WAS THERE A GAP IN PREVENTION THAT LEFT THIS DOG SUSCEPTIBLE?

The “Window of Infection” is the time frame when a dog was likely infected with Dirofilaria immitis to result in a positive test for adult heartworm.
This time frame is based on the pet’s heartworm testing history and the life-cycle of Dirofilaria immitis. It extends from 6-9 months prior to the dog’s last negative test up to 6 months before the current positive test.
AN EXAMPLE
BABY’s WINDOW OF INFECTION

Baby’s test results | Purchase history | |||
---|---|---|---|---|
DATE | RESULT | DATE | DOSES IN PACK | DOGS PER PACK |
03/15/2015 | POS | 09/12/2014 | 12 | 2 |
01/16/2014 | NEG | 03/18/2014 | 12 | 2 |
01/11/2013 | NEG | 09/14/2013 | 12 | 2 |
01/11/2013 | 6 | 1 |
