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1, visited the affected areas, or with the pigs and the history of close contact with influenza patients, 1 week clinical manifestations of influenza appeared in those who are suspicious. Of course, if there is no clear medical history, can not rule out the possibility of illness.
2, without fever, there is generally a preliminary diagnosis of exclusion, particularly in patients with body temperature of less than 38 °. But the disease can not continue to fever, a rare low-grade fever are not even heat. .
3, is very similar to common flu symptoms (fever, cough, runny nose, headache, sore throat, body aches, vomiting, etc.) that, with symptoms (ie your description) simply can not be confirmed.
4 assistant examination beneficial to diagnosis: tests: WBC count was not normally high or lower. More than the total number of critically ill patients have white blood cells and lymphocytes decreased and there is thrombocytopenia; chest imaging: The combined pneumonia lung slice images can be seen. Serious cases, a wide range of sheet images.
5, diagnosed conditions: influenza-like clinical manifestations, while one or more of the following laboratory results:
① Influenza A H1N1 influenza virus nucleic acid testing positive (can use real-time RT-PCR and RT-PCR).
② isolated influenza A H1N1 influenza viruses.
③ Influenza H1N1 influenza virus in serum and in specific antibody levels was four times or four times higher.
Differential diagnosis: It should be noted with the flu, avian flu, the flu, pneumonia, SARS, infectious mononucleosis syndrome, cytomegalovirus infection, Legionella pneumonia, chlamydia, mycoplasma pneumonia, and other identification.

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