To·ga·vir·i·dae (t  g -vîr  -d )n. A family of RNA viruses that includes the causative agents of encephalitis, rubella, yellow fever, and dengue. |
tocainide HCl (tōkā´nīd),
n brand name: Tonocard;
drug class: antidysrhythmic (Class IB), lidocaine analog;
action: decreases sodium and potassium conductance, which decreases myocardial excitability;
use: treatment of documented life-threatening ventricular dysrhythmias.
drug class: antidysrhythmic (Class IB), lidocaine analog;
action: decreases sodium and potassium conductance, which decreases myocardial excitability;
use: treatment of documented life-threatening ventricular dysrhythmias.
Togaviridae
n a family of enveloped, linear, nonsegmented RNA viruses with icosahedral symmetry, which includes the rubella and yellow fever viruses.
Togaviridae
a large family of viruses; presently two genera are defined: Alphavirus, which contains arthropod-borne viruses that cause eastern, western and Venezuelan encephalitis, and Rubivirus, which contains rubella virus of humans and is not arthropod-borne. Members of both genera have similar physicochemical properties. They are enveloped (toga = cloak) about 60 nm diameter, contain a single-stranded, plus sense RNA genome, replicate in the cytoplasm of cells and mature by budding through cytoplasmic membranes. Flaviviruses, which are also arthropod-borne, were once included in the family, but are now a separate family, Flaviviridae.
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