WA Health has reported four cases of meningococcal infection in the past week; three are serogroup B and typing is pending on the fourth.
Two cases are children from the same household, while the other two cases are adults with no links to the children or to each other. All individuals are recovering in hospital.
Meningococcal disease is an uncommon, life-threatening illness caused by a bacterial infection of the blood and/or the membranes that line the spinal cord and brain, and occasionally of other sites, such as the throat, lungs or large joints.
Five cases of invasive meningococcal disease have been reported in 2025. In 2024, a total of 13 meningococcal cases were reported and there was one death.
There are two types of meningococcal vaccine available: one protects against four serogroups of the meningococcal disease (serogroups A, C, W and Y) and the other protects against serogroup B.
The MenACWY vaccine is offered free to all children at 12 months of age. In addition, the MenACWY vaccine is offered to all Year 10 students, with a free catch-up program for adolescents aged 15 to 19 years old.
Due to a higher rate of meningococcal disease in Aboriginal children in WA, the MenACWY vaccine is offered free to Aboriginal children aged from six weeks to 12 months old.
The MenB vaccine is free for all Aboriginal children aged up to two years old. Both these vaccines are also free for people of all ages with certain medical risk conditions. People not eligible for free vaccines can request them through their immunisation provider for a fee.
Meningococcal bacteria are not easily spread from person-to-person. The bacterium is present in droplets discharged from the nose and throat when coughing or sneezing but is not spread by saliva and does not survive more than a few seconds in the environment.
Meningococcal bacteria are carried harmlessly in the back of the nose and throat by about 10-20 percent of the population at any one time. Very rarely, the bacteria invade the bloodstream or tissues and cause serious infections.
Sometimes – but not always – symptoms may be accompanied by the appearance of a spotty red-purple rash that looks like small bleeding points beneath the skin or bruises.
Symptoms of invasive meningococcal disease may include high fever, chills, headache, neck stiffness, nausea and vomiting, drowsiness, confusion, and severe muscle and joint pains. Young children may not complain of symptoms, so fever, pale or blotchy complexion, vomiting, lethargy (inactivity), poor feeding and rash are important signs.
Although meningococcal infection is treatable with antibiotics, it can progress very rapidly, so it is important that anyone with these symptoms seek medical attention urgently.
With appropriate treatment, most people with the disease recover, although around five to 10 per cent will die and around 15 percent may experience long-term complications such as hearing loss, limb amputations or brain damage.
