Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| prevalence of anthelmintic resistant nematodes in sheep in south-east england. | the prevalence of anthelmintic resistant nematodes among 52 commercial flocks in south-east england was investigated by comparing the faecal egg counts of groups of lambs before, and seven days after, treatment with thiabendazole and levamisole. evidence of thiabendazole resistance was found on seven farms. in each case haemonchus contortus was the only species of nematode involved. in vitro egg hatch assays carried out for isolates from these farms gave ed50 estimates of 0.065 to 0.332 microgra ... | 1984 | 6464318 |
| effect of cimetidine on abomasal ph and haemonchus and ostertagia species in sheep. | cimetidine, a histamine h2-receptor blocking agent which reduces gastric acid flow in simple stomach animals was administered directly into the abomasum of sheep at 100 mg kg-1 twice daily for five consecutive days and again on the eighth day. the drug caused a significant increase in the ph values of the abomasal contents and was highly effective in reducing the adult population of haemonchus contortus (100 per cent) and ostertagia circumcincta (70 per cent) in the abomasum of sheep. the possib ... | 1984 | 6463375 |
| studies on haemonchus contortus. xii. effect of trichostrongylus axei in dorper lambs on natural pasture lightly infested with h. contortus. | weaned dorper lambs on natural pasture were predosed with 40 000 infective larvae (l3) of trichostrongylus axei, irradiated (0,3 kgy) l3 of t. axei or closantel at 10 mg/kg either in september or november 1978 and were compared with merino yearlings predosed with 40 000 l3 of t. axei in november 1977. the following summer (december-march) only 178,6 mm of rain fell and very few h. contortus were present on pastures. artificial challenge with 20 000 l3 of haemonchus contortus with the local strai ... | 1984 | 6462635 |
| studies on haemonchus contortus. xi. the effect of a bovine strain of trichostrongylus axei in merinos on natural pastures heavily infested with h. contortus. | sheep grazed on natural pastures heavily infested with infective larvae of haemonchus contortus. sixty-eight weaned merinos were divided into 6 groups on day 0 (23 november 1977), and on day +14 (7 december) 79 merinos were divided into 7 groups. there were 2 groups of undosed controls and other groups were either dosed with infective larvae of trichostrongylus axei (bovine strain) only on days 0 and +14, or in combination with h. contortus, or with subsequent doses of h. contortus, 28 days late ... | 1984 | 6462634 |
| studies on haemonchus contortus. x. the effect of trichostrongylus axei in merinos on artificial pastures. | a recently established eragrostis curvula pasture 1,1 ha in size at hennops river in the transvaal highveld was contaminated from 6 october 1976 until 20 may 1977 by 30 weaned merinos, each infested with 7 000 infective larvae of h. contortus. on 2 november 1976 3 groups of weaned merinos and again on 10 january 1977 a further group of merinos were infested with 40 000 infective larvae of trichostrongylus axei. from 19 november a single group of sheep, predosed with t. axei, and a control group ... | 1984 | 6462632 |
| studies on haemonchus contortus. ix. the effect of trichostrongylus axei in merinos on natural pasture. | four groups of 6-7-month-old merino lambs were each dosed with 40 000 infective larvae of trichostrongylus axei on 2 november 1976 and subsequently exposed to challenge with haemonchus contortus on natural grazing at the university of pretoria's experimental farm in the eastern suburbs of pretoria. one of these groups and one group of controls were killed every 8 weeks from the end of december 1976-june 1977. predosing with t. axei was greater than 50% effective against 5th stage and adult h. co ... | 1984 | 6462631 |
| energy metabolism of adult haemonchus contortus in vitro: a comparison of benzimidazole-susceptible and -resistant strains. | in vitro biochemical characteristics of three strains of haemonchus contortus, benzimidazole-susceptible, mebendazole-resistant and thiabendazole-resistant isolates, were investigated. steady-state pool sizes of glucose and metabolic intermediates, including adenine nucleotides and end-products revealed no differences between adult worms resistant or susceptible to benzimidazoles in 30-60 min incubations. possible regulatory steps in the glycolytic pathway are identified as those involving the e ... | 1984 | 6427605 |
| partial biochemical and serological characterization of exsheathing fluid and somatic extracts of infective larvae and adult females of haemonchus contortus. | exsheathing fluid from infective larvae of haemonchus contortus may contain antigens which induce protective immunity upon infection in sheep. in this study, a rapid method of preparing exsheathing fluid was used to determine its biological activity, purity and antigenic complexity. protein in exsheathing fluid ranged from 21-59.5 micrograms/ml and no carbohydrate was detected. gel filtration showed a single broad peak which retained biological activity and polyacrylamide gel electrophoresis dem ... | 1984 | 6426763 |
| reversal of order of ecdysis in haemonchus contortus (nematoda). | exposure of haemonchus contortus infective larvae to carbon dioxide under specific conditions is believed to activate a succession of events that ultimately control both exsheathment and subsequent development to the fourth stage. rarely at ph 6, but always at ph 2, worms fail to exsheath yet develop to the fourth stage surrounded by cuticles two and three. failure to exsheath is probably a consequence of inactive enzymes in exsheathing fluid, because exposure to edta, which inactivates exsheath ... | 1983 | 6406659 |
| anthelmintic efficacy of mebendazole suspension against induced helminth infections in south african sheep and cattle. | critical controlled tests were performed in 157 sheep (8 experiments) and 34 cattle (2 experiments) to evaluate the anthelmintic activity of mebendazole suspension, administered intraruminally via a stomach tube at a dosage rate of 15 mg of mebendazole/kg of body weight, against induced infections of immature and adult stages of commonly encountered nematode parasites in south africa. in the sheep, the controlled efficacy of mebendazole suspension was good to excellent (90.1% to 100%) against al ... | 1984 | 6375485 |
| changes in water content and volume accompanying exsheathment of haemonchus contortus. | 1982 | 6279531 | |
| effect of ph and temperature on four dehydrogenase enzymes of haemonchus contortus. | 1984 | 6242277 | |
| the helminths of various antelope species from natal. | helminth parasites were collected from 2 bushbuck, tragelaphus scriptus, 2 red duiker, cephalophus natalensis, 1 oribi, ourebia ourebi, and 4 reedbuck, redunca arundinum, that died or were culled in various parts of natal. one trematode genus, 1 cestode genus and 12 nematode species were recovered. haemonchus contortus. ostertagia harrisi, trichostrongylus capricola, trichostrongylus vitrinus, cooperia rotundispiculum and setaria scalprum are new parasite records for the red duiker. trichostrong ... | 1984 | 6241958 |
| therapeutic and prophylactic efficacy of morantel when administered directly into the rumen of cattle on a continuous basis. | the efficacy of morantel tartrate when administered on a continuous basis directly into the rumen/reticulum of cattle, either by a cannula or from a specially designed device, was evaluated against gastrointestinal parasites under laboratory conditions. in two experiments the continuous infusion of morantel at rates between 0.26 and 1.04 mg/kg body weight per day using a peristaltic pump was highly efficacious in both preventing the establishment of infections and removing established infections ... | 1983 | 6225238 |
| amino acid biosynthesis in haemonchus contortus from c14-labelled precursors, in vitro. | adult haemonchus contortus (nematoda: trichostrongylidae) was investigated for its ability to utilize various c14-labelled precursors, i.e., glucose, acetate, co2 and palmitic acid, for amino acid biosynthesis. h. contortus has been demonstrated to be capable of synthesizing essential as well as non-essential amino acids. label from all the precursors was detected in aspartic acid, lysine, histidine, cystine, cysteine, glutamic acid, proline, arginine, tyrosine, alanine, glycine, serine, valine, ... | 1984 | 6093333 |
| comparative activity and intracellular distribution of tricarboxylic acid cycle enzymes in haemonchus contortus larvae and rat liver. | 1967 | 6080499 | |
| differential hatching of eggs from morph variants of haemonchus contortus cayugensis (nematoda, trichostrongylidae). | 1967 | 6068135 | |
| comparison between copper-arsenic-piperazine and haloxon-piperazine drenches for treatment of haemonchus contortus and oesophagostomum columbianum in sheep. | 1967 | 6067862 | |
| the seven-day growth of haemonchus contortus compared in worm-free and experienced sheep. | 1967 | 6067678 | |
| glycolysis in haemonchus contortus larvae and rat liver. | 1967 | 6049998 | |
| critical trials with tetramisole given to lambs experimentally infected with haemonchus contortus, ostertagia circumcincta, nematodirus battus and trichostrongylus colubriformis. | 1966 | 6008430 | |
| immunity to haemonchus contortus infection: relationship between age and successful vaccination with irradiated larvae. | 1966 | 6008311 | |
| immunity to haemonchus contortus infection. failure of x-irradiated larvae to immunize young lambs. | 1966 | 6008310 | |
| the vulval flap formula of haemonchus contortus from sheep in south-east england. | 1966 | 6008304 | |
| the dynamics of the host-parasite relationship. v. evidence for immunological exhaustion in sheep experimentally infected with haemonchus contortus. | 1966 | 6008293 | |
| the dynamics of the host-parasite relationship. iv. the response of sheep to graded and to repeated infection with haemonchus contortus. | 1966 | 6008292 | |
| studies on immunity to haemonchus contortus infection: the elimination of a challenge infection by immune sheep. | 1966 | 6008291 | |
| pathological changes and vitamin b12 metabolism in sheep parasitised by haemonchus contortus, ostertagia spp. and trichostrongylus colubriformis. | 1966 | 6006735 | |
| acquired resistance to haemonchus contortus in young lambs. | 1966 | 6006081 | |
| activity of a series of piperidines against haemonchus contortus larvae. | 1966 | 5968022 | |
| susceptibility of the offspring of haemonchus contortus surviving low-level phenothiazine treatment to single dosees of phenothiazine and thiabendazole. | 1966 | 5950158 | |
| studies on blood picture in stomachworm (haemonchus contortus and haemonchus bispinosus mixed infection) infection in sheep and goats. | 1966 | 5949912 | |
| studies on evaluation of low-level administration of phenothiazine in selection of drug-resistant haemonchus contortus. | 1966 | 5948718 | |
| development of haemonchus contortus in media designed for studies on caenorhabditis briggsae. | 1966 | 5910447 | |
| the development of haemonchus contortus to the fourth stage in vitro. | 1966 | 5910446 | |
| light sense in nematodes. | the stimulating effect of daylight on the oxygen uptake of the infective larvae of haemonchus contortus and nippostrongylus basiliensis, measured at constant temperature, provides the first proof of a dermal light sense in the nematoda. nippostrongylus larvae are less sensitive than those of haemonchus and require very high light intensities before a significant effect can be detected. | 1966 | 5903341 |
| reactions of two populations of haemonchus contortus to continual low dosages of phenothiazine of varying purity and particle size in sheep. | 1965 | 5894162 | |
| hemoglobin types and resistance to haemonchus contortus in sheep. | 1969 | 5824905 | |
| relationship of the host's diet to the parasitic development of haemonchus contortus. | 1969 | 5815927 | |
| the effect of time and season on the constancy of morph in haemonchus contortus cayugensis infections. | 1969 | 5815824 | |
| changes in sex ratio in haemonchus contortus cayugensis. | 1969 | 5815823 | |
| evaluation of naphthalophos against oestrus ovis and a thiabendazole-tolerant strain of haemonchus contortus in lambs. | 1969 | 5812440 | |
| influence of ph on uptake of thiabendazole by the nematode haemonchus contortus. | 1969 | 5792783 | |
| the development of haemonchus contortus in vitro. i. the effect of ph and pco2 on the rate of development to the fourth-stage larva. | 1969 | 5769494 | |
| carbon dioxide fixation in haemonchus contortus larvae. | 1968 | 5758884 | |
| spring rise phenomenon in ovine helminthiasis. ii. in stabled ewes experimentally infected with haemonchus contortus. | 1968 | 5750262 | |
| neurosecretory granules in the infective stage of haemonchus contortus. | 1968 | 5740548 | |
| desiccation survival of the infective larva of haemonchus contortus. | 1968 | 5697836 | |
| the occurrence of strains of haemonchus contortus resistant to thiabendazole. | 1968 | 5689434 | |
| first parasitic ecdysis of haemonchus contortus in vitro without stimulation by carbon dioxide. | 1968 | 5652499 | |
| pyruvate kinase in haemonchus contortus larvae. | 1968 | 5651300 | |
| utilization of tricarboxylic acid cycle intermediates by haemonchus contortus larvae. | 1968 | 5651294 | |
| susceptibility of chinchilla spp. to haemonchus contortus. | 1968 | 5641043 | |
| field trials on the efficacy of thiabendazole against haemonchus contortus in west african dwarf forest sheep and goats. | 1967 | 5629277 | |
| strain variation in the response of haemonchus contortus in sheep and goats given phenothiazine: efficacy of n. f. and purified products on pure parasitic infections. | 1967 | 5624592 | |
| modified cilia in sensory organs of juvenile stages of a parasitic nematode. | electron microscopical studies revealed the presence of dendritic nerve processes in sensory organs of the third- and fourth-stage juveniles of haemonchus contortus, which contained structures resembling modified cilia. with few exceptions, the outer circle of fibers consisted of ten doublets, and in place of typical cilia-like central fibers were small microtubules or vesicles varying in number from zero to five. | 1967 | 5611021 |
| a controlled test of methyridine, thiabendazole and parbendazole against haemonchus contortus and trichostrongylus colubriformis in lambs. | 1971 | 5580379 | |
| the seasonal incidence of inhibition of development in haemonchus contortus. | 1971 | 5575482 | |
| further analyses of supernatant fluids from exsheathing infective haemonchus contortus cayugensis larvae. | 1971 | 5568345 | |
| haemonchus contortus infection in sheep: active and passive immunity in sheep given oral iron supplement. | 1971 | 5545464 | |
| the anthelmintic efficiency of clioxanide and rafoxanide against fasciola hepatica and haemonchus contortus in sheep. | 1971 | 5542375 | |
| the response to desiccation of eggs of trichostrongylus colubriformis and haemonchus contortus (nematoda: trichostrongylidae). | 1970 | 5530099 | |
| the efficacy of rafoxanide (3,5-diiodo-3'-chloro-4'-(p-chlorophenoxy) salicylanilide) against haemonchus contortus in sheep. | 1970 | 5499325 | |
| the effects of larval age and cold storage on the ecdysis of infective haemonchus contortus cayugensis larvae. | 1970 | 5483917 | |
| the influence of pco2 and the rate of shaking on the ecdysis of infective haemonchus contortus cayugensis larvae. | 1970 | 5483916 | |
| the inhibitory effect of co2 on the ecdysis of infective haemonchus contortus cayugensis larvae. | 1970 | 5483915 | |
| clioxanide, a new anthelmintic active against fasciola hepatica and haemonchus contortus in sheep. | 1970 | 5481928 | |
| comparative response of two ovine isolates of haemonchus contortus to thiabendazole. | 1970 | 5466489 | |
| the development of haemonchus contortus in vitro. ii. the effect of disulphide-reducing and sulphydryl-blocking reagents on the rate of development to the fourth-stage larvae. | 1970 | 5443872 | |
| strains of haemonchus contortus resistant against benzimidazole anthelmintics. | 1970 | 5442447 | |
| effects of heat and lugol's iodine on the evaluation of ecdysis of infective haemonchus contortus cayugensis larvae. | 1970 | 5420439 | |
| the fate of very large doses of haemonchus contortus and their effect on conditions in the ovine abomasum. | 1970 | 5417934 | |
| the use of clioxanide as an anthelmintic in sheep infected with haemonchus contortus. | 1969 | 5389344 | |
| the dynamics of the host-parasite relationship. vii. the effect of discontinuity of infection onesistance to haemonchus contortus in sheep. | 1969 | 5374703 | |
| gel filtration and disc electrophoresis of a somatic extract and excretions and secretions of haemonchus contortus larvae. | 1969 | 5362575 | |
| the accidental occurrence of haemonchus contortus cobb, 1898 (trichostrongylidae, nematoda) in the stomach of wallago attu. | 1966 | 5299054 | |
| effects of haemonchus contortus inoculation on growth rate, feed efficiency and hematology of feeder lambs. | 1969 | 5189752 | |
| fecal egg output of lambs in relationship to haemonchus contortus burden. | 1971 | 5170631 | |
| plasma and blood volume changes in sheep experimentally infested with haemonchus contortus. | 1971 | 5161395 | |
| cyanocobalamin (vit. b 12 ) absorption in normal and haemonchus contortus infested sheep. | 1971 | 5161391 | |
| haemonchus contortus: genetically determined polymorphism in females. | 1971 | 5157769 | |
| density dependence of the weight of haemonchus contortus adults. | 1971 | 5156170 | |
| the lactic acid dehydrogenases of some parasitic gastro-intestinal nematodes: ascaris suum, oesophagostomum radiatum and haemonchus contortus. | 1971 | 5137637 | |
| effect of concurrent and terminated infections of haemonchus contortus on the development and reproductive capacity of nematodirus battus. | 1971 | 5135638 | |
| morphological characterizatioon of the stage of arrested development of haemonchus contortus in sheep. | 1971 | 5118671 | |
| seasonal change in a balanced polymorphism in haemonchus contortus populations. | 1971 | 5102452 | |
| disease-producing capacity of haemonchus contortus isolates in sheep. | 1972 | 5081482 | |
| enzymatic studies on the exsheathment of haemonchus contortus infective larvae: the role of leucine aminopeptidase. | 1972 | 5075761 | |
| the effect of thiabendazole on fumarate reductase from thiabendazole-sensitive and resistant haemonchus contortus. | 1972 | 5057246 | |
| motility and infectivity of haemonchus contortus larvae after freezing. | 1972 | 5047563 | |
| selection for variations in pathogenicity of haemonchus contortus isolates. | 1972 | 5047117 | |
| host responses of worm-free florida native and rambouillet lambs experimentally infected with haemonchus contortus. | 1972 | 5017872 | |
| exsheathment phenomenon in the infective-stage larvae of haemonchus contortus. | 1972 | 5012525 | |
| haemonchus contortus--haematological changes in lambs during prolonged exposure to daily and weekly doses of infective larvae. | 1972 | 5010456 | |
| haemonchus contortus--the effect on lambs of prolonged exposure to daily and weekly doses of infective larvae. | 1972 | 5010455 | |
| analyses of supernatant fluids from exsheathing infective haemonchus contortus cayugensis larvae. | 1971 | 4998632 | |
| 59fe retention in sheep as a function of age and of artificially induced parasitism with haemonchus contortus. | 1971 | 4996587 | |
| effect of heterologous antibody on haemonchus contortus development in vitro. | 1969 | 4978145 | |
| partial characterization of haemonchus contortus exsheathing fluid. | 1969 | 4974313 | |
| haemonchus contortus: somatic and metabolic antigens of third and fourth larval and adult stages. | 1968 | 4973227 |