vaccines
infectious diseases and types of chemicals
Nutritional diseases are not classified as infectious disease because they do not fit the definition of 'infectious'. They cannot be transmitted from one person to another and the causative agents come from the environment.
Infectious diseases are those diseases which are caused by infectious agents (which include microorganisms such as bacteria, fungi, protozoa and virus, as well as some multicellular animals such as worms) and hence they are the ones which can spread from one person to another. Non-infectious diseases are those diseases that are not caused by infectious agents and do not spread from one person to another.
As the list of pathologies and infectious agents are extensive, a related link is shown below.Once the web page is open, click on Figure 10.3. A table is displayed showing the main infectious agents and the pathologies they cause.
Madeline Drexler has written: 'Secret agents' -- subject(s): Communicable diseases, Emerging infectious diseases, Epidemiology, Popular works
Prions are the smallest known infectious agents.
Unicellular infectious agents are prokaryotes, eukaryotes, bacteria, and protoza.
A few infectious agents -- notably human papillomavirus and hepatitis B virus -- are associated with neoplasm. In addition, some infections, like HIV, can predispose to cancer.
Cervical lymphadenopathy is a condition with a broad differential diagnosis. Malignant tumors, allergic reactions, autoimmune diseases as well as various infectious agents can be the cause.
Infectious diseases are those diseases which are caused by infectious agents (which include microorganisms such as bacteria, fungi, protozoa and virus, as well as some multicellular animals such as worms) and hence they are the ones which can spread from one person to another. Non-infectious diseases are those diseases that are not caused by infectious agents and do not spread from one person to another.
By coming in direct contact with people that have the disease, or if the nature of the illness is such that the infectious agent can survive outside the body by making contact with those infectious agents where they are left by the carriers of the disease.
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