Safety and immunogenicity of a primary yellow fever vaccination under low-dose methotrexate therapy-a prospective multi-centre pilot study1.
J Travel Med
; 27(6)2020 Sep 26.
Article
em En
| MEDLINE
| ID: mdl-32729905
ABSTRACT
BACKGROUND:
More people on immunosuppression live in or wish to travel to yellow fever virus (YFV)-endemic areas. Data on the safety and immunogenicity of yellow fever vaccination (YFVV) during immunosuppression are scarce. The aim of this study was to compare the safety and immunogenicity of a primary YFVV between travellers on methotrexate and controls.METHODS:
We conducted a prospective multi-centre controlled observational study from 2015 to 2017 in six Swiss travel clinics. 15 adults (nine with rheumatic diseases, five with dermatologic conditions and one with a gastroenterological disease) on low-dose methotrexate (≤20 mg/week) requiring a primary YFVV and 15 age and sex-matched controls received a YFVV. Solicited/unsolicited adverse reactions were recorded, YFV-RNA was measured in serum samples on Days 3, 7, 10, 14, 28 and neutralizing antibodies on Days 0, 7, 10, 14, 28.RESULTS:
Patients´ and controls' median ages were 53 and 52 years; 9 patients and 10 controls were female. 43% of patients and 33% of controls showed local side effects (P = 0.71); 86% of patients and 66% of controls reported systemic reactions (P = 0.39). YFV-RNA was detected in patients and controls on Day 3-10 post-vaccination and was never of clinical significance. Slightly more patients developed YFV-RNAaemia (Day 3 n = 5 vs n = 2, Day 7 n = 9 vs n = 7, Day 10 n = 3 vs n = 2, all P > 0.39). No serious reactions occurred. On Day 10, a minority of vaccinees was seroprotected (patients n = 2, controls n = 6). On Day 28, all vaccinees were seroprotected.CONCLUSIONS:
First-time YFVV was safe and immunogenic in travellers on low-dose methotrexate. Larger studies are needed to confirm these promising results.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Febre Amarela
/
Vacina contra Febre Amarela
Tipo de estudo:
Observational_studies
Limite:
Adult
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Female
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Humans
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Newborn
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article