Vector competence experiments with Rocio virus and three mosquito species from the epidemic zone in Brazil

Revista de Saúde Pública

Carl J. Mitchell²  Oswaldo Paulo Forattini¹  Barry R. Miller² 

[1] ,U.S. Departmente of Health and Human Services Public Health Service Centers for Disease ControlFort Collins Colorado ,USA

关键词: Encephalitis viruses;    Psorophora ferox;    Aedes scapularis;    Aedes serratus;    Insect vectors;    Encephalitis;    epidemic;    Arbovirus infection;    Vírus da encefalite;    Psorophora ferox;    Aedes scapularis;    Aedes serratus;    Insetos vetores;    Encefalite epidêmica;    Arboviroses;   

DOI  :  10.1590/S0034-89101986000300001

来源: SciELO

【 摘 要 】

First-generation progeny of field-collected Psorophora ferox, Aedes scapularis, and Aedes serratus from the Rocio encephalitis epidemic zone in S.Paulo State, Brazil, were tested for vector competency in the laboratory. Psorophora ferox and Ae. scapularis are susceptible to per os infection with Rocio virus and can transmit the virus by bite following a suitable incubation period. Oral ID50S for the two species (10(4.1) and 10(4.3) Vero cell plaque forming units, respectively) did not differ significantly. Infection rates in Ae. serratus never exceeded 36%, and, consequently, an ID50 could not be calculated for this species. It is unlikely that Ae. serratus is an epidemiologically important vector of Rocio virus. The utility of an in vitro feeding technique for demonstrating virus transmission by infected mosquitoes and difficulties encountered in working with uncolonized progeny of field-collected mosquitoes are discussed.

【 授权许可】

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