Meningococcal Disease Cases in Chicago Lead to Two Deaths

Chicago health authorities have identified multiple cases of meningococcal disease since the beginning of the year, resulting in two fatalities and prompting public health measures.

The Chicago Department of Public Health reported that seven individuals have been diagnosed with Neisseria meningitidis infections in the city since mid-January. The department stated that two of these cases resulted in death, and officials traced close contacts of those affected.

Preventive antibiotics were administered to individuals who had been exposed to confirmed cases, according to the Chicago Department of Public Health. Health officials also monitored those who received antibiotics to help prevent further transmission of the disease.

Meningococcal disease is caused by the bacterium Neisseria meningitidis, which can infect the bloodstream or the membranes surrounding the brain and spinal cord. The infection can be transmitted through saliva or mucus during close or extended contact, such as sharing drinks, kissing, or being exposed to coughs and sneezes.

What the numbers show

• Seven meningococcal cases identified in Chicago since mid-January
• Two deaths reported among these cases
• Chicago typically sees 10 to 15 cases per year, mostly in winter
• 503 confirmed and probable U.S. cases reported by CDC in 2024

Symptoms of meningococcal disease may include fever, headache, nausea, vomiting, diarrhea, sensitivity to light, stiff neck, and a skin rash that can appear as dark spots or bruises. The disease can progress rapidly, making early recognition and treatment important.

According to the Centers for Disease Control and Prevention, there have been 503 confirmed and probable cases of meningococcal disease in the United States in 2024, based on preliminary data. Chicago’s annual case numbers typically range from 10 to 15, with most cases occurring in the winter months.

The CDC Health Alert Network has advised the public to seek immediate medical attention if symptoms of meningococcal disease develop. The guidance also lists specific symptoms for both meningitis and bloodstream infection caused by Neisseria meningitidis.

Healthcare providers have been advised by the CDC Health Alert Network to maintain a heightened awareness for invasive meningococcal disease. The guidance recommends starting antibiotic treatment promptly, ensuring vaccinations are current, and submitting bacterial isolates for sequencing.

* This article is based on publicly available information at the time of writing.