| [helminthiases in newly established large-capacity breeding stations for cattle]. | invasions of gastrointestinal nematodes proved to be the most frequent helminthiases in new-established large-capacity herds of cattle according to the results of parasitary examinations of cattle in one locality in the tachov district. the nematodes, especially oesophagostomum spp., haemonchus contortus, cooperia spp., trichostrongylus spp., occurred in animals of all age categories. the ostertagia spp., chabertia ovina, nematodirus spp., bunostomum phlebotomum and trishuris spp. participated i ... | 1978 | 97836 |
| occurrence of gastrointestinal parasites in georgia cattle. | a survey of gastrointestinal nematodes in georgia cattle was conducted from 1968 through 1973 from actual worm counts from viscera of 145 slaughtered beef cattle or from egg counts made from fecal samples from 3,273 beef and 100 dairy cattle. beef cattle were grouped as calves, yearlings, and cows. dairy cattle were grouped as calves, replacement heifers, and cows. results of fecal examinations positive; 99.5, 99.3, 99.6, and 41.2% of the calves, yearlings, drylot calves, and cows, respectively, ... | 1975 | 123711 |
| the control of adult parasitic nematodes of cattle with morantel tartrate. | the anthelmintic efficacy of morantel tartrate at 5mg/kg bodymass was investigated in three separate controlled trials comprising 68 calves. high anthelmintic activity was established against adult haemonchus placei, ostertagia ostertagi, cooperia spp. (c.pertinata and c. punctata), bunostomum phlebotomum and oesophagostomum radiatum. | 1975 | 131197 |
| levamisole: anthelmintic activity in calves following dermal application. | a series of seven experiments designed to evaluate the anthelmintic efficacy of levamisole (1-tetramisole) by dermal application is described. this work involved use of 181 artificially infested calves. the drug was formulated at a concentration of 10% m/v levamisole base in a solvent system promoting dermal absorption and was applied to both sides of the spine in the lumber region at a dose rate of 10 mg levamisole base per kg livemass. a consistent performance was achieved in these investigati ... | 1977 | 144190 |
| trials with rafoxanide. 8. efficacy of an injectable solution against trematodes and nematodes in cattle. | four experiments are described in which the efficacy of an experimental 5% injectable solution of rafoxanide was evaluated against various adult and immature helminths in cattle. subcutaneous injection at a dosage of 3 mg/kg live mass resulted in the following reductions in mean worm burdens: adult fasciola hepatica, 82,6%; adult fasciola gigantica, 99,8% immature paramphistomum microbothrium, 10,1% adult haemonchus placei, 99,6%, third stage h. placei, 73,7%; adult bunostomum phlebotomum, 99,8% ... | 1977 | 144191 |
| occurrence and seasonal behavior of gastrointestinal nematodes infecting maine dairy cattle. | gastrointestinal tracts of 48 yearling maine dairy cattle were examined (8 animals every 2 months) for 1 year. adult and immature nematodes were identified and counted. species recovered were bunostomum phlebotomum, cooperia mcmasteri, cooperia oncophora, cooperia pectinata, cooperia punctata, haemonchus placei, nematodirus helvetianus, oesophagostomum radiatum, ostertagia circumcincta, ostertagia lyrata, ostertagia ostertagi, trichostongylus axei, and trichuris ovis. strongyle parasitism was ob ... | 1977 | 145192 |
| effect of albendazole on gastrointestinal parasites of cattle. | the efficacy of albendazole in removing gastrointestinal nematodes and tapeworms was studied in 16 treated and 16 untreated (control) beef calves. the anthelmintic was administered as an oral drench at a dose level of 5 ml/45.5 kg of body weight (5 mg/kg). percentage of efficacy against the various genera was: trichostrongylus axei, oesophagostomum radiatum, and moniezia-100.0; haemonchus placei, cooperia spp, and trichostrongylus colubriformis - greater than 99.0; ostertagia ostertagi -98.3; an ... | 1977 | 145816 |
| [helminth fauna of syrian cattle]. | in this work the stomach and the small intestine of 34 and the large intestine of 4 more cattle were examined. 91,17% of the examined cattle (31 in 34 animals) had infected the stomach and/or the small intestine by parasites. 14 kinds of nematodes were found. the average intensity of infection of the stomach was higher than that of the small intestine. with the exception of higher infection in 3 stomachs and 2 small intestines the intensity of infection in all other cases was from small to mediu ... | 1979 | 453633 |
| evaluation of oxfendazole against natural infections of gastrointestinal nematodes in nigerian calves. | the efficacy of oxfendazole was tested in naturally infected sokoto-gudali calves at a dosage of 2.8 mg per kg. at this dosage level, oxfendazole showed 100 per cent efficacy against adult and immature forms of haemonchus spp, trichostrongylus spp, bunostomum phlebotomum and oesophagostomum radiatum. although efficacy of 100 per cent was recorded for the adult form of cooperia spp, only 48 per cent reduction was recorded for its immature stages. similarly, a percentage reduction of 75 was record ... | 1979 | 523816 |
| the seasonal incidence of helminth parasites of cattle in the northern transvaal bushveld. | during a period of 14 months two tracer calves per month were slaughtered after one month's exposure to natural helminth infestation on a farm in the northern transvaal bushveld. total parasitic helminth burdens, which were never large, were determined in order to define their seasonal incidence. the gastro-intestinal parasites that were recovered were bunostomum phlebotomum, cooperia pectinata, cooperia punctata, haemonchus placei, oesophagostomum radiatum and trichostongylus spp. of these coop ... | 1979 | 551181 |
| cryopreservation of the infective larvae of the common nematodes of ruminants. | exsheathed infective larvae (l 3) of 19 species of nematodes were tested for infectivity in either sheep or cattle after they had been frozen in 0,9% nacl solution, stored for a relatively short time in the gas phase of liquid nitrogen and subsequently thawed. in addition, 13 of these species were tested after similar storage for up to 18 months. in sheep, haemonchus contortus, ostertagia circumcincta, trichostrongylus axei, trichostrongylus colubriformis, nematodirus spathiger and oesophagostom ... | 1977 | 566412 |
| helminth parasites of beef cattle in the east kimberley and victoria river districts of northern australia. | an investigation into the helminth species present in cattle in the east kimberley and victoria river districts of northern australia was conducted over a 2-year period based on bi-monthly total and differential worm counts in weaner cattle as well as on a post mortem survey of adult cattle sent for slaughter. the most important species found in young cattle were haemonchus placei and cooperia spp. only small numbers of bunostomum phlebotomum, nematodirus spathiger, oesophagostomum radiatum and ... | 1978 | 664015 |
| [natural development of gastrointestinal helminthiasis in calves born during the dry season in guaira, state of são paulo, brazil]. | proceeding with their observations on bovine nematode epidemiology in guaíra, state of são paulo, the authors carried a study on the natural development of nematode infections in crossbred calves born at the dry season. the fecal nematode egg counts per gram (e.p.g.) performed every fortnight were positive at the start, in october, when calves were two months old, and reached the peak when they were five months old; cultures of faeces revealed larvae of cooperia, haemoncus, oesophagostomum and t ... | 1978 | 754678 |
| efficacy of albendazole against gastrointestinal nematodes of cattle. | forty-five calves with artificial and pasture-acquired nematode infections were medicated with albendazole at dose levels of 0, 2.5, 5.0, or 10 mg/kg of body weight. a dose level of 2.5 mg/kg removed at least 99% of adult trichostrongylus axei, trichostrongylus colubriformis, cooperia oncophora, and bunostomum phlebotomum. burdens of haemonchus contortus, strongyloides papillosus, and ostertagia ostertagi were reduced 79, 88, and 97%, respectively. at a dose level of 5.0 mg/kg, at least 95% of a ... | 1976 | 999077 |
| nematodes parasitizing domestic ruminants in afghanistan. | a total of 12 nematode species were determined in the collection recovered from domestic ruminants in afghanistan. ten of them were found for the first time in this region: trichocephalus globulosus, trichostrongylus probolurus, cooperia bisonis, nematodirus spathiger, n. abnormalis, thelazia rhodesi, bunostomum phlebotomum, haemonchus contortus, dictyocaulus filaria and oesophagostomum radiatum. morphological and metrical characteristics of t. globulosus, t. skrjabini and c. bisonis, based on o ... | 1976 | 1034588 |
| trials with rafoxanide. 7. efficacy against fasciola hepatica, haemonchus placei and bunostomum phlebotomum in cattle. | anthelmintic efficacy studies involving 49 cattle either naturally or artificially infested with fasciola hepatica are described. some of the animals were also artificially infested with haemonchus placei and bunostomum phlebotomum. at dosage rates of 3,75 and 5,0 mg/kg live mass rafoxanide was 64,6 and 92,6 per cent effective respectively against adult naturally acquired infestations of f. hepatica. at 7,5 and 10,0 mg/kg it was 37,9 and 55,7 per cent effective against 42 day old liver fluke. at ... | 1975 | 1219107 |
| ultrastructure of the adults of bunostomium phlebotomum (nematoda: ancylostomatidae). | the morphology of the male and female of bunostomum phlebotomum are described based on scanning electron microscope (sem) observations. the attachment of the worms to the small intestinal mucosa and during the copula were observed. structures of the buccal capsule and genital organs were also studied. | 1992 | 1343788 |
| efficacy of cydectin moxidectin 1% injectable against experimental infections of dictyocaulus viviparus and bunostomum phlebotomum superimposed on natural gastrointestinal infections in calves. | twenty male holstein calves averaging 105 kg in weight and naturally infected with gastrointestinal nematodes and small numbers of lungworm and hookworm, were given experimental infections with the two latter species to provide adult and larval stages for anthelmintic evaluation. following random allotment, one group of 10 calves was injected subcutaneously with moxidectin at a dosage of 0.2 mg kg-1 of body weight. a second group of 10 was injected subcutaneously with unmedicated blank vehicle a ... | 1992 | 1413460 |
| efficacy of ivermectin delivered from a sustained-release bolus against inhibited early fourth-stage larvae of ostertagia ostertagi and other nematodes in cattle. | the anthelmintic efficacy of ivermectin (ivm) delivered from a sustained-release (sr) bolus was evaluated against natural infections with gastrointestinal tract nematodes in 12 crossbred beef heifers in spring. the 12 calves were randomly allotted to 2 groups of 6 calves each. group-1 calves were treated with an sr bolus designed to deliver 8 mg of ivermectin/d. group-2 calves were nontreated controls. cattle groups were kept in separate concrete-floored pens (grass hay nutrition) and slaughter ... | 1992 | 1524310 |
| efficacy of abamectin against natural infections of gastrointestinal nematodes and lungworm of cattle with special emphasis on inhibited, early fourth stage larvae of ostertagia ostertagi. | the anthelmintic efficacy of abamectin (avermectin b1) was evaluated against gastrointestinal nematodes, including ostertagia ostertagi inhibited larvae and lungworm, in yearling crossbred beef heifers during late spring. the calves were grazed on contaminated pasture for 10 weeks and then held under conditions free of nematode infection for 3 weeks prior to allotment and treatment on 5 june. thirteen calves were randomly assigned to two groups of six by restricted randomization on body weights; ... | 1992 | 1532875 |
| the seasonal epidemiology of gastrointestinal nematodes in n'dama cattle in the gambia. | from june 1987 to june 1988, a total of 180 n'dama cattle were necropsied to identify and enumerate parasites present, including 39 sick calves and 25 dead calves from local village herds, and 116 adult cattle from a local abattoir. of 175 animals infected with one or more helminths (97%), haemonchus contortus was found in 67% of all necropsied animals, cooperia punctata in 75%, cooperia pectinata in 55%, oesophagostomum radiatum in 71% and bunostomum phlebotomum in 21%. there was a wide range o ... | 1990 | 2238429 |
| the significance of the gastrointestinal parasites of asian buffalo in sri lanka. | buffalo aged 3-15 months on institutional farms and in the villages of an irrigation project were monitored for gastrointestinal nematodes by faecal egg counts over two years. apart from treatment for toxocara vitulorum at 10-16 days of age, no anthelmintics were used. half of the strongylid egg counts were zero and 90% were less than 500 epg of faeces on the institutional farms, and 67% were zero and 97% less than 500 epg in the villages. no problems arose during four years without anthelmintic ... | 1990 | 2284708 |
| the relationships among ecto- and endoparasite levels, class i antigens of the bovine major histocompatibility system, immunoglobulin e levels and weight gain. | natural infestations of the cattle tick boophilus microplus, levels of the buffalo fly haematobia irritants exigua and faecal nematode egg concentrations (bunostomum phlebotomum, cooperia spp., haemonchus placei, oesophagostomum radiatum and trichostrongylus axei) were assessed in 221 belmont red calves during the post-weaning period, when the animals were between 9 and 18 months of age. in addition, the 98 males of this group were challenged with b. microplus larvae on two separate occasions. t ... | 1990 | 2316176 |
| anthelmintic efficacy of febantel paste in naturally infected calves. | the purpose of the present study was to verify results of the lowest dose (5 mg kg-1) of febantel evaluated in an earlier trial in which there were no differences in efficacies of three dose rates (5, 7.5 and 10 mg kg-1 body weight) against natural gastrointestinal nematode infections of cattle. fourteen angus calves (mean weight and age of 155 kg and 525 days, respectively), from the same farm, with relatively heavy (mean of 448 eggs g-1 feces (epg] parasite burdens were selected. after an adju ... | 1990 | 2353426 |
| [the helminth fauna of the gastrointestinal tract of young cattle in northwest germany]. | ten unmedicated animals of a controlled anthelmintic trial were used to analyse the present gastrointestinal helminth fauna of young cattle from the northwest of germany. this survey done in august revealed ostertagia ostertagi to represent the most prevalent and abundant species followed by cooperia oncophora and nematodirus helvetianus. o. lyrata, o. leptospicularis, c. zurnabada, c. punctata, trichostrongylus axei, haemonchus contortus, bunostomum phlebotomum, capillaria bovis and trichuris d ... | 1989 | 2598802 |
| efficacy of oxfendazole against inhibited larvae of ostertagia ostertagi in naturally infected calves in the southern usa. | forty yearling calves were assigned to four equal groups; three of the groups were treated with oxfendazole at dose rates of 6.75 mg/kg, 4.50 mg/kg, or 2.25 mg/kg bodyweight while the fourth group served as an untreated control. the calves were native to north-east mississippi, usa, and harboured natural infections of gastrointestinal nematodes. the study was conducted during july when inhibited early fourth-stage larvae may be found in large numbers after their acquisition in the spring. the ca ... | 1989 | 2728298 |
| controlled dosage titration of febantel paste in naturally parasitized cattle. | a controlled anthelmintic trial was conducted to determine the efficacy of febantel paste (45.5%) at dosages of 2.5, 5.0, 7.5, and 10.0 mg/kg in calves harboring natural gastrointestinal nematode infections. dosages of 5.0, 7.5 and 10.0 mg of febantel/kg of body weight were greater than 96% effective in removing adults of haemonchus contortus, ostertagia spp, cooperia spp, and oesophagostomum radiatum. the 2.5 mg/kg dosage was considered suboptimal because of low efficacy against ostertagia and ... | 1989 | 2802334 |
| use of febantel or ivermectin for treatment of calves with experimentally induced bunostomum phlebotomum infection. | in the first of 2 separate trials, the efficacy of febantel, given at a dosage of 5 mg/kg of body weight, was assessed in calves with 60-day experimentally induced bunostomum phlebotomum infection. ten calves were given febantel paste, and 10 were given the vehicle only. all 20 calves were necropsied 7 days after cessation of treatment. compared with untreated calves, febantel-treated calves harbored 99.4% fewer nematodes. in the second trial, the efficacy of ivermectin, given as a paste formula ... | 1988 | 2972237 |
| efficacy of febantel against naturally acquired gastrointestinal nematodes in calves, and recognition of oesophagostomum venulosum in oregon cattle. | the efficacy of febantel (5.0 mg/kg) against naturally acquired infections of gastrointestinal nematodes was evaluated in a controlled test in calves during the winter. twenty steers were allotted to either control or treatment groups of 10 animals each. seven days after treatment, calves were euthanatized and necropsied for recovery of parasites. febantel was highly effective against adults of ostertagia spp (88.6% efficacy based on median), cooperia spp (97.7%), trichostrongylus spp (98.2%), o ... | 1988 | 3223663 |
| prophylactic efficacy of sustained-release ivermectin against induced nematode infestations in cattle. | the efficacy of sustained-release ivermectin was evaluated against challenge infestations of gastro-intestinal nematodes in a laboratory study involving 12 treated and 12 untreated control cattle. a weighted, orally administered osmotically activated device designed to lodge in the rumeno-reticulum and to deliver ivermectin at a dosage rate of approximately 8 mg/day for a 120-day period, was administered to treated cattle. animals were challenged with infective larvae of bunostomum phlebotomum a ... | 1988 | 3361567 |
| seasonal prevalence of gastrointestinal nematodes of beef calves grazed on irrigated pastures in the lower sacramento valley of california. | two worm-free calves were allowed to graze on irrigated pasture with a naturally infected herd for each of 34 one-month periods from november 1979 to august 1982. after each grazing period, the calves were transferred to a cement-floored pen for 3 weeks and then were euthanatized and necropsied. ostertagia ostertagi and cooperia oncophora were the most prevalent species of nematodes recovered. adults and larvae of ostertagia spp and cooperia spp were most numerous in winter and spring and least ... | 1988 | 3377319 |
| efficacy of oxfendazole against inhibited larvae of ostertagia ostertagi acquired by calves in the spring. | during the spring of 1985, 40 calves grazed pastures known to have high numbers of spring inhibition-prone, infective ostertagia ostertagi larvae. calves were removed from pasture and placed in outdoor pens with concrete floors from 10 days prior to treatment until necropsy 14 days after treatment. ten calves were allocated to each of 4 treatment groups, and oxfendazole was administered to each group by intraruminal injection at dosages of 0, 2.25, 4.5, and 6.75 mg/kg of body weight. efficacies ... | 1988 | 3421523 |
| scanning electron microscopy of bunostomum phlebotomum (railliet, 1900). | live specimens of bunostomum phlebotomum were collected from the small intestine of a calf and processed for scanning electron microscopy using standard methods. this paper describes the surface morphology of adult worms. all these hookworms showed a dorsally bent anterior end with its buccal capsule, which opens antero-dorsally with a pair of chitinous cutting plates on the ventral margin. prominent cervical papillae and a well developed male bursa with a dorsal and 2 lateral lobes, were observ ... | 1986 | 3572958 |
| efficacy of fenbendazole-medicated feed blocks against gastrointestinal nematode infections in calves. | an anthelmintic trial was conducted to determine the efficacy of fenbendazole (fbz) incorporated into two types of feed blocks given daily for 3 or 10 days to calves naturally parasitized with gastrointestinal nematodes. each treated calf consumed 5 mg of fbz/kg of body weight. the fbz was greater than 99% effective in removing adults of haemonchus contortus, ostertagia ostertagi, o lyrata, cooperia punctata, c pectinata, c onchophora, trichostrongylus axei, bunostomum phlebotomum, and oesophago ... | 1987 | 3605803 |
| the efficacy of ivermectin against nematode parasites of white fulani calves. | ivermectin was evaluated for anthelmintic activity in calves naturally infected with gastrointestinal helminths. five of 10 calves were treated subcutaneously with ivermectin at 200 micrograms per kg body weight. one-hundred percent efficacy was indicated against adult and immature haemonchus, trichostrongylus, bunostomum phlebotomum and oesophagostomum radiatum. adult cooperia were also completely eliminated, and a 95.5% reduction was obtained for the immature forms; an 88.7% reduction was obta ... | 1986 | 3754670 |
| efficacy of ivermectin against gastrointestinal nematodes in cattle in south africa. | the efficacy of ivermectin administered at 200 micrograms/kg was evaluated against induced infestations of 5 gastrointestinal nematode species in cattle. results were analysed by the modified non-parametric method and a "a" class (more than 80% effective in more than 80% of the treated animals) was achieved with an oral drench and subcutaneous injection against the third and fourth larval and adult stages of bunostomum phlebotomum, cooperia spp. (c. pectinata and c. punctata), haemonchus placei, ... | 1985 | 3839020 |
| seasonal comparisons of anthelmintic activity of levamisole pour-on in cattle in the usa. | anthelmintic activity of a pour-on formulation of levamisole, applied during warm weather (16 degrees to 36 degrees c) at 10 mg/kg bodyweight, was evaluated in groups of naturally parasitised calves. this activity was compared to that obtained in similar groups of calves treated in the winter (-4 degrees to +7 degrees c). controlled efficacy of the pour-on formulation was determined for each season by comparing mean worm burdens in treated calves sacrificed seven to nine days after treatment to ... | 1986 | 3946069 |
| overwintering of bovine gastrointestinal nematodes in southwestern ontario. | several steers, reared in isolation until approximately six months of age, were placed on a small isolated enclosed pasture from late spring to late fall of 1970, 1971 and 1972. the pasture was left vacant and unused during the winters and early springs. the pasture had been used in previous years by cattle, and in the late spring of 1970 was grazed by cattle know to be passing gastrointestinal nematode eggs in their feces. the steers were slaughtered periodically, and the prevalence of nematode ... | 1974 | 4272963 |
| influence of infection by the hookworm, bunostomum phlebotomum (railliet, 1900), on the concentration of copper in the blood cells and plasma of dairy calves. | | 1965 | 5858846 |
| controlled test of the efficacy of the feed premix formulation of crufomate on the parasites of the gastrointestinal tract and lungs of dairy calves. | activity of the feed premix formulation (m-1839) of crufomate against helminths of the gastrointestinal tract and lungs of cattle was determined in a controlled test. eight calves were treated and 7 were nontreated. the dosage rate of crufomate was 17 mg of active drug/kg of body weight daily for 3 consecutive days. removal activity was high against mature cooperia oncophora (99%) and c punctata (96%) and immature cooperia spp (87%). removal of mature ostertagia ostertagi was 68%. the removal of ... | 1982 | 6213184 |
| anthelmintic efficacy of fenbendazole against the bovine hookworm bunostomum phlebotomum. | | 1983 | 6226223 |
| experimental and natural infection of calves with bunostomum phlebotomum. | an experiment was conducted to determine the efficiency of a method of experimental infection of weaner beef calves with bunostomum phlebotomum and to compare such infection with that established by natural infection. six calves, maintained on a concrete-floored pen, were inoculated with b. phlebotomum l3 by placing the larval inocuulum, in small volume, in the outer chamber of the ear while the animal was restrained for 18 min. inoculation doses of 20, 30, 40, 50, 60, and 80 thousand l3 were us ... | 1983 | 6229089 |
| 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 |
| controlled and clinical evaluations of the anthelmintic activity of a levamisole pour-on formulation against gastrointestinal nematodes in cattle. | beef-type calves (n = 107) with naturally occurring helminth infections were used in a series of 3 controlled experiments to study the anthelmintic activity of a new pour-on formulation of levamisole. in the 1st experiment, the efficacy of a single treatment of levamisole pour-on at a rate of 10 mg/kg of body weight was determined, using a placebo pour-on in a similar volume as a control. in the 2nd experiment, calves were treated with levamisole pour-on at doses 0 (nontreated control), 7.5, 10, ... | 1984 | 6377988 |
| persistent anthelmintic effect of ivermectin in cattle. | the persistent anthelmintic effect of ivermectin given subcutaneously at 200 mcg/kg was evaluated against induced infections of haemonchus placei, ostertagia ostertagi, cooperia spp. (c. pectinata and c. punctata), bunostomum phlebotomum and oesophagostomum radiatum in cattle. forty-four friesian bull calves raised under worm-free conditions were restrictively randomized to one untreated control group and 3 ivermectin treated groups of equal size according to mass. animals in the different treat ... | 1983 | 6689429 |
| [repeated dehelminthization and its effect on the course of the natural infestation, of sheep by roundworms]. | long-continued use of levamizole for the control of gastrointestinal roundworms in sheep kept on pasture showed that the discrepancy in the results obtained in experiments and in the terrain is associated with the physiology of host and parasites. in practical use in the terrain, the preparation had an 85% effect in one case; otherwise the average effect was 61.1% and persisted five to six weeks in all flocks including those in which the animals were treated five times a year. treatment performe ... | 1981 | 6794215 |
| importance of gastro-intestinal helminths in calves in papua new guinea. | gastro-intestinal nematodes caused poor growth rates and high mortality in undrenched calves when weaning preceded the wet season. cooperia punctata and haemonchus placei were the dominant species throughout the year with worm burdens and pasture contamination being highest during the wet season and lowest in the dry season. histotropic stages occurred throughout the year in weaner calves but with a clear peak during the wet season. the development of host resistance against the most important w ... | 1983 | 6868131 |
| the seasonal incidence of helminth parasites of cattle in the eastern transvaal lowveld. | two helminth-free tracer calves were exposed to natural helminth infestation of a farm in the eastern transvaal lowveld for one month. on a nearby farm calves grazed with the herd for at least 3 months before slaughter so that the cumulative worm burden could be determined. the gastro-intestinal parasites increased markedly after rain. the major species and order or prevalence were: cooperia pectinata, cooperia punctata, haemonchus placei and oesophagostomum radiatum; minor species were bunostom ... | 1982 | 7175905 |
| oxfendazole: anthelmintic activity in calves artificially infected with six species of nematodes and in calves naturally infested with tapeworms. | in a series of 5 trials, in which 115 artificially infected calves were used, larval anthelmintic tests were done to assess the activity of oxfendazole at 4, 5 mg/kg against all 3 parasitic stages of 6 species of namatodes. an efficacy of over 98% was demonstrated against the 4th stage larvae (l4), 5th and adult stages of haemonchus placei, ostertagia ostertagi, cooperia pectinata, bunostomum phlebotomum and oesophagostomum radiatum and the 3rd larval stage (l3) of h. placei and c. pectinata. ag ... | 1982 | 7175907 |
| the efficacy of fenbendazole at a dosage rate of 5 mg/kg against nematode infestations in cattle. | the anthelmintic efficacy of fenbendazole, dosed to artificially infested cattle at 5 mg/kg live mass was determined against immature and adult haemonchus placei. ostertagia ostertagi, cooperia spp., bunostomum phlebotomum and oesophagostomum radiatum. at this dosage rate, fenbendazole was more than 80% effective in more than 80% of the animals treated against the abovementioned nematodes. the only exception was against the third-stage larvae of b. phlebotomum when it fell to more than 60% effec ... | 1981 | 7265100 |
| comparative efficacy of levamisole, thiabendazole and fenbendazole against cattle gastrointestinal nematodes. | efficacy of two older anthelmintics, levamisole and thiabendazole, was compared with a newer benzimidazole, fenbendazole, against naturally acquired gastrointestinal nematode infections in cattle superimposed with experimental infections of bunostomum phlebotomum and dictyocaulus viviparus. twenty-four crossbred beef heifers of 7-9 months of age and 152 kg in average weight were randomly allocated to four groups of six calves. the cattle grazed on pastures contaminated with larvae of gastrointes ... | 1995 | 7676603 |
| antigenic analysis of dictyocaulus viviparus by use of test-positive bovine sera. | an antigen extract of dictyocaulus viviparus was analyzed by use of sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and the antigen-recognition patterns of serum antibody from cattle not infected, cattle infected with d viviparus, and cattle with unknown history of d viviparus were analyzed by the use of elisa and western blotting techniques. cross-reactive antibody-recognition patterns were determined by comparing western blots of d viviparus-positive sera with blots of d viviparus-n ... | 1994 | 7998700 |
| activity of doramectin against nematode endoparasites of cattle. | a series of 28 controlled anthelmintic studies, involving 634 cattle, was conducted throughout north america and europe to evaluate the efficacy of doramectin against a broad range of gastrointestinal parasitic nematode species and lungworms in naturally and experimentally infected animals. within each study, one or two groups were treated with doramectin at 200 micrograms kg-1 and another group received no drug treatment. worm burdens were estimated by standardised techniques, and efficacy asse ... | 1993 | 8236735 |
| efficacy of abamectin against nematodes in cattle. | eight controlled trials were conducted, using 96 cattle of european breeds, to evaluate the efficacy of abamectin against natural and artificially acquired infections of adult and fourth-stage larvae of all the economically important gastrointestinal nematodes and lungworms in germany and the united kingdom. half the animals were treated on one occasion with abamectin at a dose of 200 micrograms/kg bodyweight given subcutaneously while the other half remained untreated. worms were counted 14 or ... | 1993 | 8442334 |
| epizootiology of ostertagia ostertagi in cow-calf production systems in the american midwest. | the most common gastrointestinal nematodes found in cattle in the midwest are ostertagia ostertagi and cooperia oncophora. other parasites include haemonchus placei, bunostomum phlebotomum and nematodirus helvetianus. parasite numbers are generally low in this region, as indicated by fecal egg counts and tracer calf worm recoveries, and the numbers of parasites decrease as one travels farther north. this decrease in parasite numbers also corresponds to a similar reduction in the prevalence of cl ... | 1993 | 8484220 |
| helminth parasites and hypobiosis of nematodes in n'dama cattle during the dry season in the gambia. | three series of necropsies of cattle were performed, corresponding to early dry season, approximately 1 month after the last rains (november, n = 6), mid dry season (february, n = 6) and end dry season (april, n = 3). eggs per gram of faeces (epg) were determined just before necropsy. three trematodes (fasciola gigantica, schistosoma spp. and paramphistomatids) and 11 nematodes were identified from cattle, with the prevalence rate varying from 6.7% to 100%. haemonchus contortus was the most abun ... | 1995 | 8644452 |
| efficacy of moxidectin pour-on against gastrointestinal nematodes and dictyocaulus viviparus in cattle. | twenty crossbred beef heifer calves were used for an efficacy evaluation of 0.5% moxidectin pour-on against gastrointestinal nematodes and dictyocaulus viviparus. the latter parasite and bunostomum phlebotomum were the target species. the calves were exposed to natural infection on pasture from late september to december 22. additionally, all calves were experimentally infected with b. phlebotomum at 71 and 29 days before treatment and with d. viviparus at 29 days before treatment. the 20 calves ... | 1996 | 8893482 |
| efficacy of moxidectin 0.5% pour-on against naturally acquired nematode infections in cattle. | the efficacy of 0.5% moxidectin pour-on at two dosages was evaluated in 30 cattle with naturally acquired gastrointestinal nematode infections. the cattle were ranked according to pretreatment fecal egg counts and body weights, and were randomly assigned from replicates to three treatment groups. the mean number of trichostrongyle eggs in pretreatment fecal samples did not differ among the groups. groups i and ii received 0.5% moxidectin pour-on at dosages of 0.25 mg moxidectin per kg body weigh ... | 1996 | 8916402 |
| seasonal pattern of inhibition of ostertagia ostertagi in calves in northeast mississippi. | the composition of, and seasonal changes in, populations of gastrointestinal parasites of calves in northeast mississippi were determined for 10 months post-weaning. after weaning on 15 october, 20 mixed breed beef steers were grazed together on a 4 ha fescue/bermudagrass pasture. from november through august of the following year, two of the calves were removed each month for necropsy and counting of gastrointestinal nematodes. eight species of worms were found: haemonchus placei, ostertagia os ... | 1996 | 8983154 |
| efficacy of a pour-on formulation of eprinomectin (mk-397) against nematode parasites of cattle, with emphasis on inhibited early fourth-stage larvae of ostertagia spp. | to evaluate efficacy of topically applied eprinomectin against inhibited early fourth-stage larvae (il4) of ostertagia spp in calves. | 1997 | 9099383 |
| host specificity of sheep and cattle nematodes in são paulo state, brazil. | the trial was carried out to investigate parasite host specificity and to analyse the dynamics of infection with nematodes parasitizing sheep and cattle raised together or separately in são paulo state, brazil, and, also to clarify doubts about the systematics of species of the genus haemonchus on the basis of cytological and morphological studies. ten steers and 32 ewes were randomly assigned to three paddocks (p), as follows: p1, 5 steers; p2, 5 steers and 16 ewes; and p3, 16 ewes. the animals ... | 1997 | 9477496 |
| epidemiology of mecistocirrus digitatus and other gastrointestinal nematode infections in cattle in mindanao, philippines. | over a period of 14 months, faecal and serum samples were collected monthly from cattle of 1 to 30 months old on three ranches (20-25 animals ranch-1 sample-1) in mindanao, philippines. individual faecal egg counts, serum pepsinogen levels and mecistocirrus digitatus specific antibodies were determined, and infective larvae from pooled faecal samples were examined. post mortem worm counts were carried out on tracer calves (n = 16) that had been kept for 30 days with the herds on two of the ranch ... | 1998 | 9493308 |
| seasonal infection pattern of gastrointestinal nematodes of beef cattle in minas gerais state--brazil. | tracer calves were used to assess the seasonality of infections of gastrointestinal parasites in beef cattle extensively raised at a farm in the state of minas gerais, brazil. tracer calves acquired infections during all months of the year, however, highest worm burdens were observed in the rainy season. the following nematode species were recovered from tracer calves: cooperia punctata, c. spatulata, c. pectinata, haemonchus similis, h. placei, oesophagostomum radiatum, trichostrongylus colubri ... | 1998 | 9561708 |
| demonstration of shared carbohydrate epitopes in intestinal proteins of some bovine gastrointestinal nematodes. | the presence of shared carbohydrate intestinal epitopes in bovine gastrointestinal nematodes was demonstrated. proteins were extracted from the intestinal tissue of a laboratory strain of adult haemonchus placei and used to produce monoclonal antibodies (mab). analysis of this detergent extract by sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed 7-9 bands ranging from approximately 39 to 298 kda. the mabs reacted with periodate-sensitive epitopes and, in western blots, recogniz ... | 1998 | 9645850 |
| efficacy of topically administered doramectin against eyeworms, lungworms, and gastrointestinal nematodes of cattle. | to evaluate efficacy of topically administered doramectin against eyeworms, lungworms, and gastrointestinal nematodes of cattle. | 1999 | 10376888 |
| nematode parasites of adult dairy cattle in the netherlands. | abomasa, blood samples and faecal samples for examination of nematode infections were collected from 125 dairy cows during the period november 1997-october 1998. of these, 12 had no grazing history and were, therefore, excluded from this study. from the remaining 113, 88.5% had nematode eggs in the faeces. larval identification of the positive cultures showed that ostertagia spp. larvae were most frequent (97%), followed by trichostrongylus spp. (29%), oesophagostomum spp. (23%), cooperia puncta ... | 2000 | 10799842 |
| [experimental course of bunostomum phlebotomum invasion in heifers]. | | 1965 | 14316578 |
| gastrointestinal nematodes in indigenous zebu cattle under pastoral and nomadic management systems in the lower plain of the southern highlands of tanzania. | this study aimed to determine the prevalence and intensity of gastrointestinal nematode infections in indigenous zebu cattle in the lower plain (lowland zone) of the southern highlands of tanzania. gastrointestinal tracts were randomly purchased at the iringa regional abattoir and at kihesa and ipogolo slaughter slabs in different seasons of the year. the contents of the abomasum, small intestine and large intestine were processed separately to recover the worms. the results indicated that 140 o ... | 2003 | 14509451 |
| studies on bovine gastrointestinal parasites xvi. some results of feeding small amounts of phenothiazine on pure infections of the hookworm bunostomum phlebotomum. | | 1950 | 14804221 |
| the role of rabbits in the biology of some gastrointestinal parasites infecting sheep. | twelve rabbits (buscat strain) were classified into 4 gs (3 rabbits each). the first three groups were experimentally infected with the infective 3rd stage larvae of bunostomum phlebotomum, trichostrangylus colubriformis and cooperia onchophora, respectively. the 4th g was used as a control. the faecal examination until slaughtering time (21 days post infection) of all gs did not show any nematode eggs. the microscopic examination of the gastrointestinal canal contents and mucosal scrapings of a ... | 2005 | 16333891 |
| studies on bovine gastro-intestinal parasites; additional infection experiments with the hookworm (bunostomum phlebotomum) in the calf. | | 1949 | 18153103 |
| the mitochondrial genomes of ancylostoma caninum and bunostomum phlebotomum--two hookworms of animal health and zoonotic importance. | hookworms are blood-feeding nematodes that parasitize the small intestines of many mammals, including humans and cattle. these nematodes are of major socioeconomic importance and cause disease, mainly as a consequence of anaemia (particularly in children or young animals), resulting in impaired development and sometimes deaths. studying genetic variability within and among hookworm populations is central to addressing epidemiological and ecological questions, thus assisting in the control of hoo ... | 2009 | 19210793 |
| creeping eruption caused by the larvae of the cattle hookworm bunostomm phlebotomum. | | 1947 | 20270657 |
| studies on the life-history of bunostomum phlebotomum (railliet, 1900), a hookworm parasite of cattle. | | 1946 | 20276058 |
| some observations on the bionomics of bunostomum phlebotomum, a hookworm of cattle. | | 1946 | 20276059 |
| infection experiments with the hookworm (bunostomum phlebotomum) in calves. | | 1946 | 20277750 |
| immunological phenomena in the calf, following experimental infection with bunostomum phlebotomum. | | 1946 | 20283527 |
| additional infection experiments with the hookworm, bunostomum phlebotomum, in the calf. | | 1947 | 20340881 |
| some observations on a disease of zebu cattle associated with infestation by the hookworm, bunostomum phlebotomum. | | 1946 | 20999315 |
| characterization of bunostomum trigonocephalum and bunostomum phlebotomum from sheep and cattle by internal transcribed spacers of nuclear ribosomal dna. | in the present study, samples representing bunostomum trigonocephalum and bunostomum phlebotomum from sheep and cattle in heilongjiang province, china, were characterized and grouped genetically by the first (its-1) and second (its-2) internal transcribed spacers (its) of nuclear ribosomal dna (rdna). the rdna region including the its-1, 5.8s, its-2, and flanking 18s and 28s rdna sequences was amplified by polymerase chain reaction (pcr), then sequenced and compared with that of other members of ... | 2010 | 21094506 |
| anthelmintic activities of chloroform and methanol extracts of buchholzia coriacea engler seed. | the anthelmintic potentials of the chloroform and methanol extracts of buchholzia coriacea engler seed were investigated. in folklore medicine, b. coriacea (capparidaceae) is believed to be useful in the treatment of various kinds of ailments and diseases. at doses of 10 mg/kg, 25 mg/kg and 50 mg/kg, the extracts were tested against eudrilus eugeniae (earthworm) and bunostomum phlebotomum (cattle hookworm). the extracts exhibited dose-dependent anthelmintic effects on the earthworms and hookworm ... | 2011 | 21344210 |
| therapeutic efficacy of eprinomectin extended-release injection against induced infections of developing (fourth-stage larvae) and adult nematode parasites of cattle. | the therapeutic efficacy of eprinomectin in an extended-release injection (eri) formulation was evaluated against induced infections of developing fourth-stage larval or adult gastrointestinal and pulmonary nematodes of cattle in a series of six studies under two identical protocols (three each for developing fourth-stage larvae or adults) conducted in the usa, germany or the uk (two studies at each location, one per stage). each study initially included 16 nematode-free cattle. the cattle were ... | 2012 | 23273929 |
| nematode burdens of pastured cattle treated once at turnout with eprinomectin extended-release injection. | the efficacy of eprinomectin in an extended-release injection (eri) formulation was evaluated against infections with third-stage larvae or eggs of gastrointestinal and pulmonary nematodes in cattle under 120-day natural challenge conditions in a series of five studies conducted in the usa (three studies) and in europe (two studies). for each study, 30 nematode-free (four studies) or 30 cattle harboring naturally acquired nematode infections (one study) were included. the cattle were of various ... | 2012 | 23273928 |
| an eprinomectin extended-release injection formulation providing nematode control in cattle for up to 150 days. | a series of 10 dose confirmation studies was conducted to evaluate the persistent activity of an extended-release injectable (eri) formulation of eprinomectin against single point challenge infections of gastrointestinal and pulmonary nematodes of cattle. the formulation, selected based on the optimal combination of high nematode efficacy, appropriate plasma profile, and satisfactory tissue residue levels, includes 5% poly(d,l-lactide-co-glycolic)acid (plga) and is designed to deliver eprinomect ... | 2012 | 23273777 |
| activity of ivermectin long-acting injectable (ivomec(®) gold) in first-season grazing cattle exposed to natural challenge conditions in germany. | the persistent activity of ivermectin long-acting injection (ivm lai; ivomec® gold, merial; 3.15% ivermectin w/v) against nematode infections of cattle was evaluated under natural challenge conditions. seventy nematode-free brown swiss calves were blocked by pre-treatment bodyweight and allocated randomly to seven groups of 10 animals each: saline (control) at 1 ml/50 kg bodyweight once on day 0 or ivm lai at 1 ml/50 kg bodyweight (630 mcg ivm/kg) on either days 0, 7, 14, 21, 28, or 35. after ho ... | 2015 | 25280515 |
| comparative analyses of the complete mitochondrial genomes of the two ruminant hookworms bunostomum trigonocephalum and bunostomum phlebotomum. | bunostomum trigonocephalum and bunostomum phlebotomum are blood-feeding hookworms of sheep and cattle, causing considerable economic losses to the live stock industries. studying genetic variability within and among hookworm populations is critical to addressing epidemiological and ecological questions. mitochondrial (mt) dna is known to provide useful markers for investigations of population genetics of hookworms, but mt genome sequence data are scant. in the present study, the complete mitocho ... | 2014 | 24625354 |
| reevaluation of efficacy against nematode parasites and pharmacokinetics of topical eprinomectin in cattle. | a study was conducted to confirm the efficacy of topical eprinomectin against nematodes and to evaluate the pharmacokinetics in cattle prevented from having physical contact with other cattle and from self-grooming. sixteen male brown swiss calves were infected with larvae of recently isolated nematode parasites. inoculation was scheduled so that the nematodes were expected to be adults at the time of treatment. animals were blocked based on pretreatment body weight and randomly allocated to the ... | 2012 | 22638921 |