Diagnosed a Heartworm postive dog today.

This afternoon I did a heartworm test on a 8 year old staffy. He had missed 3 years of heartworm treatment when his owners where battiling cancer. He was a healthy dog except for some tartar and plaque on his teeth. I do so many heartworm test and so many come back negative. Even when I was working at the pound, testing abandoned dogs, heartworm was rare. So I was quite suprised to come back to my heartworm test and find a positive reading. I also had a look at the blood under the microscope and found some microfliara, I have not seem any of those for a long time. The lady owner was quite upset but is keen to treat the dog, and she booked him on Monday for further tests.