[spongiform encephalopathies with special reference to bovine spongiform encephalopathy].in switzerland bovine spongiform encephalopathy (bse) was detected for the first time in november 1990. it is a transmissible disease of the central nervous system similar to creutzfeldt-jakob disease (cjd), gerstmann-sträussler-scheinker syndrome (gss) and kuru in man, and, in animals, scrapie in sheep and goats, chronic wasting disease (cwd) in captive mule deer and elk of north america and transmissible mink encephalopathy (tme) of farm reared mink. the infectious agent of the spongiform ence ...19921615298
bovine spongiform encephalopathy: a neuropathological perspective.the occurrence of bovine spongiform encephalopathy (bse), recognition that it is a new scrapie-like disease epidemic in domestic cattle in the united kingdom and concern of a remote zoonotic potential has, in four years, produced a plethora of documented information. while much of this information has been communicated outwith the scientific literature, this review attempts to summarise, from a neuropathological viewpoint, the main findings to emerge. the initial studies established the nosologi ...19911688299
bovine spongiform encephalopathy: a scrapie-like disease of british cattle.scrapie is a cns degenerative infection of sheep and goats, which is invariably fatal after incubation periods of several months to years. related disorders are found naturally in man and other species. there is a impairment of protein catabolism in scrapie and related diseases which leads to the accumulation of sparingly-soluble protein deposits in brain. these protein aggregates may share with the amyloid of alzheimer's disease (ad) some common stage in the biochemical pathways of their format ...19892574875
studies on a species-specific epitope in murine, ovine and bovine prion protein.transmissible spongiform encephalopathies are fatal neurodegenerative disorders which are linked to abnormal isoforms of the prion protein (prp), which is expressed in different cells of various mammalian species. susceptibility to disease and reduced transmission rates upon the first passage to another species are thought to be a result of functional and biochemical differences of the prp as a consequence of amino acid sequence among species. in 1985 an epidemic of bovine spongiform encephalopa ...19937687651
[scrapie in sheep and transmissible encephalopathy of the mink].scrapie in sheep and goat is the prototype of the group of the transmissible spongiform encephalopathies which affect man and some animal species, notably other ruminants with bovine spongiform encephalopathy (bse) and chronic wasting disease of wild ruminants. transmissible mink encephalopathy (tme) is a rare disease of ranch-raised mink caused by exposure to a contaminated food ingredient in the ration scrapie, unrecognised bse-like disease...). there is clinical and pathological similarities ...19957777384
transmissible spongiform encephalopathies (tse): minimizing the risk of transmission by biological/biopharmaceutical products: an industry perspective.several guidelines and recommendations have been published on assessing the potential risk of a biological product being contaminated with an agent causing a transmissible spongiform encephalopathy (tse). basic principles which can be used during the manufacturing of biological products to minimize the risk of transmission of tse agents include the following: (i) obtaining animals, tissues or animal-derived raw materials from countries in which the relevant tse agent is reported to be absent; (i ...19969119148
synthetic peptide vaccines yield monoclonal antibodies to cellular and pathological prion proteins of ruminants.transmissible spongiform encephalopathies are closely linked to the accumulation of a pathological isoform of a host-encoded prion protein (prp(c)), designated prp(sc). in an attempt to generate mono- and polyclonal antibodies to ruminant prp, 32 mice were vaccinated with peptide vaccines which were synthesized according to the amino acid sequence of ovine prp. by this approach five prp-reactive polyclonal antisera directed against four different domains of the protein were stimulated. splenocyt ...19989568991
experimentally induced bovine spongiform encephalopathy did not transmit via goat embryos.goats are susceptible to experimental challenge with bovine spongiform encephalopathy (bse). this study set out to investigate whether the transmission of bse could occur in goats following the transfer of embryos from experimentally infected donor females into uninfected recipient females. the results showed no evidence of transmissible spongiform encephalopathy disease in any of the offspring which developed from embryos from infected donors, nor indeed in any of the recipient females used as ...199910073715
prion protein and species barriers in the transmissible spongiform the transmissible spongiform encephalopathies (tse), the conversion of the normal protease-sensitive host protein prp-sen to an abnormal protease-resistant form, prp-res, is a critical step in disease pathogenesis. amino acid mismatches between prp-sen and prp-res can dramatically affect the amount of prp-res made and modulate the resistance to cross-species transmission of tse infectivity. experiments in transgenic mice, tissue culture cells, and cell-free systems have been used to identify ...199910221165
bovine spongiform encephalopathy (bse) in sheep? 200212019700
bse: a consequence of cattle feeding with glycated molecules host-unknown?although there is much evidence supporting a prion contribution in the pathogenesis of transmissible spongiform encephalopathies, a novel point of view as to the induction of the diseases can be proposed. it is hypothesized that neurodegenerative diseases, such as scrapie in sheep and goats and bovine spongiform encephalopathy in cattle (bse), originate from the consumption of glycated proteins contained in their feed. these components are obtained during a high-temperature glycation process.200212027519
risk management of the transmissible spongiform encephalopathies in north north american free trade agreement partners, canada, the united states of america (usa) and mexico apply independent but harmonised transmissible spongiform encephalopathy (tse) risk management strategies in observance of office international des epizooties guidelines. the divergence between bovine spongiform encephalopathy (bse) risk management approaches in north american and europe reflects comparatively reduced external and internal bse risks in north america. the external quarantine and ...200312793780
evaluation of rapid tests for the diagnosis of transmissible spongiform encephalopathies in sheep and accordance with eu regulation 999/2001, rapid tests already adopted for bovine spongiform encephalopathy (bse; prionics check western, platelia-bse and enfer tse) are to be applied in all european countries to a sub-population of over 18-month-old slaughtered or dead sheep and goats to improve scrapie surveillance and to determine the possible presence of bse in sheep; however, the three tests have thus far been evaluated only for bse and no official data are available about their performance ...200415067554
atypical scrapie in a swiss goat and implications for transmissible spongiform encephalopathy surveillance.different types of transmissible spongiform encephalopathies (tses) affect sheep and goats. in addition to the classical form of scrapie, both species are susceptible to experimental infections with the bovine spongiform encephalopathy (bse) agent, and in recent years atypical scrapie cases have been reported in sheep from different european countries. atypical scrapie in sheep is characterized by distinct histopathologic lesions and molecular characteristics of the abnormal scrapie prion protei ...200717459826
rapid typing of transmissible spongiform encephalopathy strains with differential elisa.the bovine spongiform encephalopathy (bse) agent has been transmitted to humans, leading to variant creutzfeldt-jakob disease. sheep and goats can be experimentally infected by bse and have been potentially exposed to natural bse; however, whether bse can be transmitted to small ruminants is not known. based on the particular biochemical properties of the abnormal prion protein (prpsc) associated with bse, and particularly the increased degradation induced by proteinase k in the n terminal part ...200818394279
prpsc spreading patterns in the brain of sheep linked to different prion types.abstract: scrapie in sheep and goats has been known for more than 250 years and belongs nowadays to the so-called prion diseases that also include e.g. bovine spongiform encephalopathy in cattle (bse) and creutzfeldt-jakob disease in humans. according to the prion hypothesis, the pathological isoform (prpsc) of the cellular prion protein (prpc) comprises the essential, if not exclusive, component of the transmissible agent. currently, two types of scrapie disease are known - classical and atypic ...201121324114
molecular discrimination of sheep bovine spongiform encephalopathy from scrapie.sheep ch1641-like transmissible spongiform encephalopathy isolates have shown molecular similarities to bovine spongiform encephalopathy (bse) isolates. we report that the prion protein prpsc from sheep bse is extremely resistant to denaturation. this feature, combined with the n-terminal prpsc cleavage, allowed differentiation of classical scrapie, including ch1641-like, from natural goat bse and experimental sheep bse.201121470463
experimental interspecies transmission studies of the transmissible spongiform encephalopathies to cattle: comparison to bovine spongiform encephalopathy in cattle.prion diseases or transmissible spongiform encephalopathies (tses) of animals include scrapie of sheep and goats; transmissible mink encephalopathy (tme); chronic wasting disease (cwd) of deer, elk and moose; and bovine spongiform encephalopathy (bse) of cattle. the emergence of bse and its spread to human beings in the form of variant creutzfeldt-jakob disease (vcjd) resulted in interest in susceptibility of cattle to cwd, tme and scrapie. experimental cross-species transmission of tse agents p ...201121908269
detection of central nervous system tissues in meat products: validation and standardization of a real-time pcr-based detection system.several phenotypic as well as genotypic methods have been published describing the detection of central nervous system (cns) tissues that are part of the bovine spongiform encephalopathy (bse) risk material in food products. however, none of these methods is able to differentiate between cns tissue of the banned ruminant species and tissues of other animal species. a quantitative and species-specific real-time rt-pcr method has been developed that enables the reliable identification of cns tissu ...200717507185
brief review on the epidemiology of transmissible spongiform encephalopathies (tse).transmissible spongiform encephalopathies (tse) form a group of human and animal diseases that share common features such as (a) distinct pathological lesions in the central nervous system, (b) transmissibility at least in experimental settings, and (c) a long incubation period. considerable differences exist in the host range of individual tses, their routes of transmission, and factors influencing the host susceptibility (such as genotype). the objective of this review was to briefly describe ...200717126962
possible case of bse agent in a uk goat that died in 1990. 200516687772
[srm in bse infected animals and food safety]. 200516440797
beef and bovine spongiform encephalopathy: the risk persists.bovine spongiform encephalopathy (bse) is one of the transmissible spongiform encephalopathies (tse) that are currently known to the authors to affect only mammals, including man. the diseases are progressive, fatal paralyses and dementias, for which there are no methods of certain diagnosis and no treatment. in this review the disease in cattle, the mode of transfer of these tses between animals by mouth, the possible presence of infective agents in the food that we eat, the resistance of bse t ...19911923069
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