The use of antibiotics in this way, along with the use of a heartworm preventive, forms the basis for what is called the slow kill method of treatment, as described above. (vin.com)
Previously, the slow kill method of heartworm treatment was deemed acceptable for dogs in the class I (early) stage of heart disease but this has changed given confirmation of resistant strains. (vin.com)
She is heartworm positive, but we have started the slow kill method for her. (tangihumanesociety.org)