canker sores

charles mccarthy pandoc at
Sun Sep 10 14:14:55 EST 1995

In <42v94q$ovp at> tool at (( no user
name given ) ) writes: 
>can somebody tell me what virus or bactiruim causes canker sores?


The cause of true canker sores (recurrent aphthous stomatitis) is
unknown. However, the current Merck Manual states that "several 
factors point toward a localized immune reaction".  Stress and 
local trauma are listed as the usual precipitating factors.  
Susceptibility is increased with deficiencies of iron, vitamin B12, 
and folic acid.

Primary and recurrent herpetic lesions can appear concurrently, as well
as alone in the oral cavity, and are differentiated from canker sores,
as well as, benign mucosal pemphigoid, erythema multiforme, herpangina,
and oral pemphigus by the examining physician.

Charles P. McCarthy
Healthcare Consulting and 
   Medical Research
Carmichael, CA, USA

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