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Page 42 of articles about health in Articles

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North-American human influenza

It is produced by a virus with genetic material from porcine, human and avian viruses which has shown the ability unusually for such a virus to transmit from human to human. The virus appears to have 2 of 8 gene segments that derive from eurasian swine viruses. The NA and matrix genes of the new virus have not been seen in humans or pigs before.

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Immunology against PCV2: What difference is there between a subclinically affected animal and an animal with porcine circovirus?

Pigs that are not affected by the disease tend to have a quantity of sero-neutralizing (and also total) antibodies against PCV2, which is significantly greater than those that cause disease

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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

Diagnosis of porcine circovirus: individual and farm criteria

The aim of this article is to discuss those differentiating topics which are relevant from a practical point of view and which in some way elude the disease's definition.

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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Clinical signs and autopsy findings: can porcine circovirus be diagnosed on the farm?

The autopsy is always an important diagnostic element for the majority of diseases, and this is the same for porcine circovirosis.

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Controlling finisher PCV2 mortality: vaccination results (2/2)

Control of PCV2 infections are increasingly through piglet vaccination now that global supplies are increasing.

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PRRS control

The presence of subpopulations of exposed and non-exposed sows in chronically PRRSV-infected breeding herds assists in the maintenance of virus circulation in the breeding herd over time.

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Controlling finisher PCV2 mortality: infection dynamics (1/2)

Porcine circovirus type 2 (PCV2) infections can be extremely costly causing wasting and increases in mortality.

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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: Diagnostic testing methods

This article will focus on selected antigen and antibody detection methods based on their application by practicing veterinarians to field cases in the US.

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Diseases in Europe (2 of 2)

There are consistent strains of Streptococcus suis usually types 1 and 2 across Europe but the other strains vary from country to country.

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.