被感染了猪流感的猪有何症状？中英文对照阅读
Swine Flu in Pigs 猪流感与猪How does swine flu spread among pigs?
Swine flu viruses are thought to be spread mostly through close contact among pigs and possibly from contaminated objects moving between infected and uninfected pigs. Herds with continuous swine flu infections and herds that are vaccinated against swine flu may have sporadic disease, or may show only mild or no symptoms of infection.
猪流感在猪群中如何传播？
猪流感病毒被认为通过猪之间的近距离接触进行传播，另一种可能的传播方式是携带病毒的物体将病毒从被感染的猪群传播到健康的猪群中。被连续感染猪流感的猪，以及已注射抗流感疫苗的猪会零星地发生流感，或者只出现轻微的感染症状，或者会不出现感染。
What are signs of swine flu in pigs?
Signs of swine flu in pigs can include sudden onset of fever, depression, coughing (barking), discharge from the nose or eyes, sneezing, breathing difficulties, eye redness or inflammation, and going off feed.
被感染了猪流感的猪有何症状？
症状包括突发的发烧，抑郁，咳嗽(吠叫)，鼻子或者眼睛产生排泄物，打喷嚏，呼吸困难，眼红或者眼肿，以及厌食。
How common is swine flu among pigs?
H1N1 and H3N2 swine flu viruses are endemic among pig populations in the United States and something that the industry deals with routinely. Outbreaks among pigs normally occur in colder weather months (late fall and winter) and sometimes with the introduction of new pigs into susceptible herds. Studies have shown that the swine flu H1N1 is common throughout pig populations worldwide, with 25 percent of animals showing antibody evidence of infection. In the U.S. studies have shown that 30 percent of the pig population has antibody evidence of having had H1N1 infection. More specifically, 51 percent of pigs in the north-central U.S. have been shown to have antibody evidence of infection with swine H1N1. Human infections with swine flu H1N1 viruses are rare. There is currently no way to differentiate antibody produced in response to flu vaccination in pigs from antibody made in response to pig infections with swine H1N1 influenza.
While H1N1 swine viruses have been known to circulate among pig populations since at least 1930, H3N2 influenza viruses did not begin circulating among US pigs until 1998. The H3N2 viruses initially were introduced into the pig population from humans. The current swine flu H3N2 viruses are closely related to human H3N2 viruses.
猪流感在猪群中经常发生吗？
H1N1和H3N2猪流感病毒在美国是地区性发作的，这也是养猪业经常要面对的问题。流感通常在天气寒冷的月份爆发（深秋以及冬季），并且会从猪传播到其他易感染的牲畜当中。研究表明H1N1猪流感在全世界猪群中都比较普遍，并且抗体证据表明有25%的动物被感染过。在美国，有30%的猪被检测出抗体，表明它们被H1N1感染过，而在美国中北部，这个比例是51%。人类感染H1N1猪流感病毒的病例很少见。比较接种猪流感疫苗而产生的抗体与猪抵抗H1N1病毒而产生的抗体，两者到目前为止并没有发现不同之处。
H1N1猪流感病毒早在1930年就被发现在猪群中传播，而H3N2流感病毒则直到1998年才发现在美国传播开来。H3N2病毒一开始是从人身上传染到猪的，现在的H3N2猪流感病毒与H3N2人流感病毒有着很近的相关性。
Is there a vaccine for swine flu?
Vaccines are available to be given to pigs to prevent swine influenza. There is no vaccine to protect humans from swine flu. The seasonal influenza vaccine will likely help provide partial protection against swine H3N2, but not swine H1N1 viruses.
猪流感有疫苗吗？
猪流感疫苗被用于防止猪流感在猪群中传播，但目前没有疫苗来防止猪流感在人群中传播。对人来说，季节性流感疫苗很可能只能提供部分的保护免受H3N2猪流感病毒，但对于H1N1猪流感病毒，该疫苗没有保护作用。