Rectal Infection

Recently I found some shells within my bed which contained tiny larva.  Upon investigation I found out they were tinea larvae which are otherwise known as case making moths.

I have developed a worry since, that these larvae due to being found in my bed could have infected me.

The only possible way they could infect, I imagine, if they were to enter the anal passage.  I now have this somewhat irrational fear that they could get into the rectum and attack the rectal tissue and from there attack other tissues in the body.

Is there enough oxygen in the rectum for these creatures to survive as they are air breathers?  I know they wouldn't stand much chance if they crawled up further to the colon due to it's anaerobic environment.

But if these creatures were to attack the rectal tissue, and thus break through that barrier would they then have access to attack other organs in the body via the non vasculature route?  Or is there any air to be found where these organs are placed in the body?

I very much appreciate your help with this concern I have, however irrational it may be!