Emergence of New SARS-CoV2 Omicron Variants after the Change of Surveillance and Control Strategy.
Microorganisms
; 10(10)2022 Sep 30.
Article
in English
| MEDLINE | ID: covidwho-2066268
ABSTRACT
In January 2022, there was a global and rapid surge of the Omicron variant of SARS-CoV-2 related to more transmission. This coincided with an increase in the incidence in Asturias, a region where rapid diagnosis and containment measures had limited the circulation of variants. METHODS:
From January to June 2022, 34,591 variants were determined by the SNP method. From them, 445 were characterized by the WGS method and classified following pangolin program and phylogenic analysis.RESULTS:
The Omicron variant went from being detected in 2438 (78%) samples in the first week of January 2021 to 4074 (98%) in the third week, according to the SNP method. Using the WGS method, 159 BA.1 (35.7%), 256 BA.2 (57.6%), 1 BA.4 (0.2%) and 10 BA.5 (2.2%) Omicron variants were found. Phylogenetic analysis detected that three new sub-clades, BA.2,3.5, BA.2.56 and BF1, were circulating.CONCLUSIONS:
The increase in the incidence of SARS-CoV2 caused the circulation of new emerging variants. Viral evolution calls for continuous genomic surveillance.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Type of study:
Observational study
Topics:
Variants
Language:
English
Year:
2022
Document Type:
Article
Affiliation country:
Microorganisms10101954
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