To prevent recurrence of a yeast infection, it’s important to also treat any known causes, such as allergies or an active bacterial infection. You will also want to pay more attention to thoroughly drying your dog’s ears after baths and swims.
A prescription ear-drying solution may be helpful if your dog is prone to yeast infections of the ear. Going forward, it is also a good idea to clean and check your dog’s ears regularly. Ask your veterinarian which methods and cleaning solutions you should use for healthy ear maintenance.
Sources
ASPCA. “Ear Infections.” (May 12, 2011)
http://www.aspca.org/pet-care/dog-care/dog-care-ear-infections.aspx
Gotthelf, Louis N and Young, Steven E. “New Treatment of Malassezia Otitis Externa in Dogs.” Aug. 25, 1997. (May 12, 2011)
http://www.dermapet.com/articles/art-03.html
McKay, Scott Alan. “Yeast (Malassezia) Infections.” PetEducation, Doctors Foster and Smith. (May 12, 2011)
http://www.peteducation.com/article.cfm?c=2+2102&aid=321
PetMD. “Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs.” (May 12, 2011)
http://www.petmd.com/dog/conditions/skin/c_dg_malassezia_dermatitis
PetPlace. “Otitis Interna and Media in Dogs.” (May 12, 2011)
http://www.petplace.com/dogs/otitis-interna-and-media-in-dogs/page1.aspx