Suspected ivermectin resistance in a south‐east Queensland Parascaris equorum population          下载免费PDF全文

A Beasley  G Coleman  AC Kotze 《Australian veterinary journal》2015,93(9):305-307

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Avian influenza in Australia: a summary of 5 years of wild bird surveillance          下载免费PDF全文

VL Grillo  KE Arzey  PM Hansbro  AC Hurt  S Warner  J Bergfeld  GW Burgess  B Cookson  CJ Dickason  M Ferenczi  T Hollingsworth  MDA Hoque  RB Jackson  M Klaassen  PD Kirkland  NY Kung  S Lisovski  MA O'Dea  K O'Riley  D Roshier  LF Skerratt  JP Tracey  X Wang  R Woods  L Post 《Australian veterinary journal》2015,93(11):387-393

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Efficacy of topically administered doramectin against eyeworms, lungworms, and gastrointestinal nematodes of cattle.     

S E Marley  E F Illyes  D S Keller  T R Meinert  N B Logan  M O Hendrickx  G A Conder 《American journal of veterinary research》1999,60(6):665-668

OBJECTIVE: To evaluate efficacy of topically administered doramectin against eyeworms, lungworms, and gastrointestinal nematodes of cattle. ANIMALS: 400 cattle (20 cattle in each of 20 trials). PROCEDURE: Trials were conducted in North America; natural and experimentally induced infections were used. In each trial, cattle were allocated randomly to control (placebo [saline [0.9% NaCl] solution at 1 ml/10 kg of body weight] or untreated; n = 10) or doramectin-treated (500 microg/kg of body weight; 10) groups. Treatments were applied in a single passage along the midline of the back, from the withers to the tailhead. Cattle were euthanatized > or =14 days after treatment, and worm burdens were determined by use of standard techniques. RESULTS: Efficacy of doramectin was > or =95.3% against adults of Thelazia gulosa, T skrjabini, Dictyocaulus viviparus, Haemonchus contortus, H placei, Ostertagia lyrata, O ostertagi, Trichostrongylus axei, Bunostomum phlebotomum, Capillaria spp, Cooperia oncophora, C pectinata, C punctata, C spatulata, C surnabada, Nematodirus spathiger, Strongyloides papillosus, T colubriformis, Oesophagostomum radiatum, and Trichuris spp. Efficacy was 95.1% against fourth-stage larvae of D viviparus, H placei, O lyrata, O ostertagi, T axei, C oncophora, C punctata, C spatulata, C surnabada, N helvetianus, T colubriformis, O radiatum, and Trichuris spp. In addition, efficacy against inhibited fourth-stage larvae of O ostertagi and Ostertagia spp was > or =98.1%. CONCLUSIONS AND CLINICAL RELEVANCE: A single topical application of doramectin pour-on was efficacious against a broad range of nematode species in cattle.  相似文献   

Persistent efficacy of doramectin injectable against artificially induced infections with Cooperia punctata and Dictyocaulus viviparus in cattle.     

B E Stromberg  B W Woodward  C H Courtney  W E Kunkle  E G Johnson  G L Zimmerman  L A Zimmerman  S E Marley  D S Keller  G A Conder 《Veterinary parasitology》1999,83(1):49-54

Three studies were conducted to evaluate the persistent efficacy of doramectin injectable solution against experimental challenges with infective larvae of Cooperia punctata and Dictyocaulus viviparus. In each study, four groups of ten randomly-assigned calves, negative for trichostrongyle-type eggs on fecal examination, were treated subcutaneously in the midline of the neck with saline (1 ml/50 kg) on Day 0 or doramectin (200 microg/kg = 1 ml/50 kg) on Day 0, 7, or 14. Two additional calves from the same pool of animals were randomly assigned as larval-viability monitors and received no treatment. On Days 14-28, approximately 1000 and 50 infective larvae of Cooperia spp. and D. viviparus, respectively, were administered daily by gavage to each animal in Groups T1-T4. On Day 28, the two larval-viability monitor calves were inoculated in a similar manner with a single dose of approximately 30000 and 2000 larvae of Cooperia spp. and D. viviparus, respectively. Equal numbers of calves from each treatment group were killed on Days 42-45, as well as the two viability monitor animals to enumerate worm numbers. A 2% or 5% aliquot of small intestinal contents and washings were examined for worm quantification and identification, while 100% of the lung recoveries were quantified and identified. For each study and across the three studies, geometric mean worm recoveries for each treatment group were calculated from the natural log transformed data (worm count + 1) and were used to estimate percentage reduction. In the three studies, doramectin injectable solution was 97.5% efficacious against lungworms for up to 28 days and was 99.8% efficacious in reducing infection resulting from challenge with infective larvae of C. punctata for at least 28 days post-treatment.  相似文献   

First documented pest outbreak of the herbivorous springtail Sminthurus viridis (Collembola) in Europe          下载免费PDF全文

F. V. Crotty  R. Fychan  C. M. Benefer  D. Allen  P. Shaw  C. L. Marley 《Grass and Forage Science》2016,71(4):699-704

Sminthurus viridis (Collembola: Sminthuridae) is a native of grasslands across Europe and feeds preferentially on clover (Trifolium spp.) and lucerne (Medicago sativa), although its abundance does not normally reach damaging pest levels (as occurs in Australasia). This research note describes the first quantitative assessment of a pest outbreak of this springtail in Europe, which occurred within an existing experiment investigating the effects of cultivation practices on forage establishment. Using sticky traps to assess the incidence of S. viridis, we found a significant outbreak consisting of catches that were 10‐fold greater than background levels in nearby undamaged fields. Within the experimental area, lucerne established by direct drilling with herbicide had the highest incidence (105 (± 4·9) individuals per trap) compared to other treatments [79 (± 3·9)]. Results are discussed in terms of how cultivation practice may have imbalanced the ecosystem; for example, herbicide use may have diminished potential refugia for predators during forage establishment. This paper highlights the potential of a currently innocuous, widely established invertebrate to become present at damaging levels in agricultural crops.  相似文献   

High susceptibility and low resistance allele frequency of Chrysodeixis includens (Lepidoptera: Noctuidae) field populations to Cry1Ac in Brazil          下载免费PDF全文

Silvia AC Yano  Alexandre Specht  Flávio Moscardi  Renato A Carvalho  Patrick M Dourado  Samuel Martinelli  Graham P Head  Daniel R Sosa‐Gómez 《Pest management science》2016,72(8):1578-1584

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The effects of birdsfoot trefoil (Lotus corniculatus) and chicory (Cichorium intybus) when compared with perennial ryegrass (Lolium perenne) on ovine gastrointestinal parasite development, survival and migration     

Marley CL  Cook R  Barrett J  Keatinge R  Lampkin NH 《Veterinary parasitology》2006,138(3-4):280-290

Two experiments were conducted to investigate the effects of birdsfoot trefoil and chicory on parasitic nematode development, survival and migration when compared with perennial ryegrass. In experiment one, sheep faeces, containing 10,385 Cooperia curticei eggs were added to 25 cm diameter pots containing birdsfoot trefoil, chicory or ryegrass, and the pots maintained under optimal conditions for nematode parasite development. Replicate pots of each forage type were destructively sampled on day 8, 16, 20, 28 and 37 to collect the nematode larvae. When forages were compared on a dry matter basis, by day 16 there were 31% and 19% fewer larvae on birdsfoot trefoil and chicory than on ryegrass, respectively (P<0.01). In the second experiment, replicate 1m(2) field plots of birdsfoot trefoil, chicory and ryegrass were sub-sampled on day 14, 21, 35 and 49 for larval counts following the application of sheep faeces containing 585,000 Teladorsagia circumcincta eggs to each plot on day 0. Results showed there were a minimum of 58% and 63% fewer infective stage parasitic larvae on birdsfoot trefoil and chicory, respectively, compared with ryegrass on day 14 and 35 when forages were compared on a forage dry matter, plot area sampled and leaf area basis (P<0.01). Overall, these results indicate that the number of infective stage larvae on birdsfoot trefoil and chicory pasture was reduced by the effect of their sward structure on the development/survival/migration of ovine parasitic nematodes. These effects may be one of the ways in which these forages may affect parasitic infections in grazing livestock.  相似文献   

Methods for measuring soil velocities caused by a sweep     

H.Mark Hanna  Stephen J. Marley  Donald C. Erbach  Stewart W. Melvin 《Soil & Tillage Research》1994,28(3-4):315-328

A field experiment was conducted to measure surface soil velocity and to determine the relation between soil aggregate velocities at the tool surface and at the soil surface.

A technique incorporating use of both a video camcorder and wood blocks was developed to measure surface soil velocity. Soil velocity direction at the tool surface was measured from scratch marks on the tool. Velocity measurements were made for three sweeps with different rake angles operated at three speeds and two depths.

Surface soil moved in either of two modes: V-flow (upward and laterally in the shape of one leg of the letter V) or snowplow (initially moving upward and subsequently being buried in a wave of soil). Surface soil velocities were uncorrelated with velocities on the tool surface, indicating that soil flow paths over the sweep were not parallel. The ratio of vertical to lateral soil flow at the tool surface increased with larger rake angle and was greater than the ratio at the soil surface. At the soil surface, vertical velocity was greater near the nose than near the wing tip and velocity parallel to the travel direction increased with increased speed and rake angle.  相似文献   

Effect of phosphonoformic acid in the development of bovine embryos in vitro     

Marley MS  Givens MD  Stringfellow DA  Galik PK  Riddell KP 《Veterinary therapeutics : research in applied veterinary medicine》2006,7(2):156-166

This research evaluated the ability of phosphonoformic acid to inhibit bovine herpesvirus 1 (BHV-1) in cumulus cells commonly used in co-culture with bovine in vitro-produced embryos. At 200 and 400 microg/ml, phosphonoformic acid inhibited 4 logs of BHV-1. Subsequently, phosphonoformic acid (200 and 400 microg/ml) added to both in vitro fertilization and culture medium resulted in a decrease in the proportion of developed blastocysts, and the number of cells per blastocyst was lower in the treated embryos. Therefore, while phosphonoformic acid can effectively inhibit replication of BHV-1 in co-culture cells, it also inhibits development of in vitro-produced bovine embryos.  相似文献   

Molecular characteristics of granulosa and cumulus cells and oocyte competence in Nelore cows with low and high numbers of antral follicles          下载免费PDF全文

CO Rosa  LSR Marinho  PRA da Rosa  MP De Cesaro  PA Lunardelli  KC Silva‐Santos  AC Basso  V Bordignon  MM Seneda 《Reproduction in domestic animals》2018,53(4):921-929

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