Virulent
A viroid is an infectious agent that consists of a small strand of RNA and that causes disease in plants.
Asthma is not infectious disease. It does not spread from one person to other person.
Cystic fibrosis is not an infectious disease but a genetic disease, provoked by mutations fo the CFTR gene, mainly inherited.
1. Pathogens. Castle Learning cheating ftw
A prion is a small infectious particle that contains a misfolded protein. These contain no DNA or RNA. These cause Creutzfeldt-Jakob disease, Scrapie in sheep and Kuru. These are deadly and progressive nerve wasting diseases.A plant pathologist discovered an infectious RNA particle smaller than a virus that causes diseases in plants. He called it a viroid. Millions each year are lost by these viroids. These contain only RNA.These two are the smallest infectious particles. They are not called microorganisms because they are not alive any more than viruses are.
A pathogen causes infectious disease. For instance, influenza virus is the pathogen that causes flu.
A viroid is an infectious agent that consists of a small strand of RNA and that causes disease in plants.
Its called "pathogen".
Asthma is not infectious disease. It does not spread from one person to other person.
Botulism
infectious proteins called prions
An infectious agent is a pathogen (germ). There are six kinds of infectious agents.Here they are listed:BactiriaVirusFungiHelminthPrionProtizoa.
Infectious diseases involve a causative organism, from groups such as bacteria, viruses, fungi, and such. Noninfectious diseases involve causes other than specific infectious organisms.
Not directly, but the infectious microorganism that causes the disease may produce a toxin that is the cause of some of the disease's symptoms. Not every disease causing microorganism produces a toxin.
There are several different specific microbes that are identified to be the source of infectious diseases. The Rhinovirus causes colds. Varicella zoster causes chicken pox. Rubella causes German measles. Bordatella pertussis causes whooping cough. Yersinia pestis causes the Bubonic plague.
The flu viruses cause the infectious respiratory disease known as influenza.
The bacterium that causes and spreads the Cholera disease is Vibro Cholerae.