# Heartworm: The Invisible Threat That Kills Silently

_Published: July 30, 2025_

> So — read this before it's too late.

<h2 style="text-align: left;">One mosquito bite can change your dog's life. It might even take it.</h2>
<p><em><strong>So — read this before it's too late.</strong></em></p>

<h3 style="text-align: left;"><b>What is heartworm?</b></h3>
<p>Heartworm (Dirofilaria immitis) is a parasite that lives in a dog's heart and lungs.</p>
<p>It's transmitted through a mosquito bite, and it takes up to 6 months to develop from larva to adult worm – with no symptoms.</p>

<h3 style="text-align: left;"><b>How does a dog get infected with </b><b>heartworm</b><b>?</b></h3>
<ol>
<li aria-level="1">A mosquito transmits the larva when it bites</li>
<li aria-level="1">The larva travels through the body</li>
<li aria-level="1">It settles in the heart and lungs</li>
<li aria-level="1">It grows into a worm up to 30 cm long</li>
<li aria-level="1">Your dog becomes seriously at risk, and you're not even aware of it</li>
</ol>

<h3 style="text-align: left;"><b>Symptoms </b><b>of heartworm in your pet </b><b>(but they come late)</b></h3>
<p><b>⚠️ Unfortunately, symptoms often appear once things are already serious:</b></p>
<ul>
<li aria-level="1">Coughing, tiring quickly</li>
<li aria-level="1">Weight loss</li>
<li aria-level="1">Refusing food</li>
<li aria-level="1">Dark urine</li>
<li aria-level="1">Pale gums</li>
<li aria-level="1">In severe cases: sudden death</li>
</ul>

<h3 style="text-align: left;"><b>Why is </b><b>heartworm </b><b>dangerous?</b></h3>
<h5><b>A single dog can have dozens of worms in its heart and lungs.</b></h5>
<p>They cause:</p>
<ul>
<li aria-level="1">Damage to the heart and blood vessels</li>
<li aria-level="1">Pulmonary embolisms</li>
<li aria-level="1">Damage to the liver and kidneys</li>
<li aria-level="1">A high risk during treatment</li>
</ul>

<h3 style="text-align: left;"><b>How does a DOG DEFEND itself against </b><b>heartworm</b><b>?</b></h3>
<p>❌ It can't, on its own.</p>
<p>✅ Prevention is the only safe way!</p>

<h3 style="text-align: left;"><b>Prevention: What you can do to protect your pet from heartworm</b><b>?</b></h3>
<p>✔️ Give antiparasitics regularly (monthly tablets/spot-on)</p>
<p>✔️ Test your dog once a year</p>
<p>✔️ Protect your dog from mosquitoes</p>
<p>✔️ Consult your vet in time</p>

<p><em><b>Key message</b></em></p>
<p><i>    🎯 Don't wait for symptoms.</i></p>
<p><i>    🎯 Don't guess.</i></p>
<p><i>    🎯 Don't hope it won't happen to you.</i></p>
<p><i>Ask your vet TODAY – how to protect your dog from heartworm.</i></p>