Meningococcal disease is a highly dangerous acute infectious disease that can onset suddenly and pose a direct threat to life if not detected and treated promptly.
WHAT IS MENINGOCOCCAL DISEASE?
Meningococcal disease is caused by the bacterium Neisseria meningitidis. It typically presents in two major clinical forms: meningitis (infection of the lining of the brain and spinal cord) or septicemia (bloodstream infection), and sometimes a combination of both simultaneously.
It is considered one of the most dangerous acute infections. Because the bacteria can reside in the nasopharynx (nose and throat) of healthy individuals (asymptomatic carriers), the pathogen can easily and silently spread through respiratory droplets during close contact.
This disease progresses extremely rapidly and can be fatal within just a few hours. Globally, it occurs worldwide in the form of sporadic cases or epidemic outbreaks.
WHO IS AT RISK FOR MENINGOCOCCAL DISEASE?
Anyone can contract the disease. However, infants under 1 year old with immature immune systems, and adolescents or young adults aged 16 to 23 who frequently gather in communal environments, are at the highest risk.
Neisseria meningitidis bacteria are transmitted via the respiratory tract from infected patients or asymptomatic carriers through actions such as coughing, sneezing, talking, direct exposure to respiratory droplets, or sharing personal items.
The disease most commonly affects children under 5, adolescents, and those who are unvaccinated. Additionally, the risk of infection is exceptionally high for immunocompromised individuals—such as those with an impaired or removed spleen (splenectomy), people living with HIV, patients on immunosuppressive medications, individuals with active respiratory infections, smokers, and travelers visiting endemic areas.
BACTERIAL SEROGROUPS CAUSING MENINGOCOCCAL DISEASE
Environmental conditions also play a significant role in facilitating the spread of the disease. It typically thrives in crowded, enclosed, and poorly ventilated environments such as daycares, schools, dormitories, industrial zones, and military barracks. Seasonally, outbreaks are more likely to occur during winter and spring when the weather turns cold and dry.
Regarding the specific bacterial strains, a total of 12 serogroups have been identified to date. Among these, 6 primary serogroups are responsible for major epidemics worldwide: A, B, C, W-135, X, and Y. In Vietnam specifically, the most prevalent serogroups are A, B, C, W-135, and Y.
EFFECTIVE PROACTIVE PREVENTIVE MEASURES AGAINST MENINGOCOCCAL DISEASE
Full Vaccination: The Most Effective Way to Prevent Meningococcal Disease
Comprehensive vaccination is the most proactive and effective measure to prevent meningococcal disease. Individuals should proactively visit vaccination centers to consult with doctors and get fully immunized against common meningococcal serogroups (such as A, B, C, Y, and W-135).
Phuong Nam Hospital currently offers vaccines protecting against 5 meningococcal serogroups (A, B, C, W-135, and Y) for both children and adults:
Bexsero (Manufactured in Italy): Vaccine against invasive meningococcal disease caused by Neisseria meningitidis serogroup B.Price: 1,795,000 VND (Excluding consultation and injection fees)
Menquadfi (Manufactured in the USA): Vaccine against meningococcal disease (serogroups A, C, Y, and W-135).Price: 1,760,000 VND (Excluding consultation and injection fees)
Interested parents and families can contact the Phuong Nam Hospital Hotline at 1900 54 54 66 for consultation and to book an appropriate vaccination appointment.
Personal Hygiene Practices
Besides vaccination, maintaining daily personal hygiene significantly reduces the risk of infection. Everyone should regularly wash hands with soap or hand sanitizer; strictly avoid sharing personal items that may come into contact with saliva or respiratory secretions (such as drinking glasses, bowls, or toothbrushes); keep homes and workplaces well-ventilated; and limit gathering in enclosed spaces. Maintain a healthy lifestyle through regular exercise, a nutritious diet, and avoiding smoking.
Limit close contact with suspected cases.
Community Prevention Measures
Wear masks; ensure early detection and prompt isolation; seek immediate medical attention if experiencing high fever, headache, or suspecting exposure to risk factors; administer prophylactic treatment for close contacts of infected individuals; and promote health education within the community to raise awareness. Ensure living spaces and classrooms are clean and well-ventilated, and disinfect toys and household items regularly.
RECOGNIZING THE SYMPTOMS OF MENINGOCOCCAL DISEASE
The disease has an average incubation period of 3 to 4 days. During this onset phase, early signs such as sneezing, a runny nose, and fatigue are easily mistaken for the common cold; however, the condition will rapidly worsen.
In cases of Meningitis: Patients typically experience a sudden high fever with chills, severe headache, projectile vomiting (unrelated to meals), stiff neck, sensitivity to light (photophobia), altered mental status, seizures, coma, and potentially death. In infants, symptoms often manifest as a refusal to feed, excessive crying, extreme lethargy, or a bulging fontanelle (soft spot) before reaching a critical state.
In cases of Septicemia (Bloodstream Infection): Characteristic signs include sudden high fever, chills, muscle aches, severe joint pain throughout the body, and the appearance of a purpuric rash (purple spots) on the thighs, lower legs, and torso. These spots can rapidly spread and become necrotic in the center. The most dangerous form is fulminant meningococcemia, which progresses extremely fast within hours, plunging the patient into septic shock, dangerously low blood pressure, multiple organ failure, disseminated intravascular coagulation (blood clotting disorders), and death.
EARLY WARNING SIGNS IN CHILDREN AND ADULTS
Recognizing these warning symptoms early is a matter of life and death, ensuring the patient receives immediate emergency care.
Symptoms in Adults and Older Children: Sudden high fever, severe headache, stiff neck, confusion or drowsiness, sensitivity to light, nausea, and the potential appearance of rapidly spreading purple bruises on the skin.
Symptoms in Infants and Toddlers: Extreme lethargy, difficulty waking up, inconsolable crying, poor feeding, vomiting, or a bulging soft spot (fontanelle) on top of the head.
DANGEROUS COMPLICATIONS OF MENINGOCOCCAL DISEASE
The consequences of meningococcal disease are devastating, with a mortality rate ranging from 8-15%, which can surge to 40-50% if the patient enters fulminant septic shock, even with medical intervention.
For the 10-20% of patients who survive, many are left with lifelong physical and neurological complications, including hearing loss, blindness, intellectual disability, epilepsy, limb weakness or paralysis, necrotic skin scarring, limb amputation, or chronic kidney failure.
DOCTOR'S ADVICE
Meningococcal disease is an extreme medical emergency. If you or any family member exhibits the suspected signs mentioned above, absolutely do not attempt home treatment. Go immediately to the nearest medical facility for prompt examination and intervention to avoid tragic outcomes. A delay of even a few hours can cost a life.
For those who have had close contact with a confirmed case, taking prophylactic antibiotics exactly as prescribed by healthcare professionals is absolutely crucial to eliminate bacteria colonizing the throat, break the chain of transmission, and prevent the pathogen from developing.