Gordon Campbell | Parliament TV | Parliament Today | News Video | Crime | Employers | Housing | Immigration | Legal | Local Govt. | Maori | Welfare | Unions | Youth | Search

 

Questions and Answers on Pig Virus

Questions and Answers on Pig Virus

What is Post-Weaning Multisystemic Wasting Syndrome (PMWS) PMWS is an emerging viral disease of pigs that is being diagnosed with increasing frequency in Canada, the United States, Europe and Asia. Pig practitioners and diagnosticians in several countries began to recognise it in the early 1990's, and Canadian scientists confirmed the disease in a Saskatchewan pig herd in 1996.

What causes PMWS? PMWS is a multi-factorial disease associated with porcine circovirus type 2 (PCV2), porcine parvovirus (PPV), and porcine reproductive and respiratory syndrome virus (PRRSV). Two of these agents – PPV and PCV2 – are endemic to New Zealand.

How is PMWS diagnosed? Diagnosis is dependent upon three criteria. Presence of compatible clinical signs Presence of characteristic microscopic lesions Demonstration of PCV2 within these lesions

A definite diagnosis is confirmed by post-mortem examination of samples from pigs showing the characteristic clinical signs, by finding histopathological lesions in various internal organs and confirming the presence of viral material using immunohistochemistry (IHC) staining.
Has PCV2 been linked with any other diseases? PCV2 is an important part of the cause of Porcine Dermatitis Nephropathy Syndrome. While PMWS remains the most important syndrome associated with PCV2, this virus has been linked with a number of other syndromes in various parts of the world, including certain types of Congenital Tremor in piglets, nervous disease possibly leading to sudden death in weaners, Proliferative and Necrotising Pneumonia (PNP), perinatal myocarditis, low-grade reproductive problems and possibly Sow Abortion and Mortality Syndrome (SAMS).
How does PMWS affect pigs? The disease affects eight to16 week old piglets, often peaking at nine to 10 weeks. Clinical signs include loss of condition, failure to thrive, pallor and possible diarrhoea. Some pigs may exhibit breathing difficulties and jaundice.

How is PMWS spread? It is thought that the disease might be spread through the movement of pigs or possible semen.

Is PMWS very infectious? PMWS is a syndrome caused by a combination of infectious, pig, and environmental factors. Hence clinical disease is often absent despite the presence of infectious agents.

Is there any treatment for PMWS? Currently, there is no vaccine to prevent PMWS and there is no treatment. Mortality rates vary between 4 to 10% but farms with post-weaning mortality up to 60% have been reported. Another feature is the persistent nature of the syndrome – some farms are still affected for two or more years and still experience similar levels of mortality.

How widely spread is PMWS PMWS is recognised as a world wide problem. Australia is free of the disease and although an investigation is underway in New Zealand it has not yet be confirmed.

What can pig farmers do to manage PMWS? There are numerous important management practices useful for mitigating the spread of PMWS. Veterinarians, producers, industry and government representatives from the European Commission met in September 2001 and put forth "three golden rules" to control PMWS. These were?:
1. limiting litter to litter contact, both directly, through fostering and multi-suckling, and indirectly from shared needles, equipment, mud, etc., 2. reducing animal stress and susceptibility to disease by limiting exposure to micro organisms, and 3. practising good management, hygiene and biosecurity on the farm. These practices are common sense activities, which can minimise the spread of not only PMWS, but many other diseases, as well.

© Scoop Media

 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell: On What Triggered The Carnage In Gaza

At last count, 195 Palestinians have reportedly died in the latest round of violence, 55 of them children. Roughly ten times that number have been wounded, and thousands made homeless. On the Israeli side, 8 people have died from rockets fired from Gaza. The imbalance in casualties reflects the vast gap in weaponry between the two sides. The Israelis are carrying out air strikes with impunity on densely populated civilian neighbourhoods... More>>

 

Budget 2021: Boosts Carbon Neutral Government Commitment

· Budget 2021 delivers $67.4 million to support the transition to a carbon neutral public sector by 2025 · State Sector Decarbonisation Fund receives significant boost to support more schools, hospitals and other government organisations to replace ... More>>

Government: To Rev Up Reductions In Transport Emissions

The Government is calling for feedback on a range of potential policies to eliminate emissions in the transport sector. Transport Minister Michael Wood today released Hīkina te Kohupara – Kia mauri ora ai te iwi - Transport Emissions: Pathways to ... More>>

KiwiSaver: Default Provider Scheme Improvements Slash Fees, Boosts Savings

Hundreds of thousands of New Zealanders will be significantly better off in retirement following changes to the default KiwiSaver scheme, Finance Minister Grant Robertson and Commerce and Consumer Affairs Minister David Clark said today. More>>

ALSO:

Child Poverty: Reports Highlight Need For Ongoing Action

The Government has released the first Annual Report for the Child and Youth Wellbeing Strategy and the second Child Poverty Related Indicators (CPRI) Report, both of which highlight improvements in the lives of children as a result of actions of the Government, ... More>>

ALSO:

PM: Statement On The Speaker And Annual Review Debate

“The serious issue of alleged sexual assault and harassment at Parliament was poorly managed and inappropriately politicised last night. The tone of the debate did not reflect well on Parliament as a whole,” Prime Minister Jacinda Ardern said. ... More>>

Parliament: Mallard Fails To Give Taxpayers A Straight Answer

Trevor Mallard has confirmed he is unfit to be Parliament’s Speaker by failing to answer several important questions relating to the false rape accusation saga that cost taxpayers more than $330,000, Shadow Leader of the House Chris Bishop says. ... More>>

Local Government: Independent Review To Explore Future

Local Government Minister Nanaia Mahuta says an independent review of local government will explore how councils can maintain and improve the wellbeing of New Zealanders in the communities they serve long into the future. More>>

ALSO:


 
 
 
 
 
 

LATEST HEADLINES

  • PARLIAMENT
  • POLITICS
  • REGIONAL
 
 

InfoPages News Channels