a vector
A pathogen is an organism that can cause a disease.
Pathogen.
It will have no direct effect on the organism ::x: It will cause a disease in the organism.
It will have no direct effect on the organism ::x: It will cause a disease in the organism.
Pathogenicity is the ability of an organism to cause disease.
A disease causing organism is called a pathogen.
vector
No, but it is caused by an organism. Influenza is the name of the infectious disease that certain viruses cause in people and other animals. The virus that causes the flu is the organism, and influenza is the disease the organism causes.
This is called a parasite. They can be a fungus such as ringworm or toenail fungus. They can be bacteria that cause disease such as cholera, pneumonia or the plague. They also can be tapeworms.
They are called carrier's.
By definition, a pathogen is an organism that causes disease. So the "problems" are dependent on the particlar organism.
I think you are referring to a bacteria or virus.