Clinical symptoms range from an acute illness mimicking bacterial meningitis to a non-specific illness of fever and headache, with a smaller proportion having cranial nerve palsies [ 22].
The vast majority of infections are subclinical (>90%), while the remainder present with a self-limited illness of fever, myalgia, malaise, sore throat and headache (abortive polio) or aseptic meningitis (i.e. non-paralytic polio).
A 47-year-old merchant seaman was admitted to the University Hospital of Infectious Diseases, Zagreb, Croatia, in March, 2006 on the 17th day of illness because of fever, headache, vomiting, and constipation.
A compatible illness of WNV fever was defined as symptoms consisting of >2 of the following occurring within 90 days of testing: fever, headache, chills, myalgia, arthralgia, rash, lymphadenopathy, muscle weakness, or severe malaise.
Information such as the date of onset of illness, fever, living conditions, history of exposure in dormitory and field, and clinical symptoms and signs was obtained and recorded.
The patient, a 14 year-old Afro-Caribbean female, presented to the hospital on day 3 post onset of illness with complaints of fever, generalized body pain and abdominal pain.
DF, DHF and DSS patients whole blood samples selected for the present study corresponded to comparable duration of illness after onset of fever: all were collected within a window of time comprised between 3 days and 7 days after onset of fever (being considered day 0).
Cases were defined according to criteria of influenza-like illness (sudden onset of fever >39°C with myalgia and respiratory signs).
The patient had an illness with symptoms of fever, headache, retro-orbital pain, arthralgia, chills, cough, and nasal congestion.
In 1978, nearly half the population of an industrial town in Finland were affected by a flu-like illness, with symptoms of fever, fatigue, cough, dyspnoea and myalgia.
A 10-year-old boy was brought to the Yam Island Health Clinic, Torres Strait, Queensland, in May 2003, five days into an illness with manifestations of fever (38.1°C), headache, and cough.
