Postweaning Multisystemic Wasting Syndrome Control and treatment strategies
نویسنده
چکیده
Once a diagnosis of herd Post-weaning Multisystemic Wasting Syndrome (PMWS) is made, (which can be difficult), a control and treatment programme of enhanced management must be immediately implemented. This programme is likely to be more intense than anything the farm health team has ever undertaken previously. As the causal agent of PMWS is not yet recognized, control has to be non-specific. The PMWS disease agent acts on other agents –specifically recognized is Porcine Circovirus 2 (PCV2) which contributes to the pathogenesis of the disease. Other possible agents are beginning to be recognized; among these are the Torque Teno viruses and possible Toro viruses. Even the role of PCV2 is becoming more complicated with 3 strains being recognized (PCV2a,b and c). The use of vaccines to PCV2 has proven to dramatically control the clinical signs of PMWS and while the PCV2 vaccines originate from PCV2a strains it appears to be protective against PMWS associated with the other strains. This is interesting as the natural presence of these viruses and their antibodies on a farm are not protective.
منابع مشابه
Histopathological Diagnosis of Postweaning Multisystemic Wasting Syndrome
Postweaning multisystemic wasting syndrome (PMWS) is a disease of pigs first recognised in North America in 1991 and subsequently reported worldwide that is caused by Porcine circovirus 2 (PCV2), a member of the family Circoviridae. The most consistent feature of PMWS is a generalized depletion of lymphocytes. Secondary infections with opportunistic organisms are common. There is evidence that ...
متن کاملRecognizing and diagnosing postweaning multisystemic wasting syndrome (PMWS)
http://www.aasp.org/shap/issues/v5n5/index.html ostweaning multisystemic wasting syndrome (PMWS) is a new disease first described in 1996.1,2 In the past 6–8, months the number of affected herds has grown considerably, and there are now confirmed cases in Alberta, Saskatchewan, Manitoba, Quebec, California, Iowa, Indiana, and Spain. Furthermore, since 1994, a similar syndrome—”wasting disease o...
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A case-control study was conducted to assess the association of major swine viral pathogens, including porcine circovirus type 2 (PCV2) with postweaning multisystemic wasting syndrome (PMWS). Cases were defined as individual pigs with a clinical history of progressive weight loss and respiratory signs and that were subsequently diagnosed with PMWS on the basis of characteristic histopathologica...
متن کاملDetection of porcine circovirus types 1 and 2 in serum and tissue samples of pigs with and without postweaning multisystemic wasting syndrome.
Presence of porcine circovirus type 1 (PCV1) and PCV2 was studied in sera and superficial inguinal lymph nodes from postweaning multisystemic wasting syndrome (PMWS)-affected and non-PMWS-affected pigs by using in situ hybridization and PCR. PCV1 and PCV2 were found in less than 3% and more than 50% of the samples, respectively. The most sensitive technique and site was PCR in superficial ingui...
متن کاملNucleotide sequence of porcine circovirus associated with postweaning multisystemic wasting syndrome in pigs.
This article describes the nucleotide sequence of a porcine circovirus (PCV) which possesses a high degree of association with postweaning multisystemic wasting syndrome (PMWS), a newly described disease of young pigs. The DNA sequence of this PMWS-associated PCV (pmws PCV) has 68% homology with that of a previously published nonpathogenic strain of PCV. The strains appear to be closely related...
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