Levy, J., Edinboro, C., Glotfelty, C., et al. (2007). Seroprevalence of Dirofilaria immitis, Feline Leukemia Virus, and Feline Immunodeficiency Virus Infection Among Dogs and Cats Exported from the 2005 Gulf Coast Hurricane Disaster Area. Journal of the American Medical Veterinary Association. 231(2):218-225.
This article outlines a disease prevalence study of dogs and cats that were exported from the affected Gulf Coast states during the 2005 hurricane season. The authors found that nearly half of the dogs transported to temporary mass shelters tested positive for heartworm (which is estimated close to the non-disaster time rate in the Gulf Coast region).