Duration of viral shedding and culture positivity with postvaccination SARS-CoV-2 delta variant infections.
JCI Insight
; 7(2)2022 01 25.
Article
in English
| MEDLINE | ID: covidwho-1649048
ABSTRACT
Isolation guidelines for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are largely derived from data collected prior to the emergence of the delta variant. We followed a cohort of ambulatory patients with postvaccination breakthrough SARS-CoV-2 infections with longitudinal collection of nasal swabs for SARS-CoV-2 viral load quantification, whole-genome sequencing, and viral culture. All delta variant infections in our cohort were symptomatic, compared with 64% of non-delta variant infections. Symptomatic delta variant breakthrough infections were characterized by higher initial viral load, longer duration of virologic shedding by PCR, greater likelihood of replication-competent virus at early stages of infection, and longer duration of culturable virus compared with non-delta variants. The duration of time since vaccination was also correlated with both duration of PCR positivity and duration of detection of replication-competent virus. Nonetheless, no individuals with symptomatic delta variant infections had replication-competent virus by day 10 after symptom onset or 24 hours after resolution of symptoms. These data support US CDC isolation guidelines as of November 2021, which recommend isolation for 10 days or until symptom resolution and reinforce the importance of prompt testing and isolation among symptomatic individuals with delta breakthrough infections. Additional data are needed to evaluate these relationships among asymptomatic and more severe delta variant breakthrough infections.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Virus Replication
/
Virus Shedding
/
COVID-19 Vaccines
/
SARS-CoV-2
/
COVID-19
Type of study:
Cohort study
/
Experimental Studies
/
Observational study
/
Prognostic study
Topics:
Long Covid
/
Vaccines
/
Variants
Limits:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Language:
English
Year:
2022
Document Type:
Article
Affiliation country:
Jci.insight.155483
Similar
MEDLINE
...
LILACS
LIS