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There are three basic patterns of polio infection: subclinical infections, nonparalytic, and paralytic. Approximately 95% of these are subclinical infections, which may go unnoticed.
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Clinical poliomyelitis affects the central nervous system (brain and spinal cord) and is divided into nonparalytic and paralytic forms. It may occur after recovery from a subclinical infection.
SUBCLINICAL INFECTION
- no symptoms, or symptoms lasting 72 hours or less
- slight fever
- headache
- general discomfort or uneasiness (malaise)
- sore throat
- red throat
- vomiting
NONPARALYTIC POLIOMYELITIS
- symptoms last 1 to 2 weeks
- moderate fever
- headache
- vomiting
- diarrhea
- excessive tiredness, fatigue
- irritability
- pain or stiffness of the back, arms, legs, abdomen
- muscle tenderness and spasm in any area of the body
- neck pain and stiffness
- pain front part of neck
- back pain or backache
- leg pain (calf muscles)
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skin rash or lesion with pain
- muscle stiffness
PARALYTIC POLIOMYELITIS
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