Welcome to HCM!
After reading your question carefully I realize that the abrasion was small in size, difficult to locate, and below knee, making it grade I category...But the important point is that still you must get your self vaccinatd with anti
rabies serum, you will require fewer injections compared to usual ones.
It is important that you take treatment
--because rabies is fatal condition if developed once,
-because there is a protocol that if dog bite is un provoked you should get vaccinated
-because the dog was a stray one, means was not vaccinated for rabies itself
-because you will not be able to trace and keep a check on the dog for next ten days or so and see if he dosent develop signs of rabies!
& -Because you should not take a risk...
At least I would go for vaccines...
You have cleaned the wound in the right way, now go and meet the doctor and ASK for vaccines...taking vaccine won't harm you in any way!!
Hope this helps you in your issue
Please ask if you have any more queries
Dr. Manisha Gopal