Threadworms usually can be treated with standard de-wormers on an outpatient basis. Another name for de-wormers is “anthelmintics.” Some medications that reportedly are effective against Strongyloides stercoralis include fenbendazole (Panacur), thiabendazole and ivermectin, among others. Not all of these are labeled for this use. These drugs can have potentially severe side effects. For example, ivermectin is not recommended for use in dogs that have tested positive for heartworm. In addition, many dogs are hyper-sensitive to ivermectin, including Collies, Shetland Sheepdogs and some other herding breeds. Ivermectin should not be used in those breeds.
The dog’s attending veterinarian is the only one who should recommend an appropriate de-wormer or other treatment in any given case and advise the owner on the correct dosage and duration of treatment. If the dog has become dehydrated as a result of a threadworm infection, its veterinarian may advise that it be supplemented with intravenous fluids until proper hydration has been reestablished.
The prognosis for most dogs infected with threadworms is usually very good, provided that appropriate treatment is administered for the proper length of time. Most veterinarians recommend repeating fresh fecal examinations monthly for up to 6 months, to be sure that the infection has been completely cleared. Unfortunately, the outlook for young animals that develop pneumonia and/or severe bloody diarrhea is guarded.