Swine Influenza Virus (SI), Flu or selsema babi

Swine Influenza Virus (SI), Flu

Swine influenza is caused by a number of closely related influenza A viruses that are noted for their ability to change their antigenic structure and create new strains.Each serotype is identified by surface proteins referred to as "H" and "N". The three common strains that affect the pig are described as H1 N1, H1 N2 and H3 N2. There are also different strains within these serotypes with differing pathogenicity (capacity to produce disease).
The incubation period of the disease is very short, as little as 12-48 hours and the onset is usually rapid and dramatic.
It is virtually impossible to maintain a population of pigs that is influenza virus free.

SI in large herds may become endemic with intermittent bouts of disease and infertility and different strains may also sequentially infect the herd. Immunity to influenza viruses is often short lived (6 months) and the immunity profile in the breeding herd varies considerably with time.

The CattleSite Foot and Mouth Disease News

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Further FMD Cases Reported In Tibet

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TIBET, CHINA - Following the recent Foot and Mouth Disease (FMD) outbreak in Tibet, China, a further outbreak has occurred in the Linzhi region, Tibet.

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The new outbreak occured on the 30 September 2011 in Duixu village, Zhongda town, Lang, Linzhi, Tibet.


A total of 108 cattle were found susceptible to the outbreak, out of which seven cases were reported. No deaths were recorded. However, all susceptible animals were destroyed.


In the case of swine, a total of 22 pigs were found susceptible, but no cases were reported. All susceptible animals were destroyed.


The cause of the outbreak remains unknown.