RESUMO
We report transovarial transmission of Gamboa virus (Bunyavirus) in Aedeomyia squamipennis, a tropical mosquito which is active and bloodfeeding throughout the year. Gamboa virus was isolated during each of the 28 months of the study from every mosquito stage, including eggs, demonstrating that vertical transmission is a maintenance mechanism of this virus. The overall minimum infection rate was 5.1/1,000 mosquitoes. Identification of the 567 isolates by neutralization indicated that greater than or equal to 2 serotypes or subtypes of Gamboa virus circulate at the study site.
Assuntos
Bunyaviridae/fisiologia , Culicidae/microbiologia , Animais , Bunyaviridae/classificação , Bunyaviridae/isolamento & purificação , Culicidae/crescimento & desenvolvimento , Feminino , Larva/microbiologia , Masculino , Óvulo/microbiologia , Panamá , Pupa/microbiologia , Estações do Ano , SorotipagemRESUMO
This paper describes a case of severe encephalitis in a 3-year-old Panamanian boy infected with the Indiana serotype of vesicular stomatitis virus. The virus was recovered from the child's throat on the fifth day of illness and a rise in neutralizing antibody titer was demonstrated in paired serum specimens. This is the second report of childhood encephalitis associated with vesicular stomatitis virus infection. These suggest that infection with vesicular stomatitis viruses may cause severe disease. Human infection with vesicular stomatitis viruses is common throughout the tropical Americas.
Assuntos
Meningoencefalite/etiologia , Viroses , Pré-Escolar , Humanos , Masculino , Faringe/microbiologia , Vírus da Estomatite Vesicular Indiana/isolamento & purificação , Viroses/microbiologiaAssuntos
Bunyaviridae/crescimento & desenvolvimento , Culicidae/microbiologia , Insetos Vetores/microbiologia , Animais , Aves/microbiologia , Bunyaviridae/isolamento & purificação , Culicidae/crescimento & desenvolvimento , Feminino , Insetos Vetores/crescimento & desenvolvimento , Larva/microbiologia , Masculino , Óvulo/microbiologia , Pupa/microbiologiaAssuntos
Vírus da Encefalite de St. Louis/isolamento & purificação , Flavivirus/isolamento & purificação , Animais , Aotus trivirgatus/microbiologia , Aves/microbiologia , Cricetinae , Culicidae/microbiologia , Reservatórios de Doenças , Mesocricetus/microbiologia , Panamá , Vigilância da População , Estações do Ano , Bichos-Preguiça/microbiologiaRESUMO
The clinical and laboratory findings in ten humans infected with Venezuelan equine encephalitis virus, subtype I-D, are described in this report. Clinical and laboratory data indicate that, in contrast to equine infections, human infection with these enzootic virus strains (I-D) is similar to human infection with epizootic strains (I-ABC). In most cases there was an abrupt onset of fever, muscle pain, and vomiting. Virus was recovered from sera obtained during the first 3 days of illness. Lymphopenia occurred in all patients, and neutropenia occurred in three. No sequelae of these infections were apparent.