04/05/2017
MENINGITIS VACCINATION in ADOLESCENCE
This post is relevant for those parents who have adolescent children and are considering the meningitis vaccine. Vaccines are important measures, from ever perspective: prevention of illness, complications associated with illness, prevention of contagion. However, from time to time there are reports about cautions and precautions in association with vaccines. This report is one of the cautions to be exercised when giving the Menveo meningitis vaccine. If you carefully analyze the report, the association is probable but not definite and, more importantly, all cases of Bell's Palsy resolved.
Meningitis in youth is a very serious illness that can lead to death; I am familiar with one such case where an adolescent girl died as a consequence of infectious meningitis.
This report is Copyrighted by The Canadian Medical Association.
Menveo meningitis vaccine may be associated with Bell's palsy
Clinical question
Is the Menveo meningitis vaccine associated with adverse events?
Bottom line
One of the meningitis vaccines, MenACWY-CRM (Menveo), may be associated with the development of Bell's palsy, especially when given with other vaccines. The association (let alone any causative link) is not incontrovertible, but it's gotten some press. Consider giving the meningitis vaccine at a visit other than the one during which other adolescent vaccines are given. (LOE = 2b)
Reference
Tseng HF, Sy LS, Ackerson BK, et al. Safety of quadrivalent meningococcal conjugate vaccine in 11- to 21-year-olds. Pediatrics 2017;139(1):e20162084.
Synopsis
This study enrolled a cohort of members of an integrated healthcare organization in the United States that provides care to its 4.2 million members.
Over a 2-year period, 48,899 children, aged 11 to 21 years, received the meningococcal (groups A, C, Y and W-135) oligosaccharide diphtheria CRM197 conjugate vaccine (MenACWY-CRM, Menveo).
The children were evenly split by s*x and the majority were Hispanic (49.2%) or white (29.8%). For many children (42.8%), it was their second dose of vaccine. Also, 72% of the children received a concomitant vaccine.
The researchers searched payment records for any of 26 "events of interest" that might be related to vaccination, including neurologic, rheumatologic, endocrinologic, and immune-mediated adverse effects.
Overall, 1127 events occurred after vaccination. No events were recorded for 14 of the 26 categories. Events were recorded for 11 other categories, but these did not occur at a rate greater than chance. However, the risk incidence for Bell's palsy was statistically significant (adjusted risk incidence [ARI] 2.9; 95% CI 1.1 - 7.5).
When stratified, the risk was increased when the vaccine was given with other vaccines (ARI 5.0; 1.4 - 17.8), but not when given by itself (ARI 1.1; 0.2 - 5.5). All cases of Bell's palsy resolved.
Caveats: This was an observational study that showed an association that might not signal causation. We don't know the Bell's palsy incidence in a comparable unvaccinated population.The number of events is very low (8 of 48,899), which limits our confidence. The authors did not correct for multiple comparisons, creating a higher likelihood of the association being due to chance.