First Episodes of Norovirus and Sapovirus Gastroenteritis Protect Against Subsequent Episodes in a Nicaraguan Birth Cohort.
Epidemiology
; 33(5): 650-653, 2022 09 01.
Article
de En
| MEDLINE
| ID: mdl-35700200
ABSTRACT
BACKGROUND:
Norovirus and sapovirus cause a large burden of acute gastroenteritis (AGE) in young children. We assessed protection conferred by norovirus and sapovirus AGE episodes against future episodes.METHODS:
Between June 2017 and July 2018, we recruited 444 newborns in León, Nicaragua. Weekly household surveys identified AGE episodes over 36 months, and AGE stools were tested by reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) for norovirus genogroup (G)I/GII and sapovirus. We used recurrent-event Cox models and negative control methods to estimate protection conferred by first episodes, controlling for observed and unobserved risk factors, respectively.RESULTS:
Sapovirus episodes conferred a 69% reduced hazard of subsequent episodes using the negative control method. Norovirus GI (hazard ratio [HR] = 0.67; 95% confidence interval [CI] = 0.31, 1.3) and GII (HR = 0.20; 95% CI = 0.04, 0.44) episodes also appeared highly protective. Protection against norovirus GII was enhanced following two episodes.CONCLUSIONS:
Evidence of natural immunity in early childhood provides optimism for the future success of pediatric norovirus and sapovirus vaccines.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Infections à Caliciviridae
/
Norovirus
/
Sapovirus
/
Gastroentérite
Type d'étude:
Prognostic_studies
/
Risk_factors_studies
Limites:
Child, preschool
/
Humans
/
Infant
/
Newborn
Pays/Région comme sujet:
America central
/
Nicaragua
Langue:
En
Journal:
Epidemiology
Sujet du journal:
EPIDEMIOLOGIA
Année:
2022
Type de document:
Article
Pays d'affiliation:
Nouvelle-Calédonie
Pays de publication:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA