Page 4 of articles about influenza in Articles

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.

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.

Overall, the disease situation in Europe is very similar although there are some countries that have a problem with certain diseases that others do not have

Any factor that irritates or inflames the respiratory system will elicit the physiological response of either sneezing or coughing or both. Although alarming and indicative of disease, coughing is at least a sign that normal physiological responses are taking place and should not in isolation be necessarily seen as a bad thing. We may have sudden or generalized outbreaks of coughing as well as a constant coughing in pig groups. There are infectious pathogenic agents that are normally associated with coughing or laboured breathing in pigs such as Actinobacillus, Bordetella, Haemophilus, Pasteurella Streptococcus, Mycoplasma, SIV, PRRSV or PCV2.