I agree that infectious disease is a transmissible disease. The question is what are the differences between an infectious disease and a transmissible disease. One critical point is probably the transmission route. An infectious disease, but not all transmissible disease, is able to transmit through a natural route without human intervention.
Classical cancers are not considered as infectious diseases. All the five examples Richard provided are due to the transplantation. The transplantation is a type of human intervention. I think an infectious agent is able to infect through a natural infectious process, not through a human intervention.
Another example: In many cases, we can inject a tumor cell line into a mouse and induce cancer in the mouse. However, the tumor cell line cannot be considered as an infectious agent. So, to differentiate a transmissible disease from an infectious disease, we may need to add that an infectious disease, caused by an infectious agent, needs to infect through its own natural route, instead of through a human intervention.
If we use this definition, we can say classical cancer is not an infectious disease. Some special caners may be if they can transmit through a natural infection route.
If BSE cannot infect/transmit by itself (without human intervention) as shown in the paper Sivaram provided, it is not considered as an infectious disease but can be classified as a non-infectious transmissible disease.
As I know, some prion diseases may be infectious and so can be considered as infectious disease, for example:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Prions.html#Infectious_Prion_Diseases
However, each prion disease may need to be examined case-by-case to see if it can be transmitted by itself without human intervention.
Oliver
From: ido-d...@googlegroups.com [mailto:ido-d...@googlegroups.com]
On Behalf Of Sivaram Arabandi, MD
Sent: Wednesday, May 08, 2013 9:37 AM
To: ido-d...@googlegroups.com
Subject: Re: Issue 18 in infectious-disease-ontology: infectious agent - organisms only
> B. Kuru, BSE and scrapie are classified as transmissible spongiform
--Sivaram
> B. Kuru, BSE and scrapie are classified as transmissible spongiform
> encephalopathies, not infectious spongiform encephalopathies.
>
> C. My proposal is that flu is an infectious disease which is a
> transmissible disease. BSE is a transmissible disease, but not an
> infectious disease. Cancer is a transmissible disease, but not an
> infectious disease.
>
>
Yes, my model is somehow complicated. I think it more by aligning the concepts with what I have learned in biology. I accept the OGMS proposal that the disease is a disposition. However, as subclasses of disease, it is likely fine to include some extra restriction.
Oliver