Causes and Diagnosis of Norovirus Infection
A person may also acquire the infection upon coming in contact with an infected person or touching contaminated surface and then touching the eyes, nose or mouth with the contaminated hand.
Once a person becomes infected, the infection begins to spread to others through shaking hands or other modes of touch. Infection also spreads through shared utensils, shared foods and so on. Individuals with a weak immune system are particularly vulnerable to the infection.
Norovirus infection may be diagnosed using a stool test but very often the diagnosis is made merely by carefully observing the symptoms. A very small percentage of people present with no symptoms as they may have a natural protection against the virus. Specific norovirus diagnosis is carried out with the help of the sensitive test known as polymerase chain reaction (PCR).