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Page 9 of articles about biosecurity in Articles

PRRS Eradication: A dream or missed opportunity?

Since 1987, Porcine Reproductive and Respiratory Syndrome virus (PRRS) has become a global drain on pig productivity, profitability, and many a producers’ morale. One thing that remains certain is PRRS virus continually finds ways to circumvent our best bio-management efforts. PRRS marches on in a ceaseless continuum of antigenic change making current vaccines and other control techniques of limited value.

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Applying science to disinfecting

The cleaning and disinfection process are critical steps in any biosecurity program in order to minimize the transmission of diseases. Washing is the most critical step of the entire process. This step will remove over 99% of the microorganisms.

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Biosecurity measures to prevent airborne infection in pig farms

Experimentally it is difficult to demonstrate whether a pathogen can be windborne and if so how far.

North American H1N1 influenza update

The usual pig viruses are H1N1, H3N2 and H1N2. The original H1N1 pig viruses have been largely replaced by poultry viruses in pigs. The H3N2 viruses were from humans originally. The H1N2 viruses are re-assortants from human viruses (H and N genes) and poultry viruses.

Biosecurity measures to prevent pig farms being infected by wild animals

Wild animals which may spread infection between farms include wild pigs, birds, flies, rats and mice.

circovirosis

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Risk and/or triggering factors of porcine circovirus

Between 1995 and 1997, at the beginning of an epizootic called “maladie de l’amagrissement du porcelet” (MAP), it was observed that the farms that were most affected and that had the most losses, generally presented obvious deviations from what we would consider to be a suitable management of the animals and facilities. This is why Dr. François Madec made a list of management practices with the aim of improving the anomalous situation observed.

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An overview of North American PRRS eradication efforts

The use of diagnostics will allow producers and practitioners to work together towards the common goal of PRRS eradication

The Ebola Reston virus in Philippine pigs

On December, the Philippine Department of Agriculture announced that the non-lethal Ebola Reston Virus previously only found in monkeys, had been detected in pigs

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Epidemiolology and control of swine influenza

Considering the current situation we are reproducing an article by Tom Alexander previously published by 3tres3.com on 30/dec/2005. A key factor in the epidemiology of influenza is the ability of the virus to mutate or, when cells are infected by two different strains, to recombine to produce new viruses. Either of these genetic changes results in the repeated appearance of new strains with different immunogenic structures and/or virulence, including their ability to infect different hosts.

PRRS Eradication

Preventing vertical and horizontal spread of PRRSV from dam to offspring is critical for the production of naive replacement stock

Biosecurity II. Biosecurity measures based on the epidemiology of individual infections

Pathogens which are highly infectious and only require small doses to establish infection in susceptible pigs and/or those which are able to survive environmentally for relatively long periods can be spread from farm to farm as fomites

Biosecurity I: Relative importance of different precautions

This is the first of a series of articles written by Tom Alexander for www.3tres3.com which we would like to publish again here as a way of paying homage and showing gratitude for his invaluable collaboration.

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PRRS Biosecurity

Trailers contaminated with PRRSV can serve as a source of infection for naïve pigs. Therefore, sanitation for livestock trailers and transport vehicles is considered a high priority when it comes to biosecurity practices.

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Epidemiology and transmission of PCV2 and of porcine circovirus

It is assumed that the most probable route of PCV2 transmission is the oronasal tract, which would indicate that horizontal transmission (sow-piglet or piglet-piglet) is a frequent or very frequent occurence

PRRS: Transmission via indirect routes (2/2)

Migratory waterfowl have been proposed as vectors of PRRSV spread between farms, due to their migratory nature and their tendency to nest on or near to swine farm lagoons

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Current sanitary problems in the United States

The focus of swine production in the USA has changed over the last five years. Many businesses in the sector have made radical changes in management both from the reproductive and the sanitary point of view.