Monday, November 19, 2012

Symptomatology of flu infection

Flu, is an infectious disease of birds and mammals caused by an RNA virus of the family Orthomyxoviridae (the influenza viruses).

These highly contagious, acute infections are localized in the upper respiratory tract. One of the first symptoms is nasal congestion and discharge accompanied by sneezing.

Actually for a couple of days after infection the patient remain symptom free, The patient start to feel unwell, and develop a cough and a sore throat. Then he feel cold and shiver violently. The muscle ache. He may have a headache, and aching eyes.

A cough appears on the second day or third day, followed by a drop in fever with drenching sweats by the third to fifth day.

The patient lose appetite and feel sleepy. The symptoms increase in severity for a few days but begin to recover and in time are back to normal.

After symptoms have subsided, he or she may also feel depressed and fatigued. A sufferer should be reassured that this feeling is quite normal after flu and may last a few weeks.

In more serious cases, influenza causes pneumonia, which can be fatal, particularly in young children and the elderly. They may need to be hospitalized.
Symptomatology of flu infection

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