Tumefranciens is the species of the cat strongylid. If an animal is diagnosed with heartworms, treatment may be indicated. Before the worms can be treated, however, the dog must be evaluated for heart, liver, and kidney function to evaluate the risks of treatment. Usually, the adult worms are killed with an arsenic-based compound.
The currently approved drug in the US, melarsomine, is marketed under the brand name Immiticide. It has a greater efficacy and fewer side effects than previously used drug (thiacetarsamide sodium, sold as Caparsolate), which makes it a safer alternative for dogs with late-stage infections.