How diagnosis of influenza？

The diagnosis of influenza can be determined in accordance with the following four points:
First, the collective history of exposure and disease within the short history of the patients with more flu symptoms and signs;
Second, the typical symptoms and signs: the incidence of influenza than the urgent, serious systemic symptoms, the patient sustained high fever, body temperature as high as 40 ℃, muscle joint pain, stuffy nose, runny nose, pharyngodynia symptoms appear late;
Third, the characteristics of influenza pandemic occur suddenly, spread rapidly, and there are obvious areas of the epidemic;
4, laboratory tests:
Blood routine examination: to reduce the total number of leukocytes, eosinophils disappeared, the relative increase in lymphocytes. If the merger bacterial infection, the WBC and the total number of neutrophils High.
Virus isolation: 70 percent of the available early positive results, the general incidence in the seventh day that can no longer get positive results.
Immunofluorescence technology: lotion for patients with nasal epithelial cells in the smear samples, the application of fluorescent antibody technology to detect, resulting in a fast, high sensitivity, contribute to early diagnosis.
Serological examination: hemagglutination inhibition test of the high specificity, and complement with high sensitivity tests. These methods only as a retrospective diagnosis, not suitable for rapid diagnosis.