Why do dogs cough from worms? - briefly
Dogs may cough due to worms because of the irritation and inflammation caused by the parasites in their respiratory system. The most common culprits are heartworms, which reside in the pulmonary arteries and can trigger a persistent cough in infected dogs.
Why do dogs cough from worms? - in detail
Dogs may cough due to worm infestations, primarily because of heartworm disease. Heartworm is caused by a parasitic worm known as Dirofilaria immitis, which is transmitted through mosquito bites. The life cycle of these worms involves several stages, with the final stage occurring in the dog's pulmonary arteries and heart. As immature worms (microfilariae) develop into adult worms, they can cause inflammation and obstruction within the lungs and blood vessels. This leads to coughing as a response to the irritation and reduced blood flow to lung tissues.
The severity of coughing depends on the number of worms present and the extent of damage to the pulmonary system. In advanced stages, heartworm disease can result in severe respiratory distress, including persistent coughing, difficulty breathing, lethargy, and even heart failure. Early detection through regular veterinary check-ups is crucial for effective treatment and prevention of further complications. Preventive measures such as monthly heartworm preventatives are essential to protect dogs from this potentially life-threatening condition.