You have not mentioned what type of colon
and rectal diseases
Your dad seems to be a recent diabetic under treatment.
should be tested.
Up to 5% is normal.
Those who live in the coastal area the count may be little high
There are tablet to reduce the count.
At the the same time associated condtions like Respiratory infections, Wheezing
and any allergic symtoms should also be treated
Anti-Worm & Anti Amoebic treatment is adviced