Canine heartworm infection is widely distributed throughout the USA. Heartworm infection was found in dogs native to all 50 states. All dogs, regardless of their age, sex, or habitat, are susceptible to heartworm disease. The maximum infection rates (up to 45%) in puppies (not maintained on heartworm preventive) are observed within 150 kilometers of the Atlantic and Gulf coasts in the Gulf of Mexico into New Jersey and across the Mississippi River and its major tributaries. Additional areas of the United States might have lower incidence rates (5% or less) of canine heartworm disease, though some areas have ecological, mosquito population and dog population variables that allow a greater local incidence of heartworm disease. Regions where heartworm disease is common have diagnosed infections in dogs as young as one year of age, with most areas diagnosing illnesses primarily between the ages of eight and three years. Although there are differences in frequency of infection for a variety of groups of dogs, all dogs in most regions should be considered in danger, put on prevention programs and also often examined by a vet.Clinical SignsHeartworm disease may cause a combination of medical issues in precisely the exact same dog such as dysfunction of their lungs, heart, liver and kidneys. The disease could have an acute onset but generally begins with barely detectable signs caused by a chronic infection and also a combination of physiologic changes. Dogs with a very low number of rats in the body that aren't exercised strenuously may never have apparent signs of heartworm disease. But in the majority of dogs, the heart and lungs are the major organs affected by heartworms with varying levels of clinical signs.
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