duikers were studied. smears were also made from the blood of the duikers and examined for the presence of parasites. anaplasma marginale was the only blood parasite found in the blood smears. compared with ticks detached from cattle, duiker ticks produced a greater number of eggs. the lengths and breadths of eggs produced by duiker ticks were greater than those of cattle ticks and unlike a. v ...19846538723
decreased resistance of bos taurus cattle on a diet supplemented with whole cotton seed to the tick boophilus microplus (canestrini).resistance to the tick b. microplus was compared in bos taurus steers fed hay (low fat (lf) diet) with those fed hay supplemented with whole cotton seeds (high fat (cs) diet) which made them hyperlipidaemic. the mean number of adult female ticks maturing from the same artificial doses of larvae was about 2.7 times higher on animals fed the cs diet than on animals fed the lf diet. in both dietary groups the effect of ticks: depressed packed-cell volume, plasma cholesterol and phospholipid levels, ...19846548592
babesia bovis: proteins of virulent and avirulent parasites passaged through ticks and splenectomized or intact calves.passage of the avirulent vaccine (k) strain of babesia bovis (ka) through either boophilus microplus ticks, intact calves, or intact calves and then ticks, resulted in two distinct protein and protein antigen profiles as analyzed by two-dimensional gel electrophoresis of biosynthetically labeled proteins and immunoprecipitates. different degrees of expression of two major acidic antigens of ka designated ka1 (mr 47,500) and ka2 (mr 43,000) were observed. ka1 was apparently lost following passage ...19836617805
application of trans and cis isomers of p-nitrophenyl-(1r, s)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate to the assay of pyrethroid-hydrolyzing esterases.a continuous-rate assay for the detection of esterases which hydrolyze synthetic pyrethroids is described. the assay is based on the release of p-nitrophenolate ion upon hydrolysis of the pyrethroid-like compound, trans- or cis-p-nitrophenyl-(1r,s)-3-(2,2-dichlorovinyl)-2, 2-dimethylcyclopropanecarboxylate, at ph 7.4 where spontaneous hydrolysis is not detected. the reagent is solubilized by 0.02% triton x-100 in the presence of 1.0% ethanol. a simple procedure for the synthesis and separation o ...19836625152
observations on body temperature of the host and resistance to the tick boophilus microplus (acari: ixodidae). 19836644752
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