A case report of breakthrough infection with the SARS-CoV-2 delta variant and household transmission : Role of vaccination, anti-spike IgG and neutralizing activity

Copyright © 2022 Japanese Society of Chemotherapy and The Japanese Association for Infectious Diseases. Published by Elsevier Ltd. All rights reserved..

There have been several reports of breakthrough infections, which are defined as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections among individuals who had received at least two doses of vaccine at least 14 days before the onset of infection, but data on the antibody titers, including SARS-CoV-2 neutralizing antibody activity, and the clinical course of individuals with breakthrough infections are limited. We encountered a case of breakthrough infection with the SARS-CoV-2 delta variant in a 31-year-old female healthcare worker (the index case, Case 1) and a secondary case (Case 2) in her unvaccinated 33-year-old husband. We studied the role of the anti-spike immunoglobulin G (IgG) and neutralizing antibody activity in the two case patients. Case 1 had high anti-spike IgG detected on day 3 of the illness, with low neutralizing antibody activity. The neutralizing antibody activity started to increase on day 5 of the illness. In Case 2 both the anti-spike IgG and the neutralizing antibody activity remained low from days 4-11 of illness, and the anti-spike IgG gradually increased from day 9. In Case 1, the fever broke within 4 days of onset, coinciding with the rise in neutralizing antibodies, whereas the fever took 7 days to resolve in Case 2. SARS-CoV-2 infection can occur even in vaccinated individuals, but vaccination may contribute to milder clinical symptoms because neutralizing antibodies are induced earlier in vaccinated individuals than in unvaccinated individuals.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:28

Enthalten in:

Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy - 28(2022), 7 vom: 01. Juli, Seite 962-964

Sprache:

Englisch

Beteiligte Personen:

Moriyama, Yuki [VerfasserIn]
Ishikane, Masahiro [VerfasserIn]
Ueno, Mikako [VerfasserIn]
Matsunaga, Akihiro [VerfasserIn]
Ishizaka, Yukihito [VerfasserIn]
Arashiro, Takeshi [VerfasserIn]
Kanno, Takayuki [VerfasserIn]
Suzuki, Tadaki [VerfasserIn]
Kimura, Kenjiro [VerfasserIn]

Links:

Volltext

Themen:

Anti-spike IgG
Antibodies, Neutralizing
Antibodies, Viral
BNT162b2 vaccine
Breakthrough infection
COVID-19 Vaccines
Case Reports
Delta variant
Immunoglobulin G
Journal Article
Neutralizing antibodies
SARS-CoV-2 infection

Anmerkungen:

Date Completed 12.05.2022

Date Revised 16.07.2022

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jiac.2022.02.003

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM339908823