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Ilheus Virus (ILHV) Resistance in Culex quinquefasciatus from the Northern Region of Brazil.
Life 2024 March 23
BACKGROUND: Orthoflavivirus ilheusense (ILHV) is a member of the Flaviviridae family. It was first isolated in 1944 from pools of Aedes serratus and Psorophora ferox mosquitoes; however, it has also been detected in species of the genus Culex , such as Cx . portesi and Cx . coronator . The objective of this study was to examine the vector competence of Cx . quinquefasciatus mosquitoes to ILHV infection and the subsequent transmission of the virus through their saliva during feeding on blood.
METHODS: F1 generation females of Cx . quinquefasciatus (Ananindeua/PA) were orally infected with goose blood infected with strain BeH7445, and body, head and saliva samples were analyzed at 7, 14, and 21 dpi using the techniques of virus isolation in cells and indirect immunofluorescence.
RESULTS: The presence of ILHV was not detected in the body and head samples of Cx . quinquefasciatus females at any of the three dpi's analyzed, indicating that the lineage of mosquitoes analyzed was resistant to ILHV.
CONCLUSIONS: According to the results obtained in this study, the species Cx . quinquefasciatus proved resistant to ILHV, regardless of the virus titers to which it was exposed, which suggests the possibility that this species does not act as a vector in the ILHV transmission cycle.
METHODS: F1 generation females of Cx . quinquefasciatus (Ananindeua/PA) were orally infected with goose blood infected with strain BeH7445, and body, head and saliva samples were analyzed at 7, 14, and 21 dpi using the techniques of virus isolation in cells and indirect immunofluorescence.
RESULTS: The presence of ILHV was not detected in the body and head samples of Cx . quinquefasciatus females at any of the three dpi's analyzed, indicating that the lineage of mosquitoes analyzed was resistant to ILHV.
CONCLUSIONS: According to the results obtained in this study, the species Cx . quinquefasciatus proved resistant to ILHV, regardless of the virus titers to which it was exposed, which suggests the possibility that this species does not act as a vector in the ILHV transmission cycle.
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