Henrique da Mota Silveira

Learn More
A new genus, Vittaforma n.g. is proposed for the human microsporidium Nosema corneum Shadduck, Meccoli, Davis & Font, 1990, based on the ultrastructure of developmental stages in the liver of experimentally infected athymic mice. The diplokaryotic arrangement of the nuclei is the only character that conforms with the description of the genus Nosema.(More)
Athymic mice (BALB/c nu/nu/Ola/Hsd) were experimentally infected intraperitoneally with Nosema corneum spores. Infection was monitored in the first and second weeks post-infection. The liver, spleen, kidney, intestine, lung, heart, brain and eye were collected. Quantification of infection in each organ using three different techniques gave approximately the(More)
When in vitro growth of Vittaforma corneae was tested using MDCK, MRC-5, XEN, L-929 and FHM cell lines, propagation occurred only in MDCK, MRC-5 and XEN cells. The intervals required for the various stages of the life cycle to develop were the same in all the cell lines tested. The MDCK cell line was selected to support the growth of V. corneae in vitro and(More)
Arylsulphatase and acid phosphatase activity were demonstrated cytochemically in spermatozoa of the marine musselMytilus edulis. Reaction product resulting from arylsulphatase activity was measured using an integrating microdensitometer and found to increase with incubation time and to be variable according to the pH of the incubation medium. Two peaks in(More)
This paper brings to light an important discussion on how to create better assistive technologies for visually impaired people with the new advances in the computer vision field. Until very recently, assistive technology solutions required large and expensive hardware, as well as complex software. However, this scenario seems to be changing with web(More)
  • 1