Cases of aseptic meningitis after vaccination against mumps in Russia (2009-2019).

OBJECTIVES: Mumps is a highly contagious viral infection prevented by immunization with live attenuated vaccines. Mumps vaccines have proven to be safe and effective; however, rare cases of aseptic meningitis (AM) can occur after vaccination. The range of meningitis occurrence varies by different factors (strain, vaccine producer, and so on). Monovaccines or divaccines (mumps-measles vaccine), prepared from the strain Leningrad-3 (L-3), are used in Russia. Meningitis occurrence after vaccination has been established previously as very low. Nevertheless, with the number of children being vaccinated every year, vaccine-associated AM cases still occur. There is no official statistics on AM incidence after mumps vaccines, and information on AM features as an adverse event of mumps vaccination is limited and mostly devoted to vaccines, prepared from strains other than L-3. STUDY DESIGN: The study included patients with AM who were vaccinated against mumps in the previous 30 days before the present disease onset during 2009-2019. METHODS: Patients admitted to Infectious Clinical Hospital No. 1, Moscow, Russia, with AM were observed by a pediatrician and were screened for etiological agents of meningitis. RESULTS: Seven patients were enrolled, and clinical features and the course of infection are presented. CONCLUSIONS: Detection of only 7 cases of AM associated with mumps vaccination during the 10-year period supports very low occurrence of this adverse event after immunization with the L-3 strain-based mumps vaccines. Nevertheless, the annual number of AM cases that occur after mumps vaccination remains unknown and poorly diagnosed in practice because of the low awareness of physicians of this adverse reaction. Detection and objective coverage of such cases can lead to a weakening of 'antivaccination' moods in a society and to restoration of confidence in the healthcare system.

[Viral meningoencephalitis with damage to the right temporal lobe with a favorable outcome]. / Virusnyi meningoentsefalit s porazheniem pravoi visochnoi doli s blagopriyatnym iskhodom.

Herpes simplex virus (HSV) is the most commonly identified cause of infectious meningoencephalitis in Western countries. Previous studies showed that neurological defects can form during HSV meningoencephalitis, ranging from symptomatic epilepsy to mental and movement disorders. The recovery of Cognitive Mental Functions (CMF) in a patient who survived HSV meningoencephalitis was evaluated. The results were compared with MRI and EEG data. A follow-up observation of the patient was carried out for more than 1 year. During the observation period, the patient showed improvement of CMF, while MRI scans showed no observable improvement. Current neuropsychological methods give enough information for the assessment of CMF in patients after neurological infections and are essential for evaluating new treatment methods and monitoring of possible deterioration or relapse.