Blue-Green Algae

Blue-green algae, or cyanobacteria, is often present in fresh water ponds and lakes. Some types of cyanobacteria can produce toxins when they are present in large numbers. An overgrowth, or bloom, of blue-green algae looks like pea soup floating on top of the water.

These blooms are caused by many factors, including a high nutrient content and warm weather. There is no way to visually distinguish between blooms of blue-green algae that are safe and those that are toxic.
Drinking or swimming in water with toxic algal blooms can be especially life-threatening to dogs.
Symptoms of blue-green algae poisoning include the following:

• Vomiting, diarrhea, or black tarry stools
• Loss of appetite
• Weakness or lethargy
• Pale or yellowish color
• Excessive drooling or tearing of the eyes
• Muscle tremors or stiffness
• Inability to walk
• Difficulty breathing or blue gums

If you suspect your dog has been exposed to blue-green algae toxins, see your veterinarian immediately or come see us here at VACC. There is no antidote for these toxins, so the sooner you seek medical help, the better the prognosis. In this case, prevention really is the best medicine, so make sure to take a look at the water before your dog jumps in. Click here for a list of ponds and lakes on Cape Cod that have blue-green algae advisories.