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Meningitis
| Generalities | |
|---|---|
| Agent | There are several agents causing meningitis. 1) Main Bacteria: - Neisseria meningitidis (meningococcus): Gram negative diplococci. Main invasive serotypes are A, B, C, W135, X, and Y. - Haemophilus influenza: Gram negative cocco-bacilli. There are 6 serotypes from (a) to (f). The serotype (b) is responsible of invasive infection. - Streptococcus pneumonia (pneumococcus): Gram positive diplococci. There are more than 90 serotypes. - Leptospira: spirochetes, Leptospira interrogans (26 serogroups) - Listeria monocytogenes: Gram positive, rod-shapped - Other bacterial agents: Staphylococcus, enteric bacteria, group B streptococci, Mycobacterium tuberculosis… 2) Virus: - Mumps - Measles - West Nile virus: a Flavivirus - Enterovirus: including Coxsackieviruses A (2-4, 7, 9-10), Coxsackieviruses B (1-6), Echoviruses (2, 5-7, 9-11, 14, 18, 30), Enterovirus 71, Poliovirus (1-3) - Herpes Simplex virus (types 1 and 2): family Herpesviridae - Varicella-Zoster virus: Human (alpha) Herpesvirus 3 (varicella-zoster) from the group Herpesvirus - Adenovirus: Adenovirus, several types (1, 2, 3, 4, 5 and 7), genus Mastadenovirus, family Adenoviridae, - Lymphocytic choriomeningitis virus: an Arenavirus - Sandfly fever viruses: genus Phlebovirus, family Bunyaviridae. They include more than 60 antigenically distinct virus serotypes. Two main groups are identified: a) Sandfly fever group including the Naples serocomplex (Karimabad virus, Arabia virus, Massilia virus, Punique virus, Tehran virus, Toscana virus …) and Sicilian serocomplex; and b) Uukuniemi group -Other virus: arboviruses… 3) Parasites: - Candida albicans, cryptococcus… |
| Incubation period | varies with the agent |
| Period of transmissibility | varies with the agent |
| Reservoir | varies with the agent |
| Modes of transmission | varies with the agent |
| Clinical presentation | varies with the agent |
| Resources | |
| Case definition | - MOPH circular no. 52 (2007): Meningitis - MOPH circular no. 63 (2007): Neisseria meningitidis - MOPH circular no. 54 (2007): Haemophilus influenzae b - MOPH circular no. 36 (2012): West Nile Virus |
| Forms | - Meningitis reporting form - Meningitis investigation form |
| Data | - Weekly report |
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