Household transmission of SARS-CoV-2 infection in the Paris/Ile-de-France area.
Eur J Clin Microbiol Infect Dis
; 41(3): 445-454, 2022 Mar.
Article
in English
| MEDLINE | ID: covidwho-1611417
ABSTRACT
This st udy aims to evaluate the prevalence of SARS-CoV-2 antibodies in locked-down family households to determine viral dynamics and immunity acquisition. COVID-19 individuals and their households in lockdown under the same roof during early spring 2020 were interviewed and tested using rapid immunochromatographic lateral flow antibodies assays (LFA) between July and September 2020. Outcomes were secondary infection rate (SIR) among contacts, household infection rate, and predictors of transmission. We enrolled 87 households including 87 COVID-19 index cases (female 78.2%; median age 47.0 years, IQR 42.0-51.5) and 255 contacts (males 52.9%; median age 19.0 years, IQR 11.0-43.5) consisting of their children (42%) or spouses/partners (28.2%). A total of 95/255 contacts were SARS-CoV-2 antibody positive leading to a SIR of 37.3% (95% confidence interval (CI) 31.3-43.5%). Viral transmission was observed in 54 households (62%). SARS-CoV-2 infection was asymptomatic in 33/95 (34.7%) of SARS-CoV-2-positive contacts. Independent predictors of virus transmission from index to contacts were housing surface area < 60 m2 (OR 5.6 [1.1; 28.2] and a four-member family compared to five (OR 3.6 [1.2; 10.3]). Households represent a high-risk setting for SARS-CoV-2 transmission through close contact within the family amplified by the number of family members and the housing surface area.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
COVID-19
Type of study:
Experimental Studies
/
Observational study
/
Prognostic study
Limits:
Adult
/
Child
/
Female
/
Humans
/
Male
/
Middle aged
/
Young adult
Country/Region as subject:
Europa
Language:
English
Journal:
Eur J Clin Microbiol Infect Dis
Journal subject:
Communicable Diseases
/
Microbiology
Year:
2022
Document Type:
Article
Affiliation country:
S10096-021-04345-9
Similar
MEDLINE
...
LILACS
LIS