RESUMO
Congenital respiratory viral infection is followed in the CNS of fetuses and newborns by grave dyscirculatory disturbances with glia proliferation and nervous tissue edema. The process is mainly localized in the periventricular regions of the brain ventricles. Neurologic and morphologic consequences of these damages in the CNS of fetuses and newborns need further studies.
Assuntos
Infecções do Sistema Nervoso Central/congênito , Doenças Fetais/virologia , Transmissão Vertical de Doenças Infecciosas , Complicações Infecciosas na Gravidez/virologia , Infecções por Vírus Respiratório Sincicial/congênito , Infecções do Sistema Nervoso Central/patologia , Infecções do Sistema Nervoso Central/transmissão , Infecções do Sistema Nervoso Central/virologia , Feminino , Doenças Fetais/patologia , Humanos , Recém-Nascido , Gravidez , Complicações Infecciosas na Gravidez/patologia , Infecções por Vírus Respiratório Sincicial/patologia , Infecções por Vírus Respiratório Sincicial/transmissãoRESUMO
Electron microscopy of the placentas affected by respiratory-syncytial virus and mycoplasmas (Mycoplasma urealyticum) revealed the most pronounced alterations in the syncytiotrophoblast structures. Destructive changes in the respiratory-syncytial infection were associated with a direct reproduction of viral particles. Two types of alterations (acute and long-lasting) reflecting two stages of the infectious process are reported in the Mycoplasma infection.
Assuntos
Infecções por Mycoplasma/patologia , Doenças Placentárias/patologia , Infecções por Vírus Respiratório Sincicial/patologia , Feminino , Humanos , Microscopia Eletrônica , Gravidez , Replicação Viral/fisiologiaRESUMO
The ultrastructural study of fetal and newborn lungs in the intrauterine infection caused by respiratory viruses showed the virus reproduction to take place in type II alveolocytes with destructive changes in cell organelles. Each type of virus results in a certain picture of ultrastructural changes. Progressing cell organelles destruction with an intensive cytoplasm vacuolization and virion presence in the cytoplasmic matrix and on the endoplasmic network membranes is characteristic for influenza. Severe cytoplasm vacuolization with lipid formation, homogenization and condensation of membranous bodies, nuclear pyknosis are observed in parainfluenza. RS-infection is characterized by virion formation on the cytoplasmic cell membrane, numerous deformed membranous bodies, filling intercellular spaces and alveolar lumen with rough granular electron-dense material, massive release of organelles into the alveolar lumen. Edema and vacuolization of endothelium, edema and focal disappearance of basal membrane are observed in the capillary walls.