Meningitis Common in Winter-Spring: Recognize Symptoms to Prevent Invasion
Meningitis, short for epidemic cerebrospinal meningitis, occurs mainly in winter and spring and is a special type of purulent meningitis caused by Neisseria meningitidis. Though widely known and recurring annually, many patients fail to recognize symptoms early, leading to delayed treatment and serious consequences. The main reason lies in meningitis’s deceptive “three-stage trick.”
Stage One: Bacterial invasion of the upper respiratory tract—Neisseria meningitidis spreads primarily through the respiratory route. Early infection invades mucosal tissues of the throat, larynx, and airways, causing acute inflammation. Symptoms include sore throat, hoarseness, fever, runny nose, and cough—commonly mistaken for colds, flu, or upper respiratory infections, thus often ignored.
Stage Two: Septicemia phase—bacteria enter the bloodstream and multiply rapidly, causing systemic symptoms: high fever, headache, general malaise, skin petechiae and ecchymoses, and even shock, adrenal insufficiency, and circulatory collapse—frequently misdiagnosed as systemic infection or sepsis.
Stage Three: Invasion of the meninges—bacteria invade the brain and spinal cord, multiplying in cerebrospinal fluid and causing purulent meningitis. Only now do typical neurological symptoms emerge: severe headache, vomiting, neck stiffness, bulging fontanelle in infants, papilledema, convulsions, seizures, and coma. Most people only suspect meningitis at this stage—too late.
Early diagnosis requires attention to several key points:
1. Epidemic season: January to May, with March as peak.
2. Susceptible population: highest incidence in children aged 6 months to 2 years; in remote areas, peak shifts to ages 4–5.
3. Core symptom: persistent high fever that doesn’t subside.
4. Watch for skin petechiae and ecchymoses.
5. Monitor for bulging fontanelles in infants.
6. Do not refuse lumbar puncture—it provides immediate diagnostic clarity.<brain>