A group of pathogens comprising the smallest known agents of infectious disease. They are unencapsulated and are capable of replicating autonomously in susceptible cells. Positively identified viroids composed of single-stranded RNA have been isolated from higher plants, but the existence of DNA viroids pathogenic to animals is suspected. ... (12 D...
Found on
http://www.encyclo.co.uk/local/20973
Small virus-like particles. A term used often in TSE to get around the fact that the infective agent is not yet known.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.
