Acanthocephalan infection and sparganosis in a green tree snake (Dendrelaphis punctulata)     

AG Hill  PW Ladds  DM Spratt 《Australian veterinary journal》2014,92(9):362-364

Acanthocephalan and spargana parasites were identified within a body wall mass during exploratory surgery in a wild green tree snake. Acanthocephalan parasites have not previously been reported in this species. Surgical excision, the treatment of choice, could not be achieved because of the extensive infiltration of the coelomic cavity.  相似文献   

A serotypic survey and cross-protection test of North American field isolates of Yersinia ruckeri     

D. H. McCARTHY  K. A. JOHNSON 《Journal of fish diseases》1982,5(4):323-328

Abstract. A serological study of 23 North American strains of Yersinia ruckeri showed that they were comprised essentially of one serotype–the classical 'Hager-man' serotype. Cross-protection tests showed that rainbow trout could be protected from challenge with various strains. Continuous surveillance of enteric redmouth disease and further work including DNA binding studies is necessary to determine the precise significance of the other related serotypes.  相似文献   

Aeromonas hydrophila B-haemolysin: purification and examination of its role in virulence in 0-group channel catfish, Ictalurus punctatus (Rafinesque)     

R. L. THUNE  MAUREEN C. JOHNSON  T. E. GRAHAM  R. L. AMBORSKI 《Journal of fish diseases》1986,9(1):55-61

Abstract. A single step procedure for purification of B-haemolysin from Aeromonas hydrophila is described which recovered 94% of the haemolytic activity with a sixfold increase in specific activity. Toxicity of haemolysin in 0-group channel catfish was 0–6 mg of purified protein per gram offish. Of six strains of A. hydrophila evaluated for differential toxin production and virulence in 0-group channel catfish, three B-haemolysin-deficient strains were virulent while three B-haemolysin-producing strains were avirulent.  相似文献   

Identification and characterisation of an H7N3 influenza A virus from an outbreak of virulent avian influenza in Victoria   总被引：1，自引：0，他引：1  

PW SELLECK  LJ GLEESON  FT HOOPER  HA WESTBURY  E. HANSSON 《Australian veterinary journal》1997,75(4):289-292

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The prevalence of itchmite, Psorergates ovis, among sheep flocks with a history of fleece derangement     

PW JOHNSON  JW PLANT  JC BORAY  SC BLUNT  PJ NICHOLLS 《Australian veterinary journal》1990,67(4):117-120

An investigation of sheep flocks in the main sheep raising areas of New South Wales showed that the itchmite Psorergates ovis was frequently associated with fleece derangement. In 26 of the 41 flocks examined, P. ovis was the only ectoparasite detected. P. ovis and the sheep body louse Damalinia ovis, were found in 5 flocks. No external parasites were found on sheep examined from the 10 remaining flocks. The type of fleece derangement most frequently recorded was rubbing which in some cases was combined with areas of chewed fleece. Among flocks, there were positive relations between the prevalence of fleece derangement and prevalence of itchmite or scurf and between itchmite count and mean scurf score. Within flocks, itchmite infested sheep or sheep with scurf had higher prevalences of fleece derangement than sheep on which no mites or no scurf were found. Itchmite infested sheep had a higher prevalence of scurf than those with no detectable mite infestation. There were no significant differences in itchmite populations or fleece derangement between untreated flocks and flocks treated with synthetic pyrethroids, organophosphates or arsenic and rotenone.  相似文献   

Partial Carpal Arthrodesis for Third Degree Carpal Sprains: A Review of 45 Carpi     

R. L. WILLER DVM    K. A. JOHNSON MVSc  PhD  FACVSc  DiplomateACVs    T. M. TURNER DVM  D. L. PIERMATTEI DVM  PhD  DiplomateACVs 《Veterinary surgery : VS》1990,19(5):334-340

The efficacy of partial carpal arthrodesis was evaluated retrospectively in 39 dogs (45 carpi) with severe sprains of the middle carpal joints, the carpometacarpal joints, or both. The carpometacarpal joint was the most frequently injured joint. Jumping or falling from heights was the cause of injury in 49% of these animals. Of the 25 owners who responded to a mailed questionnaire (mean follow-up, 32 months), all stated their animal had improved or greatly improved after partial carpal arthrodesis and all were pleased or very pleased with the final surgical result. Hyperextension persisted in 11% of the cases and degenerative joint disease of the antebrachiocarpal joint was present in 15.5% of the cases. No dogs with partial carpal arthrodesis required panarthrodesis at a later date.  相似文献   

c-axis electrodynamics as evidence for the interlayer theory of high-temperature superconductivity     

PW Anderson 《Science (New York, N.Y.)》1998,279(5354):1196-1198

In the interlayer theory of high-temperature superconductivity, the interlayer pair tunneling energy (similar to the Josephson or Lawrence-Doniach energy) is the motivation for superconductivity. This connection requires two experimentally verifiable identities: the coherent normal-state conductance must be smaller than the "Josephson" coupling energy, and the Josephson coupling energy must be equal to the condensation energy of the superconductor. The first condition is well satisfied in the only case that is relevant, (La, Sr)2CuO4, but the second condition has been questioned. It is satisfied for all dopings in (La,Sr)2CuO4 and also in optimally doped Hg(Ba)2CuO5, which was measured recently, but seems to be strongly violated in measurements on single crystals of Tl2Ba2CuO6.  相似文献   

Chromatographic comparison of scorpion venoms     

JOHNSON RM  STAHNKE HL 《Science (New York, N.Y.)》1960,132(3431):895-896

The venom of seven species of scorpions Was subjected to two-dimensional chromratographic analysis. Six major components were defined and tentatively correlated with the physiological activity of the venoms.  相似文献   

Activation of purified prothrombin in association with synthetic organic compounds and platelet extract     

MURRAY M  JOHNSON SA  SEEGERS WH 《Science (New York, N.Y.)》1954,119(3087):293

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Periconia circinata,the cause of milo disease     

LEUKEL RW  JOHNSON AG 《Science (New York, N.Y.)》1948,107(2769):93-94

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