Bacterial meningitis

Bacterial meningitis is inflammation of the meninges, the protective membranes covering the brain and spinal cord, due to bacterial infection ^[1]. It is a form of meningitis in which a bacterial cause is established or suspected on clinical and laboratory grounds, with cerebrospinal fluid culture and/or PCR testing used to confirm a definitive case ^[2]. The source material does not provide further taxonomy or pathogen-specific definitions for this profile ^[3][2].

The syndrome is associated with acute inflammation of the central nervous system coverings and can be life-threatening because of its proximity to the brain and spinal cord ^[1][4]. Reported manifestations of meningitis include fever, intense headache, vomiting, neck stiffness, photophobia, confusion or altered consciousness, nausea, and intolerance to loud noises ^[4]. In adults, severe headache and neck stiffness are emphasized, while the classic triad of neck stiffness, sudden high fever, and altered mental status is present in only a minority of bacterial cases ^[4]. Community-acquired bacterial meningitis may leave substantial long-term neurologic sequelae even after antibiotic treatment ^[2].

The available sources characterize community-acquired bacterial meningitis as a serious disease with a high fatality rate ^[2]. No location-specific incidence, seasonality, outbreak pattern, or surveillance burden figures are provided in the source snippets ^[3][2]. The material does indicate that bacterial causes vary by age group, but the specific age-stratified distribution is not detailed here ^[4].

Transmission-specific detail is not well characterized in the provided snippets for this profile. The sources state that meningitis may follow bacterial infection, and that some cases can arise after head injury, from devices in the brain and meninges, or from head and neck infections such as otitis media or mastoiditis, but they do not give a single general route of spread for bacterial meningitis overall ^[4]. Source-backed detail on person-to-person transmission, carriage, or persistence is not yet available ^[4][2].

The source material identifies adults at higher risk as a group for whom vaccination should be encouraged, but it does not specify the exact risk factors within that category ^[2]. It also notes increased risk in people with head injury, implanted brain or meningeal devices such as shunts or drains, and people with impaired immune systems ^[4]. Additional source-backed risk-group detail is not yet available ^[3][2][4].

Vaccination is described as an important tool to reduce the risk of bacterial meningitis, and use is encouraged among adults at higher risk ^[2]. The source material also notes that antibiotics given to people with significant exposure to certain types of meningitis may help prevent transmission, but it does not specify which exposure scenarios or regimens apply here ^[4]. No additional exposure-control measures are supported by the provided snippets ^[2][4].

For surveillance purposes, bacterial meningitis should be read as an urgent invasive neurologic infection in which laboratory confirmation depends on cerebrospinal fluid culture and/or PCR testing ^[2]. The literature cited here also stresses that antibiotic treatment should not be delayed while waiting to obtain lumbar puncture material, which underscores the need to separate case confirmation from immediate clinical response ^[2]. Because source-backed epidemiologic detail is limited, monitoring should focus on confirmed cases, severe presentations, and any reported long-term sequelae ^[2].

1. 1 Wikidata contributors. bacterial meningitis [Internet]. Wikidata. cited 20 May 2026. Available from: https://www.wikidata.org/wiki/Q3678510
2. 2 Bulaeva A et al. Bacterial Meningitis. Med Clin North Am. 2025 May. PMID: 40185548. doi: 10.1016/j.mcna.2024.12.012. PubMed: https://pubmed.ncbi.nlm.nih.gov/40185548/
3. 3 van de Beek D et al. ESCMID guideline: diagnosis and treatment of acute bacterial meningitis. Clin Microbiol Infect. 2016 May. PMID: 27062097. doi: 10.1016/j.cmi.2016.01.007. PubMed: https://pubmed.ncbi.nlm.nih.gov/27062097/
4. 4 Wikipedia contributors. Meningitis - Wikipedia [Internet]. Wikipedia. cited 20 May 2026. Available from: https://en.wikipedia.org/wiki/Meningitis
5. 5 Cook AM et al. Guidelines for the Acute Treatment of Cerebral Edema in Neurocritical Care Patients. Neurocrit Care. 2020 Jun. PMID: 32227294. doi: 10.1007/s12028-020-00959-7. PubMed: https://pubmed.ncbi.nlm.nih.gov/32227294/

ICD-10

ICD-11

Total cases

446K

Peak month

2007-11

Coverage

2 reporting countries · 2007-01-01 → 2026-06-20