A virus.
Viruses
pathogen
A virus
Pathogenicity is the ability of an organism to cause disease.
A pathogen is a microorganism that causes disease such as bacterium and viruses. All viruses are pathogens, which means they all cause disease it causes disease But a pathogen is a living organism and a viru s is not so its really argumentive.
A pathogen = a virus. An organism, macro or micro, is alive, but viruses cannot technically be considered 'living.' Thus, non-pathogenic means 'not a virus'.
Anything that causes disease is considered to be pathogenic. This includes viruses and bacteria. People who come in contact with certain of these organisms may become very ill.
A pathogen (being something living from the goodness a body example: a tic living from a dog) 3 ways it can effect the host is: * disease of the host as the pathogen carried disease. * malnutrition of the host as the host can become weak due to the pathogen surviving from the hosts body. Example would be iron deficiency in the host, due to the pathogen using the hosts blood to live on * finally death of the host.
Tuberculosis, Elephantiasis, African trypanosomiasis (Sleeping Sickness)
An agent that causes disease, especially a living microorganism such as a bacterium
Viruses are the only non-biological infectious agents; all otheres are forms of pathogen, which are bacteria.