1
|
da Cunha TCADS, da Silva FS, da Silva SP, Ribeiro Cruz AC, Paiva FADS, Casseb LMN, do Nascimento ADNS, de Oliveira IAS, Branco MDAC, de Oliveira RAB, Durans DDBS, da Paz TYB, Coelho TFSB. Phylogenetic analysis of rabies surveillance samples from north and northeast Brazil. Front Vet Sci 2023; 10:1257558. [PMID: 37841469 PMCID: PMC10570608 DOI: 10.3389/fvets.2023.1257558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/01/2023] [Indexed: 10/17/2023] Open
Abstract
Viruses of the Lyssavirus genus are classified into several genotypes (GT1 to GT7), of which only GT1 (classic rabies virus-RABV) has a cosmopolitan distribution and circulates in Brazil. GT1 is subdivided into several antigenic variants (AgV) maintained in independent cycles with a narrow host range and distinct geographic distributions, namely, AgV1 and AgV2 found in dogs, AgV3 in the vampire bats Desmodus rotundus, and AgV4 and AgV6 in bats non-hematophagous Tadarida brasiliensis and Lasiurus cinereus, a common variant of marmoset (Callithrix jacchus), and crab-eating fox (Cerdocyon thous). In this study, we performed phylogenetic analysis to identify at the antigenic variant level; six RABV genomes derived from the Rabies Surveillance in the north and northeast regions of Brazil. The analysis resulted in the formation of 11 monophyletic clusters, each corresponding to a particular variant, with high bootstrap support values. The samples were positioned inside the AgV3, AgV6, and Callithrix variant clades. This is the first report of the AgV6 variant found in northern Brazil, which provides valuable information for rabies surveillance in the country. The possibility of viral spillover has been much debated, as it deals with the risk of shifting transmission from a primary to a secondary host. However, more genomic surveillance studies should be performed, with a greater number and diversity of samples to better understand the transmission dynamics of each variant to detect changes in its geographic distribution and spillover events.
Collapse
Affiliation(s)
| | - Fábio Silva da Silva
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ananindeua, PA, Brazil
| | - Sandro Patroca da Silva
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ananindeua, PA, Brazil
| | - Ana Cecília Ribeiro Cruz
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ananindeua, PA, Brazil
| | | | | | | | | | | | | | | | - Thito Yan Bezerra da Paz
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute, Ananindeua, PA, Brazil
| | | |
Collapse
|