American Heartworm Society releases 2018 Canine Heartworm GuidelinesSeptember 17, 2018 The American Heartworm Society (AHS) has released 2018 Canine Heartworm Guidelines, which focus on reducing heartworm transmission, clarifying testing recommendations, and avoiding shortcuts in treatment. The 2018 guidelines reflect the following updates to the AHS' recommendations: Prevention Given the highly preventable nature of heartworms, prevention practices are the cornerstone of any practice's heartworm management program, said Chris Rehm, DVM, president of the AHS. "Unfortunately, the latest AHS survey found that incidence has been trending up rather than down, with the number of infected dogs per clinic rising by 21 percent in the U.S. and its territories between 2013 and 2016." Environmental and climatic changes, as well as the relocation of microfilaremic dogs and the expansion of microfilaremic wild canid territories are considered to be contributing factors to both incidence numbers and the spread of heartworms to areas once considered nonendemic, according to the AHS. "For these reasons, we continue to stress the importance of year-round administration of macrocyclic lactone preventives, along with practical steps to reduce mosquito exposure, such as eliminating standing water on the property and keeping pets indoors during peak mosquito times," said Dr. Rehm. "Year-round prevention is the single most important step …
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